2024 Vol. 48, No. 9
Display Method: |
2024, 48(9): 091001. doi: 10.1088/1674-1137/ad582a
Abstract:
The proton-proton (\begin{document}$ pp $\end{document} ![]()
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\begin{document}$ pp $\end{document} ![]()
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\begin{document}$ {\cal{O}} $\end{document} ![]()
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\begin{document}$ pp $\end{document} ![]()
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\begin{document}$ \times $\end{document} ![]()
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\begin{document}$ pp $\end{document} ![]()
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\begin{document}$ (8.0 \pm 3.9 \,{\rm{(stat)}} \pm 10.0 \,{\rm{(syst)}} )\times 10^{10}\, $\end{document} ![]()
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\begin{document}$ \rm{s}^{-1} \rm{cm}^{-2} $\end{document} ![]()
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\begin{document}$ 23.3\times 10^{10}\, $\end{document} ![]()
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\begin{document}$ \rm{s}^{-1} \rm{cm}^{-2} $\end{document} ![]()
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The proton-proton (
2024, 48(9): 093001. doi: 10.1088/1674-1137/ad595b
Abstract:
The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×106.
The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×106.
2024, 48(9): 093101. doi: 10.1088/1674-1137/ad5427
Abstract:
We study the SM-like Higgs boson decays\begin{document}$ h\rightarrow MZ $\end{document} ![]()
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\begin{document}$(\rho,\omega,\phi,J/\psi,\Upsilon)$\end{document} ![]()
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\begin{document}$ S U$\end{document} ![]()
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\begin{document}$ h\rightarrow MZ $\end{document} ![]()
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\begin{document}$ h\gamma Z $\end{document} ![]()
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\begin{document}$ h\rightarrow Z\gamma $\end{document} ![]()
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We study the SM-like Higgs boson decays
2024, 48(9): 093102. doi: 10.1088/1674-1137/ad4d61
Abstract:
Heavy neutral leptons N are the most appealing candidates to generate tiny neutrino masses. We studied the signature of heavy neutral leptons in gauged\begin{document}$ U(1)_{L_\mu-L_\tau} $\end{document} ![]()
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\begin{document}$ U(1)_{L_\mu-L_\tau} $\end{document} ![]()
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\begin{document}$ Z' $\end{document} ![]()
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\begin{document}$ \mu^+\mu^-\to Z^{\prime *}\to NN $\end{document} ![]()
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\begin{document}$ \mu^+\mu^-\to Z^{\prime (*)} \gamma\to NN\gamma $\end{document} ![]()
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\begin{document}$ \mu^+\mu^-\to NN\to \mu^\pm\mu^\pm W^\mp W^\mp $\end{document} ![]()
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\begin{document}$ \mu^+\mu^-\to NN \gamma\to \mu^\pm\mu^\pm W^\mp W^\mp \gamma $\end{document} ![]()
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\begin{document}$ g'=0.6 $\end{document} ![]()
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\begin{document}$ ^{-1} $\end{document} ![]()
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\begin{document}$ \mu^\pm\mu^\pm JJ $\end{document} ![]()
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\begin{document}$ m_{Z'}\lesssim 13 $\end{document} ![]()
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\begin{document}$ 2 m_N<m_{Z'}<\sqrt{s} $\end{document} ![]()
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\begin{document}$ \mu^\pm\mu^\pm JJ\gamma $\end{document} ![]()
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\begin{document}$ \mu^\pm\mu^\pm JJ $\end{document} ![]()
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Heavy neutral leptons N are the most appealing candidates to generate tiny neutrino masses. We studied the signature of heavy neutral leptons in gauged
2024, 48(9): 093103. doi: 10.1088/1674-1137/ad53b7
Abstract:
In this study, we evaluated the mass spectra of the prospective\begin{document}$ 0^{--} $\end{document} ![]()
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\begin{document}$ 0^{--} $\end{document} ![]()
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\begin{document}$ (4.68\pm0.07) $\end{document} ![]()
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\begin{document}$ (4.22\pm0.09) $\end{document} ![]()
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\begin{document}$ (4.53\pm0.09) $\end{document} ![]()
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\begin{document}$ (4.26\pm0.13) $\end{document} ![]()
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\begin{document}$ (11.04\pm0.10) $\end{document} ![]()
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\begin{document}$ (10.71\pm0.12) $\end{document} ![]()
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\begin{document}$ (11.09\pm0.10) $\end{document} ![]()
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\begin{document}$ (11.82\pm0.14) $\end{document} ![]()
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In this study, we evaluated the mass spectra of the prospective
2024, 48(9): 093104. doi: 10.1088/1674-1137/ad57a7
Abstract:
In this study, we explore the potentials of dipole operators and four-fermion operators at low-energy lepton colliders such as Belle II and the Super Tau Charm Facility (STCF). We utilize high-dimension operators to characterize such anomalous interactions, focusing on those that do not interfere with the Standard Model (SM) contributions. With polarized beams, the four-fermion operators and dipole moment operators can be tested with high precision.
In this study, we explore the potentials of dipole operators and four-fermion operators at low-energy lepton colliders such as Belle II and the Super Tau Charm Facility (STCF). We utilize high-dimension operators to characterize such anomalous interactions, focusing on those that do not interfere with the Standard Model (SM) contributions. With polarized beams, the four-fermion operators and dipole moment operators can be tested with high precision.
2024, 48(9): 093105. doi: 10.1088/1674-1137/ad53bb
Abstract:
In the present study, we investigated the decays of the top quark:\begin{document}$ t\rightarrow c\gamma $\end{document} ![]()
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\begin{document}$ t\rightarrow cg $\end{document} ![]()
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\begin{document}$ t\rightarrow cZ $\end{document} ![]()
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\begin{document}$ t\rightarrow ch $\end{document} ![]()
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\begin{document}$ U(1) $\end{document} ![]()
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\begin{document}$ U(1)_X $\end{document} ![]()
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\begin{document}$ t\rightarrow c\gamma,\; cg,\; cZ,\; ch $\end{document} ![]()
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\begin{document}$ \tan\beta $\end{document} ![]()
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\begin{document}$ g_X $\end{document} ![]()
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\begin{document}$ g_{YX} $\end{document} ![]()
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\begin{document}$ \mu $\end{document} ![]()
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\begin{document}$ M_2 $\end{document} ![]()
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\begin{document}$ \lambda_H $\end{document} ![]()
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\begin{document}$ M_{U23}^2 $\end{document} ![]()
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\begin{document}$ M_{Q23}^2 $\end{document} ![]()
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In the present study, we investigated the decays of the top quark:
2024, 48(9): 093106. doi: 10.1088/1674-1137/ad5426
Abstract:
Motivated by the recent experimental results of branching fractions for\begin{document}$ {D}_{\left(s\right)}^{+}\to {\eta }^{\left({'}\right)}\overline{l}{\nu }_{l} $\end{document} ![]()
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\begin{document}${W}'$\end{document} ![]()
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\begin{document}$ c\to (s,d)\overline{l}{\nu }_{l} $\end{document} ![]()
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\begin{document}$ D $\end{document} ![]()
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\begin{document}$ 1\sigma $\end{document} ![]()
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Motivated by the recent experimental results of branching fractions for
2024, 48(9): 093107. doi: 10.1088/1674-1137/ad53bd
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The unquenched quark model for the light quarkonium and charmonium states is explored in this study. The quark-pair creation operator in the\begin{document}$^3P_0$\end{document} ![]()
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\begin{document}$X(3872)$\end{document} ![]()
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The unquenched quark model for the light quarkonium and charmonium states is explored in this study. The quark-pair creation operator in the
2024, 48(9): 093108. doi: 10.1088/1674-1137/ad5663
Abstract:
In this study, we explore the detectability of heavy Higgs bosons in the\begin{document}$ pp \to b\bar{b}H/A \to b\bar{b}t\bar{t} $\end{document} ![]()
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\begin{document}$ ^{-1} $\end{document} ![]()
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\begin{document}$ \tan\beta $\end{document} ![]()
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\begin{document}$ \tan\beta $\end{document} ![]()
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\begin{document}$ \tan\beta $\end{document} ![]()
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In this study, we explore the detectability of heavy Higgs bosons in the
2024, 48(9): 093109. doi: 10.1088/1674-1137/ad5ae9
Abstract:
In this study, a comprehensive analysis of jets and underlying events as a function of charged particle multiplicity in proton-proton (pp) collisions at a center-of-mass energy of\begin{document}$ \sqrt{s} = 7 $\end{document} ![]()
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\begin{document}$_{\rm Hydro}$\end{document} ![]()
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\begin{document}$_{\rm noHydro}$\end{document} ![]()
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\begin{document}$ |\eta| < 2.4 $\end{document} ![]()
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\begin{document}$ p_{T} > 0.25 $\end{document} ![]()
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\begin{document}$4_{\rm Hydro}$\end{document} ![]()
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\begin{document}$p_{T}^{\rm ch.jet} > 5$\end{document} ![]()
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\begin{document}$_{\rm Hydro}$\end{document} ![]()
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\begin{document}$p_{T}^{\rm ch.jet} > 30$\end{document} ![]()
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\begin{document}$_{\rm Hydro}$\end{document} ![]()
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\begin{document}$ p_{T} $\end{document} ![]()
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\begin{document}$ p_{T} $\end{document} ![]()
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\begin{document}$_{\rm Hydro}$\end{document} ![]()
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\begin{document}$_{\rm noHydro}$\end{document} ![]()
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In this study, a comprehensive analysis of jets and underlying events as a function of charged particle multiplicity in proton-proton (pp) collisions at a center-of-mass energy of
2024, 48(9): 093110. doi: 10.1088/1674-1137/ad5bd5
Abstract:
This paper presents a comprehensive analysis of the MD-BFKL equation, considering both shadowing and anti-shadowing effects in gluon recombination processes. By deriving analytical expressions for unintegrated gluon distributions through the solution of the MD-BFKL equation, with and without the incorporation of the anti-shadowing effect, we offer new insights into the influence of these effects on the behavior of unintegrated gluon distributions. Our results, when compared to those from the CT18NLO gluon distribution function, demonstrate that the anti-shadowing effect has a notably stronger impact on the characteristics of unintegrated gluon distributions, particularly in regions of high rapidity and momentum. This work significantly contributes to the understanding of gluon recombination mechanisms and their implications in high energy physics.
This paper presents a comprehensive analysis of the MD-BFKL equation, considering both shadowing and anti-shadowing effects in gluon recombination processes. By deriving analytical expressions for unintegrated gluon distributions through the solution of the MD-BFKL equation, with and without the incorporation of the anti-shadowing effect, we offer new insights into the influence of these effects on the behavior of unintegrated gluon distributions. Our results, when compared to those from the CT18NLO gluon distribution function, demonstrate that the anti-shadowing effect has a notably stronger impact on the characteristics of unintegrated gluon distributions, particularly in regions of high rapidity and momentum. This work significantly contributes to the understanding of gluon recombination mechanisms and their implications in high energy physics.
2024, 48(9): 094001. doi: 10.1088/1674-1137/ad50b9
Abstract:
The complete and incomplete fusion cross section as well as one-neutron stripping process of 6Li + 94Zr system were measured at the energies around the Coulomb barrier by online γ-ray method. In addition to a 30% suppression factor when compared with the measured total fusion process, the complete fusion cross section in 6Li + 94Zr system was observed to be significantly lower than those in the nearby 6Li + 90, 96Zr system. The new experimental result implies that the coupling with breakup channel in the 6Li-induced fusion processes can be affected by the inner structure of the target, which is still not clear in any available model calculation. For the one-neutron stripping process, the direct production cross sections for each level in 95Zr were extracted and compared with the coupled reaction channel calculation, offering a unique opportunity to examine the single-particle nature of the produced excited states. Given the fact that an overall overestimation of the production cross section for 954-keV and 1618-keV levels was observed in the comparison, further investigation is highly demanded in order to understand the full reaction mechanism for the one-neutron stripping process induced by 6Li.
The complete and incomplete fusion cross section as well as one-neutron stripping process of 6Li + 94Zr system were measured at the energies around the Coulomb barrier by online γ-ray method. In addition to a 30% suppression factor when compared with the measured total fusion process, the complete fusion cross section in 6Li + 94Zr system was observed to be significantly lower than those in the nearby 6Li + 90, 96Zr system. The new experimental result implies that the coupling with breakup channel in the 6Li-induced fusion processes can be affected by the inner structure of the target, which is still not clear in any available model calculation. For the one-neutron stripping process, the direct production cross sections for each level in 95Zr were extracted and compared with the coupled reaction channel calculation, offering a unique opportunity to examine the single-particle nature of the produced excited states. Given the fact that an overall overestimation of the production cross section for 954-keV and 1618-keV levels was observed in the comparison, further investigation is highly demanded in order to understand the full reaction mechanism for the one-neutron stripping process induced by 6Li.
2024, 48(9): 094101. doi: 10.1088/1674-1137/ad5428
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The neutron capture rates and temperature dependent stellar beta decay rates of Mo isotopes are investigated within the framework of the statistical code TALYS v1.96 and the proton neutron quasi particle random phase approximation (pn-QRPA) model. The Maxwellian average cross-section (MACS) and neutron capture rates for the\begin{document}$ ^{95-98} $\end{document} ![]()
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\begin{document}$ ^{96-99} $\end{document} ![]()
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\begin{document}$ ^{95-98} $\end{document} ![]()
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The neutron capture rates and temperature dependent stellar beta decay rates of Mo isotopes are investigated within the framework of the statistical code TALYS v1.96 and the proton neutron quasi particle random phase approximation (pn-QRPA) model. The Maxwellian average cross-section (MACS) and neutron capture rates for the
2024, 48(9): 094102. doi: 10.1088/1674-1137/ad4f70
Abstract:
Recently, studies have argued that a spherical-like spectrum emerges in the SU3-IBM, thus creating new approaches to understanding γ-softness in realistic nuclei. In a previous study, γ-softness with degeneracy of the ground and quasi-γ bands was observed. In this paper, another special point connected to the middle degenerate point is discussed. It is found to be related to the properties of 196Pt. This emergent γ-softness is also shown to be important for understanding the prolate-oblate asymmetric shape phase transition. The low-lying spectra,\begin{document}$ B(E2) $\end{document} ![]()
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Recently, studies have argued that a spherical-like spectrum emerges in the SU3-IBM, thus creating new approaches to understanding γ-softness in realistic nuclei. In a previous study, γ-softness with degeneracy of the ground and quasi-γ bands was observed. In this paper, another special point connected to the middle degenerate point is discussed. It is found to be related to the properties of 196Pt. This emergent γ-softness is also shown to be important for understanding the prolate-oblate asymmetric shape phase transition. The low-lying spectra,
2024, 48(9): 094103. doi: 10.1088/1674-1137/ad53b8
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Based on the Weizsäcker-Skyrme (WS4) mass model, the fission barriers of nuclei are systematically studied. Considering the shell corrections, macroscopic deformation energy, and a phenomenological residual correction, the fission barrier heights for nuclei with\begin{document}$Z\geqslant 82$\end{document} ![]()
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\begin{document}$\beta$\end{document} ![]()
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Based on the Weizsäcker-Skyrme (WS4) mass model, the fission barriers of nuclei are systematically studied. Considering the shell corrections, macroscopic deformation energy, and a phenomenological residual correction, the fission barrier heights for nuclei with
2024, 48(9): 094104. doi: 10.1088/1674-1137/ad5662
Abstract:
In this study, we measured the 58Ni(n, p)58Co reaction cross section with neutron energies of 1.06, 1.86, and 2.85 MeV. The cross section was measured using neutron activation techniques and γ-ray spectroscopy, and it was compared with cross section data available in the EXFOR. Furthermore, we calculated the covariance matrix of the measured cross section for the aforementioned nuclear reaction. The uncertainties of the theoretical calculation for 58Ni(n, p)58Co reaction cross section were calculated via Monte Carlo method. In this study, we used uncertainties in the optical model and level density parameters to calculate uncertainties in the theoretical cross sections. The theoretical calculations were performed by using TALYS-1.96. In this study, we aim to analyze the effect of uncertainties of the nuclear model input as well as different experimental variables used to obtain the values of reaction cross section.
In this study, we measured the 58Ni(n, p)58Co reaction cross section with neutron energies of 1.06, 1.86, and 2.85 MeV. The cross section was measured using neutron activation techniques and γ-ray spectroscopy, and it was compared with cross section data available in the EXFOR. Furthermore, we calculated the covariance matrix of the measured cross section for the aforementioned nuclear reaction. The uncertainties of the theoretical calculation for 58Ni(n, p)58Co reaction cross section were calculated via Monte Carlo method. In this study, we used uncertainties in the optical model and level density parameters to calculate uncertainties in the theoretical cross sections. The theoretical calculations were performed by using TALYS-1.96. In this study, we aim to analyze the effect of uncertainties of the nuclear model input as well as different experimental variables used to obtain the values of reaction cross section.
2024, 48(9): 095001. doi: 10.1088/1674-1137/ad50ab
Abstract:
The exponential growth of astronomical datasets provides an unprecedented opportunity for humans to gain insight into the Universe. However, effectively analyzing this vast amount of data poses a significant challenge. In response, astronomers are turning to deep learning techniques, but these methods are limited by their specific training sets, leading to considerable duplicate workloads. To overcome this issue, we built a framework for the general analysis of galaxy images based on a large vision model (LVM) plus downstream tasks (DST), including galaxy morphological classification, image restoration, object detection, parameter extraction, and more. Considering the low signal-to-noise ratios of galaxy images and the imbalanced distribution of galaxy categories, we designed our LVM to incorporate a Human-in-the-loop (HITL) module, which leverages human knowledge to enhance the reliability and interpretability of processing galaxy images interactively. The proposed framework exhibits notable few-shot learning capabilities and versatile adaptability for all the abovementioned tasks on galaxy images in the DESI Legacy Imaging Surveys. In particular, for the object detection task, which was trained using 1000 data points, our DST in the LVM achieved an accuracy of 96.7%, while ResNet50 plus Mask R-CNN reached an accuracy of 93.1%. For morphological classification, to obtain an area under the curve (AUC) of ~0.9, LVM plus DST and HITL only requested 1/50 of the training sets that ResNet18 requested. In addition, multimodal data can be integrated, which creates possibilities for conducting joint analyses with datasets spanning diverse domains in the era of multi-messenger astronomy.
The exponential growth of astronomical datasets provides an unprecedented opportunity for humans to gain insight into the Universe. However, effectively analyzing this vast amount of data poses a significant challenge. In response, astronomers are turning to deep learning techniques, but these methods are limited by their specific training sets, leading to considerable duplicate workloads. To overcome this issue, we built a framework for the general analysis of galaxy images based on a large vision model (LVM) plus downstream tasks (DST), including galaxy morphological classification, image restoration, object detection, parameter extraction, and more. Considering the low signal-to-noise ratios of galaxy images and the imbalanced distribution of galaxy categories, we designed our LVM to incorporate a Human-in-the-loop (HITL) module, which leverages human knowledge to enhance the reliability and interpretability of processing galaxy images interactively. The proposed framework exhibits notable few-shot learning capabilities and versatile adaptability for all the abovementioned tasks on galaxy images in the DESI Legacy Imaging Surveys. In particular, for the object detection task, which was trained using 1000 data points, our DST in the LVM achieved an accuracy of 96.7%, while ResNet50 plus Mask R-CNN reached an accuracy of 93.1%. For morphological classification, to obtain an area under the curve (AUC) of ~0.9, LVM plus DST and HITL only requested 1/50 of the training sets that ResNet18 requested. In addition, multimodal data can be integrated, which creates possibilities for conducting joint analyses with datasets spanning diverse domains in the era of multi-messenger astronomy.
2024, 48(9): 095101. doi: 10.1088/1674-1137/ad53ba
Abstract:
Phase transition is important for understanding the nature and evolution of the black hole thermodynamic system. In this study, we predicted the phase transition of the third-order Lovelock black hole using the winding numbers in complex analysis, and qualitatively validated this prediction by the generalized free energy. For the 7<d<12-dimensional black holes in hyperbolic topology and the 7-dimensional black hole in spherical topology, the winding number obtained is three, which indicates that the system undergoes first-order and second-order phase transitions. For the 7<d<12-dimensional black holes in spherical topology, the winding number is four, and two scenarios of phase transitions exist, one involving a purely second-order phase transition and the other involving simultaneous first-order and second-order phase transitions. This result further deepens the research on black hole phase transitions using the complex analysis.
Phase transition is important for understanding the nature and evolution of the black hole thermodynamic system. In this study, we predicted the phase transition of the third-order Lovelock black hole using the winding numbers in complex analysis, and qualitatively validated this prediction by the generalized free energy. For the 7<d<12-dimensional black holes in hyperbolic topology and the 7-dimensional black hole in spherical topology, the winding number obtained is three, which indicates that the system undergoes first-order and second-order phase transitions. For the 7<d<12-dimensional black holes in spherical topology, the winding number is four, and two scenarios of phase transitions exist, one involving a purely second-order phase transition and the other involving simultaneous first-order and second-order phase transitions. This result further deepens the research on black hole phase transitions using the complex analysis.
2024, 48(9): 095102. doi: 10.1088/1674-1137/ad50aa
Abstract:
In this article, we present a dynamical system analysis of a Dirac-Born-Infeld scalar field in a modified\begin{document}$ f(Q) $\end{document} ![]()
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\begin{document}$ f(Q) $\end{document} ![]()
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In this article, we present a dynamical system analysis of a Dirac-Born-Infeld scalar field in a modified
2024, 48(9): 095103. doi: 10.1088/1674-1137/ad50ba
Abstract:
In this study, we investigate the detectability of the secondary spin in an extreme mass ratio inspiral (EMRI) system within a modified gravity model coupled with a scalar field. The central black hole, which reduces to a Kerr one, is circularly spiralled by a scalar-charged spinning secondary body on the equatorial plane. The analysis reveals that the presence of the scalar field amplifies the secondary spin effect, allowing for a lower limit of the detectability and an improved resolution of the secondary spin when the scalar charge is sufficiently large. Our findings suggest that secondary spin detection is more feasible when the primary mass is not large, and TianQin is the optimal choice for detection.
In this study, we investigate the detectability of the secondary spin in an extreme mass ratio inspiral (EMRI) system within a modified gravity model coupled with a scalar field. The central black hole, which reduces to a Kerr one, is circularly spiralled by a scalar-charged spinning secondary body on the equatorial plane. The analysis reveals that the presence of the scalar field amplifies the secondary spin effect, allowing for a lower limit of the detectability and an improved resolution of the secondary spin when the scalar charge is sufficiently large. Our findings suggest that secondary spin detection is more feasible when the primary mass is not large, and TianQin is the optimal choice for detection.
2024, 48(9): 095104. doi: 10.1088/1674-1137/ad5ae4
Abstract:
Cosmological observations can be used to weigh neutrinos, but this method is model-dependent, with results relying on the cosmological model considered. If we consider interactions between dark energy and dark matter, the neutrino mass constraints differ from those derived under the standard model. On the contrary, gravitational wave (GW) standard siren observations can measure absolute cosmological distances, helping to break parameter degeneracies inherent in traditional cosmological observations, thereby improving constraints on neutrino mass. This paper examines the constraints on neutrino mass within interacting dark energy (IDE) models and explores how future GW standard siren observations could enhance these results. For multi-messenger GW observations, we consider the joint observations of binary neutron star mergers by third-generation ground-based GW detectors and short γ-ray burst observations by missions similar to the THESEUS satellite project. Using current cosmological observations (CMB+BAO+SN), we obtain an upper limit on the neutrino mass in the IDE models of 0.15 (or 0.16) eV. With the inclusion of GW data, the upper limit on the neutrino mass improves to 0.14 eV. This indicates that in the context of IDE models, the improvement in neutrino mass constraints from GW observations is relatively limited. However, GW observations significantly enhance the constraints on other cosmological parameters, such as matter density parameter, the Hubble constant, and coupling strength between dark energy and dark matter.
Cosmological observations can be used to weigh neutrinos, but this method is model-dependent, with results relying on the cosmological model considered. If we consider interactions between dark energy and dark matter, the neutrino mass constraints differ from those derived under the standard model. On the contrary, gravitational wave (GW) standard siren observations can measure absolute cosmological distances, helping to break parameter degeneracies inherent in traditional cosmological observations, thereby improving constraints on neutrino mass. This paper examines the constraints on neutrino mass within interacting dark energy (IDE) models and explores how future GW standard siren observations could enhance these results. For multi-messenger GW observations, we consider the joint observations of binary neutron star mergers by third-generation ground-based GW detectors and short γ-ray burst observations by missions similar to the THESEUS satellite project. Using current cosmological observations (CMB+BAO+SN), we obtain an upper limit on the neutrino mass in the IDE models of 0.15 (or 0.16) eV. With the inclusion of GW data, the upper limit on the neutrino mass improves to 0.14 eV. This indicates that in the context of IDE models, the improvement in neutrino mass constraints from GW observations is relatively limited. However, GW observations significantly enhance the constraints on other cosmological parameters, such as matter density parameter, the Hubble constant, and coupling strength between dark energy and dark matter.
2024, 48(9): 095105. doi: 10.1088/1674-1137/ad5a70
Abstract:
In this study, we investigated the optical properties of charged black holes within the Einstein-Maxwell-scalar (EMS) theory. We evaluated the shadow cast by these black holes and obtained analytical solutions for both the radius of the photon sphere and that of the shadow. We observed that black hole parameters γ and β both influence the shadow of black holes. We also found that the photon sphere and shadow radius increase as a consequence of the presence of the parameter γ. Interestingly, the shadow radius decreases first and then remains unchanged owing to the impact of the parameter β. Finally, we analyzed the weak gravitational lensing and total magnification of lensed images around black holes. We found that the charge of the black holes and the parameter β both have a significant impact, reducing the deflection angle. Similarly, the same behavior for the total magnification was observed, also as a result of the effect of the charge of the black holes and the parameter β.
In this study, we investigated the optical properties of charged black holes within the Einstein-Maxwell-scalar (EMS) theory. We evaluated the shadow cast by these black holes and obtained analytical solutions for both the radius of the photon sphere and that of the shadow. We observed that black hole parameters γ and β both influence the shadow of black holes. We also found that the photon sphere and shadow radius increase as a consequence of the presence of the parameter γ. Interestingly, the shadow radius decreases first and then remains unchanged owing to the impact of the parameter β. Finally, we analyzed the weak gravitational lensing and total magnification of lensed images around black holes. We found that the charge of the black holes and the parameter β both have a significant impact, reducing the deflection angle. Similarly, the same behavior for the total magnification was observed, also as a result of the effect of the charge of the black holes and the parameter β.
2024, 48(9): 095106. doi: 10.1088/1674-1137/ad53b9
Abstract:
In this study, we investigate the bulk-boundary and restricted phase space (RPS) thermodynamics of Rissner-Nordström (R-N) AdS and 6-dimensional charged Gauss-Bonnet AdS black holes. Additionally, we examine the topological characteristics of the considered black holes and compare them with the results of extended thermodynamics. We determine that the topological behavior of the bulk-boundary thermodynamics is the same as that of the extended thermodynamics, whereas the RPS thermodynamics exhibits a distinct behavior. Furthermore, we demonstrate that within the RPS formalism, there is only one critical point with a topological charge of +1\begin{document}$ (Q_t=+1) $\end{document} ![]()
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In this study, we investigate the bulk-boundary and restricted phase space (RPS) thermodynamics of Rissner-Nordström (R-N) AdS and 6-dimensional charged Gauss-Bonnet AdS black holes. Additionally, we examine the topological characteristics of the considered black holes and compare them with the results of extended thermodynamics. We determine that the topological behavior of the bulk-boundary thermodynamics is the same as that of the extended thermodynamics, whereas the RPS thermodynamics exhibits a distinct behavior. Furthermore, we demonstrate that within the RPS formalism, there is only one critical point with a topological charge of +1
2024, 48(9): 095107. doi: 10.1088/1674-1137/ad4c58
Abstract:
In this paper, we analyze inflationary parameters and swampland conjectures in the presence of a scalar field and Chaplygin models. We examine inflationary parameters, such as slow-roll parameters, scalar and tensor power spectra, spectral index, and tensor-to-scalar ratio, in the presence of a scalar field and Chaplygin gas models. We also discuss recently proposed swampland conjectures. We assume that the inflationary expansion is driven by a standard scalar field with a decay ratio Γ that has a generic power-law dependence on the scalar field ϕ and that the temperature of the thermal bath T is given by\begin{document}$\Gamma(\phi,T)= C_{\phi} {T^{a}}/{\phi^{a-1}}$\end{document} ![]()
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\begin{document}$C_{\phi}$\end{document} ![]()
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\begin{document}$(R\gg1)$\end{document} ![]()
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\begin{document}${{\cal{P}}_{{\cal{R}}}}$\end{document} ![]()
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\begin{document}$n_{s}$\end{document} ![]()
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\begin{document}$\dfrac{{\rm d}n_{s}}{{\rm d}\ln{k}}$\end{document} ![]()
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\begin{document}$\dfrac{T'V}{V'T}$\end{document} ![]()
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In this paper, we analyze inflationary parameters and swampland conjectures in the presence of a scalar field and Chaplygin models. We examine inflationary parameters, such as slow-roll parameters, scalar and tensor power spectra, spectral index, and tensor-to-scalar ratio, in the presence of a scalar field and Chaplygin gas models. We also discuss recently proposed swampland conjectures. We assume that the inflationary expansion is driven by a standard scalar field with a decay ratio Γ that has a generic power-law dependence on the scalar field ϕ and that the temperature of the thermal bath T is given by
2024, 48(9): 095108. doi: 10.1088/1674-1137/ad57a5
Abstract:
Using AdS/CFT correspondence, we analyze the holographic Einstein images via the response function of the complex scalar field as a probe wave on an AdS Schwarzschild scalar-tensor-vector gravity (STVG) black hole (BH). We find that the amplitude of the response function\begin{document}$|\langle O\rangle|$\end{document} ![]()
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\begin{document}$h_{e}$\end{document} ![]()
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\begin{document}$h_{e}$\end{document} ![]()
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Using AdS/CFT correspondence, we analyze the holographic Einstein images via the response function of the complex scalar field as a probe wave on an AdS Schwarzschild scalar-tensor-vector gravity (STVG) black hole (BH). We find that the amplitude of the response function
2024, 48(9): 095109. doi: 10.1088/1674-1137/ad57b0
Abstract:
The local topological properties of black hole systems can be expressed through winding numbers as defects. To date, AdS black hole thermodynamics are often depicted by the dual parameters of\begin{document}$ (T,S),\; (P,V), (\Phi, Q) $\end{document} ![]()
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The local topological properties of black hole systems can be expressed through winding numbers as defects. To date, AdS black hole thermodynamics are often depicted by the dual parameters of
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