Chinese Physics C

2019 Vol. 43, No. 7

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PARTICLES AND FIELDS
NUCLEAR PHYSICS
PARTICLE AND NUCLEAR ASTROPHYSICS AND COSMOLOGY

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PARTICLES AND FIELDS

Probing the CP violating Hγγ coupling using interferometry

Xia Wan, You-Kai Wang

2019, 43(7): 073101. doi: 10.1088/1674-1137/43/7/073101

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Abstract:
The diphoton invariant mass distribution from the interference between

$\begin{document}$gg\to H \to \gamma\gamma$\end{document}$

and

$\begin{document}$gg\to \gamma\gamma$\end{document}$

is almost antisymmetric around the Higgs mass

\begin{document}$M_H$...

New physics search in the doubly weak decay

${{\overline B}^0 \to K^+ \pi^- }$

Faisal Munir Bhutta, Ying Li, Cai-Dian Lü, Yue-Hong Xie

2019, 43(7): 073102. doi: 10.1088/1674-1137/43/7/073102

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Abstract:
The doubly weak transition

$\begin{document}$b\to dd{\bar s}$\end{document}$

is highly suppressed in the Standard Model, which makes it a potential channel for exploring new physics signals. We present a study of the exclusive two-body wrong sign weak...

Faisal Munir Bhutta, Ying Li, Cai-Dian Lü and Yue-Hong Xie. New physics search in the doubly weak decay

$\begin{document}${{\overline B}^0 \to K^+ \pi^- }$\end{document}$

[J]. Chinese Physics C, 2019, 43(7): 073102. doi: 10.1088/1674-1137/43/7/073102.

S-wave contributions to

${{{\bar B}_s^0\to (D^0,{\bar D}^0)\pi^+\pi^-}}$ in the perturbative QCD framework

Ye Xing, Zhi-Peng Xing

2019, 43(7): 073103. doi: 10.1088/1674-1137/43/7/073103

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Abstract:

$\begin{document}$\bar B_s^0\to (D^0,\bar D^0) \pi^+\pi^-$\end{document}$

is induced by the

$\begin{document}$b\to c \bar us$\end{document}$

$\begin{document}$b \to u\bar cs$\end{document}$

transitions, which can interfere if a CP-eigenstate

\begin{documen...

Ye Xing and Zhi-Peng Xing. S-wave contributions to

$\begin{document}${{{\bar B}_s^0\to (D^0,{\bar D}^0)\pi^+\pi^-}}$\end{document}$

in the perturbative QCD framework[J]. Chinese Physics C, 2019, 43(7): 073103. doi: 10.1088/1674-1137/43/7/073103.

NUCLEAR PHYSICS

Chiral criticality and glue dynamics

Wei-Jie Fu

2019, 43(7): 074101. doi: 10.1088/1674-1137/43/7/074101

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Abstract:
The chiral order-parameter σ field and its higher-order cumulants of fluctuations are calculated within the functional renormalization group approach by adopting the local potential approximation in this study. The influence of glue dynamics on fluct...

Search for decay modes of heavy and superheavy nuclei

A. Soylu

2019, 43(7): 074102. doi: 10.1088/1674-1137/43/7/074102

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Abstract:
Spontaneous fission (SF) with a new formula based on a liquid drop model is proposed and used in the calculation of the SF half-lives of heavy and superheavy nuclei (Z = 90–120). The predicted half-lives are in agreement with the experimental SF half...

Cross-section prediction for isotopes near neutron drip line in ^{70, 80}Zn projectile fragmentation reactions

Hui-Ling Wei, Yi-Dan Song, Chun-Wang Ma, Zhi-Hong Li, Jun Su

2019, 43(7): 074103. doi: 10.1088/1674-1137/43/7/074103

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Abstract:
The cross sections for ^{59, 60}Ca, recently measured in the 345 A MeV

$\begin{document}$^{70}{\rm{Zn}}+^{9}{\rm{Be}}$\end{document}$

reaction, were estimated using the FRACS parametrization and an empirical formula, which are in good agreement. The FRACS...

Mass predictions of the relativistic continuum Hartree-Bogoliubov model with radial basis function approach

Min Shi, Zhong-Ming Niu, Hao-Zhao Liang

2019, 43(7): 074104. doi: 10.1088/1674-1137/43/7/074104

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Abstract:
The radial basis function (RBF) approach is a powerful tool to improve nuclear mass predictions. By combining the RBF approach with the latest relativistic continuum Hartree-Bogoliubov (RCHB) model, the local systematic deviations between the RCHB ma...

Squeezed back-to-back correlations of K ⁺K ⁻in d + Au collisions at

${\sqrt{{s_{NN}}}}$ =200 GeV and Au + Au collisions at

${\sqrt{{s_{NN}}}}$ = 62.4 GeV

Yong Zhang, Jing Yang, Weihua Wu

2019, 43(7): 074105. doi: 10.1088/1674-1137/43/7/074105

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Abstract:
We investigate the squeezed back-to-back correlations (BBC) of

$\begin{document}$ K^+ $\end{document}$

$\begin{document}$ K^- $\end{document}$

, caused by the mass modification of particles in the dense medium formed in d + Au collisions at

\begin{document...

Yong Zhang, Jing Yang and Weihua Wu. Squeezed back-to-back correlations of K ⁺K ⁻in d + Au collisions at

$\begin{document}${\sqrt{{s_{NN}}}}$\end{document}$

=200 GeV and Au + Au collisions at

$\begin{document}${\sqrt{{s_{NN}}}}$\end{document}$

= 62.4 GeV[J]. Chinese Physics C, 2019, 43(7): 074105-1-074105-9. doi: 10.1088/1674-1137/43/7/074105.

A close look at the competition of isovector and isoscalar pairing in A=18 and 20 even-even N≈Z nuclei

Feng Pan, Dan Zhou, Siyu Yang, Grigor Sargsyan, Yingwen He, Kristina D. Launey, Jerry P. Draayer

2019, 43(7): 074106. doi: 10.1088/1674-1137/43/7/074106

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Abstract:
The competition of isovector and isoscalar pairing in A=18 and 20 even-even N≈Z nuclei is analyzed in the framework of the mean-field plus the dynamic quadurpole-quadurpole, pairing and particle-hole interactions, whose Hamiltonian is diagonalized in...

Restoration of pseudo-spin symmetry in N = 32 and N = 34 isotonesdescribed by relativistic Hartree-Fock theory

Zheng-Zheng Li, Shi-Yao Chang, Qiang Zhao, Wen-Hui Long, Yi-Fei Niu

2019, 43(7): 074107. doi: 10.1088/1674-1137/43/7/074107

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Abstract:
The restoration of pseudo-spin symmetry (PSS) along the

$\begin{document}$ N = 32 $\end{document}$

and

$\begin{document}$ N =34 $\end{document}$

isotonic chains and the physics behind are studied by applying the relativistic Hartree-Fock theory with the...

PARTICLE AND NUCLEAR ASTROPHYSICS AND COSMOLOGY

Expected energy spectrum of cosmic ray protons and helium below 4 PeV measured by LHAASO

L. Q. Yin, S. S. Zhang, Z. Cao, B. Y. Bi, C. Wang, J. L. Liu, L. L. Ma, M. J. Yang, Tiina Suomijärvi, Y. Zhang, Z. Y. You, Z. Z. Zong, (for the LHAASO Collaboration)

2019, 43(7): 075001. doi: 10.1088/1674-1137/43/7/075001

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Abstract:
The Large High Altitude Air Shower Observatory (LHAASO) is a composite cosmic ray observatory consisting of three detector arrays: kilometer square array (KM2A), which includes the electromagnetic detector array and muon detector array, water Cherenk...

Lateral distribution of EAS muons measured for the primary cosmic ray energy around 100 TeV

You-Liang Feng, Yi Zhang, Tian-Lu Chen, Yi-Qing Guo, Hong-Bo Hu, Cheng Liu, Guang-Guang Xin, Yu-Hua Yao, Zhen Wang, , Qi Gao, Mao-Yuan Liu, Shi-Ping Zhao, Bing-Qiang Qiao, Ying-Ying Guo, Hui Cai

2019, 43(7): 075002. doi: 10.1088/1674-1137/43/7/075002

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Abstract:
The muonic component of the extensive air showers (EAS) is of great importance for the astroparticle physics. It carries the information about the properties of primary cosmic ray (CR) particles, such as their mass, and electromagnetic and hadronic n...

Non-parametric reconstruction of dark energy and cosmic expansion from the Pantheon compilation of type Ia supernovae

Hai-Nan Lin, Xin Li, Li Tang

2019, 43(7): 075101. doi: 10.1088/1674-1137/43/7/075101

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Abstract:
The equation of state (EoS) of dark energy plays an important role in the evolution of the universe and has attracted considerable interest in the recent years. With the progress in observational technique, a precise constraint on the EoS of dark ene...

The prospects of using gravitational waves for constraining the anisotropy of the Universe

Zhi-Chao Zhao, Hai-Nan Lin, Zhe Chang

2019, 43(7): 075102. doi: 10.1088/1674-1137/43/7/075102

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Abstract:
The observation of GW150914 gave a new independent measurement of the luminosity distance of a gravitational wave event. In this paper, we constrain the anisotropy of the Universe by using gravitational wave events. We simulate hundreds of events of ...

Primordial perturbations and non-gaussianities in Hořava-Lifshitz gravity

Xian Gao

2019, 43(7): 075103. doi: 10.1088/1674-1137/43/7/075103

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Abstract:
We investigate primordial perturbations and non-gaussianities in the Hořava-Lifshitz theory of gravitation. In the UV limit, the scalar perturbation in the Hořava theory is naturally scale-invariant, ignoring the details of the expansion of the Unive...

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