## 2021 Vol. 45, No. 10

Display Method: |

2021, 45(10): 101001. doi: 10.1088/1674-1137/ac1b99

**Abstract:**

Based on the relativistic calculations of the nuclear masses in the transfermium region from No

2021, 45(10): 103001. doi: 10.1088/1674-1137/ac1575

**Abstract:**

During the 2016-17 and 2018-19 running periods, the BESIII experiment collected 7.5 fb

2021, 45(10): 103101. doi: 10.1088/1674-1137/ac1577

**Abstract:**

The Inert Doublet Model (IDM) is one of the simplest extensions beyond the Standard Model (SM) with an extended scalar sector, which provides a scalar dark matter particle candidate. In this study, we investigated the double charged Higgs production at a

2021, 45(10): 103102. doi: 10.1088/1674-1137/ac0ee5

**Abstract:**

The analysis of the LHCb data on

Universality of entropy principle for a general diffeomorphism-covariant purely gravitational theory

2021, 45(10): 103103. doi: 10.1088/1674-1137/ac0f72

**Abstract:**

Thermodynamics plays an important role in gravitational theories. It is a principle that is independent of gravitational dynamics, and there is still no rigorous proof to show that it is consistent with the dynamical principle. We consider a self-gravitating perfect fluid system with the general diffeomorphism-covariant purely gravitational theory. Based on the Noether charge method proposed by Iyer and Wald, considering static off/on-shell variational configurations, which satisfy the gravitational constraint equation, we rigorously prove that the extrema of the total entropy of a perfect fluid inside a compact region for a fixed total particle number demands that the static configuration is an on-shell solution after we introduce some appropriate boundary conditions, i.e., it also satisfies the spatial gravitational equations. This means that the entropy principle of the fluid stores the same information as the gravitational equation in a static configuration. Our proof is universal and holds for any diffeomorphism-covariant purely gravitational theories, such as Einstein gravity,

*f*(Gauss-Bonnet) gravity and Einstein-Weyl gravity. Our result indicates the consistency between ordinary thermodynamics and gravitational dynamics.

2021, 45(10): 103104. doi: 10.1088/1674-1137/ac1934

**Abstract:**

In this study, we investigate in detail the generalized Crewther Relation (GCR) between the Adler function (

*D*) and the Gross-Llewellyn Smith sum rules coefficient (

2021, 45(10): 103105. doi: 10.1088/1674-1137/ac1ac4

**Abstract:**

We study the entropic destruction of heavy quarkonium in strongly coupled theories with an anisotropic scaling symmetry in time and a spatial direction. We consider Lifshitz and hyperscaling violation theories, which are covariant under a generalized Lifshitz scaling symmetry with the dynamical exponent

*z*and hyperscaling violation exponent

*z*decreases the entropic force, thus reducing the quarkonium dissociation, while increasing

2021, 45(10): 103106. doi: 10.1088/1674-1137/ac1b97

**Abstract:**

In this study, we investigate the discovery potential of double-charm tetraquarks

2021, 45(10): 104001. doi: 10.1088/1674-1137/ac1100

**Abstract:**

Mix-cumulants of conserved charge distributions are sensitive observables for probing properties of the QCD medium and phase transition in heavy-ion collisions. To perform precise measurements, efficiency correction is one of the most important step. In this study, using the binomial efficiency model, we derive efficiency correction formulas for mutually exclusive and inclusive variables. The UrQMD model is applied to verify the validity of these formulas for different types of correlations. Furthermore, we investigate the effect of the multiplicity loss and contamination emerging from the particle identifications. This study provides important steps toward future measurements of mixed-cumulants in relativistic heavy-ion collisions.

2021, 45(10): 104102. doi: 10.1088/1674-1137/ac1856

**Abstract:**

Using the string melting version of a multiphase transport (AMPT) model, we analyze the transverse momentum dependence of the HBT radius

2021, 45(10): 104102. doi: 10.1088/1674-1137/ac1b96

**Abstract:**

In this study, a phenomenological model is proposed based on Wentzel-Kramers-Brillouin (WKB) theory and applied to investigate the two-proton (

*σ*= 0.736. In addition, we extend this model to predict the half-lives of possible

2021, 45(10): 104103. doi: 10.1088/1674-1137/ac1b98

**Abstract:**

It is proposed that ratios of the sixth order to the second order cumulant (

2021, 45(10): 105101. doi: 10.1088/1674-1137/ac1576

**Abstract:**

The kinematics on spatially flat FLRW spacetimes is presented for the first time in local charts with physical coordinates, i.e., the cosmic time and proper Cartesian space coordinates of Painlevé-type. It is shown that there exists a conserved momentum that determines the form of the covariant four-momentum on geodesics in terms of physical coordinates. Moreover, with the help of this conserved momentum, the peculiar momentum can be defined, thus separating the peculiar and recessional motions without ambiguity. It is shown that the energy and peculiar momentum satisfy the mass-shell condition of special relativity while the recessional momentum does not produce energy. In this framework, the measurements of the kinetic quantities along geodesics performed by different observers are analyzed, pointing out an energy loss of the massive particles similar to that producing the photon redshift. The examples of the kinematics on the de Sitter expanding universe and a new Milne-type spacetime are extensively analyzed.

2021, 45(10): 105102. doi: 10.1088/1674-1137/ac1668

**Abstract:**

We consider the evolution of a black hole involving an

*f*(

*R*) global monopole based on the Extended Uncertainty Principle (EUP). The black hole evolutions refer to the instability due to the Parikh-Kraus-Wilczeck tunneling radiation or fragmentation. It is found that the EUP corrections make the entropy difference larger to encourage the black hole to radiate more significantly. We also show that the appearance of the EUP effects results in the black hole's division. The influence from the global monopole and the revision of general relativity can also adjust the black hole evolution simultaneously but cannot change the final result that the black hole will not be stable because of the EUP's effects.

2021, 45(10): 105103. doi: 10.1088/1674-1137/ac0f73

**Abstract:**

The observed rotation curves of low surface brightness (LSB) galaxies play an essential role in studying dark matter, and indicate the existence of a central constant density dark matter core. However, the cosmological

*N*-body simulations of cold dark matter predict an inner cusped halo with a power-law mass density distribution, and cannot reproduce a central constant-density core. This phenomenon is called cusp-core problem. When dark matter is quiescent and satisfies the condition for hydrostatic equilibrium, the equation of state can be adopted to obtain the density profile in the static and spherically symmetric space-time. To address the cusp-core problem, we assume that the equation of state is independent of the scaling transformation. Its lower order approximation for this type of equation of state can naturally lead to a special case, i.e.,

*p*and

*s*and

2021, 45(10): 105104. doi: 10.1088/1674-1137/ac1064

**Abstract:**

The diffusive halo is a basic characteristic of cosmic ray (CR) propagation and can advance our understanding of many CR-related phenomena and indirect dark matter. The method used to derive the halo size often has degeneracy problems and is thus affected by large uncertainties. The diffuse

2021, 45(10): 105105. doi: 10.1088/1674-1137/ac1166

**Abstract:**

The tiny modification of dispersion relation induced by Lorentz violation (LV) is an essential topic in quantum gravity (QG) theories, which can be magnified into significant effects when dealing with astrophysical observations at high energies and long propagation distances. LV would lead to photon decay at high energies; therefore, observations of high-energy photons could constrain LV or even QG theories. The Large High Altitude Air Shower Observatory (LHAASO) is the most sensitive gamma-array instrument currently operating above 100 TeV. Recently, LHAASO reported the detection of 12 sources above 100 TeV with maximum photon energy exceeding 1 PeV. According to these observations, the most stringent restriction is achieved in this study, i.e., limiting the LV energy scale to

2021, 45(10): 105106. doi: 10.1088/1674-1137/ac125f

**Abstract:**

The dynamic phase transition of charged dilaton black holes is investigated in this paper. The Gibbs free energy landscape is introduced, and the corresponding

*t*). Moreover, the time corresponding to the single peak of the first passage time distribution is found to increase with the parameter

**ISSN** 1674-1137 **CN** 11-5641/O4

Original research articles, Ietters and reviews Covering theory and experiments in the fieids of

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- Cosmology

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