## 2023 Vol. 47, No. 5

Display Method: |

2023, 47(5): 051001. doi: 10.1088/1674-1137/acc3f4

**Abstract:**

The yields of

2023, 47(5): 052001. doi: 10.1088/1674-1137/acc1cd

**Abstract:**

On the premise of the importance of energy conditions for regular black holes, we propose a method to remedy those models that break the dominant energy condition, e.g., the Bardeen and Hayward black holes. We modify the metrics but ensure their regularity at the same time, so that the weak, null, and dominant energy conditions are satisfied, with the exception of the strong energy condition. Likewise, we prove a no-go theorem for conformally related regular black holes, which states that the four energy conditions can never be met in this class of black holes. In order to seek evidences for distinguishing regular black holes from singular black holes, we resort to analogue gravity and regard it as a tool to mimic realistic regular black holes in a fluid. The equations of state for the fluid are solved via an asymptotic analysis associated with a numerical method, which provides a modus operandi for experimental observations, in particular, the conditions under which one can simulate realistic regular black holes in the fluid.

2023, 47(5): 052002. doi: 10.1088/1674-1137/acc790

**Abstract:**

Polarized hyperon-antihyperon pairs shed light on various unresolved puzzles in contemporary physics: How the strong interaction confines quarks into hadrons, how accurately the Standard Model describes microcosmos and even why our universe consists of so much more matter than antimatter. Thanks to their weak, parity violating decays, hyperons reveal their spin properties. This can be exploited

*e.g.*the decomposition of the electromagnetic structure of hyperons, precision tests of flavour symmetry and searches for

*CP*violation. At the BESIII experiment at BEPC-II, Beijing, China, hyperon-antihyperon pairs can be produced in abundance. Recently collected large data samples have triggered the development of new methods that provide unprecedented precision and a plethora of new results have emerged. When applied at future high-intensity facilities like PANDA and STCF, precision physics will be taken to a new level which can contribute to the solution to the aforementioned puzzles.

2023, 47(5): 053101. doi: 10.1088/1674-1137/acb7ce

**Abstract:**

*CP*violation in baryonic decays has not been significantly observed. With large data events accumulated at

*CP*symmetry. In this study, we formulate

2023, 47(5): 053102. doi: 10.1088/1674-1137/acbc0e

**Abstract:**

*Z*-boson decay provides a good opportunity to search for the

*Z*-boson decay process

*Z*-boson decay, that is,

*z*distributions and analyze the uncertainties.

2023, 47(5): 053103. doi: 10.1088/1674-1137/acbf2a

**Abstract:**

In this paper, a version of the Polyakov-Nambu-Jona-Lasinio (PNJL) model based on nonextensive statistical mechanics is presented. This new statistics summarizes all possible factors that violate the assumptions of the Boltzmann-Gibbs (BG) statistics to a dimensionless nonextensivity parameter

*q*. Thus, when

*q*tends to 1, it returns to the BG case. Within the nonextensive PNJL model, we found that as

*q*increases, the location of the critical end point (CEP) exhibits non-monotonic behavior. That is, for

*S*), and kurtosis (

*κ*). Our results are generally consistent with the latest experimental data reported, especially for

*q*is set to

2023, 47(5): 053104. doi: 10.1088/1674-1137/acc1cb

**Abstract:**

Owing to the significant difference between the experimental measurements and the theoretical predictions of the standard model (SM) for the value of

*D*-meson twist-2, 3 distribution amplitudes (DAs)

*D*-meson twist-2, 3 DAs

*ξ*

2023, 47(5): 053105. doi: 10.1088/1674-1137/acbf2c

**Abstract:**

We study the mass spectra of

*D*-wave excited

*D*-wave diquark-antidiquark type of

*D*-wave

*D*-wave

*D*-wave

2023, 47(5): 053106. doi: 10.1088/1674-1137/acc1cf

**Abstract:**

In this paper, we present analytical results for one-loop contributions to the decay processes

2023, 47(5): 053107. doi: 10.1088/1674-1137/acc44c

**Abstract:**

In this paper, we propose to investigate the

2023, 47(5): 053108. doi: 10.1088/1674-1137/acc4ab

**Abstract:**

Because the lowest

*t*-channel

*K*exchange diagram. Moreover, the contributions from the

*t*-channel

*s*-channel nucleon pole,

*u*-channel Σ exchange, and contact term are considered. The differential and total cross sections of the process

2023, 47(5): 054001. doi: 10.1088/1674-1137/acb9e2

**Abstract:**

The complete fusion reaction of

*α*

*α*

*α*-particle energy and half-life of

*α*decay properties of

*n*)

*n*)

2023, 47(5): 054002. doi: 10.1088/1674-1137/acbd91

**Abstract:**

In this article, we investigate the dependence of nuclear temperature on emitting source neutron-proton (

2023, 47(5): 054101. doi: 10.1088/1674-1137/acbc0f

**Abstract:**

We treat heavy quark as an open quantum system in a hot medium and rederive the stochastic Schrödinger equation (SSE) from the full Schrödinger equation for both heavy quarks and the medium. We apply the SSE to the dynamical evolutions of a heavy quark (as a system) in the static hot medium (as an environment). Heavy quarks interact with the medium via random scatterings, which exchange the momentum and phase factor randomly between two wave functions of the system and the environment. The exchange of momentum and phase factor results in the transition between different eigenstates of the system. These are included via an external stochastic potential in the Hamiltonian of SSE. Stochastic wave functions of a heavy quark are evolved with the stochastic external potential. The mean wave functions and corresponding momentum distributions of heavy quarks are obtained after the ensemble average over a large set of stochastic wave functions. We present the thermalization of heavy quarks in the static medium with different coupling strengths.

2023, 47(5): 054102. doi: 10.1088/1674-1137/acc1ca

**Abstract:**

The production of vector boson tagged heavy quark jets potentially provides new tools to probe the jet quenching effect. In this paper, we present the first theoretical study on the angular correlations (

*b*-jets in heavy-ion collisions, which was performed using a Monte Carlo transport model. We find that the medium modification of the

*b*-jet has a weaker dependence on

*b*-) jet production, we calculate the momentum imbalance

*b*-jet in Pb+Pb collisions. We observe a smaller

*b*-jet in Pb+Pb collisions relative to those of

2023, 47(5): 054103. doi: 10.1088/1674-1137/acbe2c

**Abstract:**

To study the neutron-induced fission of

*n*,

*f*) with different incident neutron energies, in the framework of time-dependent generator coordinate method (TDGCM). One way to calculate the fission yield of

*n*,

*f*) is to solve the collective equation of the TDGCM by using the PES from the FT-DFT with the corresponding temperature. The other involves using the PES from the zero-temperature DFT and adjusting the initial collective energy of the wave packet in the TDGCM according to the incident neutron energy. For the cases of the lower incident neutron energies, these two methods gave similar results and reproduced the experimental peak and width of fission fragment distribution. However, for the highest incident neutron energy considered in this study, the results from the TDGCM using the PES from zero-temperature DFT deviated explicitly from the experimental data, whereas those obtained by using the PES from FT-DFT remained close to the experimental data. This indicated that, with the increase in the incident neutron energy, the shell structure of the compound nuclei changed explicitly; thus, it may not be effective to use the PES from zero-temperature to perform the fission dynamic calculation.

2023, 47(5): 054104. doi: 10.1088/1674-1137/acc518

**Abstract:**

Deep neural networks (DNNs) and auto differentiation have been widely used in computational physics to solve variational problems. When a DNN is used to represent the wave function and solve quantum many-body problems using variational optimization, various physical constraints have to be injected into the neural network by construction to increase the data and learning efficiency. We build the unitary constraint to the variational wave function using a monotonic neural network to represent the cumulative distribution function (CDF)

2023, 47(5): 055101. doi: 10.1088/1674-1137/acb90f

**Abstract:**

A class of relativistic astrophysical compact objects is analyzed in the modified Finch-Skea geometry described by the MIT bag model equation of state of interior matter,

*B*is known as the bag constant.

*B*plays an important role in determining the physical features and structure of strange stars. We consider the finite mass of the strange quark (

*B*is restricted from 57.55 to

*B*and

2023, 47(5): 055102. doi: 10.1088/1674-1137/acc0f2

**Abstract:**

In this study, we investigate the expansion of the FRLW universe in the open, closed, and flat geometries. The universe is dominated by a scalar field (spatially homogeneous) as a source of dark energy. We consider the three different classes of scalar fields – quintessence, tachyonic, and phantom field – for our analysis. A mathematical analysis is carried out by considering these three scalar fields with exponential and power-law potentials. Both potentials give exponential expansion in the open, closed, and flat FRLW universes. It is found that quintessence, tachyonic, and phantom scalar fields are indistinguishable under the slow roll approximation.

2023, 47(5): 055103. doi: 10.1088/1674-1137/acc1ce

**Abstract:**

We present a novel gravastar model based on the Mazur-Mottola (2004) method with an isotropic matter distribution in

2023, 47(5): 055104. doi: 10.1088/1674-1137/acc649

**Abstract:**

The process of primordial black hole (PBH) formation is inevitably accompanied by scalar induced gravitational waves (SIGWs). The strong correlation between PBH and SIGW signals may offer a promising approach to detecting PBHs in upcoming gravitational wave experiments, such as the Laser Interferometer Space Antenna (LISA). We investigate third order SIGWs during a radiation-dominated era in the case of the monochromatic primordial power spectrum

2023, 47(5): 055105. doi: 10.1088/1674-1137/acc2ad

**Abstract:**

In this study, we investigate the entropies of photons, ideal gas-like dust (baryonic matter), and a special kind of dark energy in the context of cosmology. When these components expand freely with the universe, we calculate the entropy and specific entropy of each component from the perspective of statistics. Under specific assumptions and conditions, the entropies of these components can satisfy the second law of thermodynamics independently. Our calculations show that the specific entropy of matter cannot be a constant during the expansion of the universe, except for photons. When these components interact with the space-time background, particle production (annihilation) can occur. We study the influence of the interaction on the entropies of these components and obtain the conditions guaranteeing that the entropy of each component satisfies the second law of thermodynamics.

2023, 47(5): 055106. doi: 10.1088/1674-1137/acc647

**Abstract:**

The cosmic curvature

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

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

- Particle physics
- Nuclear physics
- Particle and nuclear astrophysics
- Cosmology

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Cover Story

- Cover Story (Issue 4, 2024) | Advancing gravitational wave astronomy: AI-enhanced detection and real-time analysis in the presence of glitches
- Cover Story (Issue 3, 2024) | First measurement of the ground-state mass of 22Al helpsto evaluate the ab-initio theory
- Cover Story (Issue 2, 2024) | Quark/gluon taggers light the way to new physics
- Cover story (Issue 6, 2023) ï½Joint constraints on cosmological parameters using future multi-band gravitational wave standard siren observations
- Cover Story (Issue 5, 2023) | Production and decay of polarized hyperon-antihyperon pairs