## 2022 Vol. 46, No. 10

Display Method: |

2022, 46(10): 101001. doi: 10.1088/1674-1137/ac76a7

**Abstract:**

We study the properties of gravitational wave (GW) signals produced by first-order phase transitions during the inflation era. We show that the power spectrum of a GW oscillates with its wave number. This signal can be observed directly by future terrestrial and spatial GW detectors and through the B-mode spectrum in the CMB. This oscillatory feature of the GW is generic for any approximately instantaneous sources occurring during inflation and is distinct from the GW from phase transitions after inflation. The details of the GW spectrum contain information about the scale of the phase transition and the later evolution of the universe.

2022, 46(10): 103001. doi: 10.1088/1674-1137/ac7cd8

**Abstract:**

2022, 46(10): 103101. doi: 10.1088/1674-1137/ac763c

**Abstract:**

In this study, we modify a scenario, originally proposed by Grimus and Lavoura, in order to obtain maximal values for the atmospheric mixing angle and

2022, 46(10): 103102. doi: 10.1088/1674-1137/ac78d1

**Abstract:**

*S*–4

*S*, 1

*P*–4

*P*, 1

*D*–3

*D,*and 1

*F*–2

*F*. The Regge trajectory has been investigated for the linear nature based on calculated data along with the magnetic moment. The present work has been compared with various approaches and known experimental findings.

2022, 46(10): 103103. doi: 10.1088/1674-1137/ac79ab

**Abstract:**

New vectorlike quarks have been proposed in many scenarios of new physics beyond the Standard Model, which address the hierarchy problem and may be potentially discovered at the Large Hadron Collider (LHC). Based on a model-independent framework, we propose to search for the vectorlike

*B*-quark (VLQ-

*B*) and focus on resonant production via

*b*-gluon fusion through chromomagnetic interactions. We then explore the possible signals of the VLQ-

*B*through the

2022, 46(10): 103104. doi: 10.1088/1674-1137/ac7a1c

**Abstract:**

The search for an effective reduction method is one of the main topics in higher loop computation. Recently, an alternative reduction method was proposed by Chen in [

2022, 46(10): 103105. doi: 10.1088/1674-1137/ac7c63

**Abstract:**

Because both

*W*-mass and muon

*μ*-

*τ*lepton flavor violation interactions to examine the two anomalies reported by CDF II and FNAL. We obtain the following observations: (i) Combined with theoretical constraints, the CDF

*W*-mass measurement disfavors

*H*or

*A*degenerating in mass with

*H*and

*A*to degenerate. The mass splitting between

*W*-mass, FNAL muon

*τ*decays; however, the mass splittings among extra Higgs bosons are strictly constrained.

2022, 46(10): 103106. doi: 10.1088/1674-1137/ac7cd7

**Abstract:**

In this study, we explore the hadronic coupling constants

2022, 46(10): 103107. doi: 10.1088/1674-1137/ac5dbc

**Abstract:**

In this study, we investigate the QCD chiral phase diagram in the presence of a chiral chemical potential

*q*, which summarizes all possible effects violating the assumptions of Boltzmann-Gibbs (BG) statistics (when

*q*, both the CEP and

*T*and larger chemical potential

*μ*(

*T*,

*μ*,

*q*. Our study may provide useful hints about lattice QCD and relativistic heavy-ion collision experiments.

2022, 46(10): 103108. doi: 10.1088/1674-1137/ac7eb2

**Abstract:**

Heavy Majorana neutrinos beyond the standard model can simultaneously explain the origin of tiny neutrino masses and matter-antimatter asymmetry in our Universe. The existence of heavy Majorana neutrinos will also lead to lepton number violation and confirm the possibility of rare lepton-number-violating

*W*decays. With contributions from two different Majorana neutrinos, nonzero

*CP*asymmetry may be generated from the rate difference between

*W*decay and its

*CP*-conjugate process. The aim of this study is to investigate the prospects of measuring

*CP*violation in rare

*W*decays via Majorana neutrinos at the LHC. Our calculations show that the induced

*CP*asymmetry is independent of the Majorana neutrino mass for

*CP*asymmetry, if observed, would in turn provide unambiguous evidence of new physics beyond the standard model.

2022, 46(10): 104001. doi: 10.1088/1674-1137/ac7a1d

**Abstract:**

The

^{12}C+

^{12}C fusion reaction was studied in the range of

*E*

_{c.m.}=8.9 to 21 MeV using the active-target Time Projection Chamber. With full information on all tracks of the reaction products, cross sections of the

^{12}C(

^{12}C,

^{8}Be)

^{16}O

_{g.s.}channel and the

^{12}C(

^{12}C,3

*α*)

^{12}C channel could be measured down to the level of a few milibarns. The

^{12}C(

^{12}C,

^{8}Be)

^{16}O

_{g.s.}reaction channel was determined to be 10

*E*

_{c.m.}=11.1 MeV, supporting the direct

*α*transfer reaction mechanism. The

^{12}C(

^{12}C,3

*α*)

^{12}C reaction channel was studied for the first time using an exclusive measurement. Our result does not confirm the anomaly behavior reported in the previous inclusive measurement by Kolata

*et al*. [Phys. Rev. C

**21**, 579 (1980)]. Our comparisons with statistical model calculations suggest that the 3

*α*channel is dominated by the fusion evaporation process at

*E*

_{c.m.}> 19 MeV. The additional contribution of the 3

*α*channel increases the fusion reaction cross section by 10% at energies above 20 MeV. We also find that an additional reaction mechanism is needed to explain the measured cross section at

*E*

_{c.m.}< 15 MeV at which point the statistical model prediction vanishes.

2022, 46(10): 104101. doi: 10.1088/1674-1137/ac76a5

**Abstract:**

The energy dependence of the spectral fluctuations in the interacting boson model (IBM) and its connections to the mean-field structures are analyzed by adopting two statistical measures: the nearest neighbor level spacing distribution

*U*(5)-

*SU*(3) and

*SU*(3)-

*O*(6) transitions as well as those near the AW arc of regularity. We observe that most of the changes in spectral fluctuations are triggered near the stationary points of the classical potential, particularly for cases in the deformed region of the IBM phase diagram. Thus, the results justify the stationary point effects from the perspective of statistics. In addition, the approximate degeneracies in the

2022, 46(10): 104102. doi: 10.1088/1674-1137/ac79aa

**Abstract:**

In this study, we investigate the impact of jet quenching on the

*p*+

*p*and central Pb+Pb collisions at

*p*+

*p*collisions. Thus, the nuclear modification ratio of the

2022, 46(10): 104103. doi: 10.1088/1674-1137/ac7a22

**Abstract:**

We study the ground-state properties of the

2022, 46(10): 104104. doi: 10.1088/1674-1137/ac7a99

**Abstract:**

In this study, we systematically investigate the proton radioactivity half-lives of 33 spherical nuclei based on the relationship between Skyrme parameters and the macroscopic quantities of nuclear matter. Using the two-potential approach with the spherical Skyrme-Hartree-Fock model, the correlation between proton radioactivity half-life and the macroscopic quantities is analyzed. Moreover, we obtain a new Skyrme parameter set by fitting the two most weighted macroscopic quantities. Compared with the Skyrme parameters MSL0 and the theoretical model of proton radioactivity UDLP, the theoretical proton radioactivity half-life calculated using the new Skyrme parameter set can better reproduce the experimental data.

2022, 46(10): 104105. doi: 10.1088/1674-1137/ac7b18

**Abstract:**

A relativistic Weizsäcker mass model is proposed based on the single-particle levels and ground state deformations obtained in axial deformed relativistic mean field theory. The density functional of relativistic mean field theory is chosen as DD-LZ1, which can partially remove spurious shell closures. Compared with the fourth Weizsäcker-Skyrme mass model, the proposed model provides shell correction energies that exhibit wide spreading, and the root-mean-square mass deviation is 1.353 MeV. Further improvement is in progress.

2022, 46(10): 104106. doi: 10.1088/1674-1137/ac7b75

**Abstract:**

The production of

*η*, and

*ϕ*in the most central (0%–5%) Xe+Xe collisions at

*η*, and

*ϕ*as functions of the transverse momentum

*η*, and

*ϕ*production coincide with the curve of charged hadron production.

2022, 46(10): 104107. doi: 10.1088/1674-1137/ac7cd9

**Abstract:**

We perform a potential analysis on the holographic Schwinger effect in a rotating deformed AdS black-hole background. We calculate the total potential of a quark-antiquark (

2022, 46(10): 104108. doi: 10.1088/1674-1137/ac7d44

**Abstract:**

We propose and test a new method of estimating the model parameters of the phenomenological Bethe-Weizsäcker mass formula. Based on the Monte Carlo sampling of a large dataset, we obtain, for the first time, a Cauchy-type parameter distribution formed by the exact solutions of linear equation systems. Using the maximum likelihood estimation, the location and scale parameters are evaluated. The estimated results are compared with those obtained by solving overdetermined systems, e.g., the solutions of the traditional least-squares method. Parameter correlations and uncertainty propagation are briefly discussed. As expected, it is also found that improvements in theoretical modeling (e.g., considering microscopic corrections) decrease the parameter and propagation uncertainties.

2022, 46(10): 105101. doi: 10.1088/1674-1137/ac75ca

**Abstract:**

In this study, we construct a non-commutative gauge theory of the modified structure of the gravitational field using the Seiberg-Witten map and the general tetrad fields of Schwarzschild space-time to show that the non-commutative geometry removes the singularity at the origin of the black hole, thus obtaining a non-singular Schwarzschild black hole. The geodetic structure of this black hole presents new types of motion next to the event horizon within stable orbits that are not allowed by the ordinary Schwarzschild spacetime. The noncommutative periastron advance of the Mercury orbit is obtained, and with the available experimental data, we find a parameter of non-commutativity on the order of

2022, 46(10): 105102. doi: 10.1088/1674-1137/ac76a6

**Abstract:**

Using five sets of nucleon coupling constants (DD-MEI, GL85, GL97, GM1, and NL2), we find that the radius of the PNS PSR J0737-3039A is

*R*=15.693–18.846 km, the central baryon density is

*n*,

*p*, Λ,

2022, 46(10): 105103. doi: 10.1088/1674-1137/ac7855

**Abstract:**

In this study, we investigate the quasinormal mode and late-time tail of charged massless scalar perturbations of a black hole in generalized Rastall gravity. The black hole metric in question is spherically symmetric, accompanied by a power-Maxwell field surrounded by a quintessence fluid. We show that the massless scalar field, when

*dressed up*with the magnetic field, acquires an effective mass, which significantly affects the properties of the resultant quasinormal oscillations and late-time tails. Specifically, the quasinormal frequencies become distorted and might even be unstable for particular spacetime configurations. Additionally, the exponent of the usual power-law tail is modified according to the modification in the structure of the branch cut of the retarded Green's function. In particular, as the effective mass is generated dynamically owing to the presence of the magnetic field, we may consider a process through which the field is gradually removed from the spacetime configuration. In this context, while the quasinormal oscillations converge to the case of massless perturbations, we argue that the properties of resultant late-time tails do not fall back to their massless counterpart. The relevant characteristics are investigated using numerical and analytic approaches.

2022, 46(10): 105104. doi: 10.1088/1674-1137/ac7856

**Abstract:**

We investigate tidal forces and geodesic deviation motion in the spacetime of a black hole in a galaxy with a dark matter halo. Our results show that tidal forces and geodesic deviation motion depend on the mass of the dark matter halo and the typical lengthscale of the galaxy. The effect of the typical lengthscale of the galaxy on the tidal force is opposite to that of dark matter mass. With increasing dark matter mass, the radial tidal force increases in the region far from the black hole but decreases in the region near the black hole. Furthermore, the absolute value of angular tidal force monotonously increases with the dark matter halo mass. The angular tidal force also depends on the particle energy, and the effects of dark matter become more distinct for the test particle at higher energies, which differs from the behavior observed in typical static black hole spacetimes. We also present the change in the geodesic deviation vector with dark matter halo mass and the typical lengthscale of a galaxy under two types of initial conditions.

2022, 46(10): 105105. doi: 10.1088/1674-1137/ac7d45

**Abstract:**

In this study, we conduct an investigation on decoupling gravitational sources under the framework of

2022, 46(10): 105106. doi: 10.1088/1674-1137/ac7d46

**Abstract:**

*surfing solution*and is mostly adiabatic before big bang nucleosynthesis (BBN), even properly including the

*kick*by the nonperturbative QCD phase transition, hence a catastrophic consequence claimed in the literature is not applied to this class of DE models. This is due to the presence of the gigantic scale hierarchy between

**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

Author benefits

- A SCOAP3 participating journal - free Open Access publication for qualifying articles
- Average 24 days to first decision
- Fast-track publication for selected articles
- Subscriptions at over 3000 institutions worldwide
- Free English editing on all accepted articles

News

- The 2023 Chinese New Year-Office closure
- 2022 National holiday- office closure
- The 2022 summer holiday-Office closure
- Impact factor of Chinese Physics C is 2.944 in 2021
- The 2022 Labor Day Holiday-Office closure

Meet Editor