## 2024 Vol. 48, No. 4

Display Method: |

2024, 48(4): 041001. doi: 10.1088/1674-1137/ad2361

**Abstract:**

The attractive interaction between

*s*-channel partial wave amplitude in the vicinity of

2024, 48(4): 043001. doi: 10.1088/1674-1137/ad20d5

**Abstract:**

In this study, we conducted a search for dark matter using a part of the data recorded by the CMS experiment during run-I of the LHC in 2012 with a center of mass energy of 8 TeV and an integrated luminosity of 11.6 fb

^{−1}. These data were gathered from the CMS open data. Dark matter, in the framework of the simplified model (mono-

*Z*

*Z*

*Z*

*Z*

2024, 48(4): 043002. doi: 10.1088/1674-1137/ad1fe6

**Abstract:**

Luminosity monitoring at

*Z*boson resonance and at 240 GeV for the conditions of typical luminosity detectors. It is shown that bremsstrahlung events with extremely low electron scattering angles are relevant to match the precision tags of future electron-positron colliders.

2024, 48(4): 043003. doi: 10.1088/1674-1137/ad2675

**Abstract:**

In this study, the possibility of observing a solar neutrino background in a future neutrinoless double beta decay experiment using a high-pressure gaseous

^{82}SeF

_{6}TPC is investigated. Various contributions are simulated, and possible features that could be used for event classification are discussed; two types of backgrounds are identified. The rate of multi-site background events is approximately 0.63 events/(ton·yr) in a 30 keV ROI window. This background could be effectively reduced to less than 0.0001 events/(ton·yr) (95% C.L.) while maintaining a high signal efficiency of 93% by applying a selection based on the number of clusters and energy of the leading cluster. The rate of the single-electron background events is approximately 0.01 events/(ton·yr) in the ROI. Assuming a reduction factor of 10 for the single-electron background events obtained via the algorithms developed for radioactive background rejection, the total background induced by the solar neutrino would be 0.001 events/(ton·yr), which is sufficiently small for conducting ton-level experiments.

2024, 48(4): 043101. doi: 10.1088/1674-1137/ad17b0

**Abstract:**

The leptonic di-flavor violation (LFV) processes

2024, 48(4): 043102. doi: 10.1088/1674-1137/ad1a0b

**Abstract:**

Recently, the LHCb experimental group found an exotic state

*K*-matrix unitarization and a single-channel Flatté-like parametrization method analyzed utilizing the pole counting rule and spectral density function sum rule. These analyses demonstrated that

2024, 48(4): 043103. doi: 10.1088/1674-1137/ad25f5

**Abstract:**

We investigate the possibility of detecting the leptophilic gauge boson

2024, 48(4): 043104. doi: 10.1088/1674-1137/ad205f

**Abstract:**

Employing a 4-form ansatz of 11-dimensional supergravity over a non-dynamical

2024, 48(4): 043105. doi: 10.1088/1674-1137/ad243e

**Abstract:**

In this study, we reanalyze the top-quark pair production at next-to-next-to-leading order (NNLO) in quantum chromodynamics (QCD) at future

*β*terms by recursively using the Renormalization Group Equation (RGE). Unlike the conventional scale-setting method of fixing the scale at the center-of-mass energy

*K*for conventional results is

*K*is improved to

2024, 48(4): 044001. doi: 10.1088/1674-1137/ad243f

**Abstract:**

Baryon numbers are theorized to be carried by valence quarks in the standard QCD picture of the baryon structure. Another theory proposed an alternative baryon number carrier, a non-perturbative Y-shaped configuration of the gluon field, called the baryon junction in the 1970s. However, neither of these theories has been verified experimentally. Recently, searching for the baryon junction by investigating the correlation of net-charge and net-baryon yields at midrapidity in heavy-ion collisions has been suggested. This paper presents studies of such correlations in collisions of various heavy ions from oxygen to uranium with the UrQMD Monte Carlo model. The UrQMD model implements valence quark transport as the primary means of charge and baryon stopping at midrapidity. Detailed studies are also conducted for isobaric

2024, 48(4): 044101. doi: 10.1088/1674-1137/ad20d4

**Abstract:**

The influence of the tensor interaction of nucleons on the characteristics of neutron-rich silicon and nickel isotopes was studied in this work. Tensor forces are considered within the framework of the Hartree-Fock approach with the Skyrme interaction. The addition of a tensor component of interaction is shown to improve the description of the splittings between different single-particle states and decrease nucleon-nucleon pairing correlations in silicon and nickel nuclei. Special attention was directed toward the role of isovector tensor forces relevant to the interaction of like nucleons.

2024, 48(4): 044102. doi: 10.1088/1674-1137/ad243d

**Abstract:**

In this study, proton emission half-lives were investigated for deformed proton emitters with

*l*for

^{117}La,

^{121}Pr,

^{135}Tb, and

^{141}Ho were analyzed, and the corresponding possible values of

*l*were proposed:

*l*= 3, 3, 4, 4.

2024, 48(4): 044103. doi: 10.1088/1674-1137/ad1fe3

**Abstract:**

This study explores the ground-state characteristics of neutron-rich sodium isotopes, encompassing two-neutron separation energies, root-mean-square radii, quadrupole moments of proton and neutron distributions, single-particle levels of bound and resonant states, and neutron density distributions and shapes. Simultaneously, special attention is paid to the distinctive physical phenomena associated with these isotopes. The deformed relativistic mean field theory in complex momentum representations with BCS pairings (DRMF-CMR-BCS) employed in our research provides resonant states with real physics, offering insights into deformed halo nuclei. Four effective interactions (NL3, NL3

^{*}, PK1, and NLSH) were considered to assess the influence of continuum and deformation effects on halo structures. Calculations for odd-even nuclei

^{35–43}Na revealed the dependence on the chosen effective interaction and number of considered resonant states. Neutron occupation patterns near the Fermi surface, particularly in orbitals

2024, 48(4): 044104. doi: 10.1088/1674-1137/ad1fe7

**Abstract:**

We study radiative

^{16}O at stellar energies within the framework of a modified potential cluster model (MPCM) with forbidden states, including low-lying resonances. The investigation of the

^{15}N(

^{16}O reaction includes the consideration of

*p*+

^{15}N channel due to the

*S*-factor, and the extrapolated

^{15}N(

^{16}O process with interfering

*S*-factor with existing experimental and theoretical data is addressed, and a reasonable agreement is found. The reaction rate is calculated and compared with the existing rates. It has negligible dependence on the variation of AC but shows a strong impact of the interference of

^{12}N(

^{13}O,

^{13}N(

^{14}O,

^{14}N(

^{15}O, and

^{15}N(

^{16}O obtained in the framework of the MPCM and provide the temperature windows, prevalence, and significance of each process.

2024, 48(4): 044105. doi: 10.1088/1674-1137/ad21e9

**Abstract:**

In this study,

*α*-particle preformation factors in heavy and superheavy nuclei from

^{220}Th to

^{294}Og are investigated. By combing experimental

*α*decay energies and half-lives, the

*α*-particle preformation factors

*α*decay half-lives calculated using the Two-Potential Approach (TPA) and experimental data. We find that the

*α*-particle preformation factors exhibit a noticeable odd-even staggering behavior, and unpaired nucleons inhibit

*α*-particle preformation. Moreover, we find that both the

*α*decay energy and mass number of parent nucleus exhibit considerable regularity with the extracted experimental

*α*-particle preformation factors. After considering the major physical factors, we propose a local phenomenological formula with only five valid parameters for

*α*-particle preformation factors

*α*-particle preformation factors and further predict the

*α*decay half-lives for unknown even-even nuclei with

*Z*= 118 and 120.

2024, 48(4): 045101. doi: 10.1088/1674-1137/ad1cda

**Abstract:**

Cosmic rays can interact with the solar atmosphere and produce a slew of secondary messengers, making the Sun a bright gamma-ray source in the sky. Detailed observations with Fermi-LAT have shown that these interactions must be strongly affected by solar magnetic fields in order to produce a wide range of observational features, such as a high flux and hard spectrum. However, the detailed mechanisms behind these features are still a mystery. In this study, we tackle this problem by performing particle-interaction simulations in the solar atmosphere in the presence of coronal magnetic fields using the potential field source surface (PFSS) model. We find that low-energy (~ GeV) gamma-ray production is significantly enhanced by the coronal magnetic fields, but the enhancement decreases rapidly with energy. The enhancement directly correlates with the production of gamma rays with large deviation angles relative to the input cosmic-ray direction. We conclude that coronal magnetic fields are essential for correctly modeling solar disk gamma rays below 10 GeV, but above that, the effect of coronal magnetic fields diminishes. Other magnetic field structures are needed to explain the high-energy disk emission.

2024, 48(4): 045102. doi: 10.1088/1674-1137/ad1feb

**Abstract:**

In this study, we investigated the astronomical implications of Rastall gravity, particularly its behavior amidst a radiation field compared to Reissner-Nordström (RN) black holes. We found a crucial correlation between the dynamics of the accretion disk and the parameters

*Q*and

*Q*causes contraction in the disk’s orbit due to enhanced gravitational effects, while higher

2024, 48(4): 045103. doi: 10.1088/1674-1137/ad1b3c

**Abstract:**

The CNO cycle is the main source of energy in stars more massive than our Sun. This process defines the energy production, the duration of which can be used to determine the lifetime of massive stars. The cycle is an important tool for determining the age of globular clusters. Radiative proton capture via

*R*-matrix method to describe the ongoing reactions via

*S*-factor are calculated for all possible electric and magnetic dipole transitions in

^{15}O. The linear extrapolated

*S*-factor at zero energy (

*S*(0)) agrees well with earlier reported values for all transition types considered in this work. Based on the value of the total astrophysical

*S*-factor, depending on the collision energy, we calculate the nuclear reaction rates for

2024, 48(4): 045104. doi: 10.1088/1674-1137/ad1dcd

**Abstract:**

In this paper, we propose a hybrid metric Palatini approach in which the Palatini scalar curvature is non minimally coupled to the scalar field. We derive Einstein's field equations, i.e., the equations of motion of the scalar field. Furthermore, the background and perturbative parameters are obtained by means of Friedmann equations in the slow roll regime. The analysis of cosmological perturbations allowed us to obtain the main inflationary parameters, e.g., the scalar spectral index

*r*. From this perspective, as an application of our analysis, we consider the Higgs field with quartic potential, which plays the inflaton role, and show that predictions of Higgs hybrid inflation are in good agreement with recent observational data [Astron. Astrophys. 641, 61 (2020)].

2024, 48(4): 045105. doi: 10.1088/1674-1137/ad2360

**Abstract:**

In this paper, we present several explicit reconstructions for the aether scalar tensor (AeST) theory derived from the background of the Friedmann-Lemaître-Robertson-Walker cosmological evolution. It is shown that the Einstein-Hilbert Lagrangian with a positive cosmological constant is the only Lagrangian capable of accurately replicating the exact expansion history of the Λ cold dark matter (ΛCDM) universe filled solely with dust-like matter. However, the ΛCDM-era can be produced within the framework of the AeST theory for some other fluids, including a perfect fluid with

2024, 48(4): 045106. doi: 10.1088/1674-1137/ad2b4f

**Abstract:**

We discuss the gravitational wave (GW) spectra predicted from the electroweak scalegenesis of the Higgs portal type with a large number of dark chiral flavors, which many flavor QCD would underlie and give the dynamical explanation of the negative Higgs portal coupling required to trigger the electroweak symmetry breaking. We employ the linear-sigma model as the low-energy description of dark many flavor QCD and show that the model undergoes ultra-supercooling due to the produced strong first-order thermal phase transition along the (approximately realized) flat direction based on the Gildener-Weinberg mechanism. Passing through evaluation of the bubble nucleation/percolation, we address the reheating and relaxation processes, which are generically non-thermal and nonadiabatic. Parametrizing the reheating epoch in terms of the e-folding number, we propose proper formulae for the redshift effects on the GW frequencies and signal spectra. It then turns out that the ultra-supercooling predicted from the Higgs-portal scalegenesis generically yields none of GW signals with the frequencies as low as nano Hz, unless the released latent heat is transported into another sector other than reheating the universe. Instead, models of this class prefer to give the higher frequency signals and still keeps the future prospected detection sensitivity, like at LISA, BBO, and DECIGO, etc. We also find that with large flavors in the dark sector, the GW signals are made further smaller and the peak frequencies higher. Characteristic phenomenological consequences related to the multiple chiral scalars include the prediction of dark pions with the mass much less than TeV scale, which is also briefly addressed.

2024, 48(4): 045107. doi: 10.1088/1674-1137/ad260a

**Abstract:**

The study of Kerr geodesics has a long history, particularly for those occurring within the equatorial plane, which are generally well-understood. However, when compared with the classification introduced by one of the authors [Phys. Rev. D 105, 024075 (2022)], it becomes apparent that certain classes of geodesics, such as trapped orbits, still lack analytical solutions. Thus, in this study, we provide explicit analytical solutions for equatorial timelike geodesics in Kerr spacetime, including solutions of trapped orbits, which capture the characteristics of special geodesics, such as the positions and conserved quantities of circular, bound, and deflecting orbits. Specifically, we determine the precise location at which retrograde orbits undergo a transition from counter-rotating to prograde motion due to the strong gravitational effects near a rotating black hole. Interestingly, the trajectory remains prograde for orbits with negative energy despite the negative angular momentum. Furthermore, we investigate the intriguing phenomenon of deflecting orbits exhibiting an increased number of revolutions around the black hole as the turning point approaches the turning point of the trapped orbit. Additionally, we find that only prograde marginal deflecting geodesics are capable of traversing through the ergoregion. In summary, our findings present explicit solutions for equatorial timelike geodesics and offer insights into the dynamics of particle motion in the vicinity of a rotating black hole.

2024, 48(4): 045108. doi: 10.1088/1674-1137/ad2a5f

**Abstract:**

Glitches represent a category of non-Gaussian and transient noise that frequently intersects with gravitational wave (GW) signals, thereby exerting a notable impact on the processing of GW data. The inference of GW parameters, crucial for GW astronomy research, is particularly susceptible to such interference. In this study, we pioneer the utilization of a temporal and time-spectral fusion normalizing flow for likelihood-free inference of GW parameters, seamlessly integrating the high temporal resolution of the time domain with the frequency separation characteristics of both time and frequency domains. Remarkably, our findings indicate that the accuracy of this inference method is comparable to that of traditional non-glitch sampling techniques. Furthermore, our approach exhibits a greater efficiency, boasting processing times on the order of milliseconds. In conclusion, the application of a normalizing flow emerges as pivotal in handling GW signals affected by transient noises, offering a promising avenue for enhancing the field of GW astronomy research.

**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