2023 Vol. 47, No. 9
Display Method: |
2023, 47(9): 093001. doi: 10.1088/1674-1137/ace9c8
Abstract:
A first search for the\begin{document}$ \varXi_{bc}^+ \to J/\psi \varXi_c^+ $\end{document} ![]()
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\begin{document}$ 4.3\,(2.8) $\end{document} ![]()
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\begin{document}$ 4.1\,(2.4) $\end{document} ![]()
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\begin{document}$c^2$\end{document} ![]()
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\begin{document}$\varXi_{bc}^+$\end{document} ![]()
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\begin{document}$B_{c}^{+} \rightarrow J / \psi D_{s}^{+}$\end{document} ![]()
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\begin{document}$ \varXi_{bc}^+ $\end{document} ![]()
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\begin{document}$ B_{c}^{+} $\end{document} ![]()
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\begin{document}$ 20\;{\rm{GeV}} /{c} $\end{document} ![]()
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\begin{document}$ \varXi_{bc}^+ $\end{document} ![]()
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A first search for the
2023, 47(9): 093002. doi: 10.1088/1674-1137/aceae9
Abstract:
A search for the rare decays\begin{document}$W^{+} \rightarrow D_s^{+} \gamma$\end{document} ![]()
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\begin{document}$Z \rightarrow D^0 \gamma$\end{document} ![]()
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\begin{document}$\mathrm{TeV}$\end{document} ![]()
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\begin{document}$\mathrm{fb}^{-1}$\end{document} ![]()
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\begin{document}$W^{+} \rightarrow \mu^{+} \nu$\end{document} ![]()
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\begin{document}$Z \rightarrow \mu^{+} \mu^{-}$\end{document} ![]()
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\begin{document}${{{6.5\times 10^{-4}}}}$\end{document} ![]()
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\begin{document}${{{2.1\times 10^{-3}}}}$\end{document} ![]()
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\begin{document}$W^{+} \rightarrow D_s^{+} \gamma$\end{document} ![]()
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\begin{document}$Z \rightarrow D^0 \gamma$\end{document} ![]()
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\begin{document}$Z \rightarrow D^0 \gamma$\end{document} ![]()
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\begin{document}$W^{+} \rightarrow D_s^{+} \gamma$\end{document} ![]()
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A search for the rare decays
2023, 47(9): 093101. doi: 10.1088/1674-1137/ace17e
Abstract:
We investigate the spin density matrix of\begin{document}$ \Omega^{-} $\end{document} ![]()
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\begin{document}$ e^{+}e^{-} $\end{document} ![]()
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\begin{document}$e^{+}e^{-}\rightarrow \psi(3686)\rightarrow $\end{document} ![]()
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\begin{document}$ \Omega^{-}\bar{\Omega}^{+}$\end{document} ![]()
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\begin{document}$ \Omega^{-} $\end{document} ![]()
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\begin{document}$ \Omega^{-} $\end{document} ![]()
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\begin{document}$ e^+e^-\rightarrow \Omega^-\bar{\Omega}^+ $\end{document} ![]()
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We investigate the spin density matrix of
2023, 47(9): 093102. doi: 10.1088/1674-1137/ace312
Abstract:
In this paper, we propose a map that connects nucleons bound in nuclei and Ising spins in the Ising model. This proposal is based on the fact that the description of states of nucleons and Ising spins could share the same type of observables. We present a nuclear model corresponding to an explicit modified Ising model and qualitatively confirm the correctness of this map with a simulation on a two-dimensional square lattice. This map can help us understand the profound connections between different physical systems.
In this paper, we propose a map that connects nucleons bound in nuclei and Ising spins in the Ising model. This proposal is based on the fact that the description of states of nucleons and Ising spins could share the same type of observables. We present a nuclear model corresponding to an explicit modified Ising model and qualitatively confirm the correctness of this map with a simulation on a two-dimensional square lattice. This map can help us understand the profound connections between different physical systems.
2023, 47(9): 093103. doi: 10.1088/1674-1137/ace354
Abstract:
The measurement of decay parameters is one of the important goals of particle physics experiments, and the measurement serves as a probe to search for evidence of CP violation in baryonic decays. The experimental results will aid in advancing existing theoretical research and establishing new experimental objectives. In this study, we formulate the asymmetric parameters that characterize parity violation, and then derive formulas for the measurement of CP violation. The formulae for the joint angular distribution of the full decay chain as well as the polarization observable of\begin{document}$ \Xi ^ 0 $\end{document} ![]()
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\begin{document}$ \bar { \Xi } ^ 0 $\end{document} ![]()
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\begin{document}$ \bar { \Lambda } $\end{document} ![]()
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\begin{document}$ \alpha _ { \Xi ^ 0 \to \Lambda \pi ^ 0 } $\end{document} ![]()
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\begin{document}$ \alpha _ { \Xi ^ 0 } $\end{document} ![]()
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\begin{document}$\alpha _ { \bar { \Xi } ^ 0 \to \bar { \Lambda } \gamma }$\end{document} ![]()
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\begin{document}$ \alpha_ {{\bar{\Xi}}^0 } $\end{document} ![]()
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The measurement of decay parameters is one of the important goals of particle physics experiments, and the measurement serves as a probe to search for evidence of CP violation in baryonic decays. The experimental results will aid in advancing existing theoretical research and establishing new experimental objectives. In this study, we formulate the asymmetric parameters that characterize parity violation, and then derive formulas for the measurement of CP violation. The formulae for the joint angular distribution of the full decay chain as well as the polarization observable of
2023, 47(9): 093104. doi: 10.1088/1674-1137/ace708
Abstract:
Type II seesaw leptogenesis simultaneously explains the origin of neutrino masses, the baryon asymmetry of our universe, and inflation. The Large Hadron Collider (LHC) provides an opportunity to directly test type II seesaw leptogenesis by looking for the predicted triplet Higgs. In this paper, we perform an analysis of the detection prospect for the triplet Higgs at the LHC through multi-electron channels. We find that due to the contribution of the\begin{document}$pp\to H^{\pm \pm }H^{\mp }$\end{document} ![]()
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\begin{document}$3e+ {E}^{\rm miss}_{T}$\end{document} ![]()
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\begin{document}$pp\to H^{\pm \pm }H^{\mp }$\end{document} ![]()
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\begin{document}$2\sigma$\end{document} ![]()
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Type II seesaw leptogenesis simultaneously explains the origin of neutrino masses, the baryon asymmetry of our universe, and inflation. The Large Hadron Collider (LHC) provides an opportunity to directly test type II seesaw leptogenesis by looking for the predicted triplet Higgs. In this paper, we perform an analysis of the detection prospect for the triplet Higgs at the LHC through multi-electron channels. We find that due to the contribution of the
2023, 47(9): 093105. doi: 10.1088/1674-1137/ace521
Abstract:
We perform a complete study of\begin{document}$ J/\psi $\end{document} ![]()
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\begin{document}$ c\bar{c} $\end{document} ![]()
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\begin{document}$ {}^{3}S_1^{[1]} $\end{document} ![]()
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\begin{document}$ {}^{1}S_0^{[8]} $\end{document} ![]()
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\begin{document}$ {}^{1}S_0^{[8]} $\end{document} ![]()
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\begin{document}$ J/\psi $\end{document} ![]()
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We perform a complete study of
2023, 47(9): 093106. doi: 10.1088/1674-1137/ace81f
Abstract:
Our study focuses on the Λ-type P-wave bottom baryon states with spin-parity\begin{document}$J^P={1}/{2}^-$\end{document} ![]()
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\begin{document}${3}/{2}^-$\end{document} ![]()
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\begin{document}$\Lambda_b$\end{document} ![]()
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\begin{document}$\Xi_b$\end{document} ![]()
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\begin{document}$\Xi_b(6087)$\end{document} ![]()
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\begin{document}$\Xi_b(6095/6100)$\end{document} ![]()
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\begin{document}$J^P={1}/{2}^-$\end{document} ![]()
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\begin{document}${3}/{2}^-$\end{document} ![]()
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\begin{document}$\Lambda_b(5912)$\end{document} ![]()
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\begin{document}$\Lambda_b(5920)$\end{document} ![]()
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\begin{document}$J^P={1}/{2}^-$\end{document} ![]()
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\begin{document}${3}/{2}^-$\end{document} ![]()
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\begin{document}$\Lambda_b(5920)$\end{document} ![]()
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\begin{document}$\Xi_b(6095/6100)$\end{document} ![]()
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Our study focuses on the Λ-type P-wave bottom baryon states with spin-parity
2023, 47(9): 094001. doi: 10.1088/1674-1137/ace313
Abstract:
The cross-sections of the 127I (n, 2n) 126I and 133Cs (n, 2n) 132Cs reactions at neutron energies of 13.83 ± 0.05, 14.33 ± 0.10, and 14.79 ± 0.10 MeV were measured relative to the 93Nb (n, 2n) 92mNb reaction using the activation technique in combination with off-line γ-ray spectrometry. A neutron beam was generated from the T (d, n) 4He reaction using the K-400 neutron generator at the China Academy of Engineering Physics. Considering the correlations between different attributes, detailed uncertainty propagation was performed using covariance analysis, and the cross-sections were reported with their uncertainties and correlation matrix. The uncertainty of the measurement cross-sections ranged from 4.84 to 5.90%, which is lower than previous experimental data. Furthermore, the theoretical excitation functions of the 127I (n, 2n) 126I and 133Cs (n, 2n) 132Cs reactions were calculated using the TALYS-1.95 and EMPIRE-3.2.3 codes. Then, the experimentally determined cross-sections were analyzed by comparing them with literature data available in the EXFOR database and evaluated nuclear data in the ENDF/B-VIII.0, JEFF-3.3, JENDL-5, BROND-3.1, CENDL-3.2, and TENDL-2021 databases. Compared with the values previously reported in the 13.8-14.8 MeV energy region, the precision of the results obtained in this study was greatly improved. The current experimental results with thorough uncertainties and covariance information are critical for verifying the reliability of the theoretical model and improving the quality of the nuclear database.
The cross-sections of the 127I (n, 2n) 126I and 133Cs (n, 2n) 132Cs reactions at neutron energies of 13.83 ± 0.05, 14.33 ± 0.10, and 14.79 ± 0.10 MeV were measured relative to the 93Nb (n, 2n) 92mNb reaction using the activation technique in combination with off-line γ-ray spectrometry. A neutron beam was generated from the T (d, n) 4He reaction using the K-400 neutron generator at the China Academy of Engineering Physics. Considering the correlations between different attributes, detailed uncertainty propagation was performed using covariance analysis, and the cross-sections were reported with their uncertainties and correlation matrix. The uncertainty of the measurement cross-sections ranged from 4.84 to 5.90%, which is lower than previous experimental data. Furthermore, the theoretical excitation functions of the 127I (n, 2n) 126I and 133Cs (n, 2n) 132Cs reactions were calculated using the TALYS-1.95 and EMPIRE-3.2.3 codes. Then, the experimentally determined cross-sections were analyzed by comparing them with literature data available in the EXFOR database and evaluated nuclear data in the ENDF/B-VIII.0, JEFF-3.3, JENDL-5, BROND-3.1, CENDL-3.2, and TENDL-2021 databases. Compared with the values previously reported in the 13.8-14.8 MeV energy region, the precision of the results obtained in this study was greatly improved. The current experimental results with thorough uncertainties and covariance information are critical for verifying the reliability of the theoretical model and improving the quality of the nuclear database.
2023, 47(9): 094101. doi: 10.1088/1674-1137/ace680
Abstract:
Through systematic investigations using the axially deformed solutions of the Skyrme-Hartree-Fock-Bogoliubov equations with 132 sets of Skyrme interaction parameters, it is confirmed that the neutron-skin thickness (\begin{document}$ S_{n} $\end{document} ![]()
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\begin{document}$ R_{p}^{\rm mir} $\end{document} ![]()
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\begin{document}$ S_{n} $\end{document} ![]()
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\begin{document}$ R_{p}^{\rm mir} $\end{document} ![]()
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\begin{document}$ S_{n} $\end{document} ![]()
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\begin{document}$ R_{p}^{\rm mir} $\end{document} ![]()
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\begin{document}$ N=20 $\end{document} ![]()
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\begin{document}$ N=28 $\end{document} ![]()
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\begin{document}$ |N-Z| $\end{document} ![]()
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Through systematic investigations using the axially deformed solutions of the Skyrme-Hartree-Fock-Bogoliubov equations with 132 sets of Skyrme interaction parameters, it is confirmed that the neutron-skin thickness (
2023, 47(9): 094102. doi: 10.1088/1674-1137/ace9c7
Abstract:
We study multi-skyrmion states using the Skyrme model with a false vacuum potential up to baryon number\begin{document}$ B=8 $\end{document} ![]()
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We study multi-skyrmion states using the Skyrme model with a false vacuum potential up to baryon number
2023, 47(9): 094103. doi: 10.1088/1674-1137/ace351
Abstract:
In this study, based on Wentzel-Kramers-Brillouin theory, we systematically investigate the cluster radioactivity half-lives of 22 nuclei ranging from\begin{document}$ ^{221} {{\rm{Fr}}}$\end{document} ![]()
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\begin{document}$^{242} {{\rm{Cm }}}$\end{document} ![]()
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In this study, based on Wentzel-Kramers-Brillouin theory, we systematically investigate the cluster radioactivity half-lives of 22 nuclei ranging from
2023, 47(9): 095001. doi: 10.1088/1674-1137/ace3ac
Abstract:
The observation of short gamma ray bursts (SGRBs) in the TeV energy range plays an important role in understanding the radiation mechanism and probing potential new physics, such as Lorentz invariance violation (LIV). However, no SGRBs have been observed in this energy range owing to the short duration of SGRBs and the weakness of current experiments. New experiments with new technology are required to detect the very high energy (VHE) emission of SGRBs. In this study, we simulate the VHE γ-ray emissions from SGRBs and calculate the annual detection rate with the High Altitude Detection of Astronomical Radiation (HADAR) experiment. First, a set of pseudo-SGRB samples is generated and checked using the observations of the Fermi-GBM, Fermi-LAT, and Swift-BAT measurements. The annual detection rate is calculated from these SGRB samples based on the performance of the HADAR instrument. As a result, the HADAR experiment can detect 0.5 SGRBs per year if the spectral break-off of γ-rays caused by the internal absorption and Klein-Nishina (KN) effect is larger than 100 GeV. For a GRB090510-like GRB in HADAR's view, it should be possible to detect approximately 2000 photons considering the internal absorption and KN effect. With a time delay assumption due to LIV effects, a simulated light curve of GRB090510 has evident energy dependence. We hope that the HADAR experiment can perform SGRB observations and test our calculations in the future.
The observation of short gamma ray bursts (SGRBs) in the TeV energy range plays an important role in understanding the radiation mechanism and probing potential new physics, such as Lorentz invariance violation (LIV). However, no SGRBs have been observed in this energy range owing to the short duration of SGRBs and the weakness of current experiments. New experiments with new technology are required to detect the very high energy (VHE) emission of SGRBs. In this study, we simulate the VHE γ-ray emissions from SGRBs and calculate the annual detection rate with the High Altitude Detection of Astronomical Radiation (HADAR) experiment. First, a set of pseudo-SGRB samples is generated and checked using the observations of the Fermi-GBM, Fermi-LAT, and Swift-BAT measurements. The annual detection rate is calculated from these SGRB samples based on the performance of the HADAR instrument. As a result, the HADAR experiment can detect 0.5 SGRBs per year if the spectral break-off of γ-rays caused by the internal absorption and Klein-Nishina (KN) effect is larger than 100 GeV. For a GRB090510-like GRB in HADAR's view, it should be possible to detect approximately 2000 photons considering the internal absorption and KN effect. With a time delay assumption due to LIV effects, a simulated light curve of GRB090510 has evident energy dependence. We hope that the HADAR experiment can perform SGRB observations and test our calculations in the future.
2023, 47(9): 095101. doi: 10.1088/1674-1137/ace17f
Abstract:
The first measurement of the temperature of the hydrogen 21-cm signal reported by EDGES strongly favors the Coulomb-like interaction between freeze-in dark matter and baryon fluid. We investigate such dark matter in both the one- and two-component context with the light force carrier(s) essential for the Coulomb-like interaction being other than photons. Using a conversion of cross sections used by relevant experiments and Boltzmann equations to encode the effects of the dark matter-baryon interaction, we show that both cases are robustly excluded by the stringent stellar cooling bounds in the sub-GeV dark matter mass range. The exclusion of the one-component case applies to simplified freeze-in dark matter with the light force carrier as dark photons, gauged\begin{document}$ B-L $\end{document} ![]()
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\begin{document}$ L_{e}-L_{\mu} $\end{document} ![]()
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\begin{document}$ L_{e}-L_{\tau} $\end{document} ![]()
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The first measurement of the temperature of the hydrogen 21-cm signal reported by EDGES strongly favors the Coulomb-like interaction between freeze-in dark matter and baryon fluid. We investigate such dark matter in both the one- and two-component context with the light force carrier(s) essential for the Coulomb-like interaction being other than photons. Using a conversion of cross sections used by relevant experiments and Boltzmann equations to encode the effects of the dark matter-baryon interaction, we show that both cases are robustly excluded by the stringent stellar cooling bounds in the sub-GeV dark matter mass range. The exclusion of the one-component case applies to simplified freeze-in dark matter with the light force carrier as dark photons, gauged
2023, 47(9): 095102. doi: 10.1088/1674-1137/acddd5
Abstract:
In this paper, we present two non-perturbative string cosmological solutions without curvature singularities for the bosonic gravi-dilaton system. These solutions are general in that they can straightforwardly match the perturbative solution to arbitrarily high orders in the perturbative region. The first solution includes non-perturbative\begin{document}$ \alpha' $\end{document} ![]()
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\begin{document}$ \alpha^{\prime} $\end{document} ![]()
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In this paper, we present two non-perturbative string cosmological solutions without curvature singularities for the bosonic gravi-dilaton system. These solutions are general in that they can straightforwardly match the perturbative solution to arbitrarily high orders in the perturbative region. The first solution includes non-perturbative
2023, 47(9): 095103. doi: 10.1088/1674-1137/acddd6
Abstract:
This article presents the configuration of strange quark stars in hydrostatic equilibrium considering the Vaidya-Tikekar metric ansatz. The interior of such stars comprises strange quark matter (henceforth SQM), whose equation of state (\begin{document}$henceforth~EoS$\end{document} ![]()
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\begin{document}$p=\dfrac{1}{3}(\rho-4B)$\end{document} ![]()
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\begin{document}$(m_s)$\end{document} ![]()
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\begin{document}$m_s=0$\end{document} ![]()
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\begin{document}$57.55 < B < 91.54~\rm MeV/fm^3$\end{document} ![]()
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\begin{document}$2.01$\end{document} ![]()
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\begin{document}$1.60~M_{\odot}$\end{document} ![]()
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\begin{document}$57.55$\end{document} ![]()
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\begin{document}$91.54~\rm MeV/fm^3$\end{document} ![]()
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\begin{document}$m_s=0$\end{document} ![]()
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\begin{document}$m_s$\end{document} ![]()
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This article presents the configuration of strange quark stars in hydrostatic equilibrium considering the Vaidya-Tikekar metric ansatz. The interior of such stars comprises strange quark matter (henceforth SQM), whose equation of state (
2023, 47(9): 095104. doi: 10.1088/1674-1137/ace311
Abstract:
In the last few decades, gravastars have been proposed as an alternative to black holes. The stability of a gravastar has been examined in many modified theories of gravity along with Einstein's GR. The\begin{document}$ f(Q, T) $\end{document} ![]()
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\begin{document}$ p=-\rho $\end{document} ![]()
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In the last few decades, gravastars have been proposed as an alternative to black holes. The stability of a gravastar has been examined in many modified theories of gravity along with Einstein's GR. The
2023, 47(9): 095105. doi: 10.1088/1674-1137/ace9c2
Abstract:
The thermodynamics of charged spherically symmetric AdS black holes in conformal gravity is revisited using the recently proposed restricted phase space (RPS) formalism. This formalism avoids all the bizarreness arising in the extended phase space formalism for this model. It is found that the charged AdS black holes in this model may belong to a new universality class that is different from all previously studied cases under the RPS formalism. Besides the distinguished isocharge\begin{document}$ T-S $\end{document} ![]()
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\begin{document}$ \Phi-Q_e $\end{document} ![]()
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The thermodynamics of charged spherically symmetric AdS black holes in conformal gravity is revisited using the recently proposed restricted phase space (RPS) formalism. This formalism avoids all the bizarreness arising in the extended phase space formalism for this model. It is found that the charged AdS black holes in this model may belong to a new universality class that is different from all previously studied cases under the RPS formalism. Besides the distinguished isocharge
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