Impact factor of Chinese Physics C is 3.6 in 2023 Impact factor of Chinese Physics C is 3.6 in 2022 2021 Impact Factor 2.944
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  • Acoustic black hole in hayward spacetime: shadow, quasinormal modes and analogue Hawking radiation
    Zhong-Yi Hui, Yu-Ye Cheng, Jia-Rui Sun
    2026, 50(8): 085110. doi: 10.1088/1674-1137/ae7282
    In this paper, we study an acoustic black hole in Hayward spacetime within the framework of relativistic Gross-Pitaevskii theory. By examining the critical null geodesics, we sketch the shadow of the acoustic horizon. The quasinormal mode (QNM) frequencies of the acoustic Hayward black hole are then computed numerically using the WKB method. The results show that these modes are more stable than those of the Hayward black hole, and that variations in the QNM frequencies are correlated with the behavior of the effective potential. We also verify the relationship between QNMs and the acoustic sphere (and the acoustic shadow) in the eikonal limit. Moreover, the WKB method is employed to calculate the grey-body factor and energy emission rate of the analogue Hawking radiation. It is shown that, as the tuning parameter increases, both the grey-body factor and the energy emission rate are enhanced, which can likewise be attributed to changes in the effective potential. In addition, the acoustic shadow radius also increases with the tuning parameter. Our work extends the acoustic black hole model to regular black hole spacetime, and the findings provide a potential application for distinguishing regular black holes from black holes with singularities in astrophysical environments via acoustic black hole effects.
  • Interpretation of Ω(2012) as a Ξ(1530)${\bar{\boldsymbol K}}$ molecular state
    Xiang Yu, Jin-Peng Zhang, Xu-Liang Chen, Ding-Kun Lian, Qi-Nan Wang, Wei Chen
    2026, 50(8): 083106. doi: 10.1088/1674-1137/ae6da4
    We investigate the mass and strong decay properties of the $\Omega(2012)$ resonance using QCD sum rules, assuming it to be an S-wave $\Xi(1530)\bar{K}$ molecular pentaquark state with $I(J^{P})= 0({3}/{2}^{-})$. A unified interpolating current is constructed, and the two-point and three-point correlation functions are calculated up to dimension-13 and dimension-10 condensate terms in the OPE series, respectively. The negative-parity contribution is isolated by employing parity-projected sum rules. The two-body strong decays into $\Xi^0 K^-$ and $\Xi^- \bar{K}^0$ are studied using the corresponding three-point correlation functions. Our analysis yields a mass of $2.02 \pm 0.12~\mathrm{GeV}$ and a total two-body decay width of $\Gamma = 0.96^{+0.79}_{-0.41}~\mathrm{MeV}$ for the $\Xi(1530)\bar{K}$ molecular state. The ratio of the two-body decay branching fractions is obtained as $\mathcal{R}^{\Xi^- \bar{K}^0}_{\Xi^0 K^-} = 0.85$. These results are compatible with the experimental data for the $\Omega(2012)$ within uncertainties and support its interpretation as a $\Xi(1530)\bar{K}$ molecular pentaquark state.
  • Mini-review of charmonium weak decays at BESIII
    Xu-Ze Li, Kai-Xin Fan, Zheng-Yun You, Yu Zhang, Minggang Zhao
    2026, 50(8): 082001. doi: 10.1088/1674-1137/ae6a80
    The weak decays of charmonium states such as $ J/\psi $ and $ \psi(2S) $ are instrumental in probing both nonperturbative QCD dynamics and the flavor structure of the Standard Model (SM). The extreme rarity of charmonium weak decays renders them highly sensitive to physics beyond the SM, particularly in channels that are heavily suppressed in the SM, such as flavor-changing neutral-current (FCNC) decays. This review highlights the critical role of the BESIII experiment, which leverages an unprecedented data sample of over $ 10^{10} $ $ J/\psi $ and $ 2.7\times10^{9} $ $ \psi(2S) $ events to achieve leading sensitivity in searches for charmonium weak decays. We present the latest and most stringent upper limits established by BESIII on various semileptonic, nonleptonic, and FCNC charmonium weak decay channels.
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  • Dynamical double-folding potentials for α decay in odd-A nuclei: Comparison between Migdal and CDM3Y6 interactions
    Yihao Lian, Daming Deng, Nan Wang
    2026, 50(9): 094104-094104-12. doi: 10.1088/1674-1137/ae7cff
    Show Abstract
    The dynamical double-folding potential (DDFP) model is extended to investigate the α decays of odd-A nuclei in the region $ 78 \le Z \le 90 $. We present a systematic comparison between the deep-well DDFP based on the CDM3Y6 nucleon-nucleon interaction and the pocket-type DDFP based on the Migdal interaction. Both potentials reproduce the experimental α-decay half-lives satisfactorily, with root-mean-square deviations of $ \sigma = 0.212 $ and 0.250, respectively. The two potentials also yield similar trends in α preformation factors ($ P_\alpha $) for both favored and unfavored transitions, reflecting the high sensitivity of $ P_\alpha $ to shell structure and the variation of the proton pairing gap. Furthermore, our analysis demonstrates that the significant difference in the $ P_\alpha $ magnitude between the two potentials stems fundamentally from their distinct treatments of Pauli blocking effects.
  • High-density isovector uncertainty and direct-Urca thresholds in a ρ-flex density-dependent relativistic mean-field model
    Wen-Jie Xie, Cheng-Jun Xia
    2026, 50(9): 1-21. doi: 10.1088/1674-1137/ae823d
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    We investigate the role of the model dependence of the high-density isovector sector in neutron-star matter within a density-dependent relativistic mean-field framework. A 10-dimensional TW-like DD-RMF baseline model is compared with an 11-dimensional ρ-flex extension in which an additional parameter, $ \xi_\rho $, introduces a controlled deformation of the high-density ρ-meson channel while leaving the saturation-point isovector properties unchanged. Bayesian inference is performed for two data combinations: NS+GW, which includes neutron-star mass and radius measurements and GW170817 tidal information, and ALL+GW, which further incorporates low-density χEFT and heavy-ion-collision constraints. For each posterior sample, we construct the beta-equilibrated equation of state, solve the stellar structure and tidal-response equations, and determine the direct-Urca threshold. The Bayesian evidence differences, $ \Delta\ln Z_{\rm{INS}}=-0.23\pm0.08 $ for NS+GW and $ -0.02\pm0.17 $ for ALL+GW, indicate that present data do not statistically require the additional ρ-channel flexibility. The 10D and 11D models yield similar posterior predictions for the beta-equilibrium pressure, sound speed, mass-radius relation, tidal deformability, and maximum mass. In contrast, the 11D extension broadens the allowed ranges of the high-density symmetry energy, proton fraction, direct-Urca threshold density, onset mass, and direct-Urca activation probability. These results demonstrate that current multimessenger constraints primarily restrict the bulk stiffness of beta-equilibrated matter, while residual uncertainty in the high-density isovector sector remains relevant for composition-sensitive and cooling-related observables.
  • Probing quantum phase transitions in the sdg-Interacting Boson Model using von neumann entropy
    M. Ghapanvari, M. Sayedi, N. Amiri, M. A. Jafarizadeh
    2026, 50(9): 094103-094103-10. doi: 10.1088/1674-1137/ae75fc
    Show Abstract
    In this work, the von Neumann entropy has been calculated and employed as a probe to analyse quantum phase transitions (QPTs) within the $ sdg $-Interacting Boson Model ($ sdg $-IBM). The von Neumann entropy between the $s$-boson and $dg$-boson sectors is used as an indicator of QPTs and as a robust observable for the theoretical analysis of the $ _{\phantom{108-1}48}^{108-116}\mathrm{Cd} $ isotopes. The von Neumann entropy correctly characterises the QPT in the ${U_d}\left( 5 \right) \otimes{U_g}\left( 9 \right) \leftrightarrow S O_{sdg}\left( {15} \right)$ transition region. The numerical results show that the $ _{\phantom{1}48}^{108}\mathrm{Cd} $ and $ _{\phantom{1}48}^{116}\mathrm{Cd} $ isotopes are located in the ${U_d}\left( 5 \right) \otimes{U_g}$ and $S O_{sdg}(15)$ limits, respectively.
Current Issued
Chinese Physics C
2026 Vol. 50, No. 7
Published: 06 July 2026
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Chinese Physics C
IF: 3.1

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ISSN 1674-1137 CN 11-5641/O4

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