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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  • The forward-backward asymmetry induced CP asymmetry in ${{\overline{B}}^{0}\rightarrow K^{-}\pi^{+}\pi^{0}}$ in phase space around the resonances ${{\overline{K}}^{*}(892)^{0}}$ and ${{\overline{K}}^{*}_{0}(700)}$
    Jian-Yu Yang, Yu-Jie Zhao, Jing-Juan Qi, Zhen-Hua Zhang
    2026, 50(5): 053102. doi: 10.1088/1674-1137/ae39cc
    The interference between amplitudes corresponding to different intermediate resonances plays an important role in generating large CP asymmetries in the phase space in multi-body decays of bottom and charmed mesons. In this study, we examine the CP violation in the decay channel $ {\overline{B}}^{0}\rightarrow K^{-}\pi^{+}\pi^{0} $ in the phase-space region where the intermediate resonances $ \overline{K}^{*}(892)^{0} $ and $ {\overline{K}^{*}_{0}(700)} $ dominate. In particular, the forward-backward asymmetry (FBA) and the CP asymmetry induced by FBA (FB-CPA), which are closely related to the interference effects between the two aforementioned resonances, are investigated. The nontrivial correlation between FBA and FB-CPA is analyzed. The analysis indicates that FB-CPAs around the resonance $ \overline{K}^{*}(892)^{0} $ can be as large as approximately 35%, which can be potentially accessible by Belle and Belle-II collaborations in the near future.
  • Systematic study of microscopic nuclear level densities of Sn isotopes within a relativistic framework
    Guanbin He, Nuocheng Tang, Yuan Tian, Ying Cui, Jian Li, Yi Xu, Ruirui Xu
    2026, 50(5): 054107. doi: 10.1088/1674-1137/ae4329
    Nuclear level density (NLD) plays a crucial role in describing the statistical properties of excited nuclei and is a key input for models of compound nuclear reactions, such as those used in nuclear astrophysics and reactor physics. In this study, we construct microscopic nuclear level densities for Sn isotopes by combining single-particle spectra, pairing correlations, and deformation parameters derived from relativistic Hartree–Bogoliubov (RHB) calculations with the combinatorial method. We examine the energy dependence and isotopic systematics of the calculated level densities. In particular, we analyze their variation with excitation energy and neutron number, and compare them to available experimental data, including cumulative low-lying levels and s-wave neutron resonance spacings ($ D_0 $). The resulting level densities are further employed as input to Hauser–Feshbach calculations of radiative neutron capture $ (n,\gamma) $ cross-sections [Nuclear Data Sheets 120, 272 (2014)]. Our results demonstrate that RHB-based nuclear level densities provide a reliable microscopic framework for describing Sn isotopic level densities and accurately predicting $ (n,\gamma) $ cross-sections.
  • Investigation of the level structure of 91−94Zr nuclei using large-scale shell-model calculations
    Bin-Ran Tan, Hao-Yu Jiang, H. K. Wang, Zhi-Hong Li
    2026, 50(5): 054105. doi: 10.1088/1674-1137/ae43c5
    A suitable Hamiltonian was designed for the Zr isotopes over the N = 50 shell by including shell model space between 78Ni and 132Sn. The Hamiltonian is composed by the pairing-plus-multipole force and monopole correction terms. The single-particle energies (SPEs) were initially taken from the low-lying states of hole nuclei 131In and 131Sn (near the N = 82 shell closure). These SPEs were then modified by three monopole correction terms to better describe the low-lying states of 91Zr (near the N = 50 shell closure). To test this Hamiltonian, the level spectra of 91−94Zr were investigated in both low-lying and high-spin excitations by large-scale shell-model calculations. Their wave functions were further tested by comparing the electromagnetic transition probabilities with given $ B(E2)$ data. The good performance in both spectra and transitions probabilities makes the predicting calculations of the present interaction more dependable to be referred in further experimental researches of Zr isotopes.
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  • Photonuclear reactions on stable isotopes of cadmium and tellurium at bremsstrahlung end-point energies of 10-23 MeV
    F.A. Rasulova, A.A. Kuznetsov, V.O. Nesterenko, J.H. Khushvaktov, S.I. Alekseev, N.Yu. Fursova, A.S. Madumarov, I. Chuprakov, S.S. Belyshev, N.V. Aksenov
    Published: 2026-04-20
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    This work used the γ-activation approach to conduct tests at bremsstrahlung end-point energies of 10-23 MeV utilising the MT-25 microtron beam. The experimental values of relative yields and cross sections per equivalent quantum of photonuclear reactions on stable isotopes of cadmium and tellurium were compared to theoretical calculations obtained from TALYS-2.0 using the default parameters and a combined model of photonucleon reactions (CMPR). The inclusion of isospin splitting in the combined model of photonucleon reactions allows for the description of experimental data on proton escape reactions with energies ranging from 17 to 23 MeV. As a result, isospin splitting must be taken into consideration in order to accurately describe the decay of the giant dipole resonance. For Cd isotopes, essential discrepancies of yet unclear origin between theory (TALYS 2.0 and CMPR) and experimental data are found in the neutron channel.
  • New Evaluation and Validation Towards Neutron Reaction Data on Chromium Isotopes at Incident Energies Below 200 MeV
    Wen-Ye Wang, Yin-Lu Han, Ji-Min Wang, Huan-Yu Zhang, Yuan Tian, Xi Tao, Hai-Cheng Wu, Yong-Li Jin, Bo-Yu Tan, Yue Zhang, Zhao-Hui Wang, Zhi-Gang Ge, Rui-Rui Xu
    Published: 2026-04-20
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    Chromium (Cr) serves as an indispensable structural material in accelerator-driven systems (ADS) and Generation IV reactors, where the precision of its neutron reaction data is important for ensuring reactor safety and operational reliability. However, significant discrepancies persist in both experimental data and evaluations for key reaction channels, such as $(n, p)$ and $(n, 2n)$, across the chromium isotopes $^{50,52,53,54}{\rm{Cr}}$. This study presents a novel evaluation and validation of neutron reaction data for these isotopes at incident energies below 200 MeV, incorporating 571 experimental datasets from EXFOR covering cross sections, angular distributions, energy spectra, and double - differential cross sections. The newly evaluated data provide more reliable key cross sections: the $^{52}{\rm{Cr}}(n,2n)$ cross section resolves discrepancies and supports H.,Liskien et al.'s data; the $^{52}{\rm{Cr}}(n, p)$ cross section aligns well with natural chromium data across all energies, and is validated by competition analysis. The results accurately replicate double differential cross sections and energy spectra, with neutron emission spectra matching experimental peaks and charged - particle spectra agreeing with measurements for $^{50,52}{\rm{Cr}}$. Moreover, the abundance - weighted sum of $(n, p)$ and $(n, 2n)$ cross sections for chromium isotopes agrees well with natural chromium data, confirming systematic consistency. All evaluations are validated using 62 ICSBEP 2014 benchmark facilities with $k_{{\rm{eff}}}$ sensitivity to chromium neutron data > 1%. For the PMI002_01 experiment, calculated $k_{{\rm{eff}}}$ decreased by $\sim 1000$ pcm relative to CENDL - 3.2, improving agreement with the benchmark; in the OKTAVIAN shielding benchmark, the neutron leakage spectrum also produces experiments well.
  • Reconciling the ACT preference in f(T) gravity: inflation and reheating constraints
    Feng-Yi Zhang, Rongrong Zhai, Li-Yang Chen
    2026, 50(6): 1-13. doi: 10.1088/1674-1137/ae5806
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    Recent measurements from the Atacama Cosmology Telescope (ACT) indicate a preference for a slightly bluer scalar spectral index compared to Planck-only analyses, placing canonical inflationary models in General Relativity (GR) under mild pressure. We demonstrate that f(T) gravity systematically accommodates these dataset-dependent preferences by suppressing the tensor-to-scalar ratio in monomial and hilltop potentials, and by shifting the spectral index of E-models toward the ACT-favored region. Incorporating Big Bang Nucleosynthesis bounds, we break the degeneracy between the inflationary e-folding number and the post-inflationary thermal history. A direct side-by-side comparison reveals that reconciling models such as the Starobinsky potential with ACT data in GR strictly necessitates a non-standard, stiff (kinetic-dominated) reheating phase. In contrast, torsional corrections in f(T) gravity significantly enlarge the viable parameter space, relaxing these stringent phenomenological requirements and establishing a coherent framework that jointly constrains CMB observables and reheating dynamics.
Current Issued
Chinese Physics C
2026 Vol. 50, No. 5
Published: 28 April 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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