Chinese Physics C最新文献_第4页

Neutrino oscillations in the Non-Kerr black hole with quantum phenomenon 非克尔黑洞中的中微子振荡与量子现象

Chinese Physics C Pub Date : 2024-04-09 DOI: 10.1088/1674-1137/ad3c2c

Husan Alibekov, Farruh Atamurotov, A. Abdujabbarov, Vokhid Khamidov

引用次数: 0

The nuclear decay database in fission product mass region 裂变产物质量区的核衰变数据库

Chinese Physics C Pub Date : 2024-04-08 DOI: 10.1088/1674-1137/ad3b9d

Xiaolong Huang, Dong Yang, Zhigang Ge, Xianghan Wang, Yangyang Liu, Yongli Jin, Jian Li

引用次数: 0

The $mathbf{bar{q}qbar{s}Q}$ $mathbf{(q=u,,d;,Q=c,,b)}$ tetraquark system in a chiral quark model 手性夸克模型中的 $mathbf{ （q=u,,d;,Q=c,,b）}$ 四夸克系统

Chinese Physics C Pub Date : 2024-04-03 DOI: 10.1088/1674-1137/ad39cd

Gang Yang, Jia-Lun 平加伦 Ping, Jorge Segovia

{"title":"The $mathbf{bar{q}qbar{s}Q}$ $mathbf{(q=u,,d;,Q=c,,b)}$ tetraquark system in a chiral quark model","authors":"Gang Yang, Jia-Lun 平加伦 Ping, Jorge Segovia","doi":"10.1088/1674-1137/ad39cd","DOIUrl":"https://doi.org/10.1088/1674-1137/ad39cd","url":null,"abstract":"\u0000 The $S$-wave $bar{q}qbar{s}Q$ $(q=u,,d;,Q=c,,b)$ tetraquarks, with spin-parity $J^P=0^+$, $1^+$ and $2^+$, in both isoscalar and isovector sectors are systematically studied in a chiral quark model. The meson-meson, diquark-antidiquark and K-type arrangements of quarks, along with all possible color wave functions, are comprehensively considered. The four-body system is solved by means of a highly efficient computational approach, the Gaussian expansion method, along with a complex-scaling formulation of the problem to disentangle bound, resonance and scattering states. This theoretical framework has already been successfully applied in various tetra- and penta-quark systems. In the complete coupled-channel case, and within the complex-range formulation, several narrow resonances of $bar{q}qbar{s}c$ and $bar{q}qbar{s}b$ systems are obtained, in each allowed $I(J^P)$-channels, within the energy regions $2.4-3.4$ GeV and $5.7-6.7$ GeV, respectively. The predicted exotic states, which are an indication of a richer color structure when going towards multiquark systems beyond mesons and baryons, are expected to be confirmed in future high-energy particle and nuclear experiments.Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140748520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The quasi-Gaussian distribution of DMIGM in fast radio bursts may bias the constraints on the Hubble constant 快速射电暴中 DMIGM 的准高斯分布可能会使哈勃常数的约束出现偏差

Chinese Physics C Pub Date : 2024-04-01 DOI: 10.1088/1674-1137/ad3942

Guixiang Chen, Xin Li

{"title":"The quasi-Gaussian distribution of DMIGM in fast radio bursts may bias the constraints on the Hubble constant","authors":"Guixiang Chen, Xin Li","doi":"10.1088/1674-1137/ad3942","DOIUrl":"https://doi.org/10.1088/1674-1137/ad3942","url":null,"abstract":"\u0000 Fast radio bursts (FRBs) are useful cosmological probes with numerous applications in cosmology. The distribution of the dispersion measure contribution from the intergalactic medium is a key issue. A quasi-Gaussian distribution has been used to replace the traditional Gaussian distribution, which yields promising results. However, our work suggests that there may be additional challenges in its application. Here we use 35 well-localized FRBs to constrain the Hubble constant H0 along with two FRB-related parameters, yielding H0 =60.99+4.57\u0000 −4.90 km s-1 Mpc-1. The best-fitting Hubble constant H0 is smaller than the value obtained from the Cosmic Microwave Background (CMB), which may be caused by the small sample size of current FRB data. Monte Carlo simulations indicate that a set of 100 simulated FRBs provides a more precise fitting result for the Hubble constant. But the precision of the Hubble constant does not improve when further enlarging the FRB sample. Further simulations reveal a systematic deviation in the fitting results of H0, attributed to the quasi-Gaussian distribution of dispersion measure in the intergalactic medium. Despite this, the results remain reliable within the 1σ uncertainty, assuming a sufficient number of FRB data are available.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140785380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Waveform Simulation in PandaX-4T PandaX-4T 中的波形模拟

Chinese Physics C Pub Date : 2024-03-27 DOI: 10.1088/1674-1137/ad380f

Qing Lin, Jiafu Li

{"title":"Waveform Simulation in PandaX-4T","authors":"Qing Lin, Jiafu Li","doi":"10.1088/1674-1137/ad380f","DOIUrl":"https://doi.org/10.1088/1674-1137/ad380f","url":null,"abstract":"\u0000 Signal reconstruction through software processing is a crucial component of the background and signal models in the PandaX-4T experiment, which is a multi-tonne dark matter direct search experiment. The accuracy of signal reconstruction is influenced by various detector artifacts, including noise, dark count of photomultiplier, photoionization of impurities in the detector, and other relevant considerations. In this study, we present a detailed description of a semi-data-driven approach designed to simulate the signal waveform. This work provides a reliable model for the efficiency and bias of the signal reconstruction in the data analysis of PandaX-4T. By comparing critical variables which relate to the temporal shape and hit pattern of the signals, we demonstrate a good agreement between the simulation and data. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140374880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Implications on Skyrme equations of state from neutron skin measurements 中子皮层测量对 Skyrme 状态方程的影响

Chinese Physics C Pub Date : 2024-03-27 DOI: 10.1088/1674-1137/ad3814

Dawei Guan, Junchen Pei, Chongji Jiang

引用次数: 0

TALYS calculation and a short review of the experimental status of proton capture studies on p-nuclei: A guide to future investigation. TALYS 计算和 p 核质子俘获研究实验状况简评：未来研究指南。

Chinese Physics C Pub Date : 2024-02-28 DOI: 10.1088/1674-1137/ad2dc3

Indrani Ray, Argha Deb

引用次数: 0

Sequential decay analysis of $^{235}$U(n$^{th}$,f) reaction using fragmentation approach 利用碎片法对 $^{235}$U(n$^{th}$,f) 反应进行序列衰变分析

Chinese Physics C Pub Date : 2024-02-28 DOI: 10.1088/1674-1137/ad2dc1

N. Sharma, Ashutosh Kaushik, Manoj K Sharma

{"title":"Sequential decay analysis of $^{235}$U(n$^{th}$,f) reaction using fragmentation approach","authors":"N. Sharma, Ashutosh Kaushik, Manoj K Sharma","doi":"10.1088/1674-1137/ad2dc1","DOIUrl":"https://doi.org/10.1088/1674-1137/ad2dc1","url":null,"abstract":"\u0000 Numerous experimental and theoretical observations conclude that the probability of the three fragment emission (ternary fission) or the binary fission increases when one proceeds towards the heavy mass region of nuclear periodic table. The collinear cluster tripartition (CCT) channel of $^{235}$U(n$^{th}$,f) reaction is studied and it was observed that the CCT may be a sequential process or a simultaneous emission phenomena. Till now, different approaches are introduced to study the CCT process as a simultaneous process or sequential process, but the decay dynamics of these modes is not fully explored. It will be of interest to identify the three fragments of the sequential process and to explore their related dynamics using some excitation energy dependent approach. Hence, in present work, an attempt is made to study the sequential decay mechanism of $^{235}$U(n$^{th}$,f) reaction using quantum mechanical fragmentation theory (QMFT). The decay mechanism is considered in two steps, where initially the nucleus splits into an asymmetric channel. In the second step, the heavy fragment obtained in the first step divides into two fragments. Stage I analysis is done by calculating the fragmentation potential and the preformation probability for the spherical and deformed choice of the decaying fragments. The most probable fragment combination of stage I are identified in view the dips in the fragmentation structure, and the corresponding maxima's of the preformation probability ($P_0$). The excitation energy of the decay channel is calculated using an iteration process. The obtained excitation energy of the identified heavy fragments is further used for the fragmentation analysis, and the subsequent binary fragments of the sequential process are obtained. The identified three fragments of the sequential process are in agreement with the experimental observation and are found nearby the neutron or proton shell closure. Finally, the kinetic energy of the observed fragments is calculated and the middle fragment of the CCT mechanism is identified.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140422485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Merger estimates for a disformal Kerr black hole in quadratic degenerate higher-order scalar-tensor theories 二次退化高阶标量张量理论中的异形克尔黑洞的合并估计值

Chinese Physics C Pub Date : 2024-02-26 DOI: 10.1088/1674-1137/ad2ce5

Hongxin Jiang, Xinyi Du, Qiyuan Pan, Songbai Chen, Jiliang Jing

引用次数: 0

Probing valence quark width of the proton in deeply virtual Compton scattering at high energies 在高能量下的深虚康普顿散射中探测质子的价夸克宽度

Chinese Physics C Pub Date : 2024-02-21 DOI: 10.1088/1674-1137/ad2b50

Wenchang Xiang, Dewen Cao, Dai-Cui 周代翠 Zhou

{"title":"Probing valence quark width of the proton in deeply virtual Compton scattering at high energies","authors":"Wenchang Xiang, Dewen Cao, Dai-Cui 周代翠 Zhou","doi":"10.1088/1674-1137/ad2b50","DOIUrl":"https://doi.org/10.1088/1674-1137/ad2b50","url":null,"abstract":"\u0000 We use the refined hot spot model to study the valence quark shape of the proton with the deeply virtual Compton scattering at high energies in the framework of Color Glass Condensate. To investigate the individual valence quark shape, a novel treatment of the valence quark width is employed. We calculate the cross-sections for the coherent and incoherent deeply virtual Compton scattering, for the first time, by using different widths ($mathrm{B_u}$ and $mathrm{B_d}$) for the profile density distributions of the up and down quarks instead of using the same width as in the literature. We find that the cross-sections calculated with $mathrm{B_u geq B_d}$ at each collision energy are consistent with each other themselves, which is in agreement with the theoretical expectations. While the ones computed with $mathrm{B_u < B_d}$ show some discrepancies. This outcome implies that the up quark might emit more gluons than the down quark leading to $mathrm{B_u geq B_d}$ at high energy. The energy impact of the outcome is estimated. Our results show that as the collision energy increases, the aforementioned discrepancies are not only significantly broadened, but also shift to relatively smaller momentum transfer range in the future Electron-Ion Collider (EIC) and Large Hadron Electron Collider (LHeC) energies, which indicates that the EIC and LHeC can provide unprecedented chance to access the shape of the valence quark of the proton.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140442491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0