Chinese Physics C最新文献_第7页

Shadow and weak gravitational lensing for Ellis-Bronnikov wormhole 埃利斯-布朗尼科夫虫洞的阴影和弱引力透射

Chinese Physics C Pub Date : 2023-12-18 DOI: 10.1088/1674-1137/ad1677

Mirzabek Alloqulov, Farruh Atamurotov, A. Abdujabbarov, B. Ahmedov, Vokhid Khamidov

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Cosmic Implications of $ ^{12}mathrm C(n,gamma)^{13}mathrm C$ Reaction: A Nuclear Astrophysical Perspective $^{12}mathrm C(n,gamma)^{13}mathrm C$ 反应的宇宙影响：核天体物理学视角

Chinese Physics C Pub Date : 2023-11-28 DOI: 10.1088/1674-1137/ad102a

Soumya Saha

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Dynamics of 7Li Breakup and its Influence on Elastic Scattering: A Study of 7Li + 144Sm System 7Li 分裂动力学及其对弹性散射的影响：7Li + 144Sm 系统研究

Chinese Physics C Pub Date : 2023-11-28 DOI: 10.1088/1674-1137/ad1029

A. Morzabayev, Nurlan Amangeldi, awad A. ibraheem, D. Soldatkhan, Gani Yergaliuly, Bakytbek Mauyey, Anuar Aida Orazalievna, Sherief Hamada

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Radiative decays bm{$D^*_{(s)}to D_{(s)}gamma$} in covariant confined quark model 共变约束夸克模型中的辐射衰变 bm{$D^*_{(s)}to D_{(s)}gamma$}

Chinese Physics C Pub Date : 2023-11-28 DOI: 10.1088/1674-1137/ad102c

C. Tran, Mikhail A. Ivanov, Pietro Santorelli, Quang-Chau Vo

{"title":"Radiative decays bm{$D^*_{(s)}to D_{(s)}gamma$} in covariant confined quark model","authors":"C. Tran, Mikhail A. Ivanov, Pietro Santorelli, Quang-Chau Vo","doi":"10.1088/1674-1137/ad102c","DOIUrl":"https://doi.org/10.1088/1674-1137/ad102c","url":null,"abstract":"Radiative decays $D^*_{(s)}to D_{(s)}gamma$ are revisited in light of new experimental data from textit{BABAR} and BESIII collaborations. The radiative couplings $g_{D^*Dgamma}$ encoding nonperturbative QCD effects are calculated in the framework of the covariant confined quark model developed by us. We compare our results with other theoretical studies and experimental data. The couplings (in $textrm{GeV}^{-1}$) $|g_{D^{*+}D^+gamma}| = 0.45(9)$ and $|g_{D^{*0}D^0gamma}| = 1.72(34)$ calculated in our model agree with the experimental data $|g_{D^{*+}D^+gamma}|=0.47(7)$ and $|g_{D^{*0}D^0gamma}|=1.77(16)$. The most interesting case is the decay $D^*_sto D_sgamma$, for which the recent prediction based on light-cone sum rules at next-to-leading order $|g_{D^*_s D_sgamma}|=0.60(19)$ deviates from the first (and so far the only) lattice QCD result $|g_{D^*_s D_sgamma}|=0.11(2)$ at nearly $3sigma$. Our calculation yields $|g_{D^*_s D_sgamma}|=0.29(6)$, which falls somehow between the two mentioned results, but is larger than those predicted in other studies using quark models or QCD sum rules. 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":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139218916","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}

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Analysis of the data for γp → f1(1285)p photoproduction γp→f1(1285)p光生成数据分析

Chinese Physics C Pub Date : 2023-11-22 DOI: 10.1088/1674-1137/ad0f13

Ai-Chao Wang, N. Wei, Fei Huang

{"title":"Analysis of the data for γp → f1(1285)p photoproduction","authors":"Ai-Chao Wang, N. Wei, Fei Huang","doi":"10.1088/1674-1137/ad0f13","DOIUrl":"https://doi.org/10.1088/1674-1137/ad0f13","url":null,"abstract":"The photoproduction of f1(1285) meson off proton is investigated within an effective Lagrangian approach. The t-channel ρ- and ω-exchange diagrams, u-channel nucleon-exchange diagram, generalized contact term, and s-channel pole diagrams of nucleon and a minimal number of nucleon resonances are taken into account in constructing the reaction amplitudes to describe the experimental data. Three different models, i.e., the Feynman model, the Regge model, and the interpolated Regge model, are employed where the t-channel reaction amplitudes are constructed in Feynman type, Regge type, and interpolated Regge type, respectively. The results show that in neither Feynman model nor interpolated Regge model can the available data for γp → f1(1285)p be satisfactorily reproduced. Nevertheless, in the Regge model, when any one of the N(1990)7/2+, N(2000)5/2+, N(2040)3/2+, N(2060)5/2−, N(2100)1/2+, N(2120)3/2−, N(2190)7/2−, N(2300)1/2+, and N(2570)5/2−resonances is considered, the data can be well described. The resulted resonance parameters are consistent with those advocated in Particle Data Group (PDG) review. Further analysis shows that in high-energy region, the peaks of γp → f1(1285)p differential cross sections at forward angles are dominated by the contributions from t-channel ρ- and ω-exchange diagrams, while in low-energy region, the s-channel pole diagrams of resonances also provide significant contributions to the γp → f1(1285)p cross sections.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":"39 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139247488","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

Investigation of $rm {}^{58}Ni ( n, p ){}^{58}Co$ reaction cross-section with covariance analysis 用协方差分析法研究 $rm {}^{58}Ni ( n, p ){}^{58}Co$ 反应截面

Chinese Physics C Pub Date : 2023-11-21 DOI: 10.1088/1674-1137/ad0e5a

A. Hingu, Surjit Mukherjee, S. Parashari, S. Arora, A. Gandhi, Mahima Upadhyay, Mahesh Choudhary, Sumit Bamal, N. Singh, G. Mishra, S. De, Saurav Sood, Sajin Prasad, G. Saxena, Ajay Kumar, R. Thomas, B. K. Agrawal, Karel Katovsky, A. Kumar

{"title":"Investigation of $rm {}^{58}Ni ( n, p ){}^{58}Co$ reaction cross-section with covariance analysis","authors":"A. Hingu, Surjit Mukherjee, S. Parashari, S. Arora, A. Gandhi, Mahima Upadhyay, Mahesh Choudhary, Sumit Bamal, N. Singh, G. Mishra, S. De, Saurav Sood, Sajin Prasad, G. Saxena, Ajay Kumar, R. Thomas, B. K. Agrawal, Karel Katovsky, A. Kumar","doi":"10.1088/1674-1137/ad0e5a","DOIUrl":"https://doi.org/10.1088/1674-1137/ad0e5a","url":null,"abstract":"The excitation function of the $rm {}^{58}Ni ( n, p ){}^{58}Co$ reaction is measured by using the well-established neutron activation technique and $gamma$-ray spectroscopy. Neutrons in the energy range of 1.7 to 2.7 $rm MeV$ were generated using the $rm ^{7}Li(p, n)$ reaction. The neutron flux was measured by using the standard $rm {}^{115}In ( n, n^{'} ){}^{115m}In$ monitor reaction. The results of neutron spectrum averaged cross-section of $rm {}^{58}Ni ( n, p ){}^{58}Co$ reactions are compared with existing cross-section data available in the EXFOR data library as well as with various evaluated data libraries like ENDF/B-VIII.0, JEFF-3.3, JENDL-4.0 and CENDL-3.2. Theoretical calculations were performed using the nuclear reaction code TALYS. Various nuclear level density (NLD) models were tested and compared with the present findings. Realistic NLDs are also obtained through the spectral distribution method (SDM). The cross-section results are reported along with the absolute errors by investigating uncertainty propagation, using the covariance technique. The corrections for $gamma$-ray true coincidence summing, low-energy background neutrons and $gamma$-ray self attenuation are performed. The experimental cross-section obtained in the present study is consistent with previously published experimental data, evaluated libraries and theoretical calculations carried out using the TALYS code.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":"460 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139251852","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

From masses and radii of neutron stars to EOS of nuclear matter through neural network 通过神经网络从中子星的质量和半径到核物质的 EOS

Chinese Physics C Pub Date : 2023-11-20 DOI: 10.1088/1674-1137/ad0e04

Zehan Wu, Dehua 文德华 Wen

{"title":"From masses and radii of neutron stars to EOS of nuclear matter through neural network","authors":"Zehan Wu, Dehua 文德华 Wen","doi":"10.1088/1674-1137/ad0e04","DOIUrl":"https://doi.org/10.1088/1674-1137/ad0e04","url":null,"abstract":"The equation of state (EOS) of dense nuclear matter is a key factor to determine the internal structure and properties of neutron stars. However, the EOS of high-density nuclear matter has great uncertainty mainly because the terrestrial nuclear experiments cannot reproduce matter as dense as that in the inner core of a neutron star. Fortunately, continuous improvements in astronomical observations of neutron stars provide the opportunity to inversely constrain the EOS of high-density nuclear matter. A number of methods have been proposed to implement this inverse constraint, such as the Bayesian analysis algorithm, the Lindblom's approach, and so on. Neural network algorithm is an effective new method developed in recent years. By employing a set of isospin-dependent parametric EOSs as the training sample of neural network algorithm, we set up an effective way to reconstruct the EOS with relative accuracy through a few mass-radius data. Based on the obtained neural network algorithms and according to the NICER observations on masses and radii of neutron stars with assumed precision, we get the inversely constrained EOS and further calculate the corresponding macroscopic properties of the neutron star. The results are basically consistent with the constraint on EOS from the Huth et~ al. based on Bayesian analysis. Moreover, the results show that even though the neural network algorithm was obtained by using the finite parameterized EOS as the training set, it is valid for any rational parameter combination of the parameterized EOS model.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139257485","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

What can we learn from recent $2nubetabeta$ experiments? 我们能从最近的 $2nubetabeta$ 实验中学到什么？

Chinese Physics C Pub Date : 2023-09-23 DOI: 10.1088/1674-1137/ad181b

D. Fang

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Impact of a nearby subhalo on the constraint of dark matter annihilation from cosmic ray antiprotons 附近亚光环对宇宙射线反质子暗物质湮灭约束的影响

Chinese Physics C Pub Date : 2023-09-19 DOI: 10.1088/1674-1137/ad13f7

Yi Zhao, Xiaojun Bi, Su-jie Lin, P. Yin

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The $U(1)_{L_mu-L_tau}$ breaking phase transition, muon $g-2$, dark matter, collider and gravitational wave U(1)_{L_mu-L_tau}$断裂相变、μ介子$g-2$、暗物质、对撞机和引力波

Chinese Physics C Pub Date : 2023-09-17 DOI: 10.1088/1674-1137/ad0f89

Jie Wang, Jinghong Ma, Jing Gao, Xiao-Fang Han, Lei Wang

{"title":"The $U(1)_{L_mu-L_tau}$ breaking phase transition, muon $g-2$, dark matter, collider and gravitational wave","authors":"Jie Wang, Jinghong Ma, Jing Gao, Xiao-Fang Han, Lei Wang","doi":"10.1088/1674-1137/ad0f89","DOIUrl":"https://doi.org/10.1088/1674-1137/ad0f89","url":null,"abstract":"Combining the dark matter and muon $g-2$ anomaly, we study the $U(1)_{L_mu-L_tau}$ breaking phase transition, gravitational wave spectra, and the direct detection at the LHC in an extra $U(1)_{L_mu-L_tau}$ gauge symmetry extension of the standard model. The new fields includes vector-like leptons ($E_1,~ E_2,~ N$), $U(1)_{L_mu-L_tau}$ breaking scalar $S$ and gauge boson $Z'$, as well as the dark matter candidate $X_I$ and its heavy partner $X_R$. A joint explanation of the dark matter relic density and muon $g-2$ anomaly excludes the region where both $min(m_{E_1},m_{E_2},m_N,m_{X_R})$ and $min(m_{Z'},m_S)$ are much larger than $m_{X_I}$. In the parameter space accommodating the DM relic density and muon $g-2$ anomaly, the model can achieve a first order $U(1)_{L_mu-L_tau}$ breaking phase transition, whose strength is sensitive to the parameters of Higgs potential. The corresponding gravitational wave spectra can reach the sensitivity of U-DECIGO. In addition, the direct searches at the LHC impose stringent bound on the mass spectra of the vector-like leptons and dark matter. 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":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139339356","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}

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