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Measurement of the branching fraction of D⁺→ τ⁺ν_τ

Journal of High Energy physics 2025年第1期2025卷 1-16页

作者： Ablikim, M. Achasov, M.N. Adlarson, P. Afedulidis, O. Ai, X.C. Aliberti, R. Amoroso, A. Bai, Y. Bakina, O. Balossino, I. Ban, Y. Bao, H.-R. Batozskaya, V. Begzsuren, K. Berger, N. Berlowski, M. Bertani, M. Bettoni, D. Bianchi, F. Bianco, E. Bortone, A. Boyko, I. Briere, R.A. Brueggemann, A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chai, X.Y. Chang, J.F. Che, G.R. Che, Y.Z. Chelkov, G. Chen, Chao Chen, C.H. Chen, G. Chen, H.S. Chen, H.Y. Chen, M.L. Chen, S.J. Chen, S.L. Chen, S.M. Chen, T. Chen, X.R. Chen, X.T. Chen, Y.B. Chen, Y.Q. Chen, Z.J. Chen, Z.Y. Choi, S.K. Cibinetto, G. Cossio, F. Cui, J.J. Dai, H.L. Dai, J.P. Dbeyssi, A. de Boer, R.E. Dedovich, D. Deng, C.Q. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. De Mori, F. Ding, B. Ding, X.X. Ding, Y. Dong, J. Dong, L.Y. Dong, M.Y. Dong, X. Du, M.C. Du, S.X. Duan, Y.Y. Duan, Z.H. Egorov, P. Fan, Y.H. Fang, J. Fang, S.S. Fang, W.X. Fang, Y. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Feng, J.H. Feng, Y.T. Fritsch, M. Fu, C.D. Fu, J.L. Fu, Y.W. Gao, H. Gao, X.B. Gao, Y.N. Gao, Yang Garbolino, S. Garzia, I. Ge, L. Ge, P.T. Ge, Z.W. Geng, C. Gersabeck, E.M. Gilman, A. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Gramigna, S. Greco, M. Gu, M.H. Gu, Y.T. Guan, C.Y. Guo, A.Q. Guo, L.B. Guo, M.J. Guo, R.P. Guo, Y.P. Guskov, A. Gutierrez, J. Han, K.L. Han, T.T. Hanisch, F. Hao, X.Q. Harris, F.A. He, K.K. He, K.L. Heinsius, F.H. Heinz, C.H. Heng, Y.K. Herold, C. Holtmann, T. Hong, P.C. Hou, G.Y. Hou, X.T. Hou, Y.R. Hou, Z.L. Hu, B.Y. Hu, H.M. Hu, J.F. Hu, Q.P. Hu, S.L. Hu, T. Hu, Y. Huang, G.S. Huang, K.X. Huang, L.Q. Huang, X.T. Huang, Y.P. Huang, Y.S. Hussain, T. Hölzken, F. Hüsken, N. in der Wiesche, N. Jackson, J. Janchiv, S. Jeong, J.H. Ji, Q. Ji, Q.P. Ji, W. Ji, X.B. Ji, X.L. Ji, Y.Y. Jia, X.Q. Jia, Z.K. Jiang, D. Jiang, H.B. Jiang, P.C. Jiang, S.S. Jiang, T.J. Jiang, X.S. Jiang, Y. Jiao, J.B. Jiao, J.K. Jiao, Z. Jin, S. Jin, Y. Jing, M.Q. Jing, X.M. Johansson, T. Kabana, S. Kalantar-Nayestanaki, N. Kang, X.L. Kang, X.S. Kavatsyuk Institute of High Energy Physics Beijing 100049 China Beihang University Beijing 100191 China Bochum Ruhr-University Bochum D-44780 Germany Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russian Federation Carnegie Mellon University Pittsburgh 15213 PA United States Central China Normal University Wuhan 430079 China Central South University Changsha 410083 China China Center of Advanced Science and Technology Beijing 100190 China China University of Geosciences Wuhan 430074 China Chung-Ang University Seoul 06974 South Korea COMSATS University Islamabad Lahore Campus Defence Road Off Raiwind Road Lahore 54000 Pakistan Fudan University Shanghai 200433 China GSI Helmholtzcentre for Heavy Ion Research GmbH Darmstadt D-64291 Germany Guangxi Normal University Guilin 541004 China Guangxi University Nanning 530004 China Hangzhou Normal University Hangzhou 310036 China Hebei University Baoding 071002 China Helmholtz Institute Mainz Staudinger Weg 18 Mainz D-55099 Germany Henan Normal University Xinxiang 453007 China Henan University Kaifeng 475004 China Henan University of Science and Technology Luoyang 471003 China Henan University of Technology Zhengzhou 450001 China Huangshan College Huangshan 245000 China Hunan Normal University Changsha 410081 China Hunan University Changsha 410082 China Indian Institute of Technology Madras Chennai 600036 India Indiana University Bloomington 47405 IN United States INFN Laboratori Nazionali di Frascati Frascati I-00044 Italy INFN Sezione di Perugia Perugia I-06100 Italy University of Perugia Perugia I-06100 Italy INFN Sezione di Ferrara Ferrara I-44122 Italy University of Ferrara Ferrara I-44122 Italy Inner Mongolia University Hohhot 010021 China Institute of Modern Physics Lanzhou 730000 China Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar 13330 Mongolia Instituto de Alta Investigación Universidad de Tarapacá Casilla 7D Arica 100

By analyzing e+e− collision data with an integrated luminosity of 7.9 fb−1 collected with the BESIII detector at the center-of-mass energy of 3.773 GeV, the branching fraction of D+→ τ+ντ is determined as B = (9.9... 详细信息

By analyzing e⁺e⁻ collision data with an integrated luminosity of 7.9 fb⁻¹ collected with the BESIII detector at the center-of-mass energy of 3.773 GeV, the branching fraction of D⁺→ τ⁺ν_τ is determined as B = (9.9 ± 1.1_stat± 0.5_syst) × 10⁻⁴. Using the most precise result B(D⁺→ μ⁺ν_μ) = (3.981 ± 0.079_stat± 0.040_syst) × 10⁻⁴ [1], we determine R_τ/μ = Γ(D⁺ → τ⁺ν_τ)/Γ(D⁺ → μ⁺ν_μ) = 2.49 ± 0.31, achieving a factor of two improvement in precision compared to the previous BESIII result. This measurement is in agreement with the standard model prediction of lepton flavor universality within one standard deviation. © The Author(s) 2025.

关键词： Branching fraction Charm physics e+-e− Experiments Flavour physics

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Observation of ψ3686→K−Λ1520Ξ¯+ + c.c.

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Journal of High Energy physics 2025年第3期2025卷 1-17页

作者： Ablikim, M. Achasov, M.N. Adlarson, P. Afedulidis, O. Ai, X.C. Aliberti, R. Amoroso, A. An, Q. Bai, Y. Bakina, O. Balossino, I. Ban, Y. Bao, H.-R. Batozskaya, V. Begzsuren, K. Berger, N. Berlowski, M. Bertani, M. Bettoni, D. Bianchi, F. Bianco, E. Bortone, A. Boyko, I. Briere, R.A. Brueggemann, A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chai, X.Y. Chang, J.F. Che, G.R. Che, Y.Z. Chelkov, G. Chen, Chao Chen, C.H. Chen, G. Chen, H.S. Chen, H.Y. Chen, M.L. Chen, S.J. Chen, S.L. Chen, S.M. Chen, T. Chen, X.R. Chen, X.T. Chen, Y.B. Chen, Y.Q. Chen, Z.J. Choi, S.K. Cibinetto, G. Cossio, F. Cui, J.J. Dai, H.L. Dai, J.P. Dbeyssi, A. de Boer, R.E. Dedovich, D. Deng, C.Q. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. De Mori, F. Ding, B. Ding, X.X. Ding, Y. Dong, J. Dong, L.Y. Dong, M.Y. Dong, X. Du, M.C. Du, S.X. Duan, Y.Y. Duan, Z.H. Egorov, P. Fan, G.F. Fan, J.J. Fan, Y.H. Fang, J. Fang, S.S. Fang, W.X. Fang, Y.Q. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Feng, J.H. Feng, Y.T. Fritsch, M. Fu, C.D. Fu, J.L. Fu, Y.W. Gao, H. Gao, X.B. Gao, Y.N. Gao, Yang Garbolino, S. Garzia, I. Ge, P.T. Ge, Z.W. Geng, C. Gersabeck, E.M. Gilman, A. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Gramigna, S. Greco, M. Gu, M.H. Gu, Y.T. Guan, C.Y. Guo, A.Q. Guo, L.B. Guo, M.J. Guo, R.P. Guo, Y.P. Guskov, A. Gutierrez, J. Han, K.L. Han, T.T. Hanisch, F. Hao, X.Q. Harris, F.A. He, K.K. He, K.L. Heinsius, F.H. Heinz, C.H. Heng, Y.K. Herold, C. Holtmann, T. Hong, P.C. Hou, G.Y. Hou, X.T. Hou, Y.R. Hou, Z.L. Hu, B.Y. Hu, H.M. Hu, J.F. Hu, Q.P. Hu, S.L. Hu, T. Hu, Y. Huang, G.S. Huang, K.X. Huang, L.Q. Huang, P. Huang, X.T. Huang, Y.P. Huang, Y.S. Hussain, T. Hölzken, F. Hüsken, N. in der Wiesche, N. Jackson, J. Janchiv, S. Ji, Q. Ji, Q.P. Ji, W. Ji, X.B. Ji, X.L. Ji, Y.Y. Jia, X.Q. Jia, Z.K. Jiang, D. Jiang, H.B. Jiang, P.C. Jiang, S.S. Jiang, T.J. Jiang, X.S. Jiang, Y. Jiao, J.B. Jiao, J.K. Jiao, Z. Jin, S. Jin, Y. Jing, M.Q. Jing, X.M. Johansson, T. Kabana, S. Kalantar-Nayestanaki, N. Kang, X.L. Kang, X.S. Institute of High Energy Physics Beijing 100049 China Beihang University Beijing 100191 China Bochum Ruhr-University Bochum D-44780 Germany Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russian Federation Carnegie Mellon University Pittsburgh 15213 PA United States Central China Normal University Wuhan 430079 China Central South University Changsha 410083 China China Center of Advanced Science and Technology Beijing 100190 China China University of Geosciences Wuhan 430074 China Chung-Ang University Seoul 06974 South Korea COMSATS University Islamabad Lahore Campus Defence Road Off Raiwind Road Lahore 54000 Pakistan Fudan University Shanghai 200433 China GSI Helmholtzcentre for Heavy Ion Research GmbH Darmstadt D-64291 Germany Guangxi Normal University Guilin 541004 China Guangxi University Nanning 530004 China Hangzhou Normal University Hangzhou 310036 China Hebei University Baoding 071002 China Helmholtz Institute Mainz Staudinger Weg 18 Mainz D-55099 Germany Henan Normal University Xinxiang 453007 China Henan University Kaifeng 475004 China Henan University of Science and Technology Luoyang 471003 China Henan University of Technology Zhengzhou 450001 China Huangshan College Huangshan 245000 China Hunan Normal University Changsha 410081 China Hunan University Changsha 410082 China Indian Institute of Technology Madras Chennai 600036 India Indiana University Bloomington 47405 IN United States INFN Laboratori Nazionali di Frascati Frascati I-00044 Italy INFN Sezione di Perugia Perugia I-06100 Italy University of Perugia Perugia I-06100 Italy INFN Sezione di Ferrara Ferrara I-44122 Italy University of Ferrara Ferrara I-44122 Italy Inner Mongolia University Hohhot 010021 China Institute of Modern Physics Lanzhou 730000 China Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar 13330 Mongolia Instituto de Alta Investigación Universidad de Tarapacá Casilla 7D Arica 100

Based on (2712.4 ± 14.3) × 106ψ(3686) events collected at the BESIII detector operating at the BEPCII collider, we present the first observation of the decay ψ3686→K−Λ1520Ξ¯+ + c.c. The product bra... 详细信息

Based on (2712.4 ± 14.3) × 10⁶ψ(3686) events collected at the BESIII detector operating at the BEPCII collider, we present the first observation of the decay ψ3686→K−Λ1520Ξ¯+ + c.c. The product branching fraction Bψ3686→K−Λ1520Ξ¯++c.c.×BΛ1520→pK− is measured to be (9.47 ± 0.75 ± 0.97) × 10⁻⁷, where the first uncertainty is statistical and the second systematic. © The Author(s) 2025.

关键词： Branching fraction e+-e− Experiments QCD Quarkonium

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Study of the semileptonic decay D0→K¯0π−e+νe

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Journal of High Energy physics 2025年第3期2025卷 1-20页

作者： Ablikim, M. Achasov, M.N. Adlarson, P. Afedulidis, O. Ai, X.C. Aliberti, R. Amoroso, A. Bai, Y. Bakina, O. Balossino, I. Ban, Y. Bao, H.-R. Batozskaya, V. Begzsuren, K. Berger, N. Berlowski, M. Bertani, M. Bettoni, D. Bianchi, F. Bianco, E. Bortone, A. Boyko, I. Briere, R.A. Brueggemann, A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chai, X.Y. Chang, J.F. Che, G.R. Che, Y.Z. Chelkov, G. Chen, Chao Chen, C.H. Chen, G. Chen, H.S. Chen, H.Y. Chen, M.L. Chen, S.J. Chen, S.L. Chen, S.M. Chen, T. Chen, X.R. Chen, X.T. Chen, Y.B. Chen, Y.Q. Chen, Z.J. Choi, S.K. Cibinetto, G. Cossio, F. Cui, J.J. Dai, H.L. Dai, J.P. Dbeyssi, A. de Boer, R.E. Dedovich, D. Deng, C.Q. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. De Mori, F. Ding, B. Ding, X.X. Ding, Y. Dong, J. Dong, L.Y. Dong, M.Y. Dong, X. Du, M.C. Du, S.X. Duan, Y.Y. Duan, Z.H. Egorov, P. Fan, G.F. Fan, J.J. Fan, Y.H. Fang, J. Fang, S.S. Fang, W.X. Fang, Y. Fang, Y.Q. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Feng, J.H. Feng, Y.T. Fritsch, M. Fu, C.D. Fu, J.L. Fu, Y.W. Gao, H. Gao, X.B. Gao, Y.N. Gao, Yang Garbolino, S. Garzia, I. Ge, P.T. Ge, Z.W. Geng, C. Gersabeck, E.M. Gilman, A. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Gramigna, S. Greco, M. Gu, M.H. Gu, Y.T. Guan, C.Y. Guo, A.Q. Guo, L.B. Guo, M.J. Guo, R.P. Guo, Y.P. Guskov, A. Gutierrez, J. Han, K.L. Han, T.T. Hanisch, F. Hao, X.Q. Harris, F.A. He, K.K. He, K.L. Heinsius, F.H. Heinz, C.H. Heng, Y.K. Herold, C. Holtmann, T. Hong, P.C. Hou, G.Y. Hou, X.T. Hou, Y.R. Hou, Z.L. Hu, B.Y. Hu, H.M. Hu, J.F. Hu, Q.P. Hu, S.L. Hu, T. Hu, Y. Huang, G.S. Huang, K.X. Huang, L.Q. Huang, P. Huang, X.T. Huang, Y.P. Huang, Y.S. Hussain, T. Hölzken, F. Hüsken, N. in der Wiesche, N. Jackson, J. Janchiv, S. Ji, Q. Ji, Q.P. Ji, W. Ji, X.B. Ji, X.L. Ji, Y.Y. Jia, X.Q. Jia, Z.K. Jiang, D. Jiang, H.B. Jiang, P.C. Jiang, S.S. Jiang, T.J. Jiang, X.S. Jiang, Y. Jiao, J.B. Jiao, J.K. Jiao, Z. Jin, S. Jin, Y. Jing, M.Q. Jing, X.M. Johansson, T. Kabana, S. Kalantar-Nayestanaki, N. Kang, X.L. Kang, X.S Institute of High Energy Physics Beijing 100049 China Beihang University Beijing 100191 China Bochum Ruhr-University Bochum D-44780 Germany Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russian Federation Carnegie Mellon University Pittsburgh 15213 PA United States Central China Normal University Wuhan 430079 China Central South University Changsha 410083 China China Center of Advanced Science and Technology Beijing 100190 China China University of Geosciences Wuhan 430074 China Chung-Ang University Seoul 06974 South Korea COMSATS University Islamabad Lahore Campus Defence Road Off Raiwind Road Lahore 54000 Pakistan Fudan University Shanghai 200433 China GSI Helmholtzcentre for Heavy Ion Research GmbH Darmstadt D-64291 Germany Guangxi Normal University Guilin 541004 China Guangxi University Nanning 530004 China Hangzhou Normal University Hangzhou 310036 China Hebei University Baoding 071002 China Helmholtz Institute Mainz Staudinger Weg 18 Mainz D-55099 Germany Henan Normal University Xinxiang 453007 China Henan University Kaifeng 475004 China Henan University of Science and Technology Luoyang 471003 China Henan University of Technology Zhengzhou 450001 China Huangshan College Huangshan 245000 China Hunan Normal University Changsha 410081 China Hunan University Changsha 410082 China Indian Institute of Technology Madras Chennai 600036 India Indiana University Bloomington 47405 IN United States INFN Laboratori Nazionali di Frascati Frascati I-00044 Italy INFN Sezione di Perugia Perugia I-06100 Italy University of Perugia Perugia I-06100 Italy INFN Sezione di Ferrara Ferrara I-44122 Italy University of Ferrara Ferrara I-44122 Italy Inner Mongolia University Hohhot 010021 China Institute of Modern Physics Lanzhou 730000 China Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar 13330 Mongolia Instituto de Alta Investigación Universidad de Tarapacá Casilla 7D Arica 100

We report an improved study of the semileptonic decay D0→K¯0π−e+νe based on a sample of 7.9 fb−1 of e+e− annihilation data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector at the BEPC... 详细信息

We report an improved study of the semileptonic decay D0→K¯0π−e+νe based on a sample of 7.9 fb⁻¹ of e⁺e⁻ annihilation data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector at the BEPCII collider. The branching fraction of this decay is measured to be BD0→K¯0π−e+νe = (1.444 ± 0.022_stat ± 0.024_syst)%, which is the most precise to date, where the first uncertainty is statistical and the second is systematic. Based on investigation of the decay dynamics, we find that the decay is dominated by the K^*(892)⁻ component and present an improved measurement of its branching fraction to be BD0→K∗892−e+νe = (2.039 ± 0.032_stat± 0.034_syst)%. We also determine the ratios of the hadronic form factors for the K^*(892)⁻e⁺ν_e decay to be r_V = V(0)/A₁(0) = 1.48 ± 0.05_stat± 0.02_syst and r₂ = A₂(0)/A₁(0) = 0.70 ± 0.04_stat± 0.02_syst, where V(0) is the vector form factor and A_1,2(0) are the axial form factors. In addition, the K¯0π−S-wave component is found to account for (5.87 ± 0.32_stat± 0.16_syst)% of the total decay rate, corresponding to a branching fraction of BD0→K¯0π−S−wavee+νe = (0.085 ± 0.005_stat± 0.003_syst)%. © The Author(s) 2025.

关键词： Charm physics e+-e− Experiments

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Measurement of cross sections of e+e−→KS0KS0ψ3686 from s = 4.682 to 4.951 GeV

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Journal of High Energy physics 2025年第2期2025卷 1-21页

The process e+e−→KS0KS0ψ3686 is studied by analyzing e+e− collision data samples collected at eight center-of-mass energies ranging from 4.682 to 4.951 GeV with the BESIII detector operating at the BEPCII collider, ... 详细信息

The process e+e−→KS0KS0ψ3686 is studied by analyzing e⁺e⁻ collision data samples collected at eight center-of-mass energies ranging from 4.682 to 4.951 GeV with the BESIII detector operating at the BEPCII collider, corresponding to an integrated luminosity of 4.1 fb⁻¹. Observation of the e+e−→KS0KS0ψ3686 process is found for the first time with a statistical significance of 6.3σ, and the cross sections at each center-of-mass energy are measured. The ratio of cross sections of e+e−→KS0KS0ψ3686 relative to e⁺e⁻→ K⁺K⁻ψ(3686) is determined to be σe+e−→KS0KS0ψ3686σe+e−→K+K−ψ3686=0.45±0.25, which is consistent with the prediction based on isospin symmetry. The uncertainty includes both statistical and systematic contributions. Additionally, the KS0ψ3686 invariant mass distribution is found to be consistent with three-body phase space. The significance of a contribution beyond three-body phase space is only 0.8σ. © The Author(s) 2025.

关键词： e+-e− Experiments Exotics

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A modification of Faddeev–Popov approach free from Gribov ambiguity

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Communications in Theoretical physics 2020年第12期72卷 137-144页

作者： Chong-yao Chen Fei Gao Yu-Xin Liu Department of Physics and State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China Center for High Energy Physics Peking UniversityBeijing 100871China Institut fur Theoretische Physik Universitaet HeidelbergPhilosophenweg 1669120 HeidelbergGermany

We propose a modified version of the Faddeev–Popov(FP)quantization approach for nonAbelian gauge field theory to avoid Gribov *** show that by means of introducing a new method of inserting the correct identity into the Yang–Mills generating functional and considering the identity generated by an integral through a subgroup of the gauge group,the problem of Gribov ambiguity can be removed *** by handling the absolute value of the FP determinant with the method introduced by Williams and collaborators,we lift the Jacobian determinant together with the absolute value and obtain a local *** new Lagrangian will have a nilpotent symmetry which can be viewed as an analog of the Becchi–Rouet–Stora–Tyutin symmetry.

关键词： QCD quantization scheme Gribov copy non-Abelian field theory

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在自旋关联的■体系中对Ξ0→Λy衰变的测量（英文）

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Science Bulletin 2025年第4期 454-459页

作者： M. Ablikim M.N. Achasov P. Adlarson O. Afedulidis X.C. Ai R. Aliberti A. Amoroso Q. An Y. Bai O. Bakina I. Balossino Y. Ban H.-R. Bao V. Batozskaya K. Begzsuren N. Berger M. Berlowski M. Bertani D. Bettonia F. Bianchi E. Bianco A. Bortone I. Boyko R.A. Briere A. Brueggemann H. Cai X. Cai A. Calcaterra G.F. Cao N. Cao S.A. Cetin J.F. Chang G.R. Che G. Chelkov C. Chen C.H. Chen Chao Chen G. Chen H.S. Chen H.Y. Chen M.L. Chen S.J. Chen S.L. Chen S.M. Chen T. Chen X.R. Chen X.T. Chen Y.B. Chen Y.Q. Chen Z.J. Chen Z.Y. Chen S.K. Choi G. Cibinetto F. Cossio J.J. Cui H.L. Dai J.P. Dai A. Dbeyssi R.E. de Boer D. Dedovich C.Q. Deng Z.Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori B. Ding X.X. Ding Y. Ding Y. Ding J. Dong L.Y. Dong M.Y. Dong X. Dong M.C. Du S.X. Du Y.Y. Duan Z.H. Duan P. Egorov Y.H. Fan J. Fang J. Fang S.S. Fang W.X. Fang Y. Fang Y.Q. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C.Q. Feng J.H. Feng Y.T. Feng M. Fritsch C.D. Fu J.L. Fu Y.W. Fu H. Gao X.B. Gao Y.N. Gao Yang Gao S. Garbolino I. Garzia L. Ge P.T. Ge Z.W. Ge C. Geng E.M. Gersabeck A. Gilman K. Goetzen L. Gong W.X. Gong W. Gradl S. Gramigna M. Greco M.H. Gu Y.T. Gu C.Y. Guan A.Q. Guo L.B. Guo M.J. Guo R.P. Guo Y.P. Guo A. Guskov J. Gutierrez K.L. Han T.T. Han F. Hanisch X.Q. Hao F.A. Harris K.K. He K.L. He F.H. Heinsius C.H. Heinz Y.K. Heng C. Herold T. Holtmann P.C. Hong G.Y. Hou X.T. Hou Y.R. Hou Z.L. Hou B.Y. Hu H.M. Hu J.F. Hu S.L. Hu T. Hu Y. Hu G.S. Huang K.X. Huang L.Q. Huang X.T. Huang Y.P. Huang Y.S. Huang T. Hussain F. H?lzken N. Hüsken N. in der Wiesche J. Jackson S. Janchiv J.H. Jeong Q. Ji Q.P. Ji W. Ji X.B. Ji X.L. Ji Y.Y. Ji X.Q. Jia Z.K. Jia D. Jiang H.B. Jiang P.C. Jiang S.S. Jiang T.J. Jiang X.S. Jiang Y. Jiang J.B. Jiao J.K. Jiao Z. Jiao S. Jin Y. Jin M.Q. Jing X.M. Jing T. Johansson S. Kabana N. Kalantar-Nayestanaki X.L. Kang X.S. Kang M. Kavatsyuk B.C. Ke V. Khachatryan A. Khoukaz R. Kiuchi O.B. Kolcu B. Kopf M. Kuessner X. Kui N. Kumar A. Kupsc W. Kühn J.J. Lane L. Lavezzi T.T. Lei Z.H. Lei M. Lellmann T. Lenz C BESⅢ合作组 Institute of High Energy Physics Budker Institute of Nuclear Physics SB RAS (BINP) Also at the Novosibirsk State University Uppsala University Bochum Ruhr-University Zhengzhou University Johannes Gutenberg University of Mainz University of Turin and INFN University of Turin University of Turin and INFN University of Science and Technology of China State Key Laboratory of Particle Detection and Electronics Southeast University Joint Institute for Nuclear Research INFN Sezione di Ferrara Peking University Also at State Key Laboratory of Nuclear Physics and Technology Peking University University of Chinese Academy of Sciences National Centre for Nuclear Research Institute of Physics and Technology National Centre for Nuclear Research INFN Laboratori Nazionali di Frascati University of Turin and INFN Carnegie Mellon University University of Muenster Wuhan University State Key Laboratory of Particle Detection and Electronics University of Chinese Academy of Sciences Turkish Accelerator Center Particle Factory Group Istinye University Nankai University Also at the Moscow Institute of Physics and Technology China University of Geosciences Soochow University Henan University University of Chinese Academy of Sciences Nanjing University North China Electric Power University Tsinghua University Institute of Modern Physics Jilin University Hunan University Also at School of Physics and Electronics Hunan University Chung-Ang University INFN Sezione di Ferrara University of Ferrara Shandong University Yunnan University Helmholtz Institute Mainz University of South China University of Jinan Also at State Key Laboratory of Nuclear Physics and Technology Peking University Liaoning University Sun Yat-sen University University of Turin and INFN University of Eastern Piedmont Nanjing Normal University Henan Normal University University of Manchester University of Oxford GSI Helmholtzcentre for Heavy Ion Research GmbH Guangxi University Shandong Normal University Fudan University Also at Key Laboratory of Nuclear Phys

The ground-state hyperons have played a crucial role in the understanding of weak interactions. However, numerous unanswered questions persist regarding the weak decay mechanisms and the role of hyperons in non-perturbative quantum chromodynamics(QCD). Specifically, weak radiative hyperon decays(WRHDs) provide valuable insights into the nature of nonleptonic weak interactions.

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Search for the lepton number violation decay ϕ→π^(+)π^(+)e^(−)e^(−)via J/ψ→ϕη^(*)

引用

Chinese physics C 2025年第4期49卷 1-10页

作者： M.Ablikim M.N.Achasov P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Amoroso M.R.An Q.An Y.Bai O.Bakina I.Balossino Y.Ban H.-R.Bao V.Batozskaya K.Begzsuren N.Berger M.Berlowski M.Bertani D.Bettoni F.Bianchi E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggemann H.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin J.F.Chang G.R.Che Y.Z.Che G.Chelkov C.Chen Chao Chen G.Chen H.S.Chen M.L.Chen S.J.Chen S.L.Chen S.M.Chen T.Chen X.R.Chen X.T.Chen Y.B.Chen Y.Q.Chen Z.J.Chen Z.Y.Chen S.K.Choi G.Cibinetto S.C.Coen F.Cossio J.J.Cui H.L.Dai J.P.Dai A.Dbeyssi R.E.de Boer D.Dedovich Z.Y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori B.Ding X.X.Ding Y.Ding Y.Ding J.Dong L.Y.Dong M.Y.Dong X.Dong M.C.Du S.X.Du Z.H.Duan P.Egorov Y.H.Fan J.Fang S.S.Fang W.X.Fang Y.Fang Y.Q.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng J.H.Feng K.Fischer M.Fritsch C.D.Fu J.L.Fu Y.W.Fu H.Gao Y.N.Gao Yang Gao S.Garbolino I.Garzia L.Ge P.T.Ge Z.W.Ge C.Geng E.M.Gersabeck A.Gilman K.Goetzen L.Gong W.X.Gong W.Gradl S.Gramigna M.Greco M.H.Gu Y.T.Gu C.Y.Guan A.Q.Guo L.B.Guo M.J.Guo R.P.Guo Y.P.Guo A.Guskov J.Gutierrez T.T.Han W.Y.Han X.Q.Hao F.A.Harris K.K.He K.L.He F.H.Heinsius C.H.Heinz Y.K.Heng C.Herold T.Holtmann P.C.Hong G.Y.Hou X.T.Hou Y.R.Hou Z.L.Hou B.Y.Hu H.M.Hu J.F.Hu T.Hu Y.Hu G.S.Huang K.X.Huang L.Q.Huang X.T.Huang Y.P.Huang T.Hussain F.Hölzken N.Hüsken N.in der Wiesche J.Jackson S.Jaeger S.Janchiv Q.Ji Q.P.Ji X.B.Ji X.L.Ji Y.Y.Ji X.Q.Jia Z.K.Jia H.B.Jiang P.C.Jiang S.S.Jiang T.J.Jiang X.S.Jiang Y.Jiang J.B.Jiao Z.Jiao S.Jin Y.Jin M.Q.Jing X.M.Jing T.Johansson S.Kabana N.Kalantar-Nayestanaki X.L.Kang X.S.Kang M.Kavatsyuk B.C.Ke V.Khachatryan A.Khoukaz R.Kiuchi R.Kliemt O.B.Kolcu B.Kopf M.Kuessner X.Kui N.Kumar A.Kupsc W.Kühn J.J.Lane P.Larin A.Lavania L.Lavezzi T.T.Lei Z.H.Lei M.Lellmann T.Lenz C.Li C.Li C.H.Li Cheng Li D.M.Li F.Li G.Li H.B.Li H.J.Li H.N.Li Hui Li J.R.Li J.S.Li J.W.Li K.Li K.L.Li L.J.Li L.K.Li Lei Li M.H.Li P.R.Li Q.X.Li S.X.Li T.Li W.D.Li W.G.Li X.H.Li X.L.Li X.Y.Li Y.G.Li Z.J.Li Z.X.Li C.Liang H.Liang H.Liang Y.F.Liang Y.T.Lia Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Bochum Ruhr-University D-44780 BochumGermany Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China Central South University Changsha 410083China China Center of Advanced Science and Technology Beijing 100190China China University of Geosciences Wuhan 430074China Chung-Ang University Seoul06974Republic of Korea COMSATS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China Henan University of Science and Technology Luoyang 471003China Henan University of Technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan Normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INFN Laboratori Nazionali di Frascati INFN Sezione di PerugiaI-06100PerugiaItaly INFN Laboratori Nazionali di Frascati University of PerugiaI-06100PerugiaItaly INFN Sezione di Ferrara INFN Sezione di FerraraI-44122FerraraItaly INFN Sezione di Ferrara University of FerraraI-44122FerraraItaly Inner Mongolia University Hohhot 010021China Institute of Modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de Alta Investigación Universida

Using an electron-positron collision data sample corresponding to(1.0087±0.0044)×10^(10)events collected using the BESIII detector at the BEPCII collider,we firstly search for the lepton number violation decayφ→π^(+)π^(+)e^(-)e^(-)via J/ψ→φη.No obviously signals are *** upper limit on the branching fraction ofφ→π^(+)π^(+)e^(-)e^(-)is set to be 1.3×10^(-5)at the 90%confidence level.

关键词： Lepton number violation matter anti-matter asymmetry neutrinoless double beta decay

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PICOSEC Micromegas Precise-timing Detectors: Development towards Large-Area and Integration

arXiv

引用

arXiv 2025年

作者： Meng, Y. Aleksan, R. Angelis, Y. Bortfeldt, J. Brunbauer, F. Brunoldi, M. Chatzianagnostou, E. Datta, J. Degmelt, K. Fanourakis, G. Fiorina, D. Floethner, K.J. Gallinaro, M. Garcia, F. Giomataris, I. Gnanvo, K. Iguaz, F.J. Janssens, D. Kallitsopoulou, A. Kovacic, M. Kross, B. Legou, P. Li, Z. Lisowska, M. Liu, J. Ma, Y. Maniatis, I. McKisson, J. Muller, H. Oliveri, E. Orlandini, G. Pandey, A. Papaevangelou, T. Pomorski, M. Ropolewski, L. Sampsonidis, D. Scharenberg, L. Schneider, T. Sohl, L. van Stenis, M. Tsipolitis, Y. Tzamarias, S.E. Utrobicic, A. Vai, I. Veenhof, R. Vitulo, P. Wang, X. White, S. Xi, W. Zhang, Z. Zhao, L. Zhou, Y. State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei230026 China Department of Modern Physics University of Science and Technology of China Hefei230026 China IRFU CEA Université Paris-Saclay Gif-sur-YvetteF-91191 France Department of Physics Aristotle University of Thessaloniki University Campus ThessalonikiGR-54124 Greece Department for Medical Physics Ludwig Maximilian University of Munich Am Coulombwall 1 Garching85748 Germany GeneveCH-1211 23 Switzerland Dipartimento di Fisica Università di Pavia Via Bassi 6 IT Pavia27100 Italy INFN Sezione di Pavia Via Bassi 6 IT Pavia27100 Italy Stony Brook University Dept. of Physics and Astronomy Stony BrookNY11794-3800 United States Jefferson Lab 12000 Jefferson Avenue Newport NewsVA23606 United States Institute of Nuclear and Particle Physics NCSR Demokritos Agia Paraskevi AttikiGR-15341 Greece Helmholtz-Institut für Strahlen- und Kernphysik University of Bonn Nußallee 14–16 Bonn53115 Germany Laboratório de Instrumentacão e Física Experimental de Partículas Lisbon Portugal Faculty of Electrical Engineering and Computing University of Zagreb Zagreb10000 Croatia Université Paris-Saclay Gif-sur-YvetteF-91191 France Physikalisches Institut University of Bonn Nußallee 12 Bonn53115 Germany Friedrich-Alexander-Universität Erlangen-Nürnberg Schloßplatz 4 Erlangen91054 Germany CEA-LIST Diamond Sensors Laboratory CEA Saclay Gif-sur-YvetteF-91191 France Thessaloniki57001 Greece National Technical University of Athens Athens Greece Ruđer Bošković Institute Bijenička cesta 54 Zagreb10000 Croatia University of Virginia VA United States

PICOSEC Micromegas (MM) is a precise timing gaseous detector based on a Cherenkov radiator coupled with a semi-transparent photocathode and an MM amplifying structure. The detector conceprt was successfully demonstrated through a single-channel prototype, achieving sub-25 ps time resolution with Minimum Ionizing Particles (MIPs). A series of studies followed, aimed at developing robust, large-area, and scalable detectors with high time resolution, complemented by specialized fast-response readout electronics. This work presents recent advancements towards large-area resistive PICOSEC MM, including 10 × 10 cm2 area prototypes and a 20 × 20 cm2 prototype, which features the jointing of four photocathodes. The time resolution of these detector prototypes was tested during the test beam, achieved a timing performance of around 25 ps for individual pads in MIPs. Meanwhile, customized electronics have been developed dedicated to the high-precision time measurement of the large-area PICOSEC MM. The performance of the entire system was evaluated during the test beam, demonstrating its capability for large-area integration. These advancements highlight the potential of PICOSEC MM to meet the stringent requirements of future particle physics experiments. Copyright © 2025, The Authors. All rights reserved.

关键词： Photocathodes

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QCD equation of state and thermodynamic observables from computationally minimal Dyson-Schwinger equations

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Physical Review D 2024年第1期110卷 014036-014036页

作者： Yi Lu Fei Gao Yu-xin Liu Jan M. Pawlowski Department of Physics and State Key Laboratory of Nuclear Physics and Technology School of Physics Center for High Energy Physics Beijing 100871 China Institut für Theoretische Physik Universität Heidelberg Philosophenweg 16 69120 Heidelberg Germany ExtreMe Matter Institute EMMI

We study the QCD equation of state and other thermodynamic observables including the isentropic trajectories and the speed of sound. These observables are of eminent importance for the understanding of experimental results in heavy ion collisions and also provide a QCD input for studies of the timeline of heavy-ion-collisions with hydrodynamical simulations. They can be derived from the quark propagator whose gap equation is solved within a minimal approximation to the Dyson-Schwinger equations (DSEs) of QCD at finite temperature and density. This minimal approximation aims at a combination of computational efficiency and simplification of the truncation scheme while maintaining quantitative precision. This minimal DSE scheme is confronted and benchmarked with results for correlation functions and observables from lattice QCD at vanishing density and quantitative functional approaches at finite density.

关键词： Color deconfinement Finite temperature field theory QCD phase transitions Quark-gluon plasma Schwinger-Dyson equations Chiral symmetry

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Dielectric theorem within the Hartree-Fock-Bogoliubov framework

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Physical Review C 2009年第5期79卷 054329-054329页

作者： Luigi Capelli Gianluca Colò Jun Li Dipartimento di Fisica and INFN Sez. di Milano via Celoria 16 20133 Milano Italy School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University 100871 Beijing People's Republic of China

Excitation spectra usually reveal important features of the many-body systems. The vibrational excitations can be studied through the well-known linear response theory. This theory is realized, in the nuclear case, by means of the random-phase approximation (RPA); the generalization in the case in which one deals with open shells, and the pairing force is active, is the quasiparticle RPA (QRPA). It is useful to have at one's disposal theorems that provide information on, e.g., the sum rules and mean excitation energies associated with given external operators acting on the system. This article focuses on such theorems in the case of self-consistent QRPA based on Hartree-Fock-Bogoliubov (HFB). In particular, the so-called dielectric theorem that provides the value of the inverse-energy-weighted sum rule based on the simple knowledge of the ground state is demonstrated. This theorem is applied to the case of constrained calculations of the average excitation energy of the monopole resonance combined with the Thouless theorem. The pairing correlations are shown to have the effect of increasing the polarizability m−1. The detailed analysis of the profile of the strength functions by mean of QRPA reveals that the decrease of the average monopole excitation energies in some isotopes is associated with neutron states that emerge at an energy that is lower than the main giant resonance peak.

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