检索结果-内蒙古大学图书馆

arXiv 2018年

作者： Ablikim, M. Achasov, M.N. Ahmed, S. Albrecht, M. Amoroso, A. An, F.F. An, Q. Bai, Y. Bakina, O. Baldini Ferroli, R. Ban, Y. Bennett, D.W. Bennett, J.V. Berger, N. Bertani, M. Bettoni, D. Bian, J.M. Bianchi, F. Boger, E. Boyko, I. Briere, R.A. Cai, H. Cai, X. Cakir, O. Calcaterra, A. Cao, G.F. Cetin, S.A. Chai, J. Chang, J.F. Chelkov, G. Chen, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, P.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chen, Z.C. Chu, X.K. Cibinetto, G. Dai, H.L. Dai, J.P. Dbeyssi, A. Dedovich, D. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. de Mori, F. Ding, Y. Dong, C. Dong, J. Dong, L.Y. Dong, M.Y. Dou, Z.L. Du, S.X. Duan, P.F. Fang, J. Fang, S.S. Fang, X. Fang, Y. Farinelli, R. Fava, L. Fegan, S. Feldbauer, F. Felici, G. Feng, C.Q. Fioravanti, E. Fritsch, M. Fu, C.D. Gao, Q. Gao, X.L. Gao, Y. Gao, Y.G. Gao, Z. Garzia, I. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Greco, M. Gu, M.H. Gu, S. Gu, Y.T. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Haddadi, Z. Han, S. Hao, X.Q. Harris, F.A. He, K.L. He, X.Q. Heinsius, F.H. Held, T. Heng, Y.K. Holtmann, T. Hou, Z.L. Hu, C. Hu, H.M. Hu, T. Hu, Y. Huang, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Hussain, T. Ikegami Andersson, W. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Jiang, X.S. Jiang, X.Y. Jiao, J.B. Jiao, Z. Jin, D.P. Jin, S. Jin, Y. Johansson, T. Julin, A. Kalantar-Nayestanaki, N. Kang, X.L. Kang, X.S. Kavatsyuk, M. Ke, B.C. Khan, T. Khoukaz, A. Kiese, P. Kliemt, R. Koch, L. Kolcu, O.B. Kopf, B. Kornicer, M. Kuemmel, M. M., Kuessner M., Kuhlmann A., Kupsc W., Kühn J.S., Lange M., Lara P., Larin L., Lavezzi S., Leiber H., Leithoff C., Leng C., Li C., Li D.M., Li F., Li F.Y., Li G., Li H.B., Li H.J., Li J.C., Li K.J., Li K., Li K., Li L., Li P.L., Li P.R., Li Q.Y., Li T., Li W.D., Li W.G., Li X.L., Li Institute of High Energy Physics Beijing100049 China Beihang University Beijing100191 China Beijing Institute of Petrochemical Technology Beijing102617 China Bochum Ruhr-University BochumD-44780 Germany Carnegie Mellon University PittsburghPA15213 United States Central China Normal University Wuhan430079 China China Center of Advanced Science and Technology Beijing100190 China COMSATS Institute of Information Technology Lahore Defence Road Off Raiwind Road Lahore54000 Pakistan Novosibirsk630090 Russia GSI Helmholtzcentre for Heavy Ion Research GmbH DarmstadtD-64291 Germany Guangxi Normal University Guilin541004 China Guangxi University Nanning530004 China Hangzhou Normal University Hangzhou310036 China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Henan Normal University Xinxiang453007 China Henan University of Science and Technology Luoyang471003 China Huangshan College Huangshan245000 China Hunan University Changsha410082 China Indiana University BloomingtonIN47405 United States INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN and University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Dubna Moscow region141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany KVI-CART University of Groningen GroningenNL-9747 AA Netherlands Lanzhou University Lanzhou730000 China Liaoning University Shenyang110036 China Nanjing Normal University Nanjing210023 China Nanjing University Nanjing210093 China Nankai University Tianjin300071 China Peking University Beijing100871 China Seoul National University Seoul151-747 Korea Republic

An amplitude analysis of the KSKS system produced in radiative J/ψ decays is performed using the (1310.6±7.0)×106 J/ψ decays collected by the BESIII detector. Two approaches are presented. A mass-dependent analysis is performed by parameterizing the KSKS invariant mass spectrum as a sum of Breit-Wigner line shapes. Additionally, a mass-independent analysis is performed to extract a piecewise function that describes the dynamics of the KSKS system while making minimal assumptions about the properties and number of poles in the amplitude. The dominant amplitudes in the mass-dependent analysis include the f0(1710), f0(2200), and f20(1525). The mass-independent results, which are made available as input for further studies, are consistent with those of the mass-dependent analysis and are useful for a systematic study of hadronic interactions. The branching fraction of radiative J/ψ decays to KSKS is measured to be (8.1±0.4)×10−4, where the uncertainty is systematic and the statistical uncertainty is negligible. Copyright © 2018, The Authors. All rights reserved.

关键词： Mass spectrometry

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Observation of the semileptonic decay D0 → a0(980)−e+νe and evidence for D+ → a0(980)0e+νe

arXiv

引用

arXiv 2018年

作者： Ablikim, M. Achasov, M.N. Ahmed, S. Albrecht, M. Amoroso, A. An, F.F. An, Q. Bai, J.Z. Bai, Y. Bakina, O. Baldini Ferroli, R. Ban, Y. Bennett, D.W. Bennett, J.V. Berger, N. Bertani, M. Bettoni, D. Bian, J.M. Bianchi, F. Boger, E. Boyko, I. Briere, R.A. Cai, H. Cai, X. Cakir, O. Calcaterra, A. Cao, G.F. Cetin, S.A. Chai, J. Chang, J.F. Chelkov, G. Chen, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chu, X.K. Cibinetto, G. Dai, H.L. Dai, J.P. Dbeyssi, A. Dedovich, D. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. de Mori, F. Ding, Y. Dong, C. Dong, J. Dong, L.Y. Dong, M.Y. Dorjkhaidav, O. Dou, Z.L. Du, S.X. Duan, P.F. Fang, J. Fang, S.S. Fang, X. Fang, Y. Farinelli, R. Fava, L. Fegan, S. Feldbauer, F. Felici, G. Feng, C.Q. Fioravanti, E. Fritsch, M. Fu, C.D. Gao, Q. Gao, X.L. Gao, Y. Gao, Y.G. Gao, Z. Garzia, I. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Greco, M. Gu, M.H. Gu, S. Gu, Y.T. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Haddadi, Z. Han, S. Hao, X.Q. Harris, F.A. He, K.L. Heinsius, F.H. Held, T. Heng, Y.K. Holtmann, T. Hou, Z.L. Hu, C. Hu, H.M. Hu, T. Hu, Y. Huang, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Hussain, T. Ikegami Andersson, W. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Jiang, X.S. Jiang, X.Y. Jiao, J.B. Jiao, Z. Jin, D.P. Jin, S. Jin, Y. Johansson, T. Julin, A. Kalantar-Nayestanaki, N. Kang, X.L. Kang, X.S. Kavatsyuk, M. Ke, B.C. Khan, T. Khoukaz, A. Kiese, P. Kliemt, R. Koch, L. Kolcu, O.B. Kopf, B. Kornicer, M. Kuemmel, M. Kuhlmann, M. Kupsc, A. Kühn, W. Lange, J.S. Lara, M. Larin, P. Lavezzi, L. Leithoff, H. Leng, C. Li, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, Jin Li, K. Li, K. Li, K.J. Li, Lei Li, P.L. Li, P.R. Li, Q.Y. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.N. Li, X.Q. Institute of High Energy Physics Beijing100049 China Beihang University Beijing100191 China Beijing Institute of Petrochemical Technology Beijing102617 China Bochum Ruhr-University BochumD-44780 Germany Carnegie Mellon University PittsburghPA15213 United States Central China Normal University Wuhan430079 China China Center of Advanced Science and Technology Beijing100190 China COMSATS Institute of Information Technology Lahore Defence Road Off Raiwind Road Lahore54000 Pakistan Novosibirsk630090 Russia GSI Helmholtzcentre for Heavy Ion Research GmbH DarmstadtD-64291 Germany Guangxi Normal University Guilin541004 China Guangxi University Nanning530004 China Hangzhou Normal University Hangzhou310036 China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Henan Normal University Xinxiang453007 China Henan University of Science and Technology Luoyang471003 China Huangshan College Huangshan245000 China Hunan University Changsha410082 China Indiana University BloomingtonIN47405 United States INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Dubna Moscow region141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany KVI-CART University of Groningen GroningenNL-9747 AA Netherlands Lanzhou University Lanzhou730000 China Liaoning University Shenyang110036 China Nanjing Normal University Nanjing210023 China Nanjing University Nanjing210093 China Nankai University Tianjin300071 China Peking University Beijing100871 China Seoul National University Seoul151-747 Korea Republic of

Using an e+e− collision data sample of 2.93 fb−1 collected at a center-of-mass energy of 3.773 GeV by the BESIII detector at BEPCII, we report the observation of D0 → a0(980)−e+νe and evidence for D+ → a0(980)0e+νe with significances of 6.4σ and 2.9σ, respectively. The absolute branching fractions are determined to be B(D0 → a0(980)−e+νe)×B(a0(980)− → ηπ−) = (1.33+0−0..3329(stat)±0.09(syst))×10−4 and B(D+ → a0(980)0e+νe) × B(a0(980)0 → ηπ0) = (1.66+0−0..8166(stat) ± 0.11(syst)) × 10−4. An upper limit of B(D+ → a0(980)0e+νe) × B(a0(980)0 → ηπ0) −4 is also determined at the 90% confidence level. Copyright © 2018, The Authors. All rights reserved.

关键词： Germanium alloys

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Observation of h1(1380) in the J=ψ → η0KK¯ π decay

arXiv

引用

arXiv 2018年

作者： Ablikim, M. Achasov, M.N. Ahmed, S. Albrecht, M. Amoroso, A. An, F.F. An, Q. Bai, J.Z. Bai, Y. Bakina, O. Ferroli, R. Baldini Ban, Y. Bennett, D.W. Bennett, J.V. Berger, N. Bertani, M. Bettoni, D. Bian, J.M. Bianchi, F. Boger, E. Boyko, I. Briere, R.A. Cai, H. Cai, X. Cakir, O. Calcaterra, A. Cao, G.F. Cetin, S.A. Chai, J. Chang, J.F. Chelkov, G. Chen, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, P.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chu, X.K. Cibinetto, G. Dai, H.L. Dai, J.P. Dbeyssi, A. Dedovich, D. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. de Mori, F. Ding, Y. Dong, C. Dong, J. Dong, L.Y. Dong, M.Y. Dou, Z.L. Du, S.X. Duan, P.F. Fang, J. Fang, S.S. Fang, Y. Farinelli, R. Fava, L. Fegan, S. Feldbauer, F. Felici, G. Feng, C.Q. Fioravanti, E. Fritsch, M. Fu, C.D. Gao, Q. Gao, X.L. Gao, Y. Gao, Y.G. Gao, Z. Garzia, I. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Greco, M. Gu, M.H. Gu, Y.T. Guo, A.Q. Guo, R.P. Guo, Y.P. Haddadi, Z. Han, S. Hao, X.Q. Harris, F.A. He, K.L. He, X.Q. Heinsius, F.H. Held, T. Heng, Y.K. Holtmann, T. Hou, Z.L. Hu, H.M. Hu, T. Hu, Y. Huang, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Hussain, T. Andersson, W. Ikegami Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Jiang, X.S. Jiang, X.Y. Jiao, J.B. Jiao, Z. Jin, D.P. Jin, S. Jin, Y. Johansson, T. Julin, A. Kalantar-Nayestanaki, N. Kang, X.L. Kang, X.S. Kavatsyuk, M. Ke, B.C. Khan, T. Khoukaz, A. Kiese, P. Kliemt, R. Koch, L. Kolcu, O.B. Kopf, B. Kornicer, M. Kuemmel, M. Kuessner, M. Kuhlmann, M. Kupsc, A. Kühn, W. Lange, J.S. Lara, M. Larin, P. Lavezzi, L. Leithoff, H. Leng, C. Li, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, Jin Li, K.J. Li, Kang Li, Ke Li, Lei Li, P.L. Li, P.R. Li, Q.Y. Li, W.D. Li, W.G. Li, X.L. Li, X.N. Li, X.Q. Li, Z.B. Liang, H. Liang, Y.F. Institute of High Energy Physics Beijing100049 China Beihang University Beijing100191 China Beijing Institute of Petrochemical Technology Beijing102617 China Bochum Ruhr-University BochumD-44780 Germany Carnegie Mellon University PittsburghPA15213 United States Central China Normal University Wuhan430079 China China Center of Advanced Science and Technology Beijing100190 China COMSATS Institute of Information Technology Lahore Defence Road Off Raiwind Road Lahore54000 Pakistan Novosibirsk630090 Russia GSI Helmholtzcentre for Heavy Ion Research GmbH DarmstadtD-64291 Germany Guangxi Normal University Guilin541004 China Guangxi University Nanning530004 China Hangzhou Normal University Hangzhou310036 China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Henan Normal University Xinxiang453007 China Henan University of Science and Technology Luoyang471003 China Huangshan College Huangshan245000 China Hunan University Changsha410082 China Indiana University BloomingtonIN47405 United States INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN and University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Dubna Moscow region141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany KVI-CART University of Groningen GroningenNL-9747 AA Netherlands Lanzhou University Lanzhou730000 China Liaoning University Shenyang110036 China Nanjing Normal University Nanjing210023 China Nanjing University Nanjing210093 China Nankai University Tianjin300071 China Peking University Beijing100871 China Seoul National University Seoul151-747 Korea Republic

Using 1.31 × 109 J=ψ events collected by the BESIII detector at the BEPCII eþe− collider, we report the first observation of the h1ð1380Þ in J=ψ → η0h1ð1380Þ with a significance of mo...

Using 1.31 × 109 J=ψ events collected by the BESIII detector at the BEPCII eþe− collider, we report the first observation of the h1ð1380Þ in J=ψ → η0h1ð1380Þ with a significance of more than ten standard deviations. The mass and width of the possible axial-vector strangeonium candidate h1ð1380Þ are measured to be M ¼ ð1423.2 2.1 7.3Þ MeV=c2 and Γ ¼ ð90.3 9.8 17.5Þ MeV. The product branching fractions, assuming no interference, are determined to be BðJ=ψ → η0h1ð1380ÞÞ × Bðh1ð1380Þ → K*ð892ÞþK− þ c:c:Þ ¼ ð1.51 0.09 0.21Þ × 10−4 in η0KþK−π0 mode and BðJ=ψ → η0h1ð1380ÞÞ × Bðh1ð1380Þ → K*ð892ÞK¯ þ c:c:Þ ¼ ð2.16 0.12 0.29Þ × 10−4 in η0K0SKπ mode. The first uncertainties are statistical and the second are systematic. Isospin symmetry violation is observed in the decays h1ð1380Þ → K*ð892ÞþK− þ c:c: and h1ð1380Þ → K*ð892Þ0K¯ 0 þ c:c:. Based on the measured h1ð1380Þ mass, the mixing angle between the states h1ð1170Þ and h1ð1380Þ is determined to be ð35.9 2.6Þ°, consistent with theoretical expectations. Copyright © 2018, The Authors. All rights reserved.

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Study of the decays D+ → η(0)e+νe

arXiv

引用

arXiv 2018年

作者： Ablikim, M. Achasov, M.N. Ahmed, S. Albrecht, M. Amoroso, A. An, F.F. An, Q. Bai, Y. Bakina, O. Baldini Ferroli, R. Ban, Y. Bennett, D.W. Bennett, J.V. Berger, N. Bertani, M. Bettoni, D. Bian, J.M. Bianchi, F. Boger, E. Boyko, I. Briere, R.A. Cai, H. Cai, X. Cakir, O. Calcaterra, A. Cao, G.F. Cetin, S.A. Chai, J. Chang, J.F. Chelkov, G. Chen, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, P.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chu, X.K. Cibinetto, G. Dai, H.L. Dai, J.P. Dbeyssi, A. Dedovich, D. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. de Mori, F. Ding, Y. Dong, C. Dong, J. Dong, L.Y. Dong, M.Y. Dou, Z.L. Du, S.X. Duan, P.F. Fang, J. Fang, S.S. Fang, X. Fang, Y. Farinelli, R. Fava, L. Fegan, S. Feldbauer, F. Felici, G. Feng, C.Q. Fioravanti, E. Fritsch, M. Fu, C.D. Gao, Q. Gao, X.L. Gao, Y. Gao, Y.G. Gao, Z. Garzia, I. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Greco, M. Gu, M.H. Gu, S. Gu, Y.T. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Haddadi, Z. Han, S. Hao, X.Q. Harris, F.A. He, K.L. He, X.Q. Heinsius, F.H. Held, T. Heng, Y.K. Holtmann, T. Hou, Z.L. Hu, C. Hu, H.M. Hu, T. Hu, Y. Huang, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Hussain, T. Ikegami, W. Andersson Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Jiang, X.S. Jiang, X.Y. Jiao, J.B. Jiao, Z. Jin, D.P. Jin, S. Jin, Y. Johansson, T. Julin, A. Kalantar-Nayestanaki, N. Kang, X.L. Kang, X.S. Kavatsyuk, M. Ke, B.C. Khan, T. Khoukaz, A. Kiese, P. Kliemt, R. Koch, L. Kolcu, O.B. Kopf, B. Kornicer, M. Kuemmel, M. Kuessner, M. Kuhlmann, M. Kupsc, A. Kühn, W. Lange, J.S. Lara, M. Larin, P. Lavezzi, L. Leiber, S. Leithoff, H. Leng, C. Li, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, K.J. Li, Kang Li, Ke Li, Lei Li, P.L. Li, P.R. Li, Q.Y. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.N. Institute of High Energy Physics Beijing100049 China Beihang University Beijing100191 China Beijing Institute of Petrochemical Technology Beijing102617 China Bochum Ruhr-University BochumD-44780 Germany Carnegie Mellon University PittsburghPA15213 United States Central China Normal University Wuhan430079 China China Center of Advanced Science and Technology Beijing100190 China COMSATS Institute of Information Technology Lahore Defence Road Off Raiwind Road Lahore54000 Pakistan Novosibirsk630090 Russia GSI Helmholtzcentre for Heavy Ion Research GmbH DarmstadtD-64291 Germany Guangxi Normal University Guilin541004 China Guangxi University Nanning530004 China Hangzhou Normal University Hangzhou310036 China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Henan Normal University Xinxiang453007 China Henan University of Science and Technology Luoyang471003 China Huangshan College Huangshan245000 China Hunan University Changsha410082 China Indiana University BloomingtonIN47405 United States INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Dubna Moscow Region141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany KVI-CART University of Groningen GroningenNL-9747 AA Netherlands Lanzhou University Lanzhou730000 China Liaoning University Shenyang110036 China Nanjing Normal University Nanjing210023 China Nanjing University Nanjing210093 China Nankai University Tianjin300071 China Peking University Beijing100871 China Seoul National University Seoul151-747 Korea Republic o

The charm semileptonic decays D+ → ηe+νe and D+ → η0e+νe are studied with a sample of e+e− collision data corresponding to an integrated luminosity of 2.93 fb−1 collected at √s = 3.773 GeV with the BESIII detector. We measure the branching fractions for D+ → ηe+νe to be (10.74 ± 0.81 ± 0.51) × 10−4, and for D+ → η0e+νe to be (1.91 ± 0.51 ± 0.13) × 10−4, where the uncertainties are statistical and systematic, respectively. In addition, we perform a measurement of the form factor in the decay D+ → ηe+νe. All the results are consistent with those obtained by the CLEO-c experiment. Copyright © 2018, The Authors. All rights reserved.

关键词： Approximation theory

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Determination of the pseudoscalar decay constant fDs+ via Ds+ → µ+νµ

arXiv

引用

arXiv 2018年

作者： Ablikim, M. Achasov, M.N. Ahmed, S. Albrecht, M. Alekseev, M. Amoroso, A. An, F.F. An, Q. Bai, Y. Bakina, O. Ferroli, R. Baldini Ban, Y. Begzsuren, K. Bennett, D.W. Bennett, J.V. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Boyko, I. Briere, R.A. Cai, H. Cai, X. Cakir, O. Calcaterra, A. Cao, G.F. Cetin, S.A. Chai, J. Chang, J.F. Chang, W.L. Chelkov, G. Chen, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, P.L. Chen, S.J. Chen, Y.B. Cibinetto, G. Cossio, F. Dai, H.L. Dai, J.P. Dbeyssi, A. Dedovich, D. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. Mori, F. De Ding, Y. Dong, C. Dong, J. Dong, L.Y. Dong, M.Y. Dou, Z.L. Du, S.X. Duan, P.F. Fan, J.Z. Fang, J. Fang, S.S. Fang, Y. Farinelli, R. Fava, L. Fegan, S. Feldbauer, F. Felici, G. Feng, C.Q. Fritsch, M. Fu, C.D. Fu, Y. Gao, Q. Gao, X.L. Gao, Y. Gao, Y.G. Gao, Z. Garillon, B. Garzia, I. Gilman, A. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Greco, M. Gu, L.M. Gu, M.H. Gu, Y.T. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Guskov, A. Haddadi, Z. Han, S. Hao, X.Q. Harris, F.A. He, K.L. Heinsius, F.H. Held, T. Heng, Y.K. Holtmann, T. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Hussain, T. Andersson, W. Ikegami Irshad, M. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Jiang, X.S. Jiang, X.Y. Jiao, J.B. Jiao, Z. Jin, D.P. Jin, S. Jin, Y. Johansson, T. Julin, A. Kalantar-Nayestanaki, N. Kang, X.S. Kavatsyuk, M. Ke, B.C. Khan, T. Khoukaz, A. Kiese, P. Kliemt, R. Koch, L. Kolcu, O.B. Kopf, B. Kornicer, M. Kuemmel, M. Kuessner, M. Kupsc, A. Kurth, M. Kühn, W. Lange, J.S. Lara, M. Larin, P. Lavezzi, L. Leiber, S. Leithoff, H. Li, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, J.W. Li, Ke Li, Lei Li, P.L. Li, P.R. Li, Q.Y. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.N. Institute of High Energy Physics Beijing100049 China Beihang University Beijing100191 China Beijing Institute of Petrochemical Technology Beijing102617 China Bochum Ruhr-University BochumD-44780 Germany Carnegie Mellon University PittsburghPA15213 United States Central China Normal University Wuhan430079 China China Center of Advanced Science and Technology Beijing100190 China COMSATS University Islamabad Lahore Campus Defence Road Off Raiwind Road Lahore54000 Pakistan Novosibirsk630090 Russia GSI Helmholtzcentre for Heavy Ion Research GmbH DarmstadtD-64291 Germany Guangxi Normal University Guilin541004 China Guangxi University Nanning530004 China Hangzhou Normal University Hangzhou310036 China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Henan Normal University Xinxiang453007 China Henan University of Science and Technology Luoyang471003 China Huangshan College Huangshan245000 China Hunan Normal University Changsha410081 China Hunan University Changsha410082 China Indian Institute of Technology Madras Chennai600036 India Indiana University BloomingtonIN47405 United States INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN and University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Dubna Moscow region141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany KVI-CART University of Groningen GroningenNL-9747 AA Netherlands Lanzhou University Lanzhou730000 China Liaoning University Shenyang110036 China Nanjing Normal University Nanjing210023 China Nanjing University Nanjing210093 China Nankai University Tianjin300071 Chi

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Search for baryon and lepton number violation in J/ψ → Λ+c e− + c.c.

arXiv

引用

arXiv 2018年

作者： Ablikim, M. Achasov, M.N. Ahmed, S. Albrecht, M. Amoroso, A. An, F.F. An, Q. Bai, J.Z. Bai, Y. Bakina, O. Baldini Ferroli, R. Ban, Y. Bennett, D.W. Bennett, J.V. Berger, N. Bertani, M. Bettoni, D. Bian, J.M. Bianchi, F. Boger, E. Boyko, I. Briere, R.A. Cai, H. Cai, X. Cakir, O. Calcaterra, A. Cao, G.F. Cetin, S.A. Chai, J. Chang, J.F. Chelkov, G. Chen, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, P.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chu, X.K. Cibinetto, G. Dai, H.L. Dai, J.P. Dbeyssi, A. Dedovich, D. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. De Mori, F. Ding, Y. Dong, C. Dong, J. Dong, L.Y. Dong, M.Y. Dou, Z.L. Du, S.X. Duan, P.F. Fang, J. Fang, S.S. Fang, X. Fang, Y. Farinelli, R. Fava, L. Fegan, S. Feldbauer, F. Felici, G. Feng, C.Q. Fioravanti, E. Fritsch, M. Fu, C.D. Gao, Q. Gao, X.L. Gao, Y. Gao, Y.G. Gao, Z. Garzia, I. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Greco, M. Gu, M.H. Gu, S. Gu, Y.T. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Haddadi, Z. Han, S. Hao, X.Q. Harris, F.A. He, K.L. He, X.Q. Heinsius, F.H. Held, T. Heng, Y.K. Holtmann, T. Hou, Z.L. Hu, C. Hu, H.M. Hu, T. Hu, Y. Huang, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Hussain, T. Ikegami Andersson, W. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Jiang, X.S. Jiang, X.Y. Jiao, J.B. Jiao, Z. Jin, D.P. Jin, S. Jin, Y. Johansson, T. Julin, A. Kalantar-Nayestanaki, N. Kang, X.L. Kang, X.S. Kavatsyuk, M. Ke, B.C. Khan, T. Khoukaz, A. Kiese, P. Kliemt, R. Koch, L. Kolcu, O.B. Kopf, B. Kornicer, M. Kuemmel, M. Kuessner, M. Kuhlmann, M. Kupsc, A. Kühn, W. Lange, J.S. Lara, M. Larin, P. Lavezzi, L. Leiber, S. Leithoff, H. Leng, C. Li, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, J.Q. Li, K.J. Li, Kang Li, Ke Li, Lei Li, P.L. Li, P.R. Li, Q.Y. Li, T. Li, W.D. Li, W.G. Institute of High Energy Physics Beijing100049 China Beihang University Beijing100191 China Beijing Institute of Petrochemical Technology Beijing102617 China Bochum Ruhr-University BochumD-44780 Germany Carnegie Mellon University PittsburghPA15213 United States Central China Normal University Wuhan430079 China China Center of Advanced Science and Technology Beijing100190 China COMSATS Institute of Information Technology Lahore Defence Road Off Raiwind Road Lahore54000 Pakistan Novosibirsk630090 Russia GSI Helmholtzcentre for Heavy Ion Research GmbH DarmstadtD-64291 Germany Guangxi Normal University Guilin541004 China Guangxi University Nanning530004 China Hangzhou Normal University Hangzhou310036 China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Henan Normal University Xinxiang453007 China Henan University of Science and Technology Luoyang471003 China Huangshan College Huangshan245000 China Hunan University Changsha410082 China Indiana University BloomingtonIN47405 United States INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN and University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Dubna Moscow region141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany KVI-CART University of Groningen Groningen9747 AA Netherlands Lanzhou University Lanzhou730000 China Liaoning University Shenyang110036 China Nanjing Normal University Nanjing210023 China Nanjing University Nanjing210093 China Nankai University Tianjin300071 China Peking University Beijing100871 China Seoul National University Seoul151-747 Korea Republic of

Using 1.31 × 109 J/ψ events collected by the BESIII detector at the Beijing Electron Positron Collider, we search for the process J/ψ → Λ+c e− + c.c. for the first time. In this process, both baryon and lepton number conservation is violated. No signal is found and the upper limit on the branching fraction B(J/ψ → Λ+c e− + c.c.) is set to be 6.9 × 10−8 at the 90% Confidence Level. Copyright © 2018, The Authors. All rights reserved.

关键词： Hadrons

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Measurement of absolute branching fraction of the inclusive decay Λ+c → Λ + X

arXiv

引用

arXiv 2018年

作者： Ablikim, M. Achasov, M.N. Ahmed, S. Albrecht, M. Alekseev, M. Amoroso, A. An, F.F. An, Q. Bai, J.Z. Bai, Y. Bakina, O. Baldini Ferroli, R. Ban, Y. Bennett, D.W. Bennett, J.V. Berger, N. Bertani, M. Bettoni, D. Bian, J.M. Bianchi, F. Boger, E. Boyko, I. Briere, R.A. Cai, H. Cai, X. Cakir, O. Calcaterra, A. Cao, G.F. Cetin, S.A. Chai, J. Chang, J.F. Chelkov, G. Chen, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, P.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chu, X.K. Cibinetto, G. Dai, H.L. Dai, J.P. Dbeyssi, A. Dedovich, D. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. De Mori, F. Ding, Y. Dong, C. Dong, J. Dong, L.Y. Dong, M.Y. Dou, Z.L. Du, S.X. Duan, P.F. Fang, J. Fang, S.S. Fang, X. Fang, Y. Farinelli, R. Fava, L. Fegan, S. Feldbauer, F. Felici, G. Feng, C.Q. Fioravanti, E. Fritsch, M. Fu, C.D. Gao, Q. Gao, X.L. Gao, Y. Gao, Y.G. Gao, Z. Garillon, B. Garzia, I. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Greco, M. Gu, M.H. Gu, S. Gu, Y.T. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Haddadi, Z. Han, S. Hao, X.Q. Harris, F.A. He, K.L. He, X.Q. Heinsius, F.H. Held, T. Heng, Y.K. Holtmann, T. Hou, Z.L. Hu, C. Hu, H.M. Hu, T. Hu, Y. Huang, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Hussain, T. Ikegami Andersson, W. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Jiang, X.S. Jiang, X.Y. Jiao, J.B. Jiao, Z. Jin, D.P. Jin, S. Jin, Y. Johansson, T. Julin, A. Kalantar-Nayestanaki, N. Kang, X.L. Kang, X.S. Kavatsyuk, M. Ke, B.C. Khan, T. Khoukaz, A. Kiese, P. Kliemt, R. Koch, L. Kolcu, O.B. Kopf, B. Kornicer, M. Kuemmel, M. Kuessner, M. Kuhlmann, M. Kupsc, A. Kühn, W. Lange, J.S. Lara, M. Larin, P. Lavezzi, L. Leiber, S. Leithoff, H. Leng, C. Li, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, K.J. Li, Kang Li, Ke Li, Lei Li, P.L. Li, P.R. Li, Q.Y. Li, T. Institute of High Energy Physics Beijing100049 China Beihang University Beijing100191 China Beijing Institute of Petrochemical Technology Beijing102617 China Bochum Ruhr-University BochumD-44780 Germany Carnegie Mellon University PittsburghPA15213 United States Central China Normal University Wuhan430079 China China Center of Advanced Science and Technology Beijing100190 China COMSATS Institute of Information Technology Lahore Defence Road Off Raiwind Road Lahore54000 Pakistan Novosibirsk630090 Russia GSI Helmholtzcentre for Heavy Ion Research GmbH DarmstadtD-64291 Germany Guangxi Normal University Guilin541004 China Guangxi University Nanning530004 China Hangzhou Normal University Hangzhou310036 China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Henan Normal University Xinxiang453007 China Henan University of Science and Technology Luoyang471003 China Huangshan College Huangshan245000 China Hunan University Changsha410082 China Indiana University BloomingtonIN47405 United States INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN and University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Dubna Moscow region141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany KVI-CART University of Groningen Groningen9747 AA Netherlands Lanzhou University Lanzhou730000 China Liaoning University Shenyang110036 China Nanjing Normal University Nanjing210023 China Nanjing University Nanjing210093 China Nankai University Tianjin300071 China Peking University Beijing100871 China Seoul National University Seoul151-747 Korea Republic of

Based on an e+e− collision data sample corresponding to an integrated luminosity of 567 pb−1 taken at the center-of-mass energy of √s = 4.6 GeV with the BESIII detector, we measure the absolute branching fraction of the inclusive decay Λ+c → Λ + X to be B(Λ+c → Λ + X) = (38.2+2−2..82 ± 0.8)% using the double-tag method, where X refers to any possible final state particles. In addition, we search for direct CP violation in the charge asymmetry of this inclusive decay for the first time, and obtain ACP ≡ BB(Λ(Λ+c+c→→Λ+Λ+XX ) )+−BB ((ΛΛ¯¯−c−c →→Λ+Λ+¯¯ XX ) ) = (2.1+7−6..06 ± 1.4)%, a statistically limited result with no evidence of CP violation. Copyright © 2018, The Authors. All rights reserved.

关键词： Supersymmetry

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Measurement of singly cabibbo-suppressed decays D0 → π0π0π0, π0π0η, π0ηη and ηηη

arXiv

引用

arXiv 2018年

作者： Ablikim, M. Achasov, M.N. Ahmed, S. Albrecht, M. Amoroso, A. An, F.F. An, Q. Bai, J.Z. Bai, Y. Bakina, O. Baldini Ferroli, R. Ban, Y. Bennett, D.W. Bennett, J.V. Berger, N. Bertani, M. Bettoni, D. Bian, J.M. Bianchi, F. Boger, E. Boyko, I. Briere, R.A. Cai, H. Cai, X. Cakir, O. Calcaterra, A. Cao, G.F. Cetin, S.A. Chai, J. Chang, J.F. Chelkov, G. Chen, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, P.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chu, X.K. Cibinetto, G. Dai, H.L. Dai, J.P. Dbeyssi, A. Dedovich, D. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. De Mori, F. Ding, Y. Dong, C. Dong, J. Dong, L.Y. Dong, M.Y. Dou, Z.L. Du, S.X. Duan, P.F. Fang, J. Fang, S.S. Fang, Y. Farinelli, R. Fava, L. Fegan, S. Feldbauer, F. Felici, G. Feng, C.Q. Fioravanti, E. Fritsch, M. Fu, C.D. Gao, Q. Gao, X.L. Gao, Y. Gao, Y.G. Gao, Z. Garillon, B. Garzia, I. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Greco, M. Gu, M.H. Gu, Y.T. Guo, A.Q. Guo, R.P. Guo, Y.P. Haddadi, Z. Han, S. Hao, X.Q. Harris, F.A. He, K.L. He, X.Q. Heinsius, F.H. Held, T. Heng, Y.K. Holtmann, T. Hou, Z.L. Hu, H.M. Hu, T. Hu, Y. Huang, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Hussain, T. Ikegami Andersson, W. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Jiang, X.S. Jiang, X.Y. Jiao, J.B. Jiao, Z. Jin, D.P. Jin, S. Jin, Y. Johansson, T. Julin, A. Kalantar-Nayestanaki, N. Kang, X.L. Kang, X.S. Kavatsyuk, M. Ke, B.C. Khan, T. Khoukaz, A. Kiese, P. Kliemt, R. Koch, L. Kolcu, O.B. Kopf, B. Kornicer, M. Kuemmel, M. Kuessner, M. Kuhlmann, M. Kupsc, A. Kühn, W. Lange, J.S. Lara, M. Larin, P. Lavezzi, L. Leithoff, H. Leng, C. Li, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, Jin Li, K.J. Li, Kang Li, Ke Li, Lei Li, P.L. Li, P.R. Li, Q.Y. Li, W.D. Li, W.G. Li, X.L. Li, X.N. Li, X.Q. Li, Z.B. Liang, H. Institute of High Energy Physics Beijing100049 China Beihang University Beijing100191 China Beijing Institute of Petrochemical Technology Beijing102617 China Bochum Ruhr-University BochumD-44780 Germany Carnegie Mellon University PittsburghPA15213 United States Central China Normal University Wuhan430079 China China Center of Advanced Science and Technology Beijing100190 China COMSATS Institute of Information Technology Lahore Defence Road Off Raiwind Road Lahore54000 Pakistan Novosibirsk630090 Russia GSI Helmholtzcentre for Heavy Ion Research GmbH DarmstadtD-64291 Germany Guangxi Normal University Guilin541004 China Guangxi University Nanning530004 China Hangzhou Normal University Hangzhou310036 China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Henan Normal University Xinxiang453007 China Henan University of Science and Technology Luoyang471003 China Huangshan College Huangshan245000 China Hunan University Changsha410082 China Indiana University BloomingtonIN47405 United States INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN and University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Dubna Moscow region141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany KVI-CART University of Groningen Groningen9747 AA Netherlands Lanzhou University Lanzhou730000 China Liaoning University Shenyang110036 China Nanjing Normal University Nanjing210023 China Nanjing University Nanjing210093 China Nankai University Tianjin300071 China Peking University Beijing100871 China Seoul National University Seoul151-747 Korea Republic of

Using a data sample of e+e− collision data corresponding to an integrated luminosity of 2.93 fb−1 collected with the BESIII detector at a center-of-mass energy of √s = 3.773 GeV, we search for the singly Cabibbo-suppressed decays D0 → π0π0π0, π0π0η, π0ηη and ηηη using the double tag method. The absolute branching fractions are measured to be B(D0 → π0π0π0) = (2.0 ± 0.4 ± 0.3) × 10−4, B(D0 → π0π0η) = (3.8 ± 1.1 ± 0.7) × 10−4 and B(D0 → π0ηη) = (7.3 ± 1.6 ± 1.5) × 10−4 with the statistical significances of 4.8σ, 3.8σ and 5.5σ, respectively, where the first uncertainties are statistical and the second ones systematic. No significant signal of D0 → ηηη is found, and the upper limit on its decay branching fraction is set to be B(D0 → ηηη) −4 at the 90% confidence level. Copyright © 2018, The Authors. All rights reserved.

关键词： Germanium alloys

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First measurement of e+e− → pKS0n̅K− + c.c. above open charm threshold

arXiv

引用

arXiv 2018年

作者： Ablikim, M. Achasov, M.N. Ahmed, S. Albrecht, M. Alekseev, M. Amoroso, A. An, F.F. An, Q. Bai, J.Z. Bai, Y. Bakina, O. Baldini Ferroli, R. Ban, Y. Begzsuren, K. Bennett, D.W. Bennett, J.V. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Boger, E. Boyko, I. Briere, R.A. Cai, H. Cai, X. Cakir, O. Calcaterra, A. Cao, G.F. Cetin, S.A. Chai, J. Chang, J.F. Chelkov, G. Chen, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, P.L. Chen, S.J. Chen, X.R. Chen, Y.B. Cheng, W. Chu, X.K. Cibinetto, G. Cossio, F. Dai, H.L. Dai, J.P. Dbeyssi, A. Dedovich, D. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. de Mori, F. Ding, Y. Dong, C. Dong, J. Dong, L.Y. Dong, M.Y. Dou, Z.L. Du, S.X. Duan, P.F. Fang, J. Fang, S.S. Fang, Y. Farinelli, R. Fava, L. Fegan, S. Feldbauer, F. Felici, G. Feng, C.Q. Fioravanti, E. Fritsch, M. Fu, C.D. Gao, Q. Gao, X.L. Gao, Y. Gao, Y.G. Gao, Z. Garillon, B. Garzia, I. Gilman, A. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Greco, M. Gu, L.M. Gu, M.H. Gu, Y.T. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Guskov, A. Haddadi, Z. Han, S. Hao, X.Q. Harris, F.A. He, K.L. He, X.Q. Heinsius, F.H. Held, T. Heng, Y.K. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Hussain, T. Ikegami Andersson, W. Irshad, M. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Jiang, X.S. Jiang, X.Y. Jiao, J.B. Jiao, Z. Jin, D.P. Jin, S. Jin, Y. Johansson, T. Julin, A. Kalantar-Nayestanaki, N. Kang, X.S. Kavatsyuk, M. Ke, B.C. Keshk, I.K. Khan, T. Khoukaz, A. Kiese, P. Kiuchi, R. Kliemt, R. Koch, L. Kolcu, O.B. Kopf, B. Kornicer, M. Kuemmel, M. Kuessner, M. Kupsc, A. Kurth, M. Kühn, W. Lange, J.S. Larin, P. Lavezzi, L. Leiber, S. Leithoff, H. Li, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, J.W. Li, K.J. Li, Kang Li, Ke Li, Lei Institute of High Energy Physics Beijing100049 China Beihang University Beijing100191 China Beijing Institute of Petrochemical Technology Beijing102617 China Bochum Ruhr-University BochumD-44780 Germany Carnegie Mellon University PittsburghPA15213 United States Central China Normal University Wuhan430079 China China Center of Advanced Science and Technology Beijing100190 China COMSATS Institute of Information Technology Lahore Defence Road Off Raiwind Road Lahore54000 Pakistan Fudan University Shanghai200443 China Novosibirsk630090 Russia GSI Helmholtzcentre for Heavy Ion Research GmbH DarmstadtD-64291 Germany Guangxi Normal University Guilin541004 China Guangxi University Nanning530004 China Hangzhou Normal University Hangzhou310036 China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Henan Normal University Xinxiang453007 China Henan University of Science and Technology Luoyang471003 China Huangshan College Huangshan245000 China Hunan Normal University Changsha410081 China Hunan University Changsha410082 China Indian Institute of Technology Madras Chennai600036 India Indiana University BloomingtonIN47405 United States INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN and University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Dubna Moscow region141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany KVI-CART University of Groningen GroningenNL-9747 AA Netherlands Lanzhou University Lanzhou730000 China Liaoning University Shenyang110036 China Nanjing Normal University Nanjing210023 China Nanjing University Nanjing210

The process e+e− → pKS0 n̅K− + c.c. and its intermediate processes are studied for the first time, using data samples collected with the BESIII detector at BEPCII at center-of-mass energies of 3.773, 4.008, 4.226, 4.258, 4.358, 4.416, and 4.600 GeV, with a total integrated luminosity of 7.4 fb−1. The Born cross section of e+e− → pKS0 n̅K− + c.c. is measured at each center-of-mass energy, but no significant resonant structure in the measured cross-section line shape between 3.773 and 4.600 GeV is observed. No evident structure is detected in the pK−, nKS0 , pKS0 , nK+, pn̅, or KS0 K− invariant mass distributions except for Λ(1520). The Born cross sections of e+e− → Λ(1520)¯ nKS0 + c.c. and e+e− → Λ(1520)¯ pK+ + c.c. are measured, and the 90% confidence level upper limits on the Born cross sections of e+e− → Λ(1520)Λ(1520) ¯ are determined at the seven center-of-mass energies. There is an evident difference in line shape and magnitude of the measured cross sections between e+e− → Λ(1520)(→ pK−)n̅KS0 and e+e− → pK−Λ(1520)(→ n̅K S0 ). Copyright © 2018, The Authors. All rights reserved.

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Observation of the W-Annihilation Decay Ds+ → ωπ+ and Evidence for Ds+ → ωK+

arXiv

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arXiv 2018年

作者： Ablikim, M. Achasov, M.N. Ahmed, S. Albrecht, M. Alekseev, M. Amoroso, A. An, F.F. An, Q. Bai, J.Z. Bai, Y. Bakina, O. Ferroli, R. Baldini Ban, Y. Begzsuren, K. Bennett, J.V. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Boger, E. Boyko, I. Briere, R.A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chai, J. Chang, J.F. Chelkov, G. Chen, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, S.J. Chen, X.R. Chen, Y.B. Cheng, W. Chu, X.K. Cibinetto, G. Cossio, F. Cui, X.F. Dai, H.L. Dai, J.P. Dbeyssi, A. Dedovich, D. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. de Mori, F. Ding, Y. Dong, C. Dong, J. Dong, L.Y. Dong, M.Y. Du, S.X. Fang, J. Fang, S.S. Fang, Y. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Fritsch, M. Fu, C.D. Gao, Q. Gao, X.L. Gao, Y. Gao, Y. Gao, Y.G. Gao, Z. Garillon, B. Garzia, I. Gilman, A. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Greco, M. Gu, M.H. Gu, Y.T. Guo, A.Q. Guo, R.P. Guo, Y.P. Guskov, A. Han, S. Hao, X.Q. Harris, F.A. He, K.L. He, X.Q. Heinsius, F.H. Held, T. Heng, Y.K. Hou, Y.R. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, J.S. Huang, X.T. Huang, Z.L. Hussain, T. Andersson, W. Ikegami Imoehl, W. Irshad, M. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Jiang, X.S. Jiang, X.Y. Jiao, J.B. Jiao, Z. Jin, D.P. Jin, S. Jin, Y. Johansson, T. Kalantar-Nayestanaki, N. Kang, X.S. Kappert, R. Kavatsyuk, M. Ke, B.C. Keshk, I.K. Khan, T. Khoukaz, A. Kiese, P. Kiuchi, R. Kliemt, R. Koch, L. Kolcu, O.B. Kopf, B. Kuemmel, M. Kuessner, M. Kupsc, A. Kurth, M. Kurth, M.G. Kühn, W. Lange, J.S. Larin, P. Lavezzi, L. Leithoff, H. Li, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, J.W. Li, Jin Li, K.J. Li, Kang Li, Ke Li, L.K. Li, Lei Li, P.L. Li, P.R. Li, Q.Y. Li, W.D. Li, W.G. Li, X.L. Li, X.N. Institute of High Energy Physics Beijing100049 China Beihang University Beijing100191 China Beijing Institute of Petrochemical Technology Beijing102617 China Bochum Ruhr-University BochumD-44780 Germany Carnegie Mellon University PittsburghPA15213 United States Central China Normal University Wuhan430079 China China Center of Advanced Science and Technology Beijing100190 China COMSATS Institute of Information Technology Lahore Defence Road Off Raiwind Road Lahore54000 Pakistan Fudan University Shanghai200443 China Novosibirsk630090 Russia GSI Helmholtzcentre for Heavy Ion Research GmbH DarmstadtD-64291 Germany Guangxi Normal University Guilin541004 China Guangxi University Nanning530004 China Hangzhou Normal University Hangzhou310036 China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Henan Normal University Xinxiang453007 China Henan University of Science and Technology Luoyang471003 China Huangshan College Huangshan245000 China Hunan Normal University Changsha410081 China Hunan University Changsha410082 China Indian Institute of Technology Madras Chennai600036 India Indiana University BloomingtonIN47405 United States INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Dubna Moscow region141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany KVI-CART University of Groningen GroningenNL-9747 AA Netherlands Lanzhou University Lanzhou730000 China Liaoning University Shenyang110036 China Nanjing Normal University Nanjing210023 China Nanjing University Nanjing210093

We report on the observation of the W -annihilation decay (Formula presented) and the evidence for (Formula presented) with a data sample corresponding to an integrated luminosity of 3.19 fb−1 collected with the BESIII detector at the center-of-mass energy √s = 4.178 GeV. We obtain the branching fractions (Formula presented), respectively. Copyright © 2018, The Authors. All rights reserved.

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