Precise Measurement of the e plus e- → D plus s D- s Cross Sections at Center-of-Mass Energies from Threshold to 4.95 GeV

被引：46

作者：

Ablikim, M. ^{[1
]}

Achasov, M. N. ^{[5
,91
]}

Adlarson, P. ^{[83
]}

Ai, X. C. ^{[89
]}

Aliberti, R. ^{[39
]}

Amoroso, A. ^{[61
,62
,79
,80
,82
]}

An, M. R. ^{[43
]}

An, Q. ^{[61
,62
,76
]}

Bai, Y. ^{[60
]}

Bakina, O. ^{[40
]}

Balossino, I. ^{[32
]}

Ban, Y. ^{[50
,99
]}

Batozskaya, V. ^{[1
,48
]}

Begzsuren, K. ^{[36
]}

Berger, N. ^{[39
]}

Berlowski, M. ^{[48
]}

Bertani, M. ^{[29
]}

Bettoni, D. ^{[32
]}

Bianchi, F. ^{[79
,80
,82
]}

Bianco, E. ^{[79
,80
,82
]}

Bortone, A. ^{[79
,80
,82
]}

Boyko, I. ^{[40
]}

Briere, R. A. ^{[6
]}

Brueggemann, A. ^{[73
]}

Cai, H. ^{[84
]}

Cai, X. ^{[1
,61
,62
]}

Calcaterra, A. ^{[29
]}

Cao, G. F. ^{[1
,68
]}

Cao, N. ^{[1
,68
]}

Cetin, S. A. ^{[66
]}

Chang, J. F. ^{[1
,61
,62
]}

Chang, T. T. ^{[85
]}

Chang, W. L. ^{[1
,68
]}

Che, G. R. ^{[47
]}

Chelkov, G. ^{[40
,90
]}

Chen, C. ^{[47
]}

Chen, Chao ^{[58
]}

Chen, G. ^{[1
]}

Chen, H. S. ^{[1
,68
]}

Chen, M. L. ^{[1
,61
,62
,68
]}

Chen, S. J. ^{[46
]}

Chen, S. M. ^{[65
]}

Chen, T. ^{[1
,68
]}

Chen, X. R. ^{[35
,68
]}

Chen, X. T. ^{[1
,68
]}

Chen, Y. B. ^{[1
,61
,62
]}

Chen, Y. Q. ^{[38
]}

Chen, Z. J. ^{[26
,100
]}

Cheng, W. S. ^{[82
]}

Choi, S. K. ^{[11
]}

机构：

[1] Inst High Energy Phys, Beijing 100049, Peoples R China

[2] Beihang Univ, Beijing 100191, Peoples R China

[3] Beijing Inst Petrochem Technol, Beijing 102617, Peoples R China

[4] Bochum Ruhr Univ, D-44780 Bochum, Germany

[5] Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia

[6] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[7] Cent China Normal Univ, Wuhan 430079, Peoples R China

[8] Cent South Univ, Changsha 410083, Peoples R China

[9] China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China

[10] China Univ Geosci, Wuhan 430074, Peoples R China

[11] Chung Ang Univ, Seoul 06974, South Korea

[12] COMSATS Univ Islamabad, Lahore Campus,Def Rd,Raiwind Rd, Lahore, Pakistan

[13] Fudan Univ, Shanghai 200433, Peoples R China

[14] GSI Helmholtzctr Heavy Ion Res GmbH, D-64291 Darmstadt, Germany

[15] Guangxi Normal Univ, Guilin 541004, Peoples R China

[16] Guangxi Univ, Nanning 530004, Peoples R China

[17] Hangzhou Normal Univ, Hangzhou 310036, Peoples R China

[18] Hebei Univ, Baoding 071002, Peoples R China

[19] Helmholtz Inst Mainz, Staudinger Weg 18, D-55099 Mainz, Germany

[20] Henan Normal Univ, Xinxiang 453007, Henan, Peoples R China

[21] Henan Univ, Kaifeng 475004, Peoples R China

[22] Henan Univ Sci & Technol, Luoyang 471003, Peoples R China

[23] Henan Univ Technol, Zhengzhou 450001, Peoples R China

[24] Huangshan Coll, Huangshan 245000, Peoples R China

[25] Hunan Normal Univ, Changsha 410081, Peoples R China

[26] Hunan Univ, Changsha 410082, Peoples R China

[27] Indian Inst Technol Madras, Chennai 600036, Tamil Nadu, India

[28] Indiana Univ, Bloomington, IN 47405 USA

[29] INFN Lab Nazl Frascati, I-00044 Frascati, Italy

[30] INFN Sez Perugia, I-06100 Perugia, Italy

[31] Univ Perugia, I-06100 Perugia, Italy

[32] INFN Sez Ferrara, I-44122 Ferrara, Italy

[33] Univ Ferrara, I-44122 Ferrara, Italy

[34] Inner Mongolia Univ, Hohhot 010021, Peoples R China

[35] Inst Modern Phys, Lanzhou 730000, Peoples R China

[36] Inst Phys & Technol, Peace Ave 54B, Ulaanbaatar 13330, Mongolia

[37] Univ Tarapaca, Inst Alta Invest, Casilla 7D, Arica 1000000, Chile

[38] Jilin Univ, Changchun 130012, Peoples R China

[39] Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany

[40] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia

[41] Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany

[42] Lanzhou Univ, Lanzhou 730000, Peoples R China

[43] Liaoning Normal Univ, Dalian 116029, Peoples R China

[44] Liaoning Univ, Shenyang 110036, Peoples R China

[45] Nanjing Normal Univ, Nanjing 210023, Peoples R China

[46] Nanjing Univ, Nanjing 210093, Peoples R China

[47] Nankai Univ, Tianjin 300071, Peoples R China

[48] Natl Ctr Nucl Res, PL-02093 Warsaw, Poland

[49] North China Elect Power Univ, Beijing 102206, Peoples R China

[50] Peking Univ, Beijing 100871, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 131卷 / 15期

基金：

瑞典研究理事会; 国家重点研发计划; 中国国家自然科学基金; 新加坡国家研究基金会;

关键词：

LOCALLY WEIGHTED REGRESSION;

D O I：

10.1103/PhysRevLett.131.151903

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The process e thorn e- -> D = thorn s D =- s is studied with a semi-inclusive method using data samples at center-of-mass energies from threshold to 4.95 GeV collected with the BESIII detector operating at the Beijing Electron Positron Collider. The Born cross sections of the process are measured for the first time with high precision in this energy region. Two resonance structures are observed in the energy-dependent cross sections around 4.2 and 4.4 GeV. By fitting the cross sections with a coherent sum of three Breit-Wigner amplitudes and one phase-space amplitude, the two significant structures are assigned masses of o4186.8  8.7  30 thorn and o4414.6  3.4  6.1 thorn MeV=c2, widths of o55  15  53 thorn and o122.5  7.5  8.1 thorn MeV, where the first errors are statistical and the second ones are systematic. The inclusion of a third Breit-Wigner amplitude is necessary to describe a structure around 4.79 GeV.

引用

页数：10

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