First Observation of a Three-Resonance Structure in e+e- → Nonopen Charm Hadrons

被引：0

作者：

Ablikim, M. ^{[1
]}

Achasov, M. N. ^{[5
,89
]}

Adlarson, P. ^{[81
]}

Ai, X. C. ^{[87
]}

Aliberti, R. ^{[39
]}

Amoroso, A. ^{[78
,79
,80
]}

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

An, Q. ^{[61
,75
]}

Bai, Y. ^{[60
]}

Bakina, O. ^{[40
]}

Balossino, I. ^{[32
]}

Ban, Y. ^{[50
,97
]}

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

Begzsuren, K. ^{[36
]}

Berger, N. ^{[39
]}

Berlowski, M. ^{[48
]}

Bertani, M. ^{[29
]}

Bettoni, D. ^{[32
]}

Bianchi, F. ^{[78
,79
,80
]}

Bianco, E. ^{[78
,79
,80
]}

Bortone, A. ^{[78
,79
,80
]}

Boyko, I. ^{[40
]}

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

Brueggemann, A. ^{[72
]}

Cai, H. ^{[82
]}

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

Calcaterra, A. ^{[29
]}

Cao, G. F. ^{[1
,67
]}

Cao, N. ^{[1
,67
]}

Cetin, S. A. ^{[65
]}

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

Chang, T. T. ^{[83
]}

Chang, W. L. ^{[1
,67
]}

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

Chelkov, G. ^{[40
,88
]}

Chen, C. ^{[47
]}

Chen, Chao ^{[58
]}

Chen, G. ^{[1
]}

Chen, H. S. ^{[1
,67
]}

Chen, M. L. ^{[1
,61
,67
]}

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

Chen, S. L. ^{[49
]}

Chen, S. M. ^{[64
]}

Chen, T. ^{[1
,67
]}

Chen, X. R. ^{[35
,67
]}

Chen, X. T. ^{[1
,67
]}

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

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

Chen, Z. J. ^{[26
,98
]}

Cheng, W. S. ^{[80
]}

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,Off Raiwind Rd, Lahore 54000, 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] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[30] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy

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

[32] Ist Nazl Fis Nucl, 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 | 2024年 / 132卷 / 19期

基金：

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

关键词：

BRANCHING FRACTION; CROSS-SECTIONS; PSI(3770); STATES; DECAY;

D O I：

10.1103/PhysRevLett.132.191902

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the measurement of the inclusive cross sections for e(+)e(-) -> nOCH (where nOCH denotes non-open charm hadrons) with improved precision at center-of-mass (c.m.) energies from 3.645 to 3.871 GeV. We observe three resonances: R(3760), R(3780), and R(3810) with significances of 8.1 sigma, 13.7 sigma, and 8.8 sigma, respectively. The R(3810) state is observed for the first time, while the R(3760) and R(3780) states are observed for the first time in the nOCH cross sections. Two sets of resonance parameters describe the energy-dependent line shape of the cross sections well. In set I [set II], the R(3810) state has mass (3805.7 +/- 1.1 +/- 2.7) [(3805.7 +/- 1.1 +/- 2.7)] MeV/c(2), total width (11.6 +/- 2.9 +/- 1.9) =[(11.5 +/- 2.8 +/- 1.9)] MeV, and an electronic width multiplied by the nOCH decay branching fraction of (10.9 +/- 3.8 +/- 2.5) [(11.0 +/- 3.4 +/- 2.5)] eV. In addition, we measure the branching fractions B=R(3760) -> nOCH] = (25.2 +/- 16.1 +/- 30.4)% [(6.4 +/- 4.8 +/- 7.7)%] and B[R(3780) -> nOCH] = (12.3 +/- 6.6 +/- 8.3)% [10.4 +/- 4.8 +/- 7.0)%] for the first time. The R(3760) state can be interpreted as an open-charm (OC) molecular state, but containing a simple four-quark state component. The R(3810) state can be interpreted as a hadrocharmonium state.

引用

页数：10

共 30 条

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