Observation of the Semileptonic Decay D0 → a0(980)-e+νe and Evidence for D+ → a0(980)0e+νe

被引：29

作者：

Ablikim, M. ^{[1
]}

Achasov, M. N. ^{[10
,71
]}

Ahmed, S. ^{[15
]}

Albrecht, M. ^{[4
]}

Alekseev, M. ^{[60
,62
]}

Amoroso, A. ^{[60
,62
]}

An, F. F. ^{[1
]}

An, Q. ^{[45
,46
,57
]}

Bai, Y. ^{[44
]}

Bakina, O. ^{[30
]}

Ferroli, R. Baldini ^{[23
]}

Ban, Y. ^{[38
]}

Begzsuren, K. ^{[28
]}

Bennett, D. W. ^{[22
]}

Bennett, J. V. ^{[5
]}

Berger, N. ^{[29
]}

Bertani, M. ^{[23
]}

Bettoni, D. ^{[26
]}

Bianchi, F. ^{[60
,62
]}

Boger, E. ^{[30
,69
]}

Boyko, I. ^{[30
]}

Briere, R. A. ^{[5
]}

Cai, H. ^{[64
]}

Cai, X. ^{[1
,45
,46
]}

Calcaterra, A. ^{[23
]}

Cao, G. F. ^{[1
,51
]}

Cetin, S. A. ^{[49
]}

Chai, J. ^{[62
]}

Chang, J. F. ^{[1
,45
,46
]}

Chang, W. L. ^{[1
,51
]}

Chelkov, G. ^{[30
,69
,70
]}

Chen, G. ^{[1
]}

Chen, H. S. ^{[1
,51
]}

Chen, J. C. ^{[1
]}

Chen, M. L. ^{[1
,45
,46
]}

Chen, S. J. ^{[36
]}

Chen, X. R. ^{[33
]}

Chen, Y. B. ^{[1
,45
,46
]}

Cheng, W. ^{[62
]}

Chu, X. K. ^{[38
]}

Cibinetto, G. ^{[26
]}

Cossio, F. ^{[62
]}

Dai, H. L. ^{[1
,45
,46
]}

Dai, J. P. ^{[40
,75
,76
,77
]}

Dbeyssi, A. ^{[15
]}

Dedovich, D. ^{[30
]}

Deng, Z. Y. ^{[1
]}

Denig, A. ^{[29
]}

Denysenko, I. ^{[30
]}

Destefanis, M. ^{[60
,62
]}

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] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[6] Cent China Normal Univ, Wuhan 430079, Hubei, Peoples R China

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

[8] COMSATS Inst Informat Technol, Def Rd,Raiwind Rd, Lahore 54000, Pakistan

[9] Fudan Univ, Shanghai 200443, Peoples R China

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

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

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

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

[14] Hangzhou Normal Univ, Hangzhou 310036, Zhejiang, Peoples R China

[15] Helmholtz Inst Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany

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

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

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

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

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

[21] Indian Inst Technol Madras, Madras 600036, Tamil Nadu, India

[22] Indiana Univ, Bloomington, IN 47405 USA

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

[24] INFN, I-06100 Perugia, Italy

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

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

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

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

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

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

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

[32] Univ Groningen, KVI CART, NL-9747 AA Groningen, Netherlands

[33] Lanzhou Univ, Lanzhou 730000, Gansu, Peoples R China

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

[35] Nanjing Normal Univ, Nanjing 210023, Jiangsu, Peoples R China

[36] Nanjing Univ, Nanjing 210093, Jiangsu, Peoples R China

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

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

[39] Shandong Univ, Jinan 250100, Shandong, Peoples R China

[40] Shanghai Jiao Tong Univ, Shanghai 200240, Peoples R China

[41] Shanxi Univ, Taiyuan 030006, Shanxi, Peoples R China

[42] Sichuan Univ, Chengdu 610064, Sichuan, Peoples R China

[43] Soochow Univ, Suzhou 215006, Peoples R China

[44] Southeast Univ, Nanjing 211100, Jiangsu, Peoples R China

[45] State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China

[46] State Key Lab Particle Detect & Elect, Hefei 230026, Anhui, Peoples R China

[47] Sun Yat Sen Univ, Guangzhou 510275, Guangdong, Peoples R China

[48] Tsinghua Univ, Beijing 100084, Peoples R China

[49] Istanbul Bilgi Univ, TR-34060 Istanbul, Turkey

[50] Near East Univ, Nicosia 10, North Cyprus, Turkey

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 121卷 / 08期

基金：

瑞典研究理事会; 中国国家自然科学基金;

关键词：

E(+)E(-);

D O I：

10.1103/PhysRevLett.121.081802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 D-0 -> a(0)(980)(-)e(+)nu(e) and evidence for D+ -> a(0)(980)(0)e(+)nu(e) with significances of 6.4 sigma and 2.9 sigma, respectively. The absolute branching fractions are determined to be B(D-0 -> a(0)(980)(-)e(+)nu(e)) x B(a(0)(980)(-) -> eta pi(-)) = [1.33(-0.29)(+0.33)(stat) +/- 0.09(syst)] x 10(-4) and B(D+ -> a(0)(980)(0)e(+)nu(e)) x B(a(0)(980)(0) -> eta pi(0)) = [1.66(-0.66)(+0.81)(stat) +/- 0.11(syst) x 10(-4). This is the first time the a(0)(980) meson has been measured in a D-0 semileptonic decay, which would open one more interesting page in the investigation of the nature of the puzzling a(0)(980) states.

引用

页数：8

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