Evidence of the singly Cabibbo suppressed decay Λc+ → pΠ0

被引：7

作者：

Ablikim, M. ^{[1
]}

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

Adlarson, P. ^{[81
]}

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

Aliberti, R. ^{[38
]}

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

An, M. R. ^{[42
]}

An, Q. ^{[60
,61
,75
]}

Bai, Y. ^{[59
]}

Bakina, O. ^{[39
]}

Balossino, I. ^{[31
]}

Ban, Y. ^{[49
,97
]}

Batozskaya, V. ^{[1
,47
]}

Begzsuren, K. ^{[35
]}

Berger, N. ^{[38
]}

Berlowski, M. ^{[47
]}

Bertani, M. ^{[28
]}

Bettoni, D. ^{[31
]}

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

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

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

Boyko, I. ^{[39
]}

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

Brueggemann, A. ^{[72
]}

Cai, H. ^{[82
]}

Cai, X. ^{[1
,60
,61
]}

Calcaterra, A. ^{[28
]}

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

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

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

Chang, J. F. ^{[1
,60
,61
]}

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

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

Che, G. R. ^{[46
]}

Chelkov, G. ^{[39
,88
]}

Chen, C. ^{[46
]}

Chen, Chao ^{[57
]}

Chen, G. ^{[1
]}

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

Chen, M. L. ^{[1
,60
,61
,67
]}

Chen, S. J. ^{[45
]}

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

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

Chen, X. R. ^{[34
,67
]}

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

Chen, Y. B. ^{[1
,60
,61
]}

Chen, Y. Q. ^{[37
]}

Chen, Z. J. ^{[25
,98
]}

Cheng, W. S. ^{[79
]}

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

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

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

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

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

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

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

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

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

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

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

[27] Indiana Univ, Bloomington, IN 47405 USA

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[50] Qufu Normal Univ, Qufu 273165, Shandong, Peoples R China

来源：

PHYSICAL REVIEW D | 2024年 / 109卷 / 09期

基金：

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

关键词：

D O I：

10.1103/PhysRevD.109.L091101

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Evidence for the singly Cabibbo suppressed decay Lambda(+)(c) -> p Pi(0) is reported for the first time with a statistical significance of 3.7 sigma based on 6.0 fb(-1) of e(+)e(-) collision data collected at center-of-mass energies between 4.600 and 4.843 GeV with the BESIII detector at the BEPCII collider. The absolute branching fraction of Lambda(+)(c) -> p Pi(0) is measured to be (1.56(-0.58)(+0.72) +/- 0.20) Chi 10(-4). Combining with the branching fraction of Lambda(+)(c) -> n Pi(+), (6.6 +/- 1.3) Chi 10(-4), the ratio of the branching fractions of Lambda(+)(c) -> n Pi(+) and Lambda(+)(c) -> p Pi(0) is calculated to be 3.2(-1.2)(+2.2). As an important input for the theoretical models describing the decay mechanisms of charmed baryons, our result indicates that the nonfactorizable contributions play an essential role and their interference with the factorizable contributions should not be significant. In addition, the absolute branching fraction of Lambda(+)(c) -> p eta is measured to be (1.63 +/- 0.31(stat) +/- 0.11(syst)) Chi 10(-3).

引用

页数：10

共 50 条

[1] Evidence for the singly Cabibbo suppressed decay Λc+ → pη and search for Λc+ → pπ0
Ablikim, M.
Achasov, M. N.
Ahmed, S.
Ai, X. C.
Albayrak, O.
Albrecht, M.
Ambrose, D. J.
Amoroso, A.
An, F. F.
An, Q.
Bai, J. Z.
Bakina, O.
Ferroli, R. Baldini
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Bennett, D. W.
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Bian, J. M.
Bianchi, F.
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Briere, R. A.
Cai, H.
Cai, X.
Cakir, O.
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Cetin, S. A.
Chai, J.
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Chelkov, G.
Chen, G.
Chen, H. S.
Chen, J. C.
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[2] Observation of the Singly Cabibbo Suppressed Decay Λc+ → nπ+
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P. Albicocco
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Bachmann, S.
Back, J. J.
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Baldini, W.
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Barrand, G. C.
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Baryshnikov, F.
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Battista, V.
Bay, A.
Beddow, J.
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[10] Singly Cabibbo-suppressed hadronic decays of Λc+
Cheng, Hai-Yang
Kang, Xian-Wei
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PHYSICAL REVIEW D, 2018, 97 (07)

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