Measurement of e+e-→ K+K-π0 cross section and observation of a resonant structure

被引：7

作者：

Ablikim, M. ^{[1
]}

Achasov, M. N. ^{[10
,81
]}

Adlarson, P. ^{[74
]}

Ahmed, S. ^{[14
]}

Albrecht, M. ^{[4
]}

Aliberti, R. ^{[31
]}

Amoroso, A. ^{[71
,72
]}

An, M. R. ^{[35
]}

An, Q. ^{[53
,68
]}

Bai, X. H. ^{[62
]}

Bai, Y. ^{[52
]}

Bakina, O. ^{[32
]}

Baldini Ferroli, R. ^{[23
]}

Balossino, I. ^{[26
]}

Ban, Y. ^{[42
,90
]}

Batozskaya, V. ^{[1
,40
]}

Becker, D. ^{[31
]}

Begzsuren, K. ^{[29
]}

Berger, N. ^{[31
]}

Bertani, M. ^{[23
]}

Bettoni, D. ^{[26
]}

Bianchi, F. ^{[71
,72
]}

Bloms, J. ^{[65
]}

Bortone, A. ^{[71
,72
]}

Boyko, I. ^{[32
]}

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

Cai, H. ^{[75
]}

Cai, X. ^{[1
,53
]}

Calcaterra, A. ^{[23
]}

Cao, G. F. ^{[1
,59
]}

Cao, N. ^{[1
,59
]}

Cetin, S. A. ^{[57
]}

Chang, J. F. ^{[1
,53
]}

Chang, W. L. ^{[1
,59
]}

Chelkov, G. ^{[32
,80
]}

Chen, C. ^{[39
]}

Chen, G. ^{[1
]}

Chen, H. S. ^{[1
,59
]}

Chen, M. L. ^{[1
,53
]}

Chen, S. J. ^{[38
]}

Chen, T. ^{[1
]}

Chen, X. R. ^{[28
]}

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

Chen, Y. B. ^{[1
,53
]}

Chen, Z. J. ^{[20
,91
]}

Cheng, W. S. ^{[72
]}

Cibinetto, G. ^{[26
]}

Cossio, F. ^{[72
]}

Cui, J. J. ^{[45
]}

Cui, X. F. ^{[39
]}

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, Peoples R China

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

[8] COMSATS Univ Islamabad, Lahore Campus,Def Rd,Off Raiwind Rd, Lahore 54000, Pakistan

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

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

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

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

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

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

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

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

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

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

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

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

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

[22] Indiana Univ, Bloomington, IN 47405 USA

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

[24] INFN, Sez Perugia, 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 Modern Phys, Lanzhou 730000, Peoples R China

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

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

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

[32] Joint Inst Nucl Res, Dubna 141980, Moscow, Russia

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

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

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

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

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

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

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

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

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

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

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

[44] Shandong Normal Univ, Jinan 250014, Peoples R China

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

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

[47] Shanxi Normal Univ, Linfen 041004, Shanxi, Peoples R China

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

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

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

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2022年 / 2022卷 / 07期

基金：

国家重点研发计划; 瑞典研究理事会; 中国国家自然科学基金;

关键词：

e(+)-e(-) Experiments; Particle and Resonance Production; Spectroscopy; Y(2175); DECAY; STATE;

D O I：

10.1007/JHEP07(2022)045

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Based on e(+)e(-) collision data collected by the BESIII detector at the BEPCII collider at center-of-mass energies from 2.000 to 3.080 GeV, a partial-wave analysis is performed for the process e(+)e(-)-> K+K-pi(0). The Born cross section of the process e(+)e(-)-> K+K-pi(0) and its subprocesses e(+)e(-)-> phi pi(0), K*+(892)K- and K2*+(1430)K- are measured. The results for e(+)e(-)-> K+K-pi(0) and phi pi(0) are consistent with the BaBar measurements and with improved precision. By analyzing the cross sections of the subprocesses e(+)e(-)-> K*+(892)K- and K2*+(1430)K-, a structure with mass M-R = (2190 +/- 19 +/- 37) MeV/c(2) and width Gamma(R) = (191 +/- 28 +/- 60) MeV is observed with a combined statistical significance of 7.1 sigma. The measured resonance parameters suggest it can be identified as the phi(2170), thus the results provide valuable input to understand the internal nature of this state.

引用

页数：25

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