Study of e+e- → π+π- J/ψ and Observation of a Charged Charmoniumlike State at Belle

被引：680

作者：

Liu, Z. Q. ^{[18
]}

Shen, C. P. ^{[37
]}

Yuan, C. Z. ^{[18
]}

Adachi, I. ^{[14
]}

Aihara, H. ^{[60
]}

Asner, D. M. ^{[47
]}

Aulchenko, V. ^{[3
,4
]}

Aushev, T. ^{[22
]}

Aziz, T. ^{[55
]}

Bakich, A. M. ^{[54
]}

Bala, A. ^{[48
]}

Belous, K. ^{[20
]}

Bhardwaj, V. ^{[39
]}

Bhuyan, B. ^{[16
]}

Bischofberger, M. ^{[39
]}

Bondar, A. ^{[3
,4
]}

Bonvicini, G. ^{[66
]}

Bozek, A. ^{[43
]}

Bracko, M. ^{[23
,32
]}

Brodzicka, J. ^{[43
]}

Browder, T. E. ^{[13
]}

Chang, P. ^{[42
]}

Chekelian, V. ^{[33
]}

Chen, A. ^{[40
]}

Chen, P. ^{[42
]}

Cheon, B. G. ^{[12
]}

Chistov, R. ^{[22
]}

Cho, K. ^{[27
]}

Chobanova, V. ^{[33
]}

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

Choi, Y. ^{[53
]}

Cinabro, D. ^{[66
]}

Dalseno, J. ^{[33
,56
]}

Danilov, M. ^{[22
,35
]}

Dolezal, Z. ^{[5
]}

Drasal, Z. ^{[5
]}

Drutskoy, A. ^{[22
,35
]}

Dutta, D. ^{[16
]}

Dutta, K. ^{[16
]}

Eidelman, S. ^{[3
,4
]}

Epifanov, D. ^{[60
]}

Farhat, H. ^{[66
]}

Fast, J. E. ^{[47
]}

Feindt, M. ^{[25
]}

Ferber, T. ^{[7
]}

Frey, A. ^{[10
]}

Gaur, V. ^{[55
]}

Gabyshev, N. ^{[3
,4
]}

Ganguly, S. ^{[66
]}

Gillard, R. ^{[66
]}

机构：

[1] Univ Basque Country UPV EHU, Bilbao 48080, Spain

[2] Univ Bonn, D-53115 Bonn, Germany

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

[4] Novosibirsk State Univ, Novosibirsk 630090, Russia

[5] Charles Univ Prague, Fac Math & Phys, Prague 12116, Czech Republic

[6] Univ Cincinnati, Cincinnati, OH 45221 USA

[7] DESY, D-22607 Hamburg, Germany

[8] Univ Giessen, D-35392 Giessen, Germany

[9] Gifu Univ, Gifu 5011193, Japan

[10] Univ Gottingen, Inst Phys 2, D-37073 Gottingen, Germany

[11] Gyeongsang Natl Univ, Chinju 660701, South Korea

[12] Hanyang Univ, Seoul 133791, South Korea

[13] Univ Hawaii, Honolulu, HI 96822 USA

[14] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan

[15] Ikerbasque, Bilbao 48011, Spain

[16] Indian Inst Technol Guwahati, Gauhati 781039, Assam, India

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

[18] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[19] Inst High Energy Phys, A-1050 Vienna, Austria

[20] Inst High Energy Phys, Protvino 142281, Russia

[21] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

[22] Inst Theoret & Expt Phys, Moscow 117218, Russia

[23] Jozef Stefan Inst, Ljubljana 1000, Slovenia

[24] Kanagawa Univ, Yokohama, Kanagawa 2218686, Japan

[25] Karlsruhe Inst Technol, Inst Expt Kernphys, D-76131 Karlsruhe, Germany

[26] Kennesaw State Univ, Kennesaw, GA 30144 USA

[27] Korea Inst Sci & Technol Informat, Taejon 305806, South Korea

[28] Korea Univ, Seoul 136713, South Korea

[29] Kyungpook Natl Univ, Taegu 702701, South Korea

[30] Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland

[31] Univ Ljubljana, Fac Math & Phys, Ljubljana 1000, Slovenia

[32] Univ Maribor, SLO-2000 Maribor, Slovenia

[33] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[34] Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia

[35] Moscow Phys Engn Inst, Moscow 115409, Russia

[36] Moscow Inst Phys & Technol, Moscow 141700, Russia

[37] Nagoya Univ, Grad Sch Sci, Nagoya, Aichi 4648602, Japan

[38] Nagoya Univ, Kobayashi Maskawa Inst, Nagoya, Aichi 4648602, Japan

[39] Nara Womens Univ, Nara 6308506, Japan

[40] Natl Cent Univ, Chungli 32054, Taiwan

[41] Natl United Univ, Miaoli 36003, Taiwan

[42] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan

[43] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland

[44] Nippon Dent Univ, Niigata 9518580, Japan

[45] Niigata Univ, Niigata 9502181, Japan

[46] Osaka City Univ, Osaka 5588585, Japan

[47] Pacific NW Natl Lab, Richland, WA 99352 USA

[48] Panjab Univ, Chandigarh 160014, India

[49] Univ Pittsburgh, Pittsburgh, PA 15260 USA

[50] RIKEN BNL Res Ctr, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 25期

关键词：

CROSS-SECTION;

D O I：

10.1103/PhysRevLett.110.252002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The cross section for e(+)e(-) -> pi(+)pi(-) J/psi between 3.8 and 5.5 GeV is measured with a 967 fb(-1) data sample collected by the Belle detector at or near the Upsilon(nS) (n = 1, 2, . . . , 5) resonances. The Y(4260) state is observed, and its resonance parameters are determined. In addition, an excess of pi(+)pi(-) J/psi production around 4 GeV is observed. This feature can be described by a Breit-Wigner parametrization with properties that are consistent with the Y(4008) state that was previously reported by Belle. In a study of Y(4260) -> pi(+)pi(-) J/psi decays, a structure is observed in the M(pi(+/-) J/psi) mass spectrum with 5.2 sigma significance, with mass M = (3894.5 +/- 6.6 +/- 4.5) MeV/c(2) and width Gamma = (63 +/- 24 +/- 26) MeV/c(2), where the errors are statistical and systematic, respectively. This structure can be interpreted as a new charged charmoniumlike state.

引用

页数：7

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