Study of the reaction e+e- → J/ψπ+π- via initial-state radiation at BABAR

被引：91

作者：

Lees, J. P. ^{[1
]}

Poireau, V. ^{[1
]}

Tisserand, V. ^{[1
]}

Garra Tico, J. ^{[2
]}

Grauges, E. ^{[2
]}

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

Eigen, G. ^{[5
]}

Stugu, B. ^{[5
]}

Brown, D. N. ^{[6
,43
]}

Kerth, L. T. ^{[6
]}

Kolomensky, Yu. G. ^{[6
]}

Lynch, G. ^{[6
]}

Koch, H. ^{[6
]}

Schroeder, T. ^{[7
]}

Asgeirsson, D. J. ^{[8
]}

Hearty, C. ^{[8
]}

Mattison, T. S. ^{[8
]}

McKenna, J. A. ^{[8
]}

Khan, A. ^{[9
]}

Blinov, V. E. ^{[10
]}

Buzykaev, A. R. ^{[10
]}

Druzhinin, V. P. ^{[10
]}

Golubev, V. B. ^{[10
]}

Kravchenko, E. A. ^{[10
]}

Onuchin, A. P. ^{[10
]}

Serednyakov, S. I. ^{[10
]}

Skovpen, Yu. I. ^{[10
]}

Solodov, E. P. ^{[10
]}

Todyshev, K. Yu. ^{[10
]}

Yushkov, A. N. ^{[10
]}

Bondioli, M. ^{[11
]}

Kirkby, D. ^{[11
]}

Lankford, A. J. ^{[11
]}

Mandelkern, M. ^{[11
]}

Atmacan, H. ^{[12
]}

Gary, J. W. ^{[12
]}

Liu, F. ^{[12
]}

Long, O. ^{[12
]}

Vitug, G. M. ^{[12
]}

Campagnari, C. ^{[13
]}

Hong, T. M. ^{[13
]}

Kovalskyi, D. ^{[13
]}

Richman, J. D. ^{[13
]}

West, C. A. ^{[13
]}

Eisner, A. M. ^{[14
]}

Kroseberg, J. ^{[14
]}

Lockman, W. S. ^{[14
]}

Martinez, A. J. ^{[14
]}

Schumm, B. A. ^{[14
]}

Seiden, A. ^{[14
]}

机构：

[1] Univ Savoie, CNRS IN2P3, LAPP, F-74941 Annecy Le Vieux, France

[2] Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain

[3] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy

[4] Univ Bari, Dipartmento Fis, I-70126 Bari, Italy

[5] Univ Bergen, Inst Phys, N-5007 Bergen, Norway

[6] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[7] Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany

[8] Univ British Columbia, Vancouver, BC V6T 1Z1, Canada

[9] Brunel Univ, Uxbridge UB8 3PH, Middx, England

[10] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[11] Univ Calif Irvine, Irvine, CA 92697 USA

[12] Univ Calif Riverside, Riverside, CA 92521 USA

[13] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA

[14] Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA

[15] CALTECH, Pasadena, CA 91125 USA

[16] Univ Cincinnati, Cincinnati, OH 45221 USA

[17] Univ Colorado, Boulder, CO 80309 USA

[18] Colorado State Univ, Ft Collins, CO 80523 USA

[19] Tech Univ Dortmund, Fak Phys, D-44221 Dortmund, Germany

[20] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany

[21] Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France

[22] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland

[23] Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy

[24] Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy

[25] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[26] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

[27] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy

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

[29] Harvard Univ, Cambridge, MA 02138 USA

[30] Harvey Mudd Coll, Claremont, CA 91711 USA

[31] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany

[32] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[33] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England

[34] Univ Iowa, Iowa City, IA 52242 USA

[35] Iowa State Univ, Ames, IA 50011 USA

[36] Johns Hopkins Univ, Baltimore, MD 21218 USA

[37] CNRS, IN2P3, Lab Accelerateur Lineaire, F-91898 Orsay, France

[38] Univ Paris 11, Ctr Sci Orsay, F-91898 Orsay, France

[39] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[40] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England

[41] Univ London, London E1 4NS, England

[42] Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England

[43] Univ Louisville, Louisville, KY 40292 USA

[44] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

[45] Univ Manchester, Manchester M13 9PL, Lancs, England

[46] Univ Maryland, College Pk, MD 20742 USA

[47] Univ Massachusetts, Amherst, MA 01003 USA

[48] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA

[49] McGill Univ, Montreal, PQ H3A 2T8, Canada

[50] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

来源：

PHYSICAL REVIEW D | 2012年 / 86卷 / 05期

基金：

加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

DECAY;

D O I：

10.1103/PhysRevD.86.051102

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the process e(+)e(-) -> J/psi pi(+)pi(-) with initial-state-radiation events produced at the PEP-II asymmetric-energy collider. The data were recorded with the BABAR detector at center-of-mass energies 10.58 and 10.54 GeV, and correspond to an integrated luminosity of 454 fb(-1). We investigate the J/psi pi(+)pi(-) mass distribution in the region from 3.5 to 5.5 GeV/c(2). Below 3.7 GeV/c(2) the psi (2S) signal dominates, and above 4 GeV/c(2) there is a significant peak due to the Y(4260). A fit to the data in the range 3.74-5.50 GeV/c(2) yields a mass value 4245 +/- 5(stat) +/- 4(syst) MeV/c(2) and a width value 114(-15)(+16)(stat) +/- 7(syst) MeV for this state. We do not confirm the report from the Belle Collaboration of a broad structure at 4.01 GeV/c(2). In addition, we investigate the pi(+)pi(-) system which results from Y(4260) decay.

引用

页数：9

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