Photoproduction of π+π- meson pairs on the proton

被引:36
|
作者
Battaglieri, M. [1 ]
De Vita, R. [1 ]
Szczepaniak, A. P. [2 ,3 ]
Adhikari, K. P. [36 ]
Amaryan, M. J. [36 ]
Anghinolfi, M. [1 ]
Baghdasaryan, H. [46 ]
Bedlinskiy, I. [23 ]
Bellis, M. [8 ]
Bibrzycki, L. [30 ]
Biselli, A. S. [14 ,37 ]
Bookwalter, C. [16 ]
Branford, D. [13 ]
Briscoe, W. J. [17 ]
Burkert, V. D. [43 ]
Careccia, S. L. [36 ]
Carman, D. S. [43 ]
Clinton, E. [29 ]
Cole, P. L. [19 ]
Collins, P. [5 ]
Crede, V. [16 ]
Dale, D. [19 ]
D'Angelo, A. [21 ,39 ]
Daniel, A. [35 ]
Dashyan, N. [48 ]
De Sanctis, E. [20 ]
Deur, A. [43 ]
Dhamija, S. [15 ]
Djalali, C. [42 ]
Dodge, G. E. [36 ]
Doughty, D. [11 ,43 ]
Drozdov, V. [1 ]
Egiyan, H. [31 ,43 ]
Eugenio, P. [16 ]
Fedotov, G. [41 ]
Fegan, S. [18 ]
Fradi, A. [22 ]
Gabrielyan, M. Y. [15 ]
Gan, L. [33 ]
Garcon, M. [10 ]
Gasparian, A. [34 ]
Gilfoyle, G. P. [38 ]
Giovanetti, K. L. [25 ]
Girod, F. X. [10 ]
Glamazdin, O. [27 ]
Goett, J. [37 ]
Goetz, J. T. [6 ]
Gohn, W. [12 ]
Golovatch, E. [1 ,41 ]
Gothe, R. W. [42 ]
机构
[1] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy
[2] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA
[3] Indiana Univ, Ctr Nucl Theory, Bloomington, IN 47405 USA
[4] Argonne Natl Lab, Argonne, IL 60439 USA
[5] Arizona State Univ, Tempe, AZ 85287 USA
[6] Univ Calif Los Angeles, Los Angeles, CA 90095 USA
[7] Calif State Univ Dominguez Hills, Carson, CA 90747 USA
[8] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
[9] Catholic Univ Amer, Washington, DC 20064 USA
[10] CEA, Ctr Saclay, Irfu Serv Phys Nucl, F-91191 Gif Sur Yvette, France
[11] Christopher Newport Univ, Newport News, VA 23606 USA
[12] Univ Connecticut, Storrs, CT 06269 USA
[13] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland
[14] Fairfield Univ, Fairfield, CT 06824 USA
[15] Florida Int Univ, Miami, FL 33199 USA
[16] Florida State Univ, Tallahassee, FL 32306 USA
[17] George Washington Univ, Washington, DC 20052 USA
[18] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland
[19] Idaho State Univ, Pocatello, ID 83209 USA
[20] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
[21] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy
[22] ORSAY, Inst Phys Nucl, Orsay, France
[23] Inst Theoret & Expt Phys, Moscow 117259, Russia
[24] Inst High Energy Phys, Protvino 142281, Russia
[25] James Madison Univ, Harrisonburg, VA 22807 USA
[26] Univ Kentucky, Lexington, KY 40506 USA
[27] Kharkov Phys & Technol Inst, UA-61108 Kharkov, Ukraine
[28] Kyungpook Natl Univ, Taegu 702701, South Korea
[29] Univ Massachusetts, Amherst, MA 01003 USA
[30] PAN, Henryk Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland
[31] Univ New Hampshire, Durham, NH 03824 USA
[32] Norfolk State Univ, Norfolk, VA 23504 USA
[33] Univ N Carolina, Wilmington, NC 28403 USA
[34] N Carolina Agr & Tech State Univ, Greensboro, NC 27455 USA
[35] Ohio Univ, Athens, OH 45701 USA
[36] Old Dominion Univ, Norfolk, VA 23529 USA
[37] Rensselaer Polytech Inst, Troy, NY 12180 USA
[38] Univ Richmond, Richmond, VA 23173 USA
[39] Univ Roma Tor Vergata, I-00133 Rome, Italy
[40] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan
[41] Skobeltsyn Nucl Phys Inst, Moscow 119899, Russia
[42] Univ S Carolina, Columbia, SC 29208 USA
[43] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA
[44] Union Coll, Schenectady, NY 12308 USA
[45] Univ Tecn Federico Santa Maria, Valparaiso, Chile
[46] Univ Virginia, Charlottesville, VA 22901 USA
[47] Coll William & Mary, Williamsburg, VA 23187 USA
[48] Yerevan Phys Inst, Yerevan 375036, Armenia
来源
PHYSICAL REVIEW D | 2009年 / 80卷 / 07期
关键词
PI-PI; COUPLED-CHANNEL; DIFFRACTION DISSOCIATION; POLARIZED PHOTONS; HIGH-STATISTICS; MODEL; CHAMBER; SYSTEM; K(K)OVER-BAR; UNITARITY;
D O I
10.1103/PhysRevD.80.072005
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The exclusive reaction gamma p -> pp(+)pi(-) was studied in the photon energy range 3.0-3.8 GeV and the momentum transfer range 0.4 < -t < 1.0 GeV2. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. In this kinematic range, the integrated luminosity was about 20 pb(-1). The reaction was isolated by detecting the pi(+) and proton in CLAS, and reconstructing the pi(-) via the missing-mass technique. Moments of the di-pion decay angular distributions were derived from the experimental data. Differential cross sections for the S, P, and D-waves, in the M pi+pi- mass range 0.4-1.4 GeV, were derived performing a partial wave expansion of the extracted moments. Beside the dominant contribution of the rho(770) meson in the P-wave, evidence for the f(0)(980) and the f(2)(1270) mesons was found in the S and D-waves, respectively. The differential production cross sections d sigma/dt for individual waves in the mass range of the above-mentioned mesons were extracted. This is the first time the f(0)(980) has been measured in a photoproduction experiment.
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