Branching ratio of the electromagnetic decay of the Σ+(1385)

被引：15

作者：

Keller, D. ^{[1
]}

Hicks, K. ^{[1
]}

Adhikari, K. P. ^{[28
]}

Adikaram, D. ^{[28
]}

Amaryan, M. J. ^{[28
]}

Anghinolfi, M. ^{[19
]}

Baghdasaryan, H. ^{[28
,38
]}

Ball, J. ^{[7
]}

Battaglieri, M. ^{[19
]}

Bedlinskiy, I. ^{[22
]}

Biselli, A. S. ^{[5
,11
]}

Bookwalter, C. ^{[13
]}

Boiarinov, S. ^{[34
]}

Branford, D. ^{[10
]}

Briscoe, W. J. ^{[15
]}

Brooks, W. K. ^{[34
,36
]}

Burkert, V. D. ^{[34
]}

Carman, D. S. ^{[34
]}

Celentano, A. ^{[19
]}

Chandavar, S. ^{[1
]}

Cole, P. L. ^{[16
,34
]}

Contalbrigo, M. ^{[17
]}

Crede, V. ^{[13
]}

D'Angelo, A. ^{[20
,31
]}

Daniel, A. ^{[1
]}

Dashyan, N. ^{[40
]}

De Vita, R. ^{[19
]}

De Sanctis, E. ^{[18
]}

Djalali, C. ^{[33
]}

Doughty, D. ^{[8
,34
]}

Dupre, R. ^{[2
]}

El Alaoui, A. ^{[2
]}

El Fassi, L. ^{[2
]}

Elouadrhiri, L. ^{[34
]}

Eugenio, P. ^{[13
]}

Fedotov, G. ^{[33
]}

Gabrielyan, M. Y. ^{[12
]}

Gevorgyan, N. ^{[40
]}

Gilfoyle, G. P. ^{[30
]}

Giovanetti, K. L. ^{[23
]}

Gohn, W. ^{[9
]}

Golovatch, E. ^{[32
]}

Gothe, R. W. ^{[33
]}

Graham, L. ^{[33
]}

Griffioen, K. A. ^{[39
]}

Guidal, M. ^{[21
]}

Guler, N. ^{[28
]}

Guo, L. ^{[12
,34
]}

Hafidi, K. ^{[2
]}

Hakobyan, H. ^{[36
,40
]}

机构：

[1] Ohio Univ, Athens, OH 45701 USA

[2] Argonne Natl Lab, Argonne, IL 60439 USA

[3] Arizona State Univ, Tempe, AZ 85287 USA

[4] Canisius Coll, Buffalo, NY 14208 USA

[5] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[6] Catholic Univ Amer, Washington, DC 20064 USA

[7] CEA, Ctr Saclay, Irfu Serv Phys Nucl, F-91191 Gif Sur Yvette, France

[8] Christopher Newport Univ, Newport News, VA 23606 USA

[9] Univ Connecticut, Storrs, CT 06269 USA

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

[11] Fairfield Univ, Fairfield, CT 06824 USA

[12] Florida Int Univ, Miami, FL 33199 USA

[13] Florida State Univ, Tallahassee, FL 32306 USA

[14] Univ Genoa, I-16146 Genoa, Italy

[15] George Washington Univ, Washington, DC 20052 USA

[16] Idaho State Univ, Pocatello, ID 83209 USA

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

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

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

[20] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy

[21] Inst Phys Nucl ORSAY, Orsay, France

[22] Inst Theoret & Expt Phys, Moscow 117259, Russia

[23] James Madison Univ, Harrisonburg, VA 22807 USA

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

[25] Univ Grenoble 1, LPSC, CNRS IN2P3, INPG, Grenoble, France

[26] Univ New Hampshire, Durham, NH 03824 USA

[27] Norfolk State Univ, Norfolk, VA 23504 USA

[28] Old Dominion Univ, Norfolk, VA 23529 USA

[29] Rensselaer Polytech Inst, Troy, NY 12180 USA

[30] Univ Richmond, Richmond, VA 23173 USA

[31] Univ Roma Tor Vergata, I-00133 Rome, Italy

[32] Skobeltsyn Nucl Phys Inst, Moscow 119899, Russia

[33] Univ S Carolina, Columbia, SC 29208 USA

[34] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

[35] Union Coll, Schenectady, NY 12308 USA

[36] Univ Tecn Federico Santa Maria, Valparaiso, Chile

[37] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland

[38] Univ Virginia, Charlottesville, VA 22901 USA

[39] Coll William & Mary, Williamsburg, VA 23187 USA

[40] Yerevan Phys Inst, Yerevan 375036, Armenia

来源：

PHYSICAL REVIEW D | 2012年 / 85卷 / 05期

基金：

英国科学技术设施理事会; 美国能源部; 美国国家科学基金会; 新加坡国家研究基金会;

关键词：

RADIATIVE DECAYS; QUARK-MODEL; BARYONS; HYPERONS;

D O I：

10.1103/PhysRevD.85.052004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The CLAS detector was used to obtain the first ever measurement of the electromagnetic decay of the Sigma*(+)(1385) from the reaction gamma p -> K-0 Sigma*(+)(1385). A real photon beam with a maximum energy of 3.8 GeV was incident on a liquid-hydrogen target, resulting in the photoproduction of the kaon and Sigma* hyperon. Kinematic fitting was used to separate the reaction channel from the background processes. The fitting algorithm exploited a new method to kinematically fit neutrons in the CLAS detector, leading to the measured decay widths ratio Sigma(+)(1385)->Sigma(+)gamma/Sigma(+)(1385)->Sigma(+)pi(0)=11.95 +/-.2.21(stat)(-1.21)(+0.53)(sys)%and a deduced partial width of 250.0 +/- 56.9(stat)(-41.2)(+34.3)(sys) keV. AU-spin symmetry test using the SU(3) flavor-multiplet representation yields predictions for the Sigma*(+)(1385)->Sigma(+)gamma and Sigma*(0)(1385)->Lambda gamma partial widths that agree with the experimental measurements.

引用

页数：20

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