Search for Θ++ Pentaquarks in the Exclusive Reaction γp→K+K-p

被引：11

作者：

Kubarovsky, V. ^{[1
]}

Battaglieri, M.

De Vita, R.

Goett, J.

Guo, L.

Mutchler, G. S.

Stoler, P.

Weygand, D. P.

Ambrozewicz, P.

Anghinolfi, M.

Asryan, G.

Avakian, H.

Bagdasaryan, H.

Baillie, N.

Ball, J. P.

Baltzell, N. A.

Batourine, V.

Bedlinskiy, I.

Bellis, M.

Benmouna, N.

Berman, B. L.

Biselli, A. S.

Bouchigny, S.

Boiarinov, S.

Bradford, R.

Branford, D.

Briscoe, W. J.

Brooks, W. K.

Bueltmann, S.

Burkert, V. D.

Butuceanu, C.

Calarco, J. R.

Careccia, S. L.

Carman, D. S.

Chen, S.

Clinton, E.

Cole, P. L.

Collins, P.

Coltharp, P.

Crabb, D.

Crannell, H.

Crede, V.

Cummings, J. P.

De Masi, R.

Dale, D.

De Sanctis, E.

Degtyarenko, P. V.

Deur, A.

Dharmawardane, K. V.

Djalali, C.

机构：

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

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

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

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

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

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

[7] Rice Univ, Houston, TX 77005 USA

[8] Univ Connecticut, Storrs, CT 06269 USA

[9] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

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

[11] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[12] Calif State Univ Dominguez Hills, Carson, CA 90747 USA

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

[14] CEA Saclay, Serv Phys Nucl, F-91191 Gif Sur Yvette, France

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

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

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

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

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

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

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

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

[23] Inst Phys Nucl, F-91406 Orsay, France

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

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

[26] James Madison Univ, Harrisonburg, VA 22807 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] Moscow MV Lomonosov State Univ, Gen Nucl Phys Inst, Moscow 119899, Russia

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

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

[33] Ohio Univ, Athens, OH 45701 USA

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

[35] Univ Richmond, Richmond, VA 23173 USA

[36] Union Coll, Schenectady, NY 12308 USA

[37] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA

[38] Univ Virginia, Charlottesville, VA 22901 USA

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

[40] Yerevan Phys Inst, Yerevan 375036, Armenia

[41] Univ Kentucky, Lexington, KY 40506 USA

[42] Univ N Carolina, Wilmington, NC 28403 USA

[43] N Carolina Agr & Tech State Univ, Greensboro, NC 27455 USA

[44] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.97.102001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The reaction gamma p -> pK(+)K(-) was studied at Jefferson Lab with photon energies from 1.8 to 3.8 GeV using a tagged photon beam. The goal was to search for a Theta(++) pentaquark, a narrow, doubly charged baryon state having strangeness S=+1 and isospin I=1, in the pK(+) invariant mass spectrum. No statistically significant evidence of a Theta(++) was found. Upper limits on the total and differential cross section for the reaction gamma p -> K-Theta(++) were obtained in the mass range from 1.5 to 2.0 GeV/c(2), with an upper limit for a narrow resonance with a mass M-Theta(++)=1.54 GeV/c(2) of about 0.15 nb, 95% C.L.. This result places a stringent upper limit on the Theta(++) width Gamma(++)(Theta)< 0.1 MeV/c(2).

引用

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