Observation of an exotic S =+1 baryon in exclusive photoproduction from the deuteron -: art. no. 252001

被引：477

作者：

Stepanyan, S ^{[1
]}

Hicks, K

Carman, DS

Pasyuk, E

Schumacher, RA

Smith, ES

Tedeschi, DJ

Todor, L

Adams, G

Ambrozewicz, P

Anciant, E

Anghinolfi, M

Asavapibhop, B

Audit, G

Avakian, H

Bagdasaryan, H

Ball, JP

Barrow, SP

Battaglieri, M

Beard, K

Bektasoglu, M

Bellis, M

Berman, BL

Bianchi, N

Biselli, AS

Boiarinov, S

Bouchigny, S

Bradford, R

Branford, D

Briscoe, WJ

Brooks, WK

Burkert, VD

Butuceanu, C

Calarco, JR

Carnahan, B

Chen, S

Ciciani, L

Cole, PL

Coleman, A

Cords, D

Corvisiero, P

Crabb, D

Crannell, H

Cummings, JP

De Sanctis, E

Degtyarenko, PV

Denizli, H

Dennis, L

De Vita, R

Dharmawardane, KV

机构：

[1] Thomas Jefferson Natl Accelerator Lab, Newport News, VA 23606 USA

[2] Ohio Univ, Athens, OH 45701 USA

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

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

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

[6] CEA Saclay, DAPNIA SPhN, F-91191 Gif Sur Yvette, France

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

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

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

[10] Univ Connecticut, Storrs, CT 06269 USA

[11] Duke Univ, Durham, NC 27708 USA

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

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

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

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

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

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

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

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

[20] Inst Phys Nucl Orsay, IN2P3, F-91406 Orsay, France

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

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

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

[24] MIT, Cambridge, MA 02139 USA

[25] Univ Massachusetts, Amherst, MA 01003 USA

[26] Moscow MV Lomonosov State Univ, Moscow 119899, Russia

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

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

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

[30] Univ Pittsburgh, Pittsburgh, PA 15260 USA

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

[32] Rice Univ, Houston, TX 77005 USA

[33] Univ Richmond, Richmond, VA 23173 USA

[34] Union Coll, Schenectady, NY 12308 USA

[35] Univ Virginia, Charlottesville, VA 22901 USA

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

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

[38] Yerevan Phys Inst, Yerevan 375036, Armenia

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.91.252001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In an exclusive measurement of the reaction gammad-->K+K- pn, a narrow peak that can be attributed to an exotic baryon with strangeness S=+1 is seen in the K(+)n invariant mass spectrum. The peak is at 1.542+/-0.005 GeV/c(2) with a measured width of 0.021 GeV/c(2) FWHM, which is largely determined by experimental mass resolution. The statistical significance of the peak is (5.2+/-0.6)sigma. The mass and width of the observed peak are consistent with recent reports of a narrow S=+1 baryon by other experimental groups.

引用

页数：5

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