Hyperon photoproduction in the nucleon resonance region -: art. no. 042201

被引：174

作者：

McNabb, JWC ^{[1
]}

Schumacher, RA

Todor, L

Adams, G

Anciant, E

Anghinolfi, M

Asavapibhop, B

Audit, G

Auger, T

Avakian, H

Bagdasaryan, H

Ball, JP

Barrow, S

Battaglieri, M

Beard, K

Bektasoglu, M

Bellis, M

Berman, BL

Bianchi, N

Biselli, AS

Boiarinov, S

Bonner, BE

Bouchigny, S

Bradford, R

Branford, D

Briscoe, WJ

Brooks, WK

Burkert, VD

Butuceanu, C

Calarco, JR

Carman, DS

Carnahan, B

Cetina, C

Ciciani, L

Cole, PL

Coleman, A

Cords, AD

Corvisiero, P

Crabb, D

Crannell, H

Cummings, JP

De Sanctis, E

DeVita, R

Degtyarenko, PV

Denizli, H

Dennis, L

Dharmawardane, KV

Dhuga, KS

Djalali, C

Dodge, GE

机构：

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

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

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

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

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

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

[7] Univ Connecticut, Storrs, CT 06269 USA

[8] Duke Univ, Durham, NC 27708 USA

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

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

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

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

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

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

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

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

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

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

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

[20] MIT, Cambridge, MA 02139 USA

[21] Univ Massachusetts, Amherst, MA 01003 USA

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

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

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

[25] Ohio Univ, Athens, OH 45701 USA

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

[27] Penn State Univ, University Pk, PA 16802 USA

[28] Univ Pittsburgh, Pittsburgh, PA 15260 USA

[29] Univ Roma 3, I-00146 Rome, Italy

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

[31] Rice Univ, Houston, TX 77005 USA

[32] Univ Richmond, Richmond, VA 23173 USA

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

[34] Univ Texas, El Paso, TX 79968 USA

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

来源：

PHYSICAL REVIEW C | 2004年 / 69卷 / 04期

关键词：

D O I：

10.1103/PhysRevC.69.042201

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

High-statistics cross sections and recoil polarizations for the reactions gamma+p-->K++Lambda and gamma+p-->K++Sigma(0) have been measured at CLAS for center-of-mass energies between 1.6 and 2.3 GeV. In the K(+)Lambda channel we confirm a resonance-like structure near W=1.9 GeV at backward kaon angles. Our data show more complex s- and u- channel behavior than previously seen, since structure is also present at forward angles, but not at central angles. The position and width change with angle, indicating that more than one resonance is playing a role. Large positive Lambda polarization at backward angles, which is also energy dependent, is consistent with sizable s- or u-channel contributions. Presently available model calculations cannot explain these aspects of the data.

引用

页码：042201 / 1

页数：5

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