Beam-recoil polarization transfer in the nucleon resonance region in the exclusive (e)over-right-arrow p → e′ K+(Λ)over-right-arrow and (e)over-right-arrow p → e′ K+(Σ)over-right-arrow0 reactions at the CLAS spectrometer

被引：43

作者：

Carman, D. S. ^{[1
]}

Raue, B. A. ^{[2
]}

Adhikari, K. P. ^{[23
]}

Amaryan, M. J. ^{[23
]}

Anghinolfi, M. ^{[13
,32
]}

Baghdasaryan, H. ^{[30
]}

Battaglieri, M. ^{[13
,32
]}

Bellis, M. ^{[6
]}

Biselli, A. S. ^{[10
]}

Bookwalter, C. ^{[11
]}

Branford, D. ^{[9
]}

Briscoe, W. J. ^{[14
]}

Brooks, W. K. ^{[1
,28
]}

Burkert, V. D. ^{[1
]}

Cole, P. L. ^{[1
,16
]}

Collins, P. ^{[3
]}

Crede, V. ^{[11
]}

Daniel, A. ^{[24
]}

Dashyan, N. ^{[31
]}

De Vita, R. ^{[13
,32
]}

De Sanctis, E. ^{[12
]}

Deur, A. ^{[1
]}

Dhamija, S. ^{[2
]}

Djalali, C. ^{[27
]}

Dodge, G. E. ^{[23
]}

Eugenio, P. ^{[11
]}

Fedotov, G. ^{[20
]}

Fegan, S. ^{[15
]}

Fradi, A. ^{[25
]}

Gabrielyan, M. Y. ^{[2
]}

Giovanetti, K. L. ^{[18
]}

Girod, F. X. ^{[1
]}

Gohn, W. ^{[8
]}

Gonenc, A. ^{[2
]}

Gothe, R. W. ^{[27
]}

Hakobyan, H. ^{[28
,31
]}

Hanretty, C. ^{[11
]}

Hassall, N. ^{[15
]}

Hicks, K. ^{[24
]}

Holtrop, M. ^{[21
]}

Ilieva, Y. ^{[27
]}

Ireland, D. G. ^{[15
]}

Jo, H. S. ^{[25
]}

Johnstone, J. R. ^{[15
]}

Khetarpal, P. ^{[26
]}

Kim, W. ^{[19
]}

Kubarovsky, V. ^{[1
]}

Kuznetsov, V. ^{[19
]}

Livingston, K. ^{[15
]}

Mayer, M. ^{[23
]}

机构：

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

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

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

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

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

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

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

[8] Univ Connecticut, Storrs, CT 06269 USA

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

[10] Fairfield Univ, Fairfield, CT 06824 USA

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

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

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

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

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

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

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

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

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

[20] Skobeltsyn Nucl Phys Inst, RU-119899 Moscow, Russia

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

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

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

[24] Ohio Univ, Athens, OH 45701 USA

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

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

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

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

[29] Union Coll, Schenectady, NY 12308 USA

[30] Univ Virginia, Charlottesville, VA 22901 USA

[31] Yerevan Phys Inst, Yerevan 375036, Armenia

[32] Univ Genoa, Dept Phys, I-16146 Genoa, Italy

来源：

PHYSICAL REVIEW C | 2009年 / 79卷 / 06期

基金：

美国国家科学基金会;

关键词：

BARYON RESONANCES; PHOTOPRODUCTION; ENERGIES; LAMBDA; DECAYS; MODEL; PION; ELECTROPRODUCTION;

D O I：

10.1103/PhysRevC.79.065205

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：

Beam-recoil transferred polarizations for the exclusive (e) over right arrow p -> e' K+(Lambda) over right arrow, (Sigma) over right arrow (0) reactions have been measured using the Continuous Electron Beam Accelerator Facility's large acceptance spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. New measurements have been completed at beam energies of 4.261 and 5.754 GeV that span a range of momentum transfer Q(2) from 0.7 to 5.4 GeV2, invariant energy W from 1.6 to 2.6 GeV, and the full center-of-mass angular range of the K+ meson. These new data add to the existing CLAS K+Lambda measurements at 2.567 GeV, and provide the first-ever data for the K+ Sigma(0) channel in electroproduction. Comparisons of the data with several theoretical models are used to study the sensitivity to s-channel resonance contributions and the underlying reaction mechanism. Interpretations within two semiclassical partonic models are made to probe the underlying reaction mechanism and the s (s) over bar quark-pair creation dynamics.

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页数：23

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