Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV

被引：46

作者：

Al Ghoul, H. ^{[7
]}

Anassontzis, E. G. ^{[2
]}

Austregesilo, A. ^{[14
]}

Barbosa, F. ^{[14
]}

Barnes, A. ^{[5
]}

Beattie, T. D. ^{[22
]}

Bennett, D. W. ^{[12
]}

Berdnikov, V. V. ^{[17
]}

Black, T. ^{[20
]}

Boeglin, W. ^{[6
]}

Briscoe, W. J. ^{[8
]}

Brooks, W. K. ^{[23
]}

Cannon, B. E. ^{[7
]}

Chernyshov, O. ^{[13
]}

Chudakov, E. ^{[14
]}

Crede, V. ^{[7
]}

Dalton, M. M. ^{[14
]}

Deur, A. ^{[14
]}

Dobbs, S. ^{[21
]}

Dolgolenko, A. ^{[13
]}

Dugger, M. ^{[1
]}

Dzhygadlo, R. ^{[11
]}

Egiyan, H. ^{[14
]}

Eugenio, P. ^{[7
]}

Fanelli, C. ^{[16
]}

Foda, A. M. ^{[22
]}

Frye, J. ^{[12
]}

Furletov, S. ^{[14
]}

Gan, L. ^{[20
]}

Gasparian, A. ^{[19
]}

Gerasimov, A. ^{[13
]}

Gevorgyan, N. ^{[26
]}

Goetzen, K. ^{[11
]}

Goryachev, V. S. ^{[13
]}

Guo, L. ^{[6
]}

Hakobyan, H. ^{[23
]}

Hardin, J. ^{[13
]}

Henderson, A. ^{[7
]}

Huber, G. M. ^{[22
]}

Ireland, D. G. ^{[10
]}

Ito, M. M. ^{[14
]}

Jarvis, N. S. ^{[3
]}

Jones, R. T. ^{[5
]}

Kakoyan, V. ^{[26
]}

Kamel, M. ^{[6
]}

Klein, F. J. ^{[4
]}

Kliemt, R. ^{[11
]}

Kourkoumeli, C. ^{[2
]}

Kuleshov, S. ^{[23
]}

Kuznetsov, I. ^{[24
,25
]}

机构：

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

[2] Univ Athens, Athens 15771, Greece

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

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

[5] Univ Connecticut, Storrs, CT 06269 USA

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

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

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

[9] Univ Ghent, Proeftuinstr 86, B-9000 Ghent, Belgium

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

[11] GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany

[12] Indiana Univ, Bloomington, IN 47405 USA

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

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

[15] Univ Massachusetts, Amherst, MA 01003 USA

[16] MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[17] Natl Res Nucl Univ Moscow, Inst Engn Phys, Moscow 115409, Russia

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

[19] North Carolina A&T State Univ, Greensboro, NC 27411 USA

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

[21] Northwestern Univ, Evanston, IL 60208 USA

[22] Univ Regina, Regina, SK S4S 0A2, Canada

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

[24] Tomsk State Univ, Tomsk 634050, Russia

[25] Tomsk Polytech Univ, Tomsk 634050, Russia

[26] Yerevan Phys Inst, AI Alikhanian Natl Sci Lab, Yerevan 0036, Armenia

[27] Coll William & Mary, Williamsburg, VA 23185 USA

[28] Wuhan Univ, Wuhan 430072, Hubei, Peoples R China

来源：

PHYSICAL REVIEW C | 2017年 / 95卷 / 04期

基金：

中国国家自然科学基金; 美国国家科学基金会; 加拿大自然科学与工程研究理事会; 俄罗斯基础研究基金会; 英国科学技术设施理事会;

关键词：

GLUEX; CALORIMETER; HYDROGEN; ENERGY;

D O I：

10.1103/PhysRevC.95.042201

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：

We report measurements of the photon beam asymmetry Sigma for the reactions (gamma) over right arrowp -> p pi(0) and gamma p -> p eta from the GLUEX experiment using a 9 GeV linearly polarized, tagged photon beam incident on a liquid hydrogen target in Jefferson Lab's Hall D. The asymmetries, measured as a function of the proton momentum transfer, possess greater precision than previous pi(0) measurements and are the first. measurements in this energy regime. The results are compared with theoretical predictions based on t-channel, quasiparticle exchange and constrain the axial-vector component of the neutral meson production mechanism in these models.

引用

页数：6

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