Transverse Beam Spin Asymmetries at Backward Angles in Elastic Electron-Proton and Quasielastic Electron-Deuteron Scattering

被引：26

作者：

Androic, D. ^{[1
]}

Armstrong, D. S. ^{[2
]}

Arvieux, J. ^{[3
]}

Bailey, S. L. ^{[2
]}

Beck, D. H. ^{[4
]}

Beise, E. J. ^{[5
]}

Benesch, J. ^{[6
]}

Benmokhtar, F. ^{[5
,7
]}

Bimbot, L. ^{[3
]}

Birchall, J. ^{[8
]}

Bosted, P. ^{[6
]}

Breuer, H. ^{[5
]}

Capuano, C. L. ^{[2
]}

Chao, Y. -C. ^{[6
]}

Coppens, A. ^{[8
]}

Davis, C. A. ^{[9
]}

Ellis, C. ^{[5
]}

Flores, G. ^{[10
]}

Franklin, G. ^{[7
]}

Furget, C. ^{[11
]}

Gaskell, D. ^{[6
]}

Gericke, M. T. W. ^{[8
]}

Grames, J. ^{[6
]}

Guillard, G. ^{[11
]}

Hansknecht, J. ^{[6
]}

Horn, T. ^{[6
]}

Jones, M. K. ^{[6
]}

King, P. M. ^{[12
]}

Korsch, W. ^{[13
]}

Kox, S. ^{[11
]}

Lee, L. ^{[8
]}

Liu, J. ^{[14
]}

Lung, A. ^{[6
]}

Mammei, J. ^{[15
]}

Martin, J. W. ^{[16
]}

McKeown, R. D. ^{[14
]}

Micherdzinska, A. ^{[17
]}

Mihovilovic, M. ^{[18
]}

Mkrtchyan, H. ^{[19
]}

Muether, M. ^{[4
]}

Page, S. A. ^{[8
]}

Papavassiliou, V. ^{[10
]}

Pate, S. F. ^{[10
]}

Phillips, S. K. ^{[2
]}

Pillot, P. ^{[11
]}

Pitt, M. L. ^{[15
]}

Poelker, M. ^{[6
]}

Quinn, B. ^{[7
]}

Ramsay, W. D. ^{[8
]}

Real, J. -S. ^{[11
]}

机构：

[1] Univ Zagreb, Dept Phys, HR-41001 Zagreb, Croatia

[2] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA

[3] Univ Paris 11, Inst Phys Nucl Orsay, F-91406 Orsay, France

[4] Univ Illinois, Loomis Lab Phys, Urbana, IL 61801 USA

[5] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

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

[7] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA

[8] Univ Manitoba, Dept Phys, Winnipeg, MB R3T 2N2, Canada

[9] TRIUMF, Vancouver, BC V6T 2A3, Canada

[10] New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA

[11] Univ Grenoble 1, CNRS, Inst Polytech Grenoble, LPSC,IN2P3, Grenoble, France

[12] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA

[13] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA

[14] CALTECH, Kellogg Radiat Lab, Pasadena, CA 91125 USA

[15] Virginia Tech, Dept Phys, Blacksburg, VA 24061 USA

[16] Univ Winnipeg, Dept Phys, Winnipeg, MB R3B 2E9, Canada

[17] George Washington Univ, Dept Phys, Washington, DC 20052 USA

[18] Jozef Stefan Inst, Ljubljana 1000, Slovenia

[19] Yerevan Phys Inst, Yerevan 375036, Armenia

[20] Louisiana Tech Univ, Dept Phys, Ruston, LA 71272 USA

[21] Hendrix Coll, Dept Phys, Conway, AR 72032 USA

[22] Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy

[23] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy

[24] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 01期

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;

关键词：

D O I：

10.1103/PhysRevLett.107.022501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the beam-normal single-spin asymmetries in elastic scattering of transversely polarized electrons from the proton, and performed the first measurement in quasielastic scattering on the deuteron, at backward angles (lab scattering angle of 108 degrees) for Q(2) = 0.22 GeV2/c(2) and 0.63 GeV2/c(2) at beam energies of 362 and 687 MeV, respectively. The asymmetry arises due to the imaginary part of the interference of the two-photon exchange amplitude with that of single-photon exchange. Results for the proton are consistent with a model calculation which includes inelastic intermediate hadronic (pi N) states. An estimate of the beam-normal single-spin asymmetry for the scattering from the neutron is made using a quasistatic deuterium approximation, and is also in agreement with theory.

引用

页数：5

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