First Measurement of the Q2 Dependence of the Beam-Normal Single Spin Asymmetry for Elastic Scattering off Carbon

被引：16

作者：

Esser, A. ^{[1
]}

Thiel, M. ^{[1
]}

Achenbach, P. ^{[1
]}

Aulenbacher, K. ^{[1
]}

Baunack, S. ^{[1
]}

Bericic, J. ^{[2
]}

Bosnar, D. ^{[3
]}

Correa, L. ^{[4
]}

Dehn, M. ^{[1
]}

Distler, M. O. ^{[1
]}

Fonvieille, H. ^{[4
]}

Friscic, I. ^{[3
]}

Gorchtein, M. ^{[1
]}

Heidrich, S. ^{[1
]}

Herrmann, P. ^{[1
]}

Hoek, M. ^{[1
]}

Kegel, S. ^{[1
]}

Kohl, Y. ^{[1
]}

Kolar, T. ^{[2
,5
]}

Kreidel, H. -J. ^{[1
]}

Maas, F. E. ^{[1
]}

Merkel, H. ^{[1
]}

Mihovilovic, M. ^{[1
,2
]}

Mueller, J. ^{[1
]}

Mueller, U. ^{[1
]}

Nillius, F. ^{[1
]}

Palatchi, C. ^{[6
]}

Paschke, K. D. ^{[6
]}

Pochodzalla, J. ^{[1
]}

Schlimme, B. S. ^{[1
]}

Schoth, M. ^{[1
]}

Schulz, F. ^{[1
]}

Sirca, S. ^{[2
,5
]}

Spruck, B. ^{[1
]}

Stajner, S. ^{[2
]}

Tioukine, V. ^{[1
]}

Tyukin, A. ^{[1
]}

Weber, A. ^{[1
]}

Sfienti, C. ^{[1
]}

机构：

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

[2] Jozef Stefan Inst, SI-1000 Ljubljana, Slovenia

[3] Univ Zagreb, Fac Sci, Dept Phys, Zagreb 10000, Croatia

[4] Clermont Univ, Univ Blaise Pascal, CNRS IN2P3, LPC, BP 10448, F-63000 Clermont Ferrand, France

[5] Univ Ljubljana, Dept Phys, SI-1000 Ljubljana, Slovenia

[6] Univ Virginia, Charlottesville, VA 22903 USA

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 121卷 / 02期

关键词：

ELECTRON-PROTON SCATTERING; MAMI; MICROTRON;

D O I：

10.1103/PhysRevLett.121.022503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the first Q(2)-dependent measurement of the beam-normal single spin asymmetry A(n) in the elastic scattering of 570 MeV vertically polarized electrons off C-12. We cover the Q(2) range between 0.02 and 0.05 GeV2/c(2) and determine A(n) at four different Q(2) values. The experimental results are compared to a theoretical calculation that relates A(n) to the imaginary part of the two-photon exchange amplitude. The result emphasizes that the Q(2) behavior of A(n) given by the ratio of the Compton to charge form factors cannot be treated independently of the target nucleus.

引用

页数：6

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