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

A. Esser | Zendy; M. Thiel | Zendy; P. Achenbach | Zendy; Kurt Aulenbacher | Zendy; S. Baunack | Zendy; J. Beričič | Zendy; D. Bosnar | Zendy; L. Correa | Zendy; M. Dehn | Zendy; M. O. Distler | Zendy; H. Fonvieille | Zendy; I. Friščić | Zendy; Mikhail Gorchtein | Zendy; Steffen Heidrich | Zendy; P. Herrmann | Zendy; M. Hoek | Zendy; S. Kegel | Zendy; Y. Kohl | Zendy; T. Kolar | Zendy; H.-J. Kreidel | Zendy; F. E. Maas | Zendy; H. Merkel | Zendy; M. Mihovilovič | Zendy; J. Müller | Zendy; U. Müller | Zendy; F. Nillius | Zendy; C. Palatchi | Zendy; K. Paschke | Zendy; J. Pochodzalla | Zendy; B. S. Schlimme | Zendy; M. Schoth | Zendy; Fabian Schulz | Zendy; S. Širca | Zendy; B. Spruck | Zendy; S. Štajner | Zendy; V. Tioukine | Zendy; A. Tyukin | Zendy; A. Weber | Zendy; C. Sfienti | Zendy

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

Author(s) -

A. Esser,

M. Thiel,

P. Achenbach,

Kurt Aulenbacher,

S. Baunack,

J. Beričič,

D. Bosnar,

L. Correa,

M. Dehn,

M. O. Distler,

H. Fonvieille,

I. Friščić,

Mikhail Gorchtein,

Steffen Heidrich,

P. Herrmann,

M. Hoek,

S. Kegel,

Y. Kohl,

T. Kolar,

H.-J. Kreidel,

F. E. Maas,

H. Merkel,

M. Mihovilovič,

J. Müller,

U. Müller,

F. Nillius,

C. Palatchi,

K. Paschke,

J. Pochodzalla,

B. S. Schlimme,

M. Schoth,

Fabian Schulz,

S. Širca,

B. Spruck,

S. Štajner,

V. Tioukine,

A. Tyukin,

A. Weber,

C. Sfienti

Publication year - 2018

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.121.022503

Subject(s) - physics , asymmetry , atomic physics , charge (physics) , cover (algebra) , nuclear magnetic resonance , quantum mechanics , mechanical engineering , engineering

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 ^{12}C. We cover the Q^{2} range between 0.02 and 0.05 GeV^{2}/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.

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