New measurements of the transverse beam asymmetry for elastic electron scattering from selected nuclei

S. Abrahamyan; A. Acha; A. Afanasev; Z. Ahmed; H. Albataineh; K. Aniol; D. S. Armstrong; W. Armstrong; J. Arrington; T. Averett; B. Babineau; S. L. Bailey; J. Barber; A. Barbieri; A. Beck; V. Bellini; R. Beminiwattha; H. Benaoum; J. Benesch; F. Benmokhtar; P. Bertin; T. Bielarski; W. Boeglin; P. Bosted; F. Butaru; E. Burtin; J. Cahoon; A. Camsonne; M. Canan; P. Carter; C. C. Chang; G. D. Cates; Y. C. Chao; C. Chen; J. P. Chen; Seonho Choi; E. Chudakov; E. Cisbani; B. Craver; F. Cusanno; M. M. Dalton; R. De Leo; K. De Jager; W. Deconinck; P. Decowski; D. Deepa; X. Deng; A. Deur; D. Dutta; A. Etile

doi:10.1103/PhysRevLett.109.192501

New measurements of the transverse beam asymmetry for elastic electron scattering from selected nuclei

S. Abrahamyan, A. Acha, A. Afanasev, Z. Ahmed, H. Albataineh, K. Aniol, D. S. Armstrong, W. Armstrong, J. Arrington, T. Averett, B. Babineau, S. L. Bailey, J. Barber, A. Barbieri, A. Beck, V. Bellini, R. Beminiwattha, H. Benaoum, J. Benesch, F. BenmokhtarP. Bertin, T. Bielarski, W. Boeglin, P. Bosted, F. Butaru, E. Burtin, J. Cahoon, A. Camsonne, M. Canan, P. Carter, C. C. Chang, G. D. Cates, Y. C. Chao, C. Chen, J. P. Chen, Seonho Choi, E. Chudakov, E. Cisbani, B. Craver, F. Cusanno, M. M. Dalton, R. De Leo, K. De Jager, W. Deconinck, P. Decowski, D. Deepa, X. Deng, A. Deur, D. Dutta, A. Etile

Physics and Astronomy (Twin Cities)

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Abstract

We have measured the beam-normal single-spin asymmetry A _n in the elastic scattering of 1-3 GeV transversely polarized electrons from H1 and for the first time from He4, C12, and Pb208. For H1, He4, and C12, the measurements are in agreement with calculations that relate A _n to the imaginary part of the two-photon exchange amplitude including inelastic intermediate states. Surprisingly, the Pb208 result is significantly smaller than the corresponding prediction using the same formalism. These results suggest that a systematic set of new A _n measurements might emerge as a new and sensitive probe of the structure of heavy nuclei.

Original language	English (US)
Article number	192501
Journal	Physical review letters
Volume	109
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.109.192501
State	Published - Nov 5 2012

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Abrahamyan, S., Acha, A., Afanasev, A., Ahmed, Z., Albataineh, H., Aniol, K., Armstrong, D. S., Armstrong, W., Arrington, J., Averett, T., Babineau, B., Bailey, S. L., Barber, J., Barbieri, A., Beck, A., Bellini, V., Beminiwattha, R., Benaoum, H., Benesch, J., ... Etile, A. (2012). New measurements of the transverse beam asymmetry for elastic electron scattering from selected nuclei. Physical review letters, 109(19), Article 192501. https://doi.org/10.1103/PhysRevLett.109.192501

Abrahamyan, S, Acha, A, Afanasev, A, Ahmed, Z, Albataineh, H, Aniol, K, Armstrong, DS, Armstrong, W, Arrington, J, Averett, T, Babineau, B, Bailey, SL, Barber, J, Barbieri, A, Beck, A, Bellini, V, Beminiwattha, R, Benaoum, H, Benesch, J, Benmokhtar, F, Bertin, P, Bielarski, T, Boeglin, W, Bosted, P, Butaru, F, Burtin, E, Cahoon, J, Camsonne, A, Canan, M, Carter, P, Chang, CC, Cates, GD, Chao, YC, Chen, C, Chen, JP, Choi, S, Chudakov, E, Cisbani, E, Craver, B, Cusanno, F, Dalton, MM, De Leo, R, De Jager, K, Deconinck, W, Decowski, P, Deepa, D, Deng, X, Deur, A, Dutta, D & Etile, A 2012, 'New measurements of the transverse beam asymmetry for elastic electron scattering from selected nuclei', Physical review letters, vol. 109, no. 19, 192501. https://doi.org/10.1103/PhysRevLett.109.192501

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title = "New measurements of the transverse beam asymmetry for elastic electron scattering from selected nuclei",

abstract = "We have measured the beam-normal single-spin asymmetry A n in the elastic scattering of 1-3 GeV transversely polarized electrons from H1 and for the first time from He4, C12, and Pb208. For H1, He4, and C12, the measurements are in agreement with calculations that relate A n to the imaginary part of the two-photon exchange amplitude including inelastic intermediate states. Surprisingly, the Pb208 result is significantly smaller than the corresponding prediction using the same formalism. These results suggest that a systematic set of new A n measurements might emerge as a new and sensitive probe of the structure of heavy nuclei.",

author = "S. Abrahamyan and A. Acha and A. Afanasev and Z. Ahmed and H. Albataineh and K. Aniol and Armstrong, {D. S.} and W. Armstrong and J. Arrington and T. Averett and B. Babineau and Bailey, {S. L.} and J. Barber and A. Barbieri and A. Beck and V. Bellini and R. Beminiwattha and H. Benaoum and J. Benesch and F. Benmokhtar and P. Bertin and T. Bielarski and W. Boeglin and P. Bosted and F. Butaru and E. Burtin and J. Cahoon and A. Camsonne and M. Canan and P. Carter and Chang, {C. C.} and Cates, {G. D.} and Chao, {Y. C.} and C. Chen and Chen, {J. P.} and Seonho Choi and E. Chudakov and E. Cisbani and B. Craver and F. Cusanno and Dalton, {M. M.} and {De Leo}, R. and {De Jager}, K. and W. Deconinck and P. Decowski and D. Deepa and X. Deng and A. Deur and D. Dutta and A. Etile",

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doi = "10.1103/PhysRevLett.109.192501",

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T1 - New measurements of the transverse beam asymmetry for elastic electron scattering from selected nuclei

AU - Abrahamyan, S.

AU - Acha, A.

AU - Afanasev, A.

AU - Ahmed, Z.

AU - Albataineh, H.

AU - Aniol, K.

AU - Armstrong, D. S.

AU - Armstrong, W.

AU - Arrington, J.

AU - Averett, T.

AU - Babineau, B.

AU - Bailey, S. L.

AU - Barber, J.

AU - Barbieri, A.

AU - Beck, A.

AU - Bellini, V.

AU - Beminiwattha, R.

AU - Benaoum, H.

AU - Benesch, J.

AU - Benmokhtar, F.

AU - Bertin, P.

AU - Bielarski, T.

AU - Boeglin, W.

AU - Bosted, P.

AU - Butaru, F.

AU - Burtin, E.

AU - Cahoon, J.

AU - Camsonne, A.

AU - Canan, M.

AU - Carter, P.

AU - Chang, C. C.

AU - Cates, G. D.

AU - Chao, Y. C.

AU - Chen, C.

AU - Chen, J. P.

AU - Choi, Seonho

AU - Chudakov, E.

AU - Cisbani, E.

AU - Craver, B.

AU - Cusanno, F.

AU - Dalton, M. M.

AU - De Leo, R.

AU - De Jager, K.

AU - Deconinck, W.

AU - Decowski, P.

AU - Deepa, D.

AU - Deng, X.

AU - Deur, A.

AU - Dutta, D.

AU - Etile, A.

PY - 2012/11/5

Y1 - 2012/11/5

N2 - We have measured the beam-normal single-spin asymmetry A n in the elastic scattering of 1-3 GeV transversely polarized electrons from H1 and for the first time from He4, C12, and Pb208. For H1, He4, and C12, the measurements are in agreement with calculations that relate A n to the imaginary part of the two-photon exchange amplitude including inelastic intermediate states. Surprisingly, the Pb208 result is significantly smaller than the corresponding prediction using the same formalism. These results suggest that a systematic set of new A n measurements might emerge as a new and sensitive probe of the structure of heavy nuclei.

AB - We have measured the beam-normal single-spin asymmetry A n in the elastic scattering of 1-3 GeV transversely polarized electrons from H1 and for the first time from He4, C12, and Pb208. For H1, He4, and C12, the measurements are in agreement with calculations that relate A n to the imaginary part of the two-photon exchange amplitude including inelastic intermediate states. Surprisingly, the Pb208 result is significantly smaller than the corresponding prediction using the same formalism. These results suggest that a systematic set of new A n measurements might emerge as a new and sensitive probe of the structure of heavy nuclei.

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DO - 10.1103/PhysRevLett.109.192501

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VL - 109

JO - Physical review letters

JF - Physical review letters

IS - 19

M1 - 192501

ER -

New measurements of the transverse beam asymmetry for elastic electron scattering from selected nuclei

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