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Determination of the scalar polarizabilities of the proton using beam asymmetry \(\Sigma_{3}\) in Compton scattering

  • The A2 Collaboration
  • V. Sokhoyan
  • E. J. Downie
  • E. Mornacchi
  • J. A. McGovern
  • N. Krupina
  • F. Afzal
  • J. Ahrens
  • C. S. Akondi
  • J. R. M. Annand
  • H. J. Arends
  • R. Beck
  • A. Braghieri
  • W. J. Briscoe
  • F. Cividini
  • C. Collicott
  • S. Costanza
  • A. Denig
  • M. Dieterle
  • M. Ferretti
  • S. Gardner
  • S. Garni
  • D. I. Glazier
  • D. Glowa
  • W. Gradl
  • G. Gurevich
  • D. Hamilton
  • D. Hornidge
  • G. M. Huber
  • A. Käser
  • V. L. Kashevarov
  • I. Keshelashvili
  • R. Kondratiev
  • M. Korolija
  • B. Krusche
  • V. Lensky
  • J. Linturi
  • V. Lisin
  • K. Livingston
  • I. J. D. MacGregor
  • R. Macrae
  • D. M. Manley
  • P. P. Martel
  • D. G. Middleton
  • R. Miskimen
  • A. Mushkarenkov
  • A. Neiser
  • M. Oberle
  • H. Ortega Spina
  • M. Ostrick
  • P. Ott
  • P. B. Otte
  • B. Oussena
  • D. Paudyal
  • P. Pedroni
  • A. Polonski
  • S. Prakhov
  • A. Rajabi
  • T. Rostomyan
  • A. Sarty
  • S. Schumann
  • K. Spieker
  • O. Steffen
  • I. I. Strakovsky
  • B. Strandberg
  • T. Strub
  • I. Supek
  • A. Thiel
  • M. Thiel
  • A. Thomas
  • M. Unverzagt
  • S. Wagner
  • D. P. Watts
  • J. Wettig
  • L. Witthauer
  • D. Werthmüller
  • M. Wolfes
  • L. Zana
Regular Article - Experimental Physics

Abstract.

The scalar dipole polarizabilities, \(\alpha_{E1}\) and \(\beta_{M1}\), are fundamental properties related to the internal dynamics of the nucleon. The currently accepted values of the proton polarizabilities were determined by fitting to unpolarized proton Compton scattering cross section data. The measurement of the beam asymmetry \(\Sigma_{3}\) in a certain kinematical range provides an alternative approach to the extraction of the scalar polarizabilities. At the Mainz Microtron (MAMI) the beam asymmetry was measured for Compton scattering below pion photoproduction threshold for the first time. The results are compared with model calculations and the influence of the experimental data on the extraction of the scalar polarizabilities is determined.

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Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • The A2 Collaboration
  • V. Sokhoyan
    • 1
    • 2
  • E. J. Downie
    • 2
  • E. Mornacchi
    • 1
  • J. A. McGovern
    • 3
  • N. Krupina
    • 1
  • F. Afzal
    • 4
  • J. Ahrens
    • 1
  • C. S. Akondi
    • 5
  • J. R. M. Annand
    • 6
  • H. J. Arends
    • 1
  • R. Beck
    • 4
  • A. Braghieri
    • 7
  • W. J. Briscoe
    • 2
  • F. Cividini
    • 1
  • C. Collicott
    • 1
    • 2
    • 8
    • 9
  • S. Costanza
    • 7
  • A. Denig
    • 1
  • M. Dieterle
    • 10
  • M. Ferretti
    • 1
  • S. Gardner
    • 6
  • S. Garni
    • 10
  • D. I. Glazier
    • 6
    • 11
  • D. Glowa
    • 11
  • W. Gradl
    • 1
  • G. Gurevich
    • 12
  • D. Hamilton
    • 6
  • D. Hornidge
    • 13
  • G. M. Huber
    • 14
  • A. Käser
    • 10
  • V. L. Kashevarov
    • 1
  • I. Keshelashvili
    • 10
  • R. Kondratiev
    • 12
  • M. Korolija
    • 15
  • B. Krusche
    • 10
  • V. Lensky
    • 1
    • 3
    • 16
    • 17
  • J. Linturi
    • 1
  • V. Lisin
    • 18
  • K. Livingston
    • 6
  • I. J. D. MacGregor
    • 6
  • R. Macrae
    • 6
  • D. M. Manley
    • 5
  • P. P. Martel
    • 1
    • 13
    • 19
  • D. G. Middleton
    • 1
    • 13
  • R. Miskimen
    • 20
  • A. Mushkarenkov
    • 1
    • 18
    • 20
  • A. Neiser
    • 1
  • M. Oberle
    • 10
  • H. Ortega Spina
    • 1
  • M. Ostrick
    • 1
  • P. Ott
    • 1
  • P. B. Otte
    • 1
  • B. Oussena
    • 1
    • 2
  • D. Paudyal
    • 14
  • P. Pedroni
    • 7
  • A. Polonski
    • 12
  • S. Prakhov
    • 1
    • 2
    • 21
  • A. Rajabi
    • 20
  • T. Rostomyan
    • 10
  • A. Sarty
    • 9
  • S. Schumann
    • 1
  • K. Spieker
    • 4
  • O. Steffen
    • 1
  • I. I. Strakovsky
    • 2
  • B. Strandberg
    • 6
  • T. Strub
    • 10
  • I. Supek
    • 15
  • A. Thiel
    • 4
  • M. Thiel
    • 1
  • A. Thomas
    • 1
  • M. Unverzagt
    • 1
  • S. Wagner
    • 1
  • D. P. Watts
    • 11
  • J. Wettig
    • 1
  • L. Witthauer
    • 10
  • D. Werthmüller
    • 10
    • 6
  • M. Wolfes
    • 1
  • L. Zana
    • 1
  1. 1.Institut für KernphysikUniversität MainzMainzGermany
  2. 2.Department of PhysicsThe George Washington UniversityWashingtonUSA
  3. 3.School of Physics and AstronomyUniversity of ManchesterManchesterUK
  4. 4.Helmholtz-Institut für Strahlen- und KernphysikUniversität BonnBonnGermany
  5. 5.Department of PhysicsKent State UniversityKentUSA
  6. 6.SUPA School of Physics and AstronomyUniversity of GlasgowGlasgowUK
  7. 7.INFN Sezione di PaviaPaviaItaly
  8. 8.Department of Physics and Atmospheric ScienceDalhousie UniversityHalifaxCanada
  9. 9.Department of Astronomy and PhysicsSaint Mary’s UniversityHalifaxCanada
  10. 10.Departement PhysikUniversität BaselBaselSwitzerland
  11. 11.School of PhysicsUniversity of EdinburghEdinburghUK
  12. 12.Institute for Nuclear ResearchMoscowRussia
  13. 13.Department of PhysicsMount Allison UniversitySackvilleCanada
  14. 14.Department of PhysicsUniversity of ReginaReginaCanada
  15. 15.Rudjer Boskovic InstituteZagrebCroatia
  16. 16.Institute for Theoretical and Experimental PhysicsMoscowRussia
  17. 17.National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)MoscowRussia
  18. 18.Lebedev Physical InstituteMoscowRussia
  19. 19.Laboratory for Nuclear ScienceMassachusetts Institute of TechnologyCambridgeUSA
  20. 20.Department of PhysicsUniversity of Massachusetts AmherstAmherstUSA
  21. 21.Department of Physics and AstronomyUniversity of California Los AngelesLos AngelesUSA

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