Determination of the Proton Spin Structure Functions for $0.05 < Q^{2} < 5 GeV^{2}$ using CLAS

Robert Fersch , Nevzat Guler , Peter Bosted , Alexandre Deur , Keith Griffioen , Christopher Keith , Sebastian Kuhn , Ralph Minehart , Yelena Prok , K. P. Adhikari , Z. Akbar , M. J. Amaryan , S. Anefalos Pereira , G. Asryan , H. Avakian , J. Ball (1) , A. Balossino , N. A. Baltzell , M. Battaglieri , I. Bedlinskiy , A. S. Biselli , W. J. Briscoe , W. K. Brooks , S. Bultmann , V. D. Burkert , Frank Thanh Cao , D. S. Carman , S. Careccia , A. Celentano , S. Chandavar , G. Charles , T. Chetry , G. Ciullo , L. Clark , L. Colaneri , P. L. Cole , N. Compton , M. Contalbrigo , O. Cortes , V. Crede , A. d'Angelo , N. Dashyan , R. de Vita , E. de Sanctis , C. Djalali , G. E. Dodge , R. Dupre (2) , H. Egiyan , A. El Alaoui , L. El Fassi , L. Elouadrhiri , P. Eugenio , E. Fanchini , A. Fedotov , A. Filippi , J. A. Fleming , T. A. Forest , M. Garc Con (1) , G. Gavalian , Y. Ghandilyan , G. P. Gilfoyle , K. L. Giovanetti , F. X. Girod (1) , C. Gleason , E. Golovatch , R. W. Gothe , M. Guidal (2) , L. Guo , K. Hafidi , H. Hakobyan , C. Hanretty , N. Harrison , D. Heddle , K. Hicks , M. Holtrop , S.M. Hughes , Y. Ilieva , D.G. Ireland , B.S. Ishkhanov , E.L. Isupov , D. Jenkins , K. Joo , D. Keller , G. Khachatryan , M. Khachatryan , M. Khandaker , A. Kim , W. Kim , A. Klein , V. Kubarovsky , V. G. Lagerquist , L. Lanza , P. Lenisa , K. Livingston , H. Y. Lu , B. Mckinnon , C. A. Meyer , M. Mirazita , V. Mokeev , R. A. Montgomery , A. Movsisyan , C. Munoz Camacho (2) , G. Murdoch , P. Nadel-Turonski , S. Niccolai (2) , G. Niculescu , I. Niculescu , M. Osipenko , A. I. Ostrovidov , M. Paolone , R. Paremuzyan , K. Park , E. Pasyuk , W. Phelps , S. Pisano , O. Pogorelko , J. W. Price , D. Protopopescu , B. A. Raue , M. Ripani , D. Riser , A. Rizzo , G. Rosner , P. Rossi , P. Roy , F. Sabatie (1) , C. Salgado , R. A. Schumacher , Y. G. Sharabian , A. Simonyan , Iu. Skorodumina , G. D. Smith , D. Sokhan , N. Sparveris , I. Stankovic , S. Stepanyan , I. I. Strakovsky , S. Strauch , M. Taiuti , Ye Tian , B. Torayev , M. Ungaro , H. Voskanyan , E. Voutier (2) , N.K. Walford (1) , D.P. Watts , X. Wei , L.B. Weinstein , N. Zachariou , J. Zhang

1 DPHN - Département de Physique Nucléaire (ex SPhN)
2 IPNO - Institut de Physique Nucléaire d'Orsay

We present the results of our final analysis of the full data set of g1p(Q2), the spin structure function of the proton, collected using CLAS at Jefferson Laboratory in 2000–2001. Polarized electrons with energies of 1.6, 2.5, 4.2, and 5.7 GeV were scattered from proton targets (NH315 dynamically polarized along the beam direction) and detected with CLAS. From the measured double spin asymmetries, we extracted virtual photon asymmetries A1p and A2p and spin structure functions g1p and g2p over a wide kinematic range (0.05 GeV2

Mots clés: 13.60.Hb; 13.88.+e; 14.20.Dh; nucleon structure; p: spin; structure function: spin; spin: asymmetry; photon: virtual; photon: asymmetry; absorption; moment; quark: polarization; duality: quark hadron; Born approximation; deep inelastic scattering; inelastic scattering; elastic scattering; microwaves; background; p: target; electron: polarized beam; hydrogen: target; deuteron: target; CLAS; Jefferson Lab; experimental results; 1.6 GeV2.5 GeV4.2 GeV5.7 GeV

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

Robert Fersch, Nevzat Guler, Peter Bosted, Alexandre Deur, Keith Griffioen, et al.. Determination of the Proton Spin Structure Functions for $0.05 < Q^{2} < 5 GeV^{2}$ using CLAS. Phys.Rev.C, 2017, 96 (6), pp.065208. ⟨10.1103/PhysRevC.96.065208⟩. ⟨hal-01704889⟩