Survey of A$_{LT′}$ asymmetries in semi-exclusive electron scattering on $^4$He and$^12$C

D. Protopopescu , F.W. Hersman , M. Holtrop , G. Adams , P. Ambrozewicz , E. Anciant , M. Anghinolfi , B. Asavapibhop , G. Asryan , G. Audit , T. Auger , H. Avakian , H. Bagdasaryan , J.P. Ball , S. Barrow , M. Battaglieri , K. Beard , M. Bektasoglu , M. Bellis , N. Benmouna , B.L. Berman , W. Bertozzi , N. Bianchi , A.S. Biselli , B.E. Bonner , S. Bouchigny (1) , R. Bradford , D. Branford , W.J. Briscoe , W.K. Brooks , V.D. Burkert , C. Butuceanu , J.R. Calarco , D.S. Carman , B. Carnahan , C. Cetina , S. Chen , P.L. Cole , A. Coleman , D. Cords , P. Corvisiero , D. Crabb , H. Crannell , J.P. Cummings , D. Debruyne , E. de Sanctis , R. Devita , P.V. Degtyarenko , L. Dennis , K.V. Dharmawardane , K.S. Dhuga , C. Djalali , G.E. Dodge , D. Doughty , P. Dragovitsch , M. Dugg , S. Dytman , O.P. Dzyubak , H. Egiyan , K.S. Egiyan , L. Elouadrhiri , A. Empl , P. Eugeni , R. Fatemial , R.J. Feuerbach , T.A. Forest , H. Funsten , G. Gavalian , S. Gilad , G.P. Gilfoyle , K.L. Giovanetti , Pascal Girard , C.I.O. Gordon , R.W. Gothe , K.A. Griffioen , M. Guidal (1) , M. Guillo , N. Guler , L. Guo , V. Gyurjyan , C. Hadjidakis (1) , R.S. Hakobyan , J. Hardie , D. Heddle , K. Hicks , I. Hleiqawi , J. Hu , C.E. Hyde-Wright , W. Ingram , D. Ireland , M.M. Ito , D. Jenkins , K. Joo , H.G. Juengst , J.H. Kelley , J.D. Kellie , M. Khandaker , K.Y. Kim , K. Kim , W. Kim , A. Klein , F.J. Klein , A.V. Klimenko , M. Klusman , M. Kossov , L.H. Kramer , S.E. Kuhn , J. Kuhn , J. Lachniet , J.M. Laget , J. Langheinrich , D. Lawrence , T. Lee , Ji Li , K. Livingston , K. Lukashin , J.J. Manak , C. Marchand , S. Mcaleer , S.T. Mclauchlan , J.W.C. Mcnabb , B.A. Mecking , J.J. Melone , M.D. Mestayer , C.A. Meyer , K. Mikhailov , R. Minehart , M. Mirazita , R. Miskimen , L. Morand , S.A. Morrow , V. Muccifora , J. Mueller , G.S. Mutchler , J. Napolitano , R. Nasseripour , S.O. Nelson , S. Niccolai , G. Niculescu , I. Niculescu , B.B. Niczyporuk , R.A. Niyazov , M. Nozar , G.V. O'Rielly , M. Osipenko , A. Ostrovidov , K. Park , E. Pasyuk , G. Peterson , S.A. Philips , N. Pivnyuk , D. Pocanic , O. Pogorelko , E. Polli , B.M. Preedom , J.W. Price , Y. Prok , L.M. Qin , B.A. Raue , G. Riccardi , G. Ricco , M. Ripani , B.G. Ritchie , F. Ronchetti , G. Rosner , P. Rossi , D. Rowntree , P.D. Rubin , J. Ryckebusch , F. Sabatié , K. Sabourov , C. Salgado , J.P. Santoro , V. Sapunenko , R.A. Schumacher , V.S. Serov , Y.G. Sharabian , J. Shaw , S. Simionatto , A.V. Skabelin , E.S. Smith , L.C. Smith , D.I. Sober , M. Spraker , A. Stavinsky , S. Stepanyan , B.E. Stokes , P. Stoler , S. Strauch , M. Taiuti , S. Taylor , D.J. Tedeschi , U. Thoma , R. Thompson , A. Tkabladze , L. Todor , C. Tur , M. Ungaro , M.F. Vineyard , A.V. Vlassov , K. Wang , L.B. Weinstein , H. Weller , D.P. Weygand , C.S. Whisnant , M. Williams , E. Wolin , M.H. Wood , A. Yegneswaran , J. Yun , L. Zana , B. Zhang

1 IPNO - Institut de Physique Nucléaire d'Orsay

Single spin azimuthal asymmetries ALT′ were measured at Jefferson Lab using 2.2 and 4.4 GeV longitudinally polarised electrons incident on 4He and 12C targets in the CLAS detector. ALT′ is related to the imaginary part of the longitudinal-transverse interference and in quasifree nucleon knockout it provides an unambiguous signature for final state interactions (FSI). Experimental values of ALT′ were found to be below 5%, typically |ALT′|less-than-or-equals, slant3% for data with good statistical precision. Optical model in eikonal approximation (OMEA) and relativistic multiple-scattering Glauber approximation (RMSGA) calculations are shown to be consistent with the measured asymmetries.

Mots clés: Comparisons with model predictions; NUCLEAR REACTIONS; 4He; 12C (polarised e; e′p); E=2.261; 4.461 GeV; measured; single spin azimuthal asymmetries vs missing momentum; missing energy; deduced; final state interaction effects

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

D. Protopopescu, F.W. Hersman, M. Holtrop, G. Adams, P. Ambrozewicz, et al.. Survey of A$_{LT′}$ asymmetries in semi-exclusive electron scattering on $^4$He and$^12$C. Nuclear Physics A, 2005, 748, pp.357-373. ⟨10.1016/j.nuclphysa.2004.11.009⟩. ⟨in2p3-00023914⟩