Polarization Transfer in the He-4((e)over-right-arrow, e '(p)over-right-arrow)H-3 Reaction at Q(2)=0.8 and 1.3 (GeV/c)(2)


Proton recoil polarization was measured in the quasielastic He-4((e) over right arrow, e '(p) over right arrow)H-3 reaction at Q(2) = 0.8 and 1.3 (GeV/c)(2) with unprecedented precision. The polarization-transfer coefficients are found to differ from those of the H-1((e) over right arrow, e '(p) over right arrow) reaction, contradicting a relativistic distorted-wave approximation and favoring either the inclusion of medium-modified proton form factors predicted by the quark-meson coupling model or a spin-dependent charge-exchange final-state interaction. For the first time, the polarization-transfer ratio is studied as a function of the virtuality of the proton.





Paolone,M.;Malace,S. P.;Strauch,S.;Albayrak,I.;Arrington,J.;Berman,B. L.;Brash,E. J.;Briscoe,B.;Camsonne,A.;Chen,J. -P;Christy,M. E.;Chudakov,E.;Cisbani,E.;Craver,B.;Cusanno,F.;Ent,R.;Garibaldi,F.;Gilman,R.;Glamazdin,O.;Glister,J.;Higinbotham,D. W.;Hyde-Wright,C. E.;Ilieva,Y.;de Jager,C. W.;Jiang,X.;Jones,M. K.;Keppel,C. E.;Khrosinkova,E.;Kuchina,E.;Kumbartzki,G.;Lee,B.;Lindgren,R.;Margaziotis,D. J.;Meekins,D.;Michaels,R.;Park,K.;Pentchev,L.;Perdrisat,C. F.;Piasetzky,E.;Punjabi,V. A.;Puckett,A. J. R.;Qian,X.;Qiang,Y.;Ransome,R. D.;Saha,A.;Sarty,A. J.;Schulte,E.;Solvignon,P.;Subedi,R. R.;Tang,L.;Tedeschi,D.;Tvaskis,V.;Udias,J. M.;Ulmer,P. E.;Vignote,J. R.;Wesselmann,F. R.;Wojtsekhowski,B.;Zhan,X.;E03-104 Collaboration. 2010. Polarization Transfer in the He-4((e)over-right-arrow, e '(p)over-right-arrow)H-3 Reaction at Q(2)=0.8 and 1.3 (GeV/c)(2). Physical Review Letters 105(7): 72001-72001.

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