Evidence for the Onset of Color Transparency in $ρ^0$ Electroproduction off Nuclei
Creators: name: Fassi, L. El
name: Zana, L.
name: Hafidi, K.
name: Holtrop, M.
name: Mustapha, B.
name: Brooks, W. K.
name: Hakobyan, H.
name: Zheng, X.
name: Adhikari, K. P.
name: Adikaram, D.
name: Aghasyan, M.
name: Amaryan, M. J.
name: Anghinolfi, M.
name: Arrington, J.
name: Avakian, H.
name: Baghdasaryan, H.
name: Battaglieri, M.
name: Batourine, V.
name: Bedlinskiy, I.
name: Biselli, A. S.
name: Bookwalter, C.
name: Branford, D.
name: Briscoe, W. J.
name: Bultmann, S.
name: Burkert, V. D.
name: Carman, D. S.
name: Celentano, A.
name: Chandavar, S.
name: Cole, P. L.
name: Contalbrigo, M.
name: Crede, V.
name: D'Angelo, A.
name: Daniel, A.
name: Dashyan, N.
name: De Vita, R.
name: De Sanctis, E.
name: Deur, A.
name: Dey, B.
name: Dickson, R.
name: Djalali, C.
name: Dodge, G. E.
name: Doughty, D.
name: Dupre, R.
name: Egiyan, H.
name: Alaoui, A. El
name: Elouadrhiri, L.
name: Eugenio, P.
name: Fedotov, G.
name: Fegan, S.
name: Gabrielyan, M. Y.
name: Garcon, M.
name: Gevorgyan, N.
name: Gilfoyle, G. P.
name: Giovanetti, K. L.
name: Girod, F. X.
name: Goetz, J. T.
name: Gohn, W.
name: Golovatch, E.
name: Gothe, R. W.
name: Griffioen, K. A.
name: Guidal, M.
name: Guo, L.
name: Hanretty, C.
name: Heddle, D.
name: Hicks, K.
name: Holt, R. J.
name: Hyde, C. E.
name: Ilieva, Y.
name: Ireland, D. G.
name: Ishkhanov, B. S.
name: Isupov, E. L.
name: Jawalkar, S. S.
name: Keller, D.
name: Khandaker, M.
name: Khetarpal, P.
name: Kim, A.
name: Kim, W.
name: Klein, A.
name: Klein, F. J.
name: Kubarovsky, V.
name: Kuhn, S. E.
name: Kuleshov, S. V.
name: Kuznetsov, V.
name: Laget, J. M.
name: Lu, H. Y.
name: MacGregor, I. J. D.
name: Mao, Y.
name: Markov, N.
name: Mayer, M.
name: McAndrew, J.
name: McKinnon, B.
name: Meyer, C. A.
name: Mineeva, T.
name: Mirazita, M.
name: Mokeev, V.
name: Moreno, B.
name: Moutarde, H.
name: Munevar, E.
name: Nadel-Turonski, P.
name: Ni, A.
name: Niccolai, S.
name: Niculescu, G.
name: Niculescu, I.
name: Osipenko, M.
name: Ostrovidov, A. I.
name: Pappalardo, L.
name: Paremuzyan, R.
name: Park, K.
name: Park, S.
name: Pasyuk, E.
name: Pereira, S. Anefalos
name: Phelps, E.
name: Pisano, S.
name: Pozdniakov, S.
name: Price, J. W.
name: Procureur, S.
name: Protopopescu, D.
name: Raue, B. A.
name: Reimer, P. E.
name: Ricco, G.
name: Rimal, D.
name: Ripani, M.
name: Ritchie, B. G.
name: Rosner, G.
name: Rossi, P.
name: Sabatie, F.
name: Saini, M. S.
name: Salgado, C.
name: Schott, D.
name: Schumacher, R. A.
name: Seraydaryan, H.
name: Sharabian, Y. G.
name: Smith, E. S.
name: Smith, G. D.
name: Sober, D. I.
name: Sokhan, D.
name: Stepanyan, S. S.
name: Stepanyan, S.
name: Stoler, P.
name: Strauch, S.
name: Taiuti, M.
name: Tang, W.
name: Taylor, C. E.
name: Tedeschi, D. J.
name: Tkachenko, S.
name: Ungaro, M.
name: Vernarsky, B .
name: Vineyard, M. F.
name: Voskanyan, H.
name: Voutier, E.
name: Watts, D.
name: Weinstein, L. B.
name: Weygand, D. P.
name: Wood, M. H.
name: Zachariou, N.
name: Zhao, B.
name: Zhao, Z. W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We have measured the nuclear transparency of the incoherent diffractive $A(e,e'ρ^0)$ process in $^{12}$C and $^{56}$Fe targets relative to $^2$H using a 5 GeV electron beam. The nuclear transparency, the ratio of the produced $ρ^0$'s on a nucleus relative to deuterium, which is sensitive to $ρA$ interaction, was studied as function of the coherence length ($l_c$), a lifetime of the hadronic fluctuation of the virtual photon, and the four-momentum transfer squared ($Q^2$). While the transparency for both $^{12}$C and $^{56}$Fe showed no $l_c$ dependence, a significant $Q^2$ dependence was measured, which is consistent with calculations that included the color transparency effects.
description: 6 pages and 4 figures