Evidence for the onset of color transparency in ρ⁰ electroproduction off nuclei

El Fassi, L. et al. (2012) Evidence for the onset of color transparency in ρ⁰ electroproduction off nuclei. Physics Letters B, 712(4-5), pp. 326-330. (doi: 10.1016/j.physletb.2012.05.019)

Abstract

We have measured the nuclear transparency of the incoherent diffractive A(e,e′ρ0) process in 12C and 56Fe targets relative to 2H using a 5 GeV electron beam. The nuclear transparency, the ratio of the produced ρ0ʼs on a nucleus relative to deuterium, which is sensitive to ρA interaction, was studied as function of the coherence length (lc), a lifetime of the hadronic fluctuation of the virtual photon, and the four-momentum transfer squared (Q2). While the transparency for both 12C and 56Fe showed no lc dependence, a significant Q2 dependence was measured, which is consistent with calculations that included the color transparency effects.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Sokhan, Dr Daria and Fegan, Mr Stuart and Protopopescu, Dr Dan and MacGregor, Professor Douglas and McKinnon, Dr Bryan and Ireland, Professor David and Rosner, Professor Guenther
• Authors: El Fassi, L., Zana, L., Hafidi, K., Holtrop, M., Mustapha, B., Brooks, W.K., Hakobyan, H., Zheng, X., Adhikari, K.P., Adikaram, D., Aghasyan, M., Amaryan, M.J., Anghinolfi, M., Arrington, J., Avakian, H., Baghdasaryan, H., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A.S., Bookwalter, C., Branford, D., Briscoe, W.J., Bültmann, S., Burkert, V.D., Carman, D.S., Celentano, A., Chandavar, S., Cole, P.L., Contalbrigo, M., Crede, V., DʼAngelo, A., Daniel, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Dey, B., Dickson, R., Djalali, C., Dodge, G.E., Doughty, D., Dupre, R., Egiyan, H., El Alaoui, A., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fegan, S., Gabrielyan, M.Y., Garçon, M., Gevorgyan, N., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Goetz, J.T., Gohn, W., Golovatch, E., Gothe, R.W., Griffioen, K.A., Guidal, M., Guo, L., Hanretty, C., Heddle, D., Hicks, K., Holt, R.J., Hyde, C.E., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Jawalkar, S.S., Keller, D., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F.J., Kubarovsky, V., Kuhn, S.E., Kuleshov, S.V., Kuznetsov, V., Laget, J.M., Lu, H.Y., MacGregor, I.J.D., Mao, Y., Markov, N., Mayer, M., McAndrew, J., McKinnon, B., Meyer, C.A., Mineeva, T., Mirazita, M., Mokeev, V., Moreno, B., Moutarde, H., Munevar, E., Nadel-Turonski, P., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A.I., Pappalardo, L.L., Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Anefalos Pereira, S., Phelps, E., Pozdniakov, S., Price, J.W., Procureur, S., Protopopescu, D., Raue, B.A., Reimer, P.E., Ricco, G., Rimal, D., Ripani, M., Ritchie, B.G., Rosner, G., Rossi, P., Sabatié, F., Saini, M.S., Salgado, C., Schott, D., Schumacher, R.A., Seraydaryan, H., Sharabian, Y.G., Smith, E.S., Smith, G.D., Sober, D.I., Sokhan, D., Stepanyan, S.S., Stepanyan, S., Stoler, P., Strauch, S., Taiuti, M., Tang, W., Taylor, C.E., Tedeschi, D.J., Tkachenko, S., Ungaro, M., Vernarsky, B., Vineyard, M.F., Voskanyan, H., Voutier, E., Watts, D., Weinstein, L.B., Weygand, D.P., Wood, M.H., Zachariou, N., Zhao, B., and Zhao, Z.W.
• College/School: UNSPECIFIED
• Journal Name: Physics Letters B
• Publisher: Elsevier BV
• ISSN: 0370-2693