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Phys Rev Lett. 2003 Feb 07;90(5):052501. doi: 10.1103/PhysRevLett.90.052501. Epub 2003 Feb 06.

Q2 dependence of nuclear transparency for exclusive rho0 production.

Physical review letters

A Airapetian, N Akopov, Z Akopov, M Amarian, V V Ammosov, A Andrus, E C Aschenauer, W Augustyniak, R Avakian, A Avetissian, E Avetissian, P Bailey, V Baturin, C Baumgarten, M Beckmann, S Belostotski, S Bernreuther, N Bianchi, H P Blok, H Böttcher, A Borissov, M Bouwhuis, J Brack, A Brüll, I Brunn, G P Capitani, H C Chiang, G Ciullo, M Contalbrigo, G R Court, P F Dalpiaz, R De Leo, L De Nardo, E De Sanctis, E Devitsin, P Di Nezza, M Düren, M Ehrenfried, A Elalaoui-Moulay, G Elbakian, F Ellinghaus, U Elschenbroich, J Ely, R Fabbri, A Fantoni, A Fechtchenko, L Felawka, B Fox, J Franz, S Frullani, Y Gärber, G Gapienko, V Gapienko, F Garibaldi, E Garutti, D Gaskell, G Gavrilov, V Gharibyan, G Graw, O Grebeniouk, L G Greeniaus, W Haeberli, K Hafidi, M Hartig, D Hasch, D Heesbeen, M Henoch, R Hertenberger, W H A Hesselink, A Hillenbrand, Y Holler, B Hommez, G Iarygin, A Izotov, H E Jackson, A Jgoun, R Kaiser, E Kinney, A Kisselev, K Königsmann, H Kolster, M Kopytin, V Korotkov, V Kozlov, B Krauss, V G Krivokhijine, L Lagamba, L Lapikás, A Laziev, P Lenisa, P Liebing, T Lindemann, W Lorenzon, N C R Makins, H Marukyan, F Masoli, F Menden, V Mexner, N Meyners, O Mikloukho, C A Miller, Y Miyachi, V Muccifora, A Nagaitsev, E Nappi, Y Naryshkin, A Nass, K Negodaeva, W-D Nowak, K Oganessyan, H Ohsuga, G Orlandi, S Podiatchev, S Potashov, D H Potterveld, M Raithel, D Reggiani, P Reimer, A Reischl, A R Reolon, K Rith, G Rosner, A Rostomyan, D Ryckbosch, I Sanjiev, I Savin, C Scarlett, A Schäfer, C Schill, G Schnell, K P Schüler, A Schwind, J Seibert, B Seitz, R Shanidze, T-A Shibata, V Shutov, M C Simani, K Sinram, M Stancari, M Statera, E Steffens, J J M Steijger, J Stewart, U Stösslein, H Tanaka, S Taroian, B Tchuiko, A Terkulov, S Tessarin, E Thomas, A Tkabladze, A Trzcinski, M Tytgat, G M Urciuoli, P Van Der Nat, G Van Der Steenhoven, R Van De Vyver, M C Vetterli, V Vikhrov, M G Vincter, J Visser, M Vogt, J Volmer, C Weiskopf, J Wendland, J Wilbert, T Wise, S Yen, S Yoneyama, B Zihlmann, H Zohrabian, P Zupranski,

Affiliations

  1. Yerevan Physics Institute, Armenia.

PMID: 12633347 DOI: 10.1103/PhysRevLett.90.052501

Abstract

Exclusive coherent and incoherent electroproduction of the rho(0) meson from 1H and 14N targets has been studied at the HERMES experiment as a function of coherence length (l(c)), corresponding to the lifetime of hadronic fluctuations of the virtual photon, and squared four-momentum of the virtual photon (-Q2). The ratio of 14N to 1H cross sections per nucleon, called nuclear transparency, was found to increase (decrease) with increasing l(c) for coherent (incoherent) rho(0) electroproduction. For fixed l(c), a rise of nuclear transparency with Q2 is observed for both coherent and incoherent rho(0) production, which is in agreement with theoretical calculations of color transparency.

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