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. 2007 Dec 31;99(26):262302.
doi: 10.1103/PhysRevLett.99.262302. Epub 2007 Dec 27.

Search for medium modifications of the rho meson

R Nasseripour  1 , M H Wood, C Djalali, D P Weygand, C Tur, U Mosel, P Muehlich, G Adams, M J Amaryan, P Ambrozewicz, M Anghinolfi, G Asryan, H Avakian, H Bagdasaryan, N Baillie, J P Ball, N A Baltzell, S Barrow, M Battaglieri, I Bedlinskiy, M Bektasoglu, M Bellis, N Benmouna, B L Berman, A S Biselli, L Blaszczyk, S Bouchigny, S Boiarinov, R Bradford, D Branford, W J Briscoe, W K Brooks, S Bültmann, V D Burkert, C Butuceanu, J R Calarco, S L Careccia, D S Carman, B Carnahan, L Casey, S Chen, P L Cole, P Collins, P Coltharp, D Crabb, H Crannell, V Crede, J P Cummings, N Dashyan, R De Masi, R De Vita, E De Sanctis, P V Degtyarenko, H Denizli, L Dennis, A Deur, K V Dharmawardane, R Dickson, G E Dodge, D Doughty, M Dugger, S Dytman, O P Dzyubak, H Egiyan, K S Egiyan, L El Fassi, L Elouadrhiri, P Eugenio, G Fedotov, G Feldman, R J Feuerbach, H Funsten, M Garçon, G Gavalian, G P Gilfoyle, K L Giovanetti, F X Girod, J T Goetz, C I O Gordon, R W Gothe, K A Griffioen, M Guidal, N Guler, L Guo, V Gyurjyan, C Hadjidakis, K Hafidi, H Hakobyan, R S Hakobyan, C Hanretty, J Hardie, F W Hersman, K Hicks, I Hleiqawi, M Holtrop, C E Hyde-Wright, Y Ilieva, D G Ireland, B S Ishkhanov, E L Isupov, M M Ito, D Jenkins, H S Jo, J R Johnstone, K Joo, H G Juengst, N Kalantarians, J D Kellie, M Khandaker, W Kim, A Klein, F J Klein, A V Klimenko, M Kossov, Z Krahn, L H Kramer, V Kubarovsky, J Kuhn, S E Kuhn, S V Kuleshov, J Lachniet, J M Laget, J Langheinrich, D Lawrence, Ji Li, K Livingston, H Y Lu, M Maccormick, N Markov, P Mattione, S McAleer, B McKinnon, J W C McNabb, B A Mecking, S Mehrabyan, J J Melone, M D Mestayer, C A Meyer, T Mibe, K Mikhailov, R Minehart, M Mirazita, R Miskimen, V Mokeev, K Moriya, S A Morrow, M Moteabbed, J Mueller, E Munevar, G S Mutchler, P Nadel-Turonski, S Niccolai, G Niculescu, I Niculescu, B B Niczyporuk, M R Niroula, R A Niyazov, M Nozar, M Osipenko, A I Ostrovidov, K Park, E Pasyuk, C Paterson, S Anefalos Pereira, J Pierce, N Pivnyuk, D Pocanic, O Pogorelko, S Pozdniakov, B M Preedom, J W Price, Y Prok, D Protopopescu, B A Raue, G Riccardi, G Ricco, M Ripani, B G Ritchie, F Ronchetti, G Rosner, P Rossi, F Sabatié, J Salamanca, C Salgado, J P Santoro, V Sapunenko, R A Schumacher, V S Serov, Y G Sharabian, D Sharov, N V Shvedunov, E S Smith, L C Smith, D I Sober, D Sokhan, A Stavinsky, S S Stepanyan, S Stepanyan, B E Stokes, P Stoler, I I Strakovsky, S Strauch, M Taiuti, D J Tedeschi, A Tkabladze, S Tkachenko, L Todor, M Ungaro, M F Vineyard, A V Vlassov, D P Watts, L B Weinstein, M Williams, E Wolin, A Yegneswaran, L Zana, B Zhang, J Zhang, B Zhao, Z W Zhao; CLAS Collaboration
Affiliations

Search for medium modifications of the rho meson

R Nasseripour et al. Phys Rev Lett. .

Abstract

The photoproduction of vector mesons on various nuclei has been studied using the CLAS detector at Jefferson Laboratory. The vector mesons, rho, omega, and varphi, are observed via their decay to e;{+}e;{-}, in order to reduce the effects of final-state interactions in the nucleus. Of particular interest are possible in-medium effects on the properties of the rho meson. The rho mass spectrum is extracted from the data on various nuclei, 2H, C, Fe, and Ti. We observe no significant mass shift and some broadening consistent with expected collisional broadening for the rho meson.

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