Scaled momentum distributions of charged particles in dijet photoproduction at HERA
Journal of High Energy Physics 2009:8 (2009)
Authors:
O Behnke, J Behr, U Behrens, C Blohm, K Borras, D Bot, R Ciesielski, N Coppola, S Fang, A Geiser, P G枚lttlicher, J Grebenyuk, I Gregor, T Haas, W Hain, A H眉ttmann, F Januschek, B Kahle, II Katkov, U Klein, U K枚tz, H Kowalski, M Lisovyi, E Lobodzinska, B L枚hr, R Mankel, IA Melzer-Pellmann, S Miglioranzi, A Montanari, T Namsoo, D Notz, A Parenti, P Roloff, I Rubinsky, U Schneekloth, A Spiridonov, D Szuba, J Szuba, T Theedt, J Tomaszewska, G Wolf, K Wrona, AG Yag眉es-Molina, C Youngman, W Zeuner, S Chekanov, M Derrick, S Magill, B Musgrave, D Nicholass, J Repond, R Yoshida, MCK Mattingly, P Antonioli, G Bari, L Bellagamba, D Boscherini, A Bruni, G Bruni, F Cindolo, M Corradi, G Iacobucci, A Margotti, R Nania, A Polini, S Antonelli, M Basile, M Bindi, L Cifarelli, A Contin, S De Pasquale, G Sartorelli, A Zichichi, D Bartsch, I Brock, H Hartmann, E Hilger, HP Jakob, M J眉ngst, AE Nuncio-Quiroz, E Paul, U Samson, V Sch枚nberg, R Shehzadi, M Wlasenko, NH Brook, GP Heath, JD Morris, M Kaur, P Kaur, I Singh, M Capua, S Fazio, A Mastroberardino, M Schioppa, G Susinno, E Tassi, JY Kim, ZA Ibrahim, F Mohamad Idris
Abstract:
The scaled momentum distributions of charged particles in jets have been measured for dijet photoproduction with the ZEUS detector at HERA using an integrated luminosity of 359 pb-1. The distributions are compared to predictions based on perturbative QCD carried out in the framework of the modified leading-logarithmic approximation (MLLA) and assuming local parton-hadron duality (LPHD). The universal MLLA scale, 螞eff, and the LPHD parameter, 魏ch, are extracted. 漏 SISSA 2009.