Measurement of beauty and charm production in deep inelastic scattering at HERA and measurement of the beauty-quark mass
Journal of High Energy Physics Springer Nature 2014:9 (2014) 127
Authors:
The ZEUS collaboration, H Abramowicz, I Abt, L Adamczyk, M Adamus, R Aggarwal, S Antonelli, O Arslan, V Aushev, Y Aushev, O Bachynska, AN Barakbaev, N Bartosik, O Behnke, J Behr, U Behrens, A Bertolin, S Bhadra, I Bloch, V Bokhonov, EG Boos, K Borras, I Brock, R Brugnera, A Bruni, B Brzozowska, PJ Bussey, A Caldwell, M Capua, CD Catterall, J Chwastowski, J Ciborowski, R Ciesielski, AM Cooper-Sarkar, M Corradi, F Corriveau, G D’Agostini, RK Dementiev, RCE Devenish, G Dolinska, V Drugakov, S Dusini, J Ferrando, J Figiel, B Foster, G Gach, A Garfagnini, A Geiser, A Gizhko, LK Gladilin, O Gogota, Yu A Golubkov, J Grebenyuk, I Gregor, G Grzelak, O Gueta, M Guzik, W Hain, G Hartner, D Hochman, R Hori, ZA Ibrahim, Y Iga, M Ishitsuka, A Iudin, F Januschek, I Kadenko, S Kananov, T Kanno, U Karshon, M Kaur, P Kaur, LA Khein, D Kisielewska, R Klanner, U Klein, N Kondrashova, O Kononenko, Ie Korol, IA Korzhavina, A Kotanski, U Kötz, N Kovalchuk, H Kowalski, O Kuprash, M Kuze, BB Levchenko, A Levy, V Libov, S Limentani, M Lisovyi, E Lobodzinska, W Lohmann, B Löhr, E Lohrmann, A Longhin, D Lontkovskyi, O Yu Lukina, J Maeda, I Makarenko, J Malka, JF Martin, S Mergelmeyer, F Mohamad Idris, K Mujkic, V Myronenko, K Nagano, A Nigro, T Nobe, D Notz, RJ Nowak, K Olkiewicz, Yu Onishchuk, E Paul, W Perlanski, H Perrey, NS Pokrovskiy, AS Proskuryakov, M Przybycien, A Raval, P Roloff, I Rubinsky, M Ruspa, V Samojlov, DH Saxon, M Schioppa, WB Schmidke, U Schneekloth, T Schörner-Sadenius, J Schwartz, LM Shcheglova, R Shehzadi, R Shevchenko, O Shkola, I Singh, IO Skillicorn, W Slominski, V Sola, A Solano, A Spiridonov, L Stanco, N Stefaniuk, A Stern, TP Stewart, P Stopa, J Sztuk-Dambietz, D Szuba, J Szuba, E Tassi, T Temiraliev, K Tokushuku, J Tomaszewska, A Trofymov, V Trusov, T Tsurugai, M Turcato, O Turkot, T Tymieniecka, A Verbytskyi, O Viazlo, R Walczak, WAT Wan Abdullah, K Wichmann, M Wing, G Wolf, S Yamada, Y Yamazaki, N Zakharchuk, AF Żarnecki, L Zawiejski, O Zenaiev, BO Zhautykov, N Zhmak, DS Zotkin
Abstract:
The production of beauty and charm quarks in ep interactions has been studied with the ZEUS detector at HERA for exchanged four-momentum squared 5 < Q2< 1000 GeV2 using an integrated luminosity of 354 pb−1. The beauty and charm content in events with at least one jet have been extracted using the invariant mass of charged tracks associated with secondary vertices and the decay-length significance of these vertices. Differential cross sections as a function of Q2, Bjorken x, jet trans- verse energy and pseudorapidity were measured and compared with next-to-leading-order QCD calculations. The beauty and charm contributions to the proton structure functions were extracted from the double-differential cross section as a function of x and Q2. The running beauty-quark mass, mb at the scale mb, was determined from a QCD fit at next-to-leading order to HERA data for the first time and found to be mb(mb) = 4.07 ± 0.14 (fit)− 0.07+ 0.01(mod.)− 0.00+ 0.05(param.)− 0.05+ 0.08(theo.) GeV.
