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Measurement of neutral current e±p cross sections at high Bjorken x with the ZEUS detector

Physical Review D American Physical Society (APS) 89:7 (2014) 072007

Authors:

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 Kotański, 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 Perlański, H Perrey, NS Pokrovskiy, AS Proskuryakov, M Przybycień, 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 Shevchenko, O Shkola, I Singh, IO Skillicorn, W Słomiński, 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
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Photoproduction of isolated photons, inclusively and with a jet, at HERA

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 730 (2014) 293-301

Authors:

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, YA 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, I Korol, IA Korzhavina, A Kotański, 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, OY Lukina, J Maeda, I Makarenko, J Malka

Abstract:

The photoproduction of isolated photons, both inclusive and together with a jet, has been measured with the ZEUS detector at HERA using an integrated luminosity of 374 pb-1. Differential cross sections are presented in the isolated-photon transverse-energy and pseudorapidity ranges 6
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Erratum: Measurement of D*± production in deep inelastic scattering at HERA

Journal of High Energy Physics Springer Nature 2014:2 (2014) 106

Authors:

The ZEUS collaboration, H Abramowicz, I Abt, L Adamczyk, M Adamus, R Aggarwal, S Antonelli, P Antonioli, A Antonov, M Arneodo, O Arslan, V Aushev, Y Aushev, O Bachynska, A Bamberger, AN Barakbaev, G Barbagli, G Bari, F Barreiro, N Bartosik, D Bartsch, M Basile, O Behnke, J Behr, U Behrens, L Bellagamba, A Bertolin, S Bhadra, M Bindi, C Blohm, V Bokhonov, T Bold, EG Boos, K Borras, D Boscherini, D Bot, I Brock, E Brownson, R Brugnera, N Brümmer, A Bruni, G Bruni, B Brzozowska, PJ Bussey, B Bylsma, A Caldwell, M Capua, R Carlin, CD Catterall, S Chekanov, J Chwastowski, J Ciborowski, R Ciesielski, L Cifarelli, F Cindolo, A Contin, AM Cooper-Sarkar, N Coppola, M Corradi, F Corriveau, M Costa, G D’Agostini, F Dal Corso, J del Peso, RK Dementiev, S De Pasquale, M Derrick, RCE Devenish, D Dobur, BA Dolgoshein, G Dolinska, AT Doyle, V Drugakov, LS Durkin, S Dusini, Y Eisenberg, PF Ermolov, A Eskreys, S Fang, S Fazio, J Ferrando, MI Ferrero, J Figiel, B Foster, G Gach, A Galas, E Gallo, A Garfagnini, A Geiser, I Gialas, A Gizhko, LK Gladilin, D Gladkov, C Glasman, O Gogota, Yu A Golubkov, P Göttlicher, I Grabowska-Bold, J Grebenyuk, I Gregor, G Grigorescu, G Grzelak, O Gueta, M Guzik, C Gwenlan, T Haas, W Hain, R Hamatsu, JC Hart, H Hartmann, G Hartner, E Hilger, D Hochman, R Hori, A Hüttmann, ZA Ibrahim, Y Iga, R Ingbir, M Ishitsuka, A Iudin, H-P Jakob, F Januschek, TW Jones, M Jüngst, I Kadenko, B Kahle, S Kananov, T Kanno, U Karshon, F Karstens, II Katkov, M Kaur, P Kaur, A Keramidas, LA Khein, JY Kim, D Kisielewska, S Kitamura, R Klanner, U Klein, E Koffeman, N Kondrashova, O Kononenko, P Kooijman, Ie Korol, IA Korzhavina, A Kotanski, U Kötz, N Kovalchuk, H Kowalski, O Kuprash, M Kuze, A Lee, BB Levchenko, A Levy, V Libov, S Limentani, TY Ling, M Lisovyi, E Lobodzinska, W Lohmann, B Löhr, E Lohrmann, KR Long, A Longhin, D Lontkovskyi, O Yu Lukina, J Maeda, S Magill, I Makarenko, J Malka, R Mankel, A Margotti, G Marini, JF Martin, A Mastroberardino, MCK Mattingly, I-A Melzer-Pellmann, S Mergelmeyer, S Miglioranzi, F Mohamad Idris, V Monaco, A Montanari, JD Morris, K Mujkic, B Musgrave, K Nagano, T Namsoo, R Nania, A Nigro, Y Ning, T Nobe, D Notz, RJ Nowak, AE Nuncio-Quiroz, BY Oh, N Okazaki, K Olkiewicz, Yu Onishchuk, K Papageorgiu, A Parenti, E Paul, JM Pawlak, B Pawlik, PG Pelfer, A Pellegrino, W Perlanski, H Perrey, K Piotrzkowski, P Plucinski, NS Pokrovskiy, A Polini, AS Proskuryakov, M Przybycien, A Raval, DD Reeder, B Reisert, Z Ren, J Repond, YD Ri, A Robertson, P Roloff, I Rubinsky, M Ruspa, R Sacchi, U Samson, G Sartorelli, AA Savin, DH Saxon, M Schioppa, S Schlenstedt, P Schleper, WB Schmidke, U Schneekloth, V Schönberg, T Schörner-Sadenius, J Schwartz, F Sciulli, LM Shcheglova, R Shehzadi, S Shimizu, I Singh, IO Skillicorn, W Slominski, WH Smith, V Sola, A Solano, D Son, V Sosnovtsev, A Spiridonov, H Stadie, L Stanco, N Stefaniuk, A Stern, TP Stewart, A Stifutkin, P Stopa, S Suchkov, G Susinno, L Suszycki, J Sztuk-Dambietz, D Szuba, J Szuba, AD Tapper, E Tassi, J Terrón, T Theedt, H Tiecke, K Tokushuku, J Tomaszewska, A Trofymov, V Trusov, T Tsurugai, M Turcato, O Turkot, T Tymieniecka, C Uribe-Estrada, M Vázquez, A Verbytskyi, O Viazlo, NN Vlasov, R Walczak, WAT Wan Abdullah, JJ Whitmore, K Wichmann, L Wiggers, M Wing, M Wlasenko, G Wolf, H Wolfe, K Wrona, AG Yagües-Molina, S Yamada, Y Yamazaki, R Yoshida, C Youngman, N Zakharchuk, AF Żarnecki, L Zawiejski, O Zenaiev, W Zeuner, BO Zhautykov, N Zhmak, A Zichichi, Z Zolkapli, DS Zotkin
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Big-bang nucleosynthesis

Chinese Physics C IOP Publishing 38:9 (2014) 090001

Authors:

BD Fields, P Molaro, Subir Sarkar

Abstract:

A critical review is given of the current status of cosmological nucleosynthesis. In the framework of the Standard Model with 3 types of relativistic neutrinos, the baryon-to-photon ratio, $\eta$, corresponding to the inferred primordial abundances of deuterium and helium-4 is consistent with the independent determination of $\eta$ from observations of anisotropies in the cosmic microwave background. However the primordial abundance of lithium-7 inferred from observations is significantly below its expected value. Taking systematic uncertainties in the abundance estimates into account, there is overall concordance in the range $\eta = (5.7-6.7)\times 10^{-10}$ at 95% CL (corresponding to a cosmological baryon density $\Omega_B h^2 = 0.021 - 0.025$). The D and He-4 abundances, when combined with the CMB determination of $\eta$, provide the bound $N_\nu=3.28 \pm 0.28$ on the effective number of neutrino species. Other constraints on new physics are discussed briefly.
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Measurement of beauty and charm production in deep inelastic scattering at HERA and measurement of the beauty-quark mass

Journal of High Energy Physics 2014:9 (2014) 1-56

Authors:

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, YA 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, I 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, OY Lukina, J Maeda, I Makarenko, J Malka

Abstract:

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 GeV2using 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, mbat 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.
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