Measurement of heavy-quark jet photoproduction at HERA

Photoproduction of beauty and charm quarks in events with at least two jets has been measured with the ZEUS detector at HERA using an integrated luminosity of 133 pb −1 . The fractions of jets containing b and c quarks were extracted using the invariant mass of charged tracks associated with seconda...

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Veröffentlicht in:	The European physical journal. C, Particles and fields Particles and fields, 2011-05, Vol.71 (5), p.1-16, Article 1659
Hauptverfasser:	Abramowicz, H., Aggarwal, R., Antonov, A., Bachynska, O., Barbagli, G., Bellagamba, L., Bindi, M., Blohm, C., Bołd, T., Bondarenko, K., Brümmer, N., Bruni, G., Bussey, P. J., Chekanov, S., Chwastowski, J., Contin, A., Cooper-Sarkar, A. M., Dal Corso, F., del Peso, J., Dementiev, R. K., Derrick, M., Dobur, D., Dusini, S., Eisenberg, Y., Fang, S., Ferrando, J., Gach, G., Gallo, E., Gialas, I., Gladkov, D., Gogota, O., Grebenyuk, J., Gregor, I., Gwenlan, C., Hartner, G., Ibrahim, Z. A., Ingbir, R., Jakob, H.-P., Januschek, F., Kadenko, I., Karstens, F., Kaur, M., Kim, J. Y., Kisielewska, D., Kitamura, S., Klein, U., Korol, I., Kotański, A., Kowalski, H., Libov, V., Lontkovskyi, D., Lukina, O. Yu, Magill, S., Malka, J., Martin, J. F., Mergelmeyer, S., Miglioranzi, S., Idris, F. Mohamad, Morris, J. D., Nigro, A., Notz, D., Nowak, R. J., Nuncio-Quiroz, A. E., Olkiewicz, K., Onishchuk, Yu, Papageorgiu, K., Paul, E., Perrey, H., Piotrzkowski, K., Przybycień, M., Raval, A., Roloff, P., Rubinsky, I., Sartorelli, G., Saxon, D. H., Schioppa, M., Schönberg, V., Shimizu, S., Smith, W. H., Stern, A., Szuba, D., Szuba, J., Tapper, A. D., Terrón, J., Tokushuku, K., Tomalak, O., Tsurugai, T., Turcato, M., Vázquez, M., Verbytskyi, A., Viazlo, O., Wiggers, L., Wolfe, H., Wrona, K., Yamada, S., Yoshida, R., Zawiejski, L., Zeuner, W., Zhmak, N., Zulkapli, Z.
Format:	Artikel
Sprache:	eng
Schlagworte:	Apexes Astronomy Astrophysics and Cosmology Charging Charm (particle physics) Cross sections Decay Detectors Elementary Particles Exact sciences and technology Hadrons Heavy Ions Invariants Jets Lead (metal) Luminosity Measurement Measurement Science and Instrumentation Nuclear Energy Nuclear Physics Photoproduction Physics Physics and Astronomy Production processes Quantum Field Theories Quantum Field Theory Quarks Regular Article - Experimental Physics String Theory The physics of elementary particles and fields Transverse momentum
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Beschreibung
Zusammenfassung:	Photoproduction of beauty and charm quarks in events with at least two jets has been measured with the ZEUS detector at HERA using an integrated luminosity of 133 pb −1 . The fractions of jets containing b and c quarks were 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 jet transverse momentum, , and pseudorapidity, η jet , were measured. The data are compared with previous measurements and are well described by next-to-leading-order QCD predictions.
ISSN:	1434-6044 1434-6052
DOI:	10.1140/epjc/s10052-011-1659-5