Measurement of charm and beauty production in deep inelastic ep scattering from decays into muons at HERA

• Published in: The European physical journal. C, Particles and fields Vol. 65; no. 1-2; pp. 65 - 79
• Main Authors: Magill, S., Musgrave, B., Yoshida, R., Antonioli, P., Bellagamba, L., Cindolo, F., Polini, A., Basile, M., Zichichi, A., Jakob, H.-P., Paul, E., Schönberg, V., Brook, N. H., Heath, G. P., Fazio, S., Schioppa, M., Ibrahim, Z. A., Sciulli, F., Eskreys, A., Olkiewicz, K., Suszycki, L., Behr, J., Blohm, C., Fang, S., Gregor, I., Hain, W., Klein, U., Melzer-Pellmann, I.-A., Miglioranzi, S., Namsoo, T., Notz, D., Youngman, C., Lohmann, W., Gallo, E., Bamberger, A., Dobur, D., Bussey, P. J., Papageorgiu, K., Schörner-Sadenius, T., Turcato, M., Fry, C., Long, K. R., Tapper, A. D., Aushev, V., Kuprash, O., Lontkovskyi, D., Sorokin, Iu, Volynets, O., de Favereau, J., Jimenez, M., del Peso, J., Schwartz, J., Zhou, C., Tsurugai, T., Dolgoshein, B. A., Dementiev, R. K., Gladilin, L. K., Golubkov, Yu. A., Khein, L. A., Zotkin, D. S., Abt, I., Caldwell, A., Grigorescu, G., Koffeman, E., Pellegrino, A., Vázquez, M., Durkin, L. S., Lee, A., Allfrey, P. D., Horton, K., Walczak, R., Dusini, S., Longhin, A., Stanco, L., Brugnera, R., Garfagnini, A., Raval, A., Iga, Y., Marini, G., Hart, J. C., Levy, A., Maeda, J., Kagawa, S., Tawara, T., Hamatsu, R., Kaji, H., Ota, O., Ferrero, M. I., Sola, V., Arneodo, M., Boutle, S. K., Jones, T. W., Malka, J., Eisenberg, Y., Brownson, E., Reeder, D. D., Smith, W. H., Bhadra, S., Noor, U., Standage, J.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 2010; Springer; Springer Nature B.V
• Subjects: Astronomy; Astrophysics and Cosmology; Charm (particle physics); Cross sections; Decay; Detectors; Elementary Particles; Exact sciences and technology; Hadrons; Heavy Ions; Inelastic scattering; Lead (metal); Luminosity; Measurement; Measurement Science and Instrumentation; Muons; Nuclear Energy; Nuclear Physics; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quarks; Regular Article - Experimental Physics; String Theory; The physics of elementary particles and fields; Parton Density Function; Monte Carlo; Proton Structure Function; Deep Inelastic Scattering; ZEUS Collaboration; Protons; Electron-proton scattering; Charm particles; Inelastic scattering; Differential cross sections; Elementary particles; Muon decay; Structure functions; Luminosity; Mathematical physics; Quantum chromodynamics; Muons
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-009-1193-x

The production of charm and beauty quarks in
ep
interactions has been measured with the ZEUS detector at HERA for squared four-momentum exchange
Q
2
>20 GeV
2
, using an integrated luminosity of 126 pb
−1
. Charm and beauty quarks were identified through their decays into muons. Differential cross sections were measured for muon transverse momenta
and pseudorapidities −1.6<
η
μ
<2.3, as a function of
,
η
μ
,
Q
2
and Bjorken
x
. The charm and beauty contributions to the proton structure function
F
2
were also extracted. The results agree with previous measurements based on independent techniques and are well described by QCD predictions.