Scaled momentum spectra in deep inelastic scattering at HERA

Charged particle production has been studied in neutral current deep inelastic ep scattering with the ZEUS detector at HERA using an integrated luminosity of 0.44 fb −1 . Distributions of scaled momenta in the Breit frame are presented for particles in the current fragmentation region. The evolution...

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Veröffentlicht in:	The journal of high energy physics 2010-06, Vol.2010 (6), Article 9
Hauptverfasser:	Abramowicz, H., Antonioli, P., Aushev, V., Aushev, Y., Bachynska, O., Barbagli, G., Bari, G., Basile, M., Blohm, C., Boos, E. G., Boutle, S. K., Brümmer, N., Brzozowska, B., Butterworth, J. M., Capua, M., Carlin, R., Chekanov, S., Cifarelli, L., Costa, M., Dal Corso, F., Dobur, D., Ermolov, P. F., Eskreys, A., Fang, S., Fazio, S., Figiel, J., Gallo, E., Garfagnini, A., Gladilin, L. K., Gogota, O., Golubkov, Yu. A., Grzelak, G., Hain, W., Hartner, G., Hori, R., Horton, K., Iga, Y., Januschek, F., Jones, T. W., Kananov, S., Kanno, T., Kaur, P., Kim, J. Y., Kisielewska, D., Kitamura, S., Klanner, R., Korol, Ie, Kowalski, H., Kulinski, P., Kuze, M., Lee, A., Levchenko, B. B., Libov, V., Lohmann, W., Löhr, B., Loizides, J. H., Long, K. R., Margotti, A., Morris, J. D., Musgrave, B., Nigro, A., Ning, Y., Notz, D., Oh, B. Y., Olkiewicz, K., Pawlak, J. M., Pelfer, P. G., Perlanski, W., Polini, A., Reeder, D. D., Ren, Z., Ri, Y. D., Robertson, A., Roloff, P., Ron, E., Rubinsky, I., Savin, A. A., Schleper, P., Schönberg, V., Schwartz, J., Shcheglova, L. M., Singh, I., Skillicorn, I. O., Smith, W. H., Solomin, A., Stanco, L., Stern, A., Stewart, T.P., Szuba, D., Szuba, J., Tapper, A. D., Tomalak, O., Tsurugai, T., Viazlo, V., Wan Abdullah, W. A. T., Whitmore, J. J., Wrona, K., Youngman, C., Zhou, C., Zotkin, D. S.
Format:	Artikel
Sprache:	eng
Schlagworte:	Charged particles Classical and Quantum Gravitation Computer simulation Elementary Particles Fragmentation High energy physics Inelastic scattering Luminosity Neutral currents Particle production Physics Physics and Astronomy Quantum Field Theories Quantum Field Theory Quantum Physics Relativity Theory String Theory
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Beschreibung
Zusammenfassung:	Charged particle production has been studied in neutral current deep inelastic ep scattering with the ZEUS detector at HERA using an integrated luminosity of 0.44 fb −1 . Distributions of scaled momenta in the Breit frame are presented for particles in the current fragmentation region. The evolution of these spectra with the photon virtuality, Q 2 , is described in the kinematic region 10 < Q 2 < 41000Ge V 2 . Next-to-leading-order and modified leading-log-approximation QCD calculations as well as predictions from Monte Carlo models are compared to the data. The results are also compared to e + e − annihilation data. The dependences of the pseudorapidity distribution of the particles on Q 2 and on the energy in the γ p system, W , are presented and interpreted in the context of the hypothesis of limiting fragmentation.
ISSN:	1029-8479 1029-8479
DOI:	10.1007/JHEP06(2010)009