Journal Article

Measurement of the inclusive e±p scattering cross section at high inelasticity y and of the structure function FL

Contreras, J. G., Gayler, J., Loktionova, N., Raicevic, N., Robmann, P., Tsurin, I., Barrelet, E., Bizot, J. C., Brisson, V., Truöl, P., Diaconu, C., Cholewa, A., Urban, K., Ravdandorj, T., Lipka, K., Rusakov, S., Belousov, A., Delvax, J., Polifka, R., Turnau, J., Marage, P., Stoicea, G., Horisberger, R., Meyer, A. B., Fedotov, A., Alexa, C., Schoeffel, L., Kutak, K., Campbell, A. J., Steder, M., Wünsch, E., Makankine, A., Kapichine, M., Patel, G. D., Kostka, P., Behrend, O., Zálešák, J., Bylinkin, A., Papadopoulou, Th, Povh, B., Zomer, F., Osman, S., Schöning, A., Britzger, D., Grell, B. R., Jung, H., Felst, R., Schultz-Coulon, H.-C., Newman, P. R., Vargas, A., Cvach, J., Eckerlin, G., Cerny, K., Perez, E., Staykova, Z., Gouzevitch, M., Egli, S., Kleinwort, C., Delcourt, B., Nowak, G., Zhokin, A., Eliseev, A., Ozerov, D., Tran, T. H., Wegener, D., Toll, T., List, J., Habib, S., Henschel, H., Kraemer, M., Mikocki, S., Kretzschmar, J., Hiller, K. H., Sefkow, F., Pascaud, C., Bystritskaya, L., Bruncko, D., Levonian, S., Gogitidze, N., Rizvi, E., Haidt, D., Niebuhr, C., Sankey, D. P. C., Dodonov, V., Martyn, H.-U., Hreus, T., Fischer, D.-J., Mudrinic, M., Speck

2011

Overview

A measurement is presented of the inclusive neutral current e ± p scattering cross section using data collected by the H1 experiment at HERA during the years 2003 to 2007 with proton beam energies E p of 920, 575, and 460 GeV. The kinematic range of the measurement covers low absolute four-momentum transfers squared, 1.5 GeV 2 < Q 2 <120 GeV 2 , small values of Bjorken x , 2.9⋅10 −5 < x <0.01, and extends to high inelasticity up to y =0.85. The structure function F L is measured by combining the new results with previously published H1 data at E p =920 GeV and E p =820 GeV. The new measurements are used to test several phenomenological and QCD models applicable in this low Q 2 and low x kinematic domain.

• Publisher: Springer-Verlag,Springer
• Subject: Astronomy / Astrophysics and Cosmology / Elementary Particles / Exact sciences and technology / Hadrons / Heavy Ions / Measurement Science and Instrumentation / Nuclear Energy / Nuclear Physics / Physics / Physics and Astronomy / Quantum Field Theories / Quantum Field Theory / Regular Article - Experimental Physics / String Theory / The physics of elementary particles and fields