Accès ouvert déclaré
2014
preprint
Measurement of the forward charged particle pseudorapidity density in pp collisions at sqrt(s) = 8 TeV using a displaced interaction point
The TOTEM Collaboration, G. Antchev, P. Aspell, Ivan Atanassov, V. Avati, Joachim Baechler, V. Berardi, M. Berretti, E. Bossini, U. Bottigli, M. Bozzo, E. Brücken, A. Buzzo, Francesco Saverio Cafagna, M.G. Catanesi, Corbin E. Covault, M. Csanád, T. Csörgő, M. Deile, M. Doubek, K. Eggert, V. Eremin, F. Ferro, A. Fiergolski, F. García, V. Georgiev, S. Gianì, L. Grzanka, J. Hammerbauer, J. Heino, T. E. Hilden, A. Karev, J. Kašpar, J. Kopal, V. Kundrát, S. Lami, G. Latino, T. Leszko, É. Lippmaa, J. Lippmaa, M. V. Lokajíček, Liliana Losurdo, M. Lo Vetere, F. Lucas Rodríguez, M. M. Macri, T. Mäki, A. Mercadante, N. Minafra, S. Minutoli, Frigyes Janos Nemes, H. Niewiadomski, Eraldo Oliveri, F. Oljemark, R. Orava, M. Oriunno, K. Österberg, PAOLO PALAZZI, Z. Peroutka, J Procházka, Michele Arcangelo Quinto, E. Radermacher, E. Radicioni, F. Ravotti, Enrico Robutti, Leszek Ropelewski, Gennaro Ruggiero, H. Saarikko, Angelo Scribano, J. Smajek, W. Snoeys, J. Sziklai, Cyrus C. Taylor, NICOLA TURINI, V. Vacek, J. Welti, J.J. Whitmore, Przemysław Wyszkowski, Krzysztof Zieliński
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Le résumé fourni par la source
The pseudorapidity density of charged particles dN(ch)/deta is measured by the TOTEM experiment in pp collisions at sqrt(s) = 8 TeV within the range 3.9 < eta < 4.7 and -6.95 < eta < -6.9. Data were collected in a low intensity LHC run with collisions occurring at a distance of 11.25 m from the nominal interaction point. The data sample is expected to include 96-97\% of the inelastic proton-proton interactions. The measurement reported here considers charged particles with p_T > 0 MeV/c, produced in inelastic interactions with at least one charged particle in -7 < eta < -6 or 3.7 < eta <4.8 . The dN(ch)/deta has been found to decrease with |eta|, from 5.11 +- 0.73 at eta = 3.95 to 1.81 +- 0.56 at eta= - 6.925. Several MC generators are compared to the data and are found to be within the systematic uncertainty of the measurement.
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Les sujets associés
High-Energy Particle Collisions ResearchParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle Interactions