Evidence for non-exponential elastic proton proton differential cross-section at low vertical bar t vertical bar and root s=8 TeV by TOTEM

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http://hdl.handle.net/10138/159033

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Antchev , G , Garcia , F , Heino , J , Lauhakangas , R , Naaranoja , T , Oljemark , F , Orava , R , Österberg , K , Saarikko , H , Welti , J & TOTEM Collaboration 2015 , ' Evidence for non-exponential elastic proton proton differential cross-section at low vertical bar t vertical bar and root s=8 TeV by TOTEM ' Nuclear Physics, Section B , vol. 899 , pp. 527-546 . DOI: 10.1016/j.nuclphysb.2015.08.010

Julkaisun nimi: Evidence for non-exponential elastic proton proton differential cross-section at low vertical bar t vertical bar and root s=8 TeV by TOTEM
Tekijä: Antchev, G.; Aspell, P.; Atanassov, I.; Avati, V.; Baechler, J.; Berardi, V.; Berretti, M.; Bossini, E.; Bottigli, U.; Bozzo, M.; Broulim, P.; Buzzo, A.; Cafagna, F. S.; Campanella, C. E.; Catanesi, M. G.; Csanad, M.; Csoergo, T.; Deile, M.; De Leonardis, F.; D'Orazio, A.; Doubek, M.; Eggert, K.; Eremin, V.; Ferro, F.; Fiergolski, A.; Garcia, F.; Georgiev, V.; Giani, S.; Grzanka, L.; Guaragnella, C.; Hammerbauer, J.; Heino, J.; Karev, A.; Kaspar, J.; Kopal, J.; Kundrat, V.; Lami, S.; Latino, G.; Lauhakangas, R.; Linhart, R.; Lippmaa, E.; Lippmaa, J.; Lokajicek, M. V.; Losurdo, L.; Lo Vetere, M.; Lucas Rodriguez, F.; Macri, M.; Mercadante, A.; Minafra, N.; Minutoli, S.; Naaranoja, T.; Nemes, F.; Niewiadomski, H.; Oliveri, E.; Oljemark, F.; Orava, R.; Oriunno, M.; Österberg, K.; Palazzi, P.; Palocko, L.; Passaro, V.; Peroutka, Z.; Petruzzelli, V.; Politi, T.; Prochazka, J.; Prudenzano, F.; Quinto, M.; Radermacher, E.; Radicioni, E.; Ravotti, F.; Robutti, E.; Ropelewski, L.; Ruggiero, G.; Saarikko, H.; Scribano, A.; Smajek, J.; Snoeys, W.; Sodzawiczny, T.; Sziklai, J.; Taylor, C.; Turini, N.; Vacek, V.; Welti, J.; Wyszkowski, P.; Zielinski, K.
Muu tekijä: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Doc­toral Pro­gramme in At­mo­spheric Sci­ences
University of Helsinki, Helsinki Institute of Physics
Päiväys: 2015-10
Kieli: eng
Sivumäärä: 20
Kuuluu julkaisusarjaan: Nuclear Physics, Section B
ISSN: 0550-3213
URI: http://hdl.handle.net/10138/159033
Tiivistelmä: The TOTEM experiment has made a precise measurement of the elastic proton proton differential cross-section at the centre-of-mass energy root s = 8 TeV based on a high-statistics data sample obtained with the beta* = 90 m optics. Both the statistical and systematic uncertainties remain below 1%, except for the t-independent contribution from the overall normalisation. This unprecedented precision allows to exclude a purely exponential differential cross-section in the range of four-momentum transfer squared 0.027 <vertical bar t vertical bar <0.2 GeV2 with a significance greater than 7 sigma. Two extended parametrisations, with quadratic and cubic polynomials in the exponent, are shown to be well compatible with the data. Using them for the differential cross-section extrapolation to t = 0, and further applying the optical theorem, yields total cross-section estimates of (101.5 +/- 2.1) mb and (101.9 +/- 2.1) mb, respectively, in agreement with previous TOTEM measurements. (C) 2015 The Authors. Published by Elsevier B.V.
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