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Antchev, G.; Aspell, P.; Atanassov, I.; Avati, V.; Baechler, J.; Barrera, C. Baldenegro; Berardi, V.; Berretti, M.; Bossini, E.; Bottigli, U.; Bozzo, M.; Burkhardt, H.; Cafagna, F. S.; Catanesi, M. G.; Csanád, M.; Csörgő, T.; Deile, M.; De Leonardis, F.; Doubek, M.; Druzhkin, D.; Eggert, K.; Eremin, V.; Ferro, F.; Fiergolski, A.; Garcia, F.; Georgiev, V.; Giani, S.; Grzanka, L.; Hammerbauer, J.; Ivanchenko, V.; Kašpar, J.; Kopal, J.; Kundrát, V.; Lami, S.; Latino, G.; Lauhakangas, R.; Lindsey, C.; Lokajíček, M. V.; Losurdo, L.; Vetere, M. Lo; Rodríguez, F. Lucas; Macrí, M.; Malawski, M.; Minafra, N.; Minutoli, S.; Naaranoja, T.; Nemes, F.; Niewiadomski, H.; Novák, T.; Oliveri, E.; Oljemark, F.; Oriunno, M.; Österberg, K.; Palazzi, P.; Passaro, V.; Peroutka, Z.; Procházka, J.; Quinto, M.; Radermacher, E.; Radicioni, E.; Ravotti, F.; Robutti, E.; Royon, C.; Ruggiero, G.; Saarikko, H.; Scribano, A.; Smajek, J.; Snoeys, W.; Sziklai, J.; Taylor, C.; Tcherniaev, E.; Turini, N.; Vacek, V.; Welti, J.; Williams, J.; Ciesielski, R.
The European physical journal. C, Particles and fields, 10/2019, Letnik: 79, Številka: 10Journal Article
The TOTEM collaboration has measured the elastic proton-proton differential cross section d σ / d t at s = 13 TeV LHC energy using dedicated β ∗ = 90 m beam optics. The Roman Pot detectors were inserted to 10 σ distance from the LHC beam, which allowed the measurement of the range 0.04 GeV 2 ; 4 GeV 2 in four-momentum transfer squared | t |. The efficient data acquisition allowed to collect about 10 9 elastic events to precisely measure the differential cross-section including the diffractive minimum (dip), the subsequent maximum (bump) and the large-| t | tail. The average nuclear slope has been found to be B = ( 20.40 ± 0 . 002 stat ± 0 . 01 syst ) GeV - 2 in the | t |-range 0.04–0.2 GeV 2 . The dip position is | t dip | = ( 0.47 ± 0 . 004 stat ± 0 . 01 syst ) GeV 2 . The differential cross section ratio at the bump vs. at the dip R = 1.77 ± 0 . 01 stat has been measured with high precision. The series of TOTEM elastic pp measurements show that the dip is a permanent feature of the pp differential cross-section at the TeV scale.
