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 10σ distance from the LHC beam, which allowed the measurement of the range [0.04 GeV2; 4 GeV2] in four-momentum transfer squared |t|. The efficient data acquisition allowed to collect about 109 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±0.002stat±0.01syst)GeV- 2 in the |t|-range 0.04–0.2 GeV2. The dip position is |tdip|=(0.47±0.004stat±0.01syst)GeV2. 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.
Elastic differential cross-section measurement at √s=13 TeV by TOTEM / Antchev, G.; Aspell, P.; Atanassov, I.; Avati, V.; Baechler, J.; Barrera, C. B.; Berardi, V.; Berretti, M.; Bossini, E.; Bottigli, U.; Bozzo, M.; Burkhardt, H.; Cafagna, F. S.; Catanesi, M. G.; Csanad, M.; Csorgo, 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.; Kaspar, J.; Kopal, J.; Kundrat, V.; Lami, S.; Latino, G.; Lauhakangas, R.; Lindsey, C.; Lokajicek, M. V.; Losurdo, L.; Vetere, M. L.; Rodriguez, F. L.; Macri, M.; Malawski, M.; Minafra, N.; Minutoli, S.; Naaranoja, T.; Nemes, F.; Niewiadomski, H.; Novak, T.; Oliveri, E.; Oljemark, F.; Oriunno, M.; Osterberg, K.; Palazzi, P.; Passaro, V.; Peroutka, Z.; Prochazka, 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.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - STAMPA. - 79:10(2019). [10.1140/epjc/s10052-019-7346-7]
Elastic differential cross-section measurement at √s=13 TeV by TOTEM
Berardi V.;De Leonardis F.;Passaro V.;
2019-01-01
Abstract
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 10σ distance from the LHC beam, which allowed the measurement of the range [0.04 GeV2; 4 GeV2] in four-momentum transfer squared |t|. The efficient data acquisition allowed to collect about 109 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±0.002stat±0.01syst)GeV- 2 in the |t|-range 0.04–0.2 GeV2. The dip position is |tdip|=(0.47±0.004stat±0.01syst)GeV2. 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.| File | Dimensione | Formato | |
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