Elastic differential cross-section measurement at root s=13 TeV by TOTEM

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TOTEM Collaboration , Antchev , G , Berretti , M , Garcia , F , Lauhakangas , R , Naaranoja , T , Oljemark , F , Österberg , K , Saarikko , H & Welti , J 2019 , ' Elastic differential cross-section measurement at root s=13 TeV by TOTEM ' , European Physical Journal C. Particles and Fields , vol. 79 , no. 10 , 861 . https://doi.org/10.1140/epjc/s10052-019-7346-7

Title: Elastic differential cross-section measurement at root s=13 TeV by TOTEM
Author: TOTEM Collaboration; Antchev, G.; Berretti, M.; Garcia, F.; Lauhakangas, R.; Naaranoja, T.; Oljemark, F.; Österberg, K.; Saarikko, H.; Welti, J.
Contributor: 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, Helsinki Institute of Physics
Date: 2019-10
Language: eng
Number of pages: 15
Belongs to series: European Physical Journal C. Particles and Fields
ISSN: 1434-6044
URI: http://hdl.handle.net/10138/306682
Abstract: The TOTEM collaboration has measured the velastic proton-proton differential cross section d sigma/dt at root s = 13 TeV LHC energy using dedicated beta* = 90 m beam optics. The Roman Pot detectors were inserted to 10s distance from the LHC beam, which allowed the measurement of the range [0.04 GeV2; 4 GeV2] in four-momentum transfer squared vertical bar t vertical bar. 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-vertical bar t vertical bar tail. The average nuclear slope has been found to be B = (20.40 +/- 0.002(stat) +/- 0.01(syst)) GeV-2 in the vertical bar t vertical bar-range 0.04-0.2 GeV2. The dip position is vertical bar t(dip)vertical bar = (0.47 +/- 0.004(stat)+/- 0.01(syst)) 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.
Subject: 114 Physical sciences
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