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

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    0540657 - FZÚ 2021 RIV US eng J - Journal Article
    Antchev, G. - Aspell, P. - Atanassov, I. - Kašpar, Jan - Kundrát, Vojtěch - Lokajíček, Miloš V. … Total 76 authors
    Elastic differential cross-section measurement at √s = 13 TeV by TOTEM.
    European Physical Journal C. Roč. 79, č. 10 (2019), s. 1-15, č. článku 861. ISSN 1434-6044. E-ISSN 1434-6052
    R&D Projects: GA MŠk(CZ) LTT17018
    Research Infrastructure: CERN-CZ - 90058
    Institutional support: RVO:68378271
    Keywords : elastic pp scattering at LHC * Coulomb-hadronic interference
    OECD category: Particles and field physics
    Impact factor: 4.389, year: 2019
    Method of publishing: Open access

    The TOTEM collaboration has measured the elastic proton-proton differential cross section dσ/dt 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 GeV 2] in four-momentumtransfer squared |t|. The average nuclear slope has been found to be B = (20.40± 0.002 stat ± 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±0.01stat 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.
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