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|Title:||Observation and measurement of forward proton scattering in association with lepton pairs produced via the photon fusion mechanism at ATLAS|
Abed Abud, A.
Adam Bourdarios, C.
|Citation:||Physical Review Letters, 2020; 125(26):261801-1-261801-21|
|Publisher:||American Physical Society|
|G. Aad … D. Duvnjak … P. Jackson … J.L. Oliver … A.S. Sharma … M.J. White … et al. [The ATLAS Collaboration]|
|Abstract:||The observation of forward proton scattering in association with lepton pairs (e⁺e⁻ + p or μ⁺μ⁻ + p) produced via photon fusion is presented. The scattered proton is detected by the ATLAS Forward Proton spectrometer, while the leptons are reconstructed by the central ATLAS detector. Proton-proton collision data recorded in 2017 at a center-of-mass energy of √s=13 TeV are analyzed, corresponding to an integrated luminosity of 14.6 fb⁻¹. A total of 57 (123) candidates in the ee + p (μμ + p) final state are selected, allowing the background-only hypothesis to be rejected with a significance exceeding 5 standard deviations in each channel. Proton-tagging techniques are introduced for cross-section measurements in the fiducial detector acceptance, corresponding to σ(ee+p) = 11.0 ± 2.6(stat) ± 1.2(syst) ± 0.3(lumi) and σ(μμ+p) = 7.2 ± 1.6(stat) ± 0.9(syst ) ± 0.2(lumi) fb in the dielectron and dimuon channel, respectively.|
|Rights:||© 2020 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.|
|Appears in Collections:||Physics publications|
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