Observation and Measurement of Forward Proton Scattering in Association with Lepton Pairs Produced via the Photon Fusion Mechanism at ATLAS

ATLAS Collaboration (2020) Observation and Measurement of Forward Proton Scattering in Association with Lepton Pairs Produced via the Photon Fusion Mechanism at ATLAS. Physical review letters, 125 (26). ISSN 1079-7114

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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 σee+p=11.0±2.6(stat)±1.2(syst)±0.3(lumi) and σμμ+p=7.2±1.6(stat)±0.9(syst)±0.2(lumi) fb in the dielectron and dimuon channel, respectively.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
?? PHOTONSRUTHERFORD BACKSCATTERING SPECTROSCOPYTELLURIUM COMPOUNDSATLAS DETECTORSCROSS-SECTION MEASUREMENTFUSION MECHANISMINTEGRATED LUMINOSITYOBSERVATION AND MEASUREMENTPROTON PROTON COLLISIONSPROTON SCATTERINGSTANDARD DEVIATIONFORWARD SCATTERINGPHYSICS AN ??
ID Code:
151275
Deposited By:
Deposited On:
01 Feb 2021 16:10
Refereed?:
Yes
Published?:
Published
Last Modified:
26 May 2024 00:10