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

ATLAS Publications; T.M. Carter; M. Faucci Giannelli; A. Hasib; M.P. Heath; S. Palazzo; A. Søgaard; E.P. Takeva; A.J. Taylor; N. Themistokleous; E.M. Villhauer

doi:10.1103/PhysRevLett.125.261801

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

ATLAS Publications, T.M. Carter, M. Faucci Giannelli, A. Hasib, M.P. Heath, S. Palazzo, A. Søgaard, E.P. Takeva, A.J. Taylor, N. Themistokleous, E.M. Villhauer

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Article number	261801
Pages (from-to)	1-21
Number of pages	21
Journal	Physical Review Letters
Volume	125
Issue number	26
DOIs	https://doi.org/10.1103/PhysRevLett.125.261801
Publication status	Published - 23 Dec 2020

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http://arxiv.org/abs/2009.14537

1 Active
5 Finished

Upgrade of the ATLAS detector at the LHC (2023-26)
Clark, P. (Principal Investigator)
1/04/23 → 31/03/26
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
1/04/23 → 30/09/25
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
1/10/22 → 30/09/25
Project: Research

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ATLAS Publications, Carter, T. M., Faucci Giannelli, M., Hasib, A., Heath, M. P., Palazzo, S., Søgaard, A., Takeva, E. P., Taylor, A. J., Themistokleous, N., & Villhauer, E. M. (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), 1-21. Article 261801. https://doi.org/10.1103/PhysRevLett.125.261801

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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",

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.",

author = "\{ATLAS Publications\} and Clark, \{Philip James\} and Sinead Farrington and Yanyan Gao and Christos Leonidopoulos and Martin, \{Victoria Jane\} and Liza Mijovic and Benjamin Wynne and T.M. Carter and \{Faucci Giannelli\}, M. and A. Hasib and M.P. Heath and S. Palazzo and A. S{\o}gaard and E.P. Takeva and A.J. Taylor and N. Themistokleous and E.M. Villhauer",

year = "2020",

month = dec,

day = "23",

doi = "10.1103/PhysRevLett.125.261801",

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ATLAS Publications, Carter, TM, Faucci Giannelli, M, Hasib, A, Heath, MP, Palazzo, S, Søgaard, A, Takeva, EP, Taylor, AJ, Themistokleous, N & Villhauer, EM 2020, 'Observation and Measurement of Forward Proton Scattering in Association with Lepton Pairs Produced via the Photon Fusion Mechanism at ATLAS', Physical Review Letters, vol. 125, no. 26, 261801, pp. 1-21. https://doi.org/10.1103/PhysRevLett.125.261801

TY - JOUR

T1 - Observation and Measurement of Forward Proton Scattering in Association with Lepton Pairs Produced via the Photon Fusion Mechanism at ATLAS

AU - ATLAS Publications

AU - Clark, Philip James

AU - Farrington, Sinead

AU - Gao, Yanyan

AU - Leonidopoulos, Christos

AU - Martin, Victoria Jane

AU - Mijovic, Liza

AU - Wynne, Benjamin

AU - Carter, T.M.

AU - Faucci Giannelli, M.

AU - Hasib, A.

AU - Heath, M.P.

AU - Palazzo, S.

AU - Søgaard, A.

AU - Takeva, E.P.

AU - Taylor, A.J.

AU - Themistokleous, N.

AU - Villhauer, E.M.

PY - 2020/12/23

Y1 - 2020/12/23

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevLett.125.261801

DO - 10.1103/PhysRevLett.125.261801

M3 - Article

SN - 0031-9007

VL - 125

SP - 1

EP - 21

JO - Physical Review Letters

JF - Physical Review Letters

IS - 26

M1 - 261801

ER -

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

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Upgrade of the ATLAS detector at the LHC (2023-26)

Experimental Particle Physics at the University of Edinburgh

Experimental Particle Physics at the University of Edinburgh

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