Observation of photon-induced W+ W- production in pp collisions at root s=13 TeV using the ATLAS detector

Agni Bethani; Brian Cox; Cinzia Da Via; Nicholas Dann; Alessandra Forti; Frederick Loebinger; Jiri Masik; Stephen Menary; Francisca Munoz Sanchez; Alexander Oh; Joleen Pater; Yvonne Peters; Andrew Pilkington; Darren Price; Yang Qin; Savanna Shaw; Stephen Watts; Terence Wyatt; Savannah Clawson; The ATLAS Collaboration

doi:10.1016/j.physletb.2021.136190

Observation of photon-induced W+ W- production in pp collisions at root s=13 TeV using the ATLAS detector

Agni Bethani, Brian Cox, Cinzia Da Via, Nicholas Dann, Alessandra Forti, Frederick Loebinger, Jiri Masik, Stephen Menary, Francisca Munoz Sanchez, Alexander Oh, Joleen Pater, Yvonne Peters, Andrew Pilkington, Darren Price, Yang Qin, Savanna Shaw, Stephen Watts, Terence Wyatt, Savannah Clawson, The ATLAS Collaboration

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Abstract

This letter reports the observation of photon-induced production of W-boson pairs, γγ→WW. The analysis uses 139 fb ⁻¹ of LHC proton–proton collision data taken at s=13 TeV recorded by the ATLAS experiment during the years 2015–2018. The measurement is performed selecting one electron and one muon, corresponding to the decay of the diboson system as WW→e ^±νμ ^∓ν final state. The background-only hypothesis is rejected with a significance of well above 5 standard deviations consistent with the expectation from Monte Carlo simulation. A cross section for the γγ→WW process of 3.13±0.31(stat.)±0.28(syst.) fb is measured in a fiducial volume close to the acceptance of the detector, by requiring an electron and a muon of opposite signs with large dilepton transverse momentum and exactly zero additional charged particles. This is found to be in agreement with the Standard Model prediction.

Original language	English
Article number	136190
Journal	Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	816
Early online date	10 Mar 2021
DOIs	https://doi.org/10.1016/j.physletb.2021.136190
Publication status	Published - 10 May 2021

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Bethani, A., Cox, B., Da Via, C., Dann, N., Forti, A., Loebinger, F., Masik, J., Menary, S., Munoz Sanchez, F., Oh, A., Pater, J., Peters, Y., Pilkington, A., Price, D., Qin, Y., Shaw, S., Watts, S., Wyatt, T., Clawson, S., & The ATLAS Collaboration (2021). Observation of photon-induced W+ W- production in pp collisions at root s=13 TeV using the ATLAS detector. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 816, Article 136190. https://doi.org/10.1016/j.physletb.2021.136190

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title = "Observation of photon-induced W+ W- production in pp collisions at root s=13 TeV using the ATLAS detector",

abstract = "This letter reports the observation of photon-induced production of W-boson pairs, γγ→WW. The analysis uses 139 fb −1 of LHC proton–proton collision data taken at s=13 TeV recorded by the ATLAS experiment during the years 2015–2018. The measurement is performed selecting one electron and one muon, corresponding to the decay of the diboson system as WW→e ±νμ ∓ν final state. The background-only hypothesis is rejected with a significance of well above 5 standard deviations consistent with the expectation from Monte Carlo simulation. A cross section for the γγ→WW process of 3.13±0.31(stat.)±0.28(syst.) fb is measured in a fiducial volume close to the acceptance of the detector, by requiring an electron and a muon of opposite signs with large dilepton transverse momentum and exactly zero additional charged particles. This is found to be in agreement with the Standard Model prediction. ",

author = "Agni Bethani and Brian Cox and {Da Via}, Cinzia and Nicholas Dann and Alessandra Forti and Frederick Loebinger and Jiri Masik and Stephen Menary and {Munoz Sanchez}, Francisca and Alexander Oh and Joleen Pater and Yvonne Peters and Andrew Pilkington and Darren Price and Yang Qin and Savanna Shaw and Stephen Watts and Terence Wyatt and Savannah Clawson and {The ATLAS Collaboration}",

year = "2021",

month = may,

day = "10",

doi = "10.1016/j.physletb.2021.136190",

language = "English",

volume = "816",

journal = "Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier BV",

}

Bethani, A, Cox, B, Da Via, C, Dann, N, Forti, A, Loebinger, F, Masik, J, Menary, S, Munoz Sanchez, F , Oh, A, Pater, J, Peters, Y , Pilkington, A , Price, D, Qin, Y, Shaw, S, Watts, S, Wyatt, T, Clawson, S & The ATLAS Collaboration 2021, 'Observation of photon-induced W+ W- production in pp collisions at root s=13 TeV using the ATLAS detector', Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 816, 136190. https://doi.org/10.1016/j.physletb.2021.136190

TY - JOUR

T1 - Observation of photon-induced W+ W- production in pp collisions at root s=13 TeV using the ATLAS detector

AU - Bethani, Agni

AU - Cox, Brian

AU - Da Via, Cinzia

AU - Dann, Nicholas

AU - Forti, Alessandra

AU - Loebinger, Frederick

AU - Masik, Jiri

AU - Menary, Stephen

AU - Munoz Sanchez, Francisca

AU - Oh, Alexander

AU - Pater, Joleen

AU - Peters, Yvonne

AU - Pilkington, Andrew

AU - Price, Darren

AU - Qin, Yang

AU - Shaw, Savanna

AU - Watts, Stephen

AU - Wyatt, Terence

AU - Clawson, Savannah

AU - The ATLAS Collaboration,

PY - 2021/5/10

Y1 - 2021/5/10

N2 - This letter reports the observation of photon-induced production of W-boson pairs, γγ→WW. The analysis uses 139 fb −1 of LHC proton–proton collision data taken at s=13 TeV recorded by the ATLAS experiment during the years 2015–2018. The measurement is performed selecting one electron and one muon, corresponding to the decay of the diboson system as WW→e ±νμ ∓ν final state. The background-only hypothesis is rejected with a significance of well above 5 standard deviations consistent with the expectation from Monte Carlo simulation. A cross section for the γγ→WW process of 3.13±0.31(stat.)±0.28(syst.) fb is measured in a fiducial volume close to the acceptance of the detector, by requiring an electron and a muon of opposite signs with large dilepton transverse momentum and exactly zero additional charged particles. This is found to be in agreement with the Standard Model prediction.

AB - This letter reports the observation of photon-induced production of W-boson pairs, γγ→WW. The analysis uses 139 fb −1 of LHC proton–proton collision data taken at s=13 TeV recorded by the ATLAS experiment during the years 2015–2018. The measurement is performed selecting one electron and one muon, corresponding to the decay of the diboson system as WW→e ±νμ ∓ν final state. The background-only hypothesis is rejected with a significance of well above 5 standard deviations consistent with the expectation from Monte Carlo simulation. A cross section for the γγ→WW process of 3.13±0.31(stat.)±0.28(syst.) fb is measured in a fiducial volume close to the acceptance of the detector, by requiring an electron and a muon of opposite signs with large dilepton transverse momentum and exactly zero additional charged particles. This is found to be in agreement with the Standard Model prediction.

U2 - 10.1016/j.physletb.2021.136190

DO - 10.1016/j.physletb.2021.136190

M3 - Article

SN - 0370-2693

VL - 816

JO - Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 136190

ER -

Observation of photon-induced W+ W- production in pp collisions at root s=13 TeV using the ATLAS detector

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