Observation of the γγ → ττ Process in Pb + Pb Collisions and Constraints on the τ-Lepton Anomalous Magnetic Moment with the ATLAS Detector

ATLAS Collaboration

doi:10.1103/PhysRevLett.131.151802

Observation of the γγ → ττ Process in Pb + Pb Collisions and Constraints on the τ-Lepton Anomalous Magnetic Moment with the ATLAS Detector

ATLAS Collaboration

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

23 Scopus citations

Abstract

This Letter reports the observation of Formula Presented-lepton-pair production in ultraperipheral lead-lead collisions Formula Presented and constraints on the Formula Presented-lepton anomalous magnetic moment Formula Presented. The dataset corresponds to an integrated luminosity of Formula Presented of LHC Formula Presented collisions at Formula Presented recorded by the ATLAS experiment in 2018. Selected events contain one muon from a Formula Presented-lepton decay, an electron or charged-particle track(s) from the other Formula Presented-lepton decay, little additional central-detector activity, and no forward neutrons. The Formula Presented process is observed in Formula Presented collisions with a significance exceeding 5 standard deviations and a signal strength of Formula Presented assuming the standard model value for Formula Presented. To measure Formula Presented, a template fit to the muon transverse-momentum distribution from Formula Presented-lepton candidates is performed, using a dimuon (Formula Presented) control sample to constrain systematic uncertainties. The observed 95% confidence-level interval for Formula Presented is Formula Presented.

Original language	English (US)
Article number	151802
Journal	Physical review letters
Volume	131
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.131.151802
State	Published - Oct 13 2023
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2023 CERN, for the ATLAS Collaboration.

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10.1103/PhysRevLett.131.151802

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@article{94d158d904034519b40c26dafa91bcdf,

title = "Observation of the γγ → ττ Process in Pb + Pb Collisions and Constraints on the τ-Lepton Anomalous Magnetic Moment with the ATLAS Detector",

abstract = "This Letter reports the observation of Formula Presented-lepton-pair production in ultraperipheral lead-lead collisions Formula Presented and constraints on the Formula Presented-lepton anomalous magnetic moment Formula Presented. The dataset corresponds to an integrated luminosity of Formula Presented of LHC Formula Presented collisions at Formula Presented recorded by the ATLAS experiment in 2018. Selected events contain one muon from a Formula Presented-lepton decay, an electron or charged-particle track(s) from the other Formula Presented-lepton decay, little additional central-detector activity, and no forward neutrons. The Formula Presented process is observed in Formula Presented collisions with a significance exceeding 5 standard deviations and a signal strength of Formula Presented assuming the standard model value for Formula Presented. To measure Formula Presented, a template fit to the muon transverse-momentum distribution from Formula Presented-lepton candidates is performed, using a dimuon (Formula Presented) control sample to constrain systematic uncertainties. The observed 95% confidence-level interval for Formula Presented is Formula Presented.",

author = "{ATLAS Collaboration} and Filmer, {E. K.} and P. Jackson and Kong, {A. X.Y.} and H. Potti and Ruggeri, {T. A.} and Ting, {E. X.L.} and White, {M. J.} and Gingrich, {D. M.} and Lindon, {J. H.} and N. Nishu and Pinfold, {J. L.} and O. Cakir and Yildiz, {H. Duran} and S. Kuday and {Turk Cakir}, I. and S. Sultansoy and {Adam Bourdarios}, C. and N. Berger and F. Costanza and M. Delmastro and {Di Ciaccio}, L. and C. Goy and T. Guillemin and T. Hryn{\textquoteright}ova and S. J{\'e}z{\'e}quel and I. Koletsou and J. Lev{\^e}que and Little, {J. D.} and {Lorenzo Martinez}, N. and G. Poddar and E. Rossi and {Sanchez Pineda}, A. and E. Sauvan and L. Selem and G. Bernardi and M. Bomben and R. Bouquet and G. Marchiori and Bhopatkar, {V. S.} and S. Chekanov and S. Darmora and Hopkins, {W. H.} and E. Kourlitis and T. LeCompte and J. Love and J. Metcalfe and Mete, {A. S.} and A. Paramonov and Mahon, {D. J.} and Muse, {J. M.}",

note = "Publisher Copyright: {\textcopyright} 2023 CERN, for the ATLAS Collaboration.",

year = "2023",

month = oct,

day = "13",

doi = "10.1103/PhysRevLett.131.151802",

language = "English (US)",

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journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

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TY - JOUR

T1 - Observation of the γγ → ττ Process in Pb + Pb Collisions and Constraints on the τ-Lepton Anomalous Magnetic Moment with the ATLAS Detector

AU - ATLAS Collaboration

AU - Filmer, E. K.

AU - Jackson, P.

AU - Kong, A. X.Y.

AU - Potti, H.

AU - Ruggeri, T. A.

AU - Ting, E. X.L.

AU - White, M. J.

AU - Gingrich, D. M.

AU - Lindon, J. H.

AU - Nishu, N.

AU - Pinfold, J. L.

AU - Cakir, O.

AU - Yildiz, H. Duran

AU - Kuday, S.

AU - Turk Cakir, I.

AU - Sultansoy, S.

AU - Adam Bourdarios, C.

AU - Berger, N.

AU - Costanza, F.

AU - Delmastro, M.

AU - Di Ciaccio, L.

AU - Goy, C.

AU - Guillemin, T.

AU - Hryn’ova, T.

AU - Jézéquel, S.

AU - Koletsou, I.

AU - Levêque, J.

AU - Little, J. D.

AU - Lorenzo Martinez, N.

AU - Poddar, G.

AU - Rossi, E.

AU - Sanchez Pineda, A.

AU - Sauvan, E.

AU - Selem, L.

AU - Bernardi, G.

AU - Bomben, M.

AU - Bouquet, R.

AU - Marchiori, G.

AU - Bhopatkar, V. S.

AU - Chekanov, S.

AU - Darmora, S.

AU - Hopkins, W. H.

AU - Kourlitis, E.

AU - LeCompte, T.

AU - Love, J.

AU - Metcalfe, J.

AU - Mete, A. S.

AU - Paramonov, A.

AU - Mahon, D. J.

AU - Muse, J. M.

PY - 2023/10/13

Y1 - 2023/10/13

N2 - This Letter reports the observation of Formula Presented-lepton-pair production in ultraperipheral lead-lead collisions Formula Presented and constraints on the Formula Presented-lepton anomalous magnetic moment Formula Presented. The dataset corresponds to an integrated luminosity of Formula Presented of LHC Formula Presented collisions at Formula Presented recorded by the ATLAS experiment in 2018. Selected events contain one muon from a Formula Presented-lepton decay, an electron or charged-particle track(s) from the other Formula Presented-lepton decay, little additional central-detector activity, and no forward neutrons. The Formula Presented process is observed in Formula Presented collisions with a significance exceeding 5 standard deviations and a signal strength of Formula Presented assuming the standard model value for Formula Presented. To measure Formula Presented, a template fit to the muon transverse-momentum distribution from Formula Presented-lepton candidates is performed, using a dimuon (Formula Presented) control sample to constrain systematic uncertainties. The observed 95% confidence-level interval for Formula Presented is Formula Presented.

AB - This Letter reports the observation of Formula Presented-lepton-pair production in ultraperipheral lead-lead collisions Formula Presented and constraints on the Formula Presented-lepton anomalous magnetic moment Formula Presented. The dataset corresponds to an integrated luminosity of Formula Presented of LHC Formula Presented collisions at Formula Presented recorded by the ATLAS experiment in 2018. Selected events contain one muon from a Formula Presented-lepton decay, an electron or charged-particle track(s) from the other Formula Presented-lepton decay, little additional central-detector activity, and no forward neutrons. The Formula Presented process is observed in Formula Presented collisions with a significance exceeding 5 standard deviations and a signal strength of Formula Presented assuming the standard model value for Formula Presented. To measure Formula Presented, a template fit to the muon transverse-momentum distribution from Formula Presented-lepton candidates is performed, using a dimuon (Formula Presented) control sample to constrain systematic uncertainties. The observed 95% confidence-level interval for Formula Presented is Formula Presented.

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DO - 10.1103/PhysRevLett.131.151802

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VL - 131

JO - Physical review letters

JF - Physical review letters

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M1 - 151802

ER -

Observation of the γγ → ττ Process in Pb + Pb Collisions and Constraints on the τ-Lepton Anomalous Magnetic Moment with the ATLAS Detector

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