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

TitleObservation of the γγ → ττ Process in Pb plus Pb Collisions and Constraints on the τ-Lepton Anomalous Magnetic Moment with the ATLAS Detector
Authors
Issue Date12-Oct-2023
PublisherAmerican Physical Society
Citation
Physical Review Letters, 2023, v. 131, n. 15, p. 1-23 How to Cite?
AbstractThis Letter reports the observation of tau-lepton-pair production in ultraperipheral lead-lead collisions Pb + Pb -> Pb(gamma gamma -> tau tau)Pb and constraints on the tau-lepton anomalous magnetic moment a(tau). The dataset corresponds to an integrated luminosity of 1.44 nb(-1) of LHC Pb + Pb collisions at root(NN)-N-s = 5.02 TeV recorded by the ATLAS experiment in 2018. Selected events contain one muon from a t-lepton decay, an electron or charged-particle track(s) from the other tau-lepton decay, little additional central-detector activity, and no forward neutrons. The gamma gamma -> tau tau process is observed in Pb + Pb collisions with a significance exceeding 5 standard deviations and a signal strength of mu(tau tau) = 1.03(-0.05)(+0.06) assuming the standard model value for a(tau). To measure a(tau), a template fit to the muon transverse-momentum distribution from tau-lepton candidates is performed, using a dimuon (gamma gamma -> mu mu) control sample to constrain systematic uncertainties. The observed 95% confidence-level interval for a(tau) is -0.057 < a(tau) < 0.024.
Persistent Identifierhttp://hdl.handle.net/10722/339994
ISSN
2023 Impact Factor: 8.1
2023 SCImago Journal Rankings: 3.040
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorAad, G-
dc.contributor.authorAbbott, B-
dc.contributor.authorAbbott, DC-
dc.contributor.authorTu, Yanjun-
dc.contributor.authorHuang, Shuhui-
dc.contributor.authorParedes Hernandez, Daniela Katherinne-
dc.contributor.authorPeng, Chen-
dc.contributor.authorTam, Kai Chung-
dc.contributor.authorATLAS Collaboration,-
dc.date.accessioned2024-03-11T10:40:52Z-
dc.date.available2024-03-11T10:40:52Z-
dc.date.issued2023-10-12-
dc.identifier.citationPhysical Review Letters, 2023, v. 131, n. 15, p. 1-23-
dc.identifier.issn0031-9007-
dc.identifier.urihttp://hdl.handle.net/10722/339994-
dc.description.abstractThis Letter reports the observation of tau-lepton-pair production in ultraperipheral lead-lead collisions Pb + Pb -> Pb(gamma gamma -> tau tau)Pb and constraints on the tau-lepton anomalous magnetic moment a(tau). The dataset corresponds to an integrated luminosity of 1.44 nb(-1) of LHC Pb + Pb collisions at root(NN)-N-s = 5.02 TeV recorded by the ATLAS experiment in 2018. Selected events contain one muon from a t-lepton decay, an electron or charged-particle track(s) from the other tau-lepton decay, little additional central-detector activity, and no forward neutrons. The gamma gamma -> tau tau process is observed in Pb + Pb collisions with a significance exceeding 5 standard deviations and a signal strength of mu(tau tau) = 1.03(-0.05)(+0.06) assuming the standard model value for a(tau). To measure a(tau), a template fit to the muon transverse-momentum distribution from tau-lepton candidates is performed, using a dimuon (gamma gamma -> mu mu) control sample to constrain systematic uncertainties. The observed 95% confidence-level interval for a(tau) is -0.057 < a(tau) < 0.024.-
dc.languageeng-
dc.publisherAmerican Physical Society-
dc.relation.ispartofPhysical Review Letters-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleObservation of the γγ → ττ Process in Pb plus Pb Collisions and Constraints on the τ-Lepton Anomalous Magnetic Moment with the ATLAS Detector-
dc.typeArticle-
dc.identifier.doi10.1103/PhysRevLett.131.151802-
dc.identifier.pmid37897746-
dc.identifier.scopuseid_2-s2.0-85185370802-
dc.identifier.volume131-
dc.identifier.issue15-
dc.identifier.spage1-
dc.identifier.epage23-
dc.identifier.eissn1079-7114-
dc.identifier.isiWOS:001094306100001-
dc.publisher.placeCOLLEGE PK-
dc.identifier.issnl0031-9007-

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