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



Aad, G, Abbott, B, Abbott, DC, Abud, A Abed, Abeling, K, Abidi, SH, Aboulhorma, A, Abramowicz, H, Abreu, H, Abulaiti, Y
et al (show 2865 more authors) (2023) Observation of the γγ → ττ Process in Pb plus Pb Collisions and Constraints on the τ-Lepton Anomalous Magnetic Moment with the ATLAS Detector PHYSICAL REVIEW LETTERS, 131 (15). 151802-. ISSN 0031-9007, 1079-7114

Access the full-text of this item by clicking on the Open Access link.

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.

Item Type: Article
Uncontrolled Keywords: ATLAS Collaboration
Divisions: Faculty of Science & Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 03 Nov 2023 16:31
Last Modified: 23 May 2026 08:08
DOI: 10.1103/PhysRevLett.131.151802
Open Access URL: https://journals.aps.org/prl/abstract/10.1103/Phys...
Related Websites:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3176539
Disclaimer: The University of Liverpool is not responsible for content contained on other websites from links within repository metadata. Please contact us if you notice anything that appears incorrect or inappropriate.