Search for charged-lepton-flavor violating 𝜇⁢𝜏⁢𝑞⁢𝑡 interactions in top-quark production and decay in 𝑝⁢𝑝 collisions at √𝑠=13  TeV with the ATLAS detector at the LHC

The ATLAS collaboration; P. Czodrowski; S. Morgenstern; A. Berthold; N. Fritzsche; M. Gutsche; A. Hadef; T. Herrmann; O. Kolay; T. Kresse; J. E. Nitschke; F. Siegert; M. V. Stange; A. Straessner; S. Todt; J. C. Voigt; J. Manjarres Ramos; H. Torres

doi:10.1103/PhysRevD.110.012014

Search for charged-lepton-flavor violating 𝜇⁢𝜏⁢𝑞⁢𝑡 interactions in top-quark production and decay in 𝑝⁢𝑝 collisions at √𝑠=13 TeV with the ATLAS detector at the LHC

Research output: Contribution to journal › Research article › Contributed › peer-review

Contributors

The ATLAS collaboration - , University of Bucharest, iThemba Laboratory for Accelerator Based Sciences, University of Pretoria, University of South Africa, University of Zululand, Cadi Ayyad University, New York University Abu Dhabi, University of Granada, CERN, University of California at Berkeley, University of Georgia (Tbilisi), Yeditepe University, Mohammed VI Polytechnic University (Author)
P. Czodrowski - , CERN (Author)
S. Morgenstern - , CERN (Author)
A. Berthold - , Chair of Experimental Particle Physics, TUD Dresden University of Technology (Author)
N. Fritzsche - , Chair of Experimental Particle Physics, TUD Dresden University of Technology (Author)
M. Gutsche - , Chair of Experimental Particle Physics, Institute of Nuclear and Particle Physics, Chair of Particle Physics, TUD Dresden University of Technology (Author)
A. Hadef - , Chair of Experimental Particle Physics, TUD Dresden University of Technology (Author)
T. Herrmann - , Chair of Particle Physics, TUD Dresden University of Technology (Author)
O. Kolay - , Chair of Particle Physics, TUD Dresden University of Technology (Author)
T. Kresse - , Chair of Experimental Particle Physics, Institute of Nuclear and Particle Physics, Chair of Particle Physics, TUD Dresden University of Technology (Author)
J. E. Nitschke - , Chair of Particle Physics, TUD Dresden University of Technology (Author)
F. Siegert - , Chair of Particle Physics, TUD Dresden University of Technology (Author)
M. V. Stange - , Institute of Nuclear and Particle Physics, Chair of Particle Physics, TUD Dresden University of Technology (Author)
A. Straessner - , Chair of Experimental Particle Physics, TUD Dresden University of Technology (Author)
S. Todt - , Institute of Nuclear and Particle Physics, TUD Dresden University of Technology (Author)
J. C. Voigt - , Chair of Experimental Particle Physics, TUD Dresden University of Technology (Author)
J. Manjarres Ramos - , French National Centre for Scientific Research (CNRS) (Author)
H. Torres - , French National Centre for Scientific Research (CNRS) (Author)

University of Adelaide
Université Paris-Saclay
University of Alberta
TRIUMF
Ankara University
TOBB University of Economics and Technology
Laboratoire d'Annecy-le-Vieux de Physique des Particules LAPP

Abstract

A search for charged-lepton-flavor violating Formula Presented (Formula Presented, Formula Presented) interactions is presented, considering both top-quark production and decay. The data analyzed correspond to Formula Presented of proton-proton collisions at a center-of-mass energy of Formula Presented recorded with the ATLAS detector at the Large Hadron Collider. The analysis targets events containing two muons with the same electric charge, a hadronically decaying Formula Presented-lepton and at least one jet, with exactly one Formula Presented-tagged jet, produced by a Formula Presented interaction. Agreement with the Standard Model expectation within 1.6 standard deviations is observed, and limits are set at the 95% confidence level (CL) on the charged-lepton-flavor violation branching ratio of Formula Presented. An effective field theory interpretation is performed yielding 95% CL limits on Wilson coefficients, dependent on the flavor of the associated light quark and the Lorentz structure of the coupling. These range from Formula Presented for Formula Presented to Formula Presented for Formula Presented. An additional interpretation is performed for scalar leptoquark production inducing charged-lepton-flavor violation, with fixed intergenerational couplings. Upper limits on leptoquark coupling strengths are set at the 95% CL, ranging from Formula Presented to Formula Presented for leptoquark masses between 0.5 and 2.0 TeV.

Details

Original language	English
Article number	012014
Pages (from-to)	1-35
Number of pages	35
Journal	Physical review d
Volume	110
Issue number	1
Publication status	Published - 25 Jul 2024
Peer-reviewed	Yes

External IDs

ORCID	/0000-0003-0546-1634/work/173516673

Keywords

ASJC Scopus subject areas

Nuclear and High Energy Physics