@misc{10481/70097,
year = {2021},
month = {6},
url = {http://hdl.handle.net/10481/70097},
abstract = {A search for pair production of third-generation scalar leptoquarks decaying into a top quark and a tau-lepton is presented. The search is based on a dataset of pp collisions at root s = 13 TeV recorded with the ATLAS detector during Run 2 of the Large Hadron Collider, corresponding to an integrated luminosity of 139 fb(-1). Events are selected if they have one light lepton (electron or muon) and at least one hadronically decaying tau-lepton, or at least two light leptons. In addition, two or more jets, at least one of which must be identified as containing b-hadrons, are required. Six final states, defined by the multiplicity and flavour of lepton candidates, are considered in the analysis. Each of them is split into multiple event categories to simultaneously search for the signal and constrain several leading backgrounds. The signal-rich event categories require at least one hadronically decaying tau-lepton candidate and exploit the presence of energetic final-state objects, which is characteristic of signal events. No significant excess above the Standard Model expectation is observed in any of the considered event categories, and 95% CL upper limits are set on the production cross section as a function of the leptoquark mass, for different assumptions about the branching fractions into t tau and b nu. Scalar leptoquarks decaying exclusively into t tau are excluded up to masses of 1.43 TeV while, for a branching fraction of 50% into t tau, the lower mass limit is 1.22 TeV.},
organization = {ANPCyT, Argentina},
organization = {YerPhI, Armenia},
organization = {ARC, Australia},
organization = {BMWFW and FWF, Austria},
organization = {ANAS, Azerbaijan},
organization = {SSTC, Belarus},
organization = {CNPq and FAPESP,
Brazil},
organization = {NSERC, NRC and CFI, Canada},
organization = {CERN},
organization = {ANID, Chile},
organization = {CAS, MOST and NSFC,
China},
organization = {COLCIENCIAS, Colombia},
organization = {MSMT CR, MPO CR and VSC CR, Czech Republic},
organization = {DNRF and DNSRC, Denmark},
organization = {IN2P3-CNRS and CEA-DRF/IRFU, France},
organization = {SRNSFG,
Georgia},
organization = {BMBF, HGF and MPG, Germany},
organization = {GSRT, Greece},
organization = {RGC and Hong Kong SAR,
China},
organization = {ISF and Benoziyo Center, Israel},
organization = {INFN, Italy},
organization = {MEXT and JSPS, Japan},
organization = {CNRST,
Morocco},
organization = {NWO, Netherlands},
organization = {RCN, Norway},
organization = {MNiSW and NCN, Poland},
organization = {FCT, Portugal},
organization = {MNE/IFA, Romania},
organization = {JINR},
organization = {MES of Russia and NRC KI, Russian Federation},
organization = {MESTD,
Serbia},
organization = {MSSR, Slovakia},
organization = {ARRS and MIZŠ, Slovenia},
organization = {DST/NRF, South Africa},
organization = {MICINN,
Spain},
organization = {SRC and Wallenberg Foundation, Sweden},
organization = {SERI, SNSF and Cantons of Bern and
Geneva, Switzerland},
organization = {MOST, Taiwan},
organization = {TAEK, Turkey},
organization = {STFC, United Kingdom},
organization = {DOE and
NSF, United States of America},
organization = {BCKDF, CANARIE, Compute Canada, CRC and IVADO, Canada},
organization = {Beijing
Municipal Science & Technology Commission, China},
organization = {COST, ERC, ERDF, Horizon 2020
and Marie Sk`odowska-Curie Actions, European Union},
organization = {Investissements d’Avenir Labex,
Investissements d’Avenir Idex and ANR, France},
organization = {DFG and AvH Foundation, Germany},
organization = {Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF,
Greece},
organization = {BSF-NSF and GIF, Israel},
organization = {La Caixa Banking Foundation, CERCA Programme
Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat Valenciana,
Spain},
organization = {Göran Gustafssons Stiftelse, Sweden},
organization = {The Royal Society and Leverhulme Trust,
United Kingdom.},
publisher = {Springer},
keywords = {Beyond Standard Model},
keywords = {Exotics},
keywords = {Hadron-Hadron scattering (experiments)},
title = {Search for pair production of third-generation scalar leptoquarks decaying into a top quark and a tau-lepton in pp collisions at root s=13 TeV with the ATLAS detector},
doi = {10.1007/JHEP06(2021)179},
author = {Aad, G. and Aguilar Saavedra, Juan Antonio and Atlas Collaboration},
}