Search for new phenomena in pp collisions in final states with tau leptons, b -jets, and missing transverse momentum with the ATLAS detector
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Archivos
Fecha
2021-12
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
American Physical Society
Nombre de Curso
Licencia CC
Atribution 4.0 International (CC BY 4.0)
Licencia CC
https://creativecommons.org/licenses/by/4.0/deed.es
Resumen
A search for new phenomena in final states with hadronically decaying tau leptons,
b
-jets, and missing transverse momentum is presented. The analyzed dataset comprises
p
p
collision data at a center-of-mass energy of
√
s
=
13
TeV
with an integrated luminosity of
139
fb
−
1
, delivered by the Large Hadron Collider and recorded with the ATLAS detector from 2015 to 2018. The observed data are compatible with the expected Standard Model background. The results are interpreted in simplified models for two different scenarios. The first model is based on supersymmetry and considers pair production of top squarks, each of which decays into a
b
-quark, a neutrino and a tau slepton. Each tau slepton in turn decays into a tau lepton and a nearly massless gravitino. Within this model, top-squark masses up to 1.4 TeV can be excluded at the 95% confidence level over a wide range of tau-slepton masses. The second model considers pair production of leptoquarks with decays into third-generation leptons and quarks. Depending on the branching fraction into charged leptons, leptoquarks with masses up to around 1.25 TeV can be excluded at the 95% confidence level for the case of scalar leptoquarks and up to 1.8 TeV (1.5 TeV) for vector leptoquarks in a Yang–Mills (minimal-coupling) scenario. In addition, model-independent upper limits are set on the cross section of processes beyond the Standard Model.
Notas
Indexación: Scopus.
Palabras clave
ATLAS Detector, Phenomena, Particle Physics, leptoquark, Tau Leptons, Bottoms Quark, Physical Systems, Properties
Citación
Physical Review D Volume 104, Issue 111 December 2021 Article number A41
DOI
10.1103/PhysRevD.104.112005