Constraining R-axion models through dijet searches at the LHC

The search at hadron colliders for new massive resonances of a few 100 GeVs that couple effectively to colored states is an extremely challenging issue, due principally to the presence of large QCD multijet backgrounds at this energy, rendering the searches at the LHC particularly difficult. Recentl...

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Detalles Bibliográficos
Autores principales: Arganda Carreras, Ernesto, Medina, Aníbal Damián, Mileo, Nicolás Ismael, Morales, Roberto Aníbal, Szynkman, Alejandro Andrés
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Ciencias Exactas
Física
hadron colliders
LHC
initial-state radiation (ISR)
Physics
axion
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/125758
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-125758
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
hadron colliders
LHC
initial-state radiation (ISR)
Physics
axion
spellingShingle Ciencias Exactas
Física
hadron colliders
LHC
initial-state radiation (ISR)
Physics
axion
Arganda Carreras, Ernesto
Medina, Aníbal Damián
Mileo, Nicolás Ismael
Morales, Roberto Aníbal
Szynkman, Alejandro Andrés
Constraining R-axion models through dijet searches at the LHC
topic_facet Ciencias Exactas
Física
hadron colliders
LHC
initial-state radiation (ISR)
Physics
axion
description The search at hadron colliders for new massive resonances of a few 100 GeVs that couple effectively to colored states is an extremely challenging issue, due principally to the presence of large QCD multijet backgrounds at this energy, rendering the searches at the LHC particularly difficult. Recently, it was realized that these large backgrounds could be overcome by demanding one high-p<sub>T</sub> jet from initial-state radiation (ISR) and by means of novel jet-reconstruction techniques through which the resulting hadronized products of the massive resonances are reconstructed as a fat-jet, a unique large-radius jet. The ATLAS and CMS Collaborations have recently reported searches for the experimental signature of a single fat-jet in association with an ISR jet. Models of dynamical supersymmetry breaking with an spontaneously broken R-symmetry give rise to the appearance of a pseudo-Nambu–Goldstone boson called the R-axion, which naturally tends to be light. In the parameter space regions where the anomalous R-axion coupling to gluons is boosted, these models can be tested against these new LHC dijet searches. Taking into account the CMS search, we apply the q<sub>μ</sub> statistical method to the signal events against the background-only expectation and obtain the 95% C.L. exclusion limits on the most relevant model parameters for a particular messenger sector, namely, the R-axion mass m<sub>a</sub>, the decay constant f<sub>a</sub>, and the number of color messengers N, being these limits suitable to be applied to more general models with axion-like particles.
format Articulo
Articulo
author Arganda Carreras, Ernesto
Medina, Aníbal Damián
Mileo, Nicolás Ismael
Morales, Roberto Aníbal
Szynkman, Alejandro Andrés
author_facet Arganda Carreras, Ernesto
Medina, Aníbal Damián
Mileo, Nicolás Ismael
Morales, Roberto Aníbal
Szynkman, Alejandro Andrés
author_sort Arganda Carreras, Ernesto
title Constraining R-axion models through dijet searches at the LHC
title_short Constraining R-axion models through dijet searches at the LHC
title_full Constraining R-axion models through dijet searches at the LHC
title_fullStr Constraining R-axion models through dijet searches at the LHC
title_full_unstemmed Constraining R-axion models through dijet searches at the LHC
title_sort constraining r-axion models through dijet searches at the lhc
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/125758
work_keys_str_mv AT argandacarrerasernesto constrainingraxionmodelsthroughdijetsearchesatthelhc
AT medinaanibaldamian constrainingraxionmodelsthroughdijetsearchesatthelhc
AT mileonicolasismael constrainingraxionmodelsthroughdijetsearchesatthelhc
AT moralesrobertoanibal constrainingraxionmodelsthroughdijetsearchesatthelhc
AT szynkmanalejandroandres constrainingraxionmodelsthroughdijetsearchesatthelhc
bdutipo_str Repositorios
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