Search for metastable heavy charged particles with large ionization energy loss in pp collisions at √s =13 TeV using the ATLAS experiment

This paper presents a search for massive charged long-lived particles produced in pp collisions at √s=13 TeV at the LHC using the ATLAS experiment. The data set used corresponds to an integrated luminosity of 3.2 fb-1. Many extensions of the Standard Model predict the existence of massive charged lo...

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Detalles Bibliográficos
Autores principales: Alconada Verzini, María Josefina, Alonso, Francisco, Arduh, Francisco Anuar, Dova, María Teresa, Monticelli, Fernando Gabriel, Wahlberg, Hernán Pablo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Física
Magnetic monopoles
Magnetic charge
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/86241
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-86241
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Magnetic monopoles
Magnetic charge
spellingShingle Física
Magnetic monopoles
Magnetic charge
Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
Search for metastable heavy charged particles with large ionization energy loss in pp collisions at √s =13 TeV using the ATLAS experiment
topic_facet Física
Magnetic monopoles
Magnetic charge
description This paper presents a search for massive charged long-lived particles produced in pp collisions at √s=13 TeV at the LHC using the ATLAS experiment. The data set used corresponds to an integrated luminosity of 3.2 fb-1. Many extensions of the Standard Model predict the existence of massive charged long-lived particles, such as R-hadrons. These massive particles are expected to be produced with a velocity significantly below the speed of light, and therefore to have a specific ionization higher than any Standard Model particle of unit charge at high momenta. The Pixel subsystem of the ATLAS detector is used to measure the ionization energy loss of reconstructed charged particles and to search for such highly ionizing particles. The search presented here has much greater sensitivity than a similar search performed using the ATLAS detector in the √s=8 TeV data set, thanks to the increase in expected signal cross section due to the higher center-of-mass energy of collisions, to an upgraded detector with a new silicon layer close to the interaction point, and to analysis improvements. No significant deviation from Standard Model background expectations is observed, and lifetime-dependent upper limits on R-hadron production cross sections and masses are set. Gluino R-hadrons with lifetimes above 0.4 ns and decaying to qq plus a 100 GeV neutralino are excluded at the 95% confidence level, with lower mass limit ranging between 740 and 1590 GeV. In the case of stable R-hadrons the lower mass limit at the 95% confidence level is 1570 GeV.
format Articulo
Articulo
author Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
author_facet Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
author_sort Alconada Verzini, María Josefina
title Search for metastable heavy charged particles with large ionization energy loss in pp collisions at √s =13 TeV using the ATLAS experiment
title_short Search for metastable heavy charged particles with large ionization energy loss in pp collisions at √s =13 TeV using the ATLAS experiment
title_full Search for metastable heavy charged particles with large ionization energy loss in pp collisions at √s =13 TeV using the ATLAS experiment
title_fullStr Search for metastable heavy charged particles with large ionization energy loss in pp collisions at √s =13 TeV using the ATLAS experiment
title_full_unstemmed Search for metastable heavy charged particles with large ionization energy loss in pp collisions at √s =13 TeV using the ATLAS experiment
title_sort search for metastable heavy charged particles with large ionization energy loss in pp collisions at √s =13 tev using the atlas experiment
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/86241
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