Measurement of the flavour composition of dijet events in pp collisions at s√=7 TeV with the ATLAS detector

This paper describes a measurement of the flavour composition of dijet events produced in pp collisions at s√=7~TeV using the ATLAS detector. The measurement uses the full 2010 data sample, corresponding to an integrated luminosity of 39 pb⁻¹. Six possible combinations of light, charm and bottom je...

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Autores principales: Alonso, Francisco, Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Tripiana, Martín Fernando, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/127134
Aporte de:
id I19-R120-10915-127134
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Rapidity
Particle physics
Jet (fluid)
Physics
Gluon
Flavour
Nuclear physics
Luminosity (scattering theory)
Hadron
Charm (quantum number)
spellingShingle Física
Rapidity
Particle physics
Jet (fluid)
Physics
Gluon
Flavour
Nuclear physics
Luminosity (scattering theory)
Hadron
Charm (quantum number)
Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
Measurement of the flavour composition of dijet events in pp collisions at s√=7 TeV with the ATLAS detector
topic_facet Física
Rapidity
Particle physics
Jet (fluid)
Physics
Gluon
Flavour
Nuclear physics
Luminosity (scattering theory)
Hadron
Charm (quantum number)
description This paper describes a measurement of the flavour composition of dijet events produced in pp collisions at s√=7~TeV using the ATLAS detector. The measurement uses the full 2010 data sample, corresponding to an integrated luminosity of 39 pb⁻¹. Six possible combinations of light, charm and bottom jets are identified in the dijet events, where the jet flavour is defined by the presence of bottom, charm or solely light flavour hadrons in the jet. Kinematic variables, based on the properties of displaced decay vertices and optimised for jet flavour identification, are used in a multidimensional template fit to measure the fractions of these dijet flavour states as functions of the leading jet transverse momentum in the range 40 GeV to 500 GeV and jet rapidity |y| < 2.1. The fit results agree with the predictions of leading- and next-to-leading-order calculations, with the exception of the dijet fraction composed of bottom and light flavour jets, which is underestimated by all models at large transverse jet momenta. The ability to identify jets containing two b-hadrons, originating from e.g. gluon splitting, is demonstrated. The difference between bottom jet production rates in leading and subleading jets is consistent with the next-to-leading-order predictions.
format Articulo
Articulo
author Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
author_facet Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
author_sort Alonso, Francisco
title Measurement of the flavour composition of dijet events in pp collisions at s√=7 TeV with the ATLAS detector
title_short Measurement of the flavour composition of dijet events in pp collisions at s√=7 TeV with the ATLAS detector
title_full Measurement of the flavour composition of dijet events in pp collisions at s√=7 TeV with the ATLAS detector
title_fullStr Measurement of the flavour composition of dijet events in pp collisions at s√=7 TeV with the ATLAS detector
title_full_unstemmed Measurement of the flavour composition of dijet events in pp collisions at s√=7 TeV with the ATLAS detector
title_sort measurement of the flavour composition of dijet events in pp collisions at s√=7 tev with the atlas detector
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/127134
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AT theatlascollaboration measurementoftheflavourcompositionofdijeteventsinppcollisionsats7tevwiththeatlasdetector
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