Search for New Physics in Dijet Mass and Angular Distributions in 36 pb-1 of pp Collisions at sqrt(s) = 7 TeV Measured with the ATLAS Detector

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Abstract

A search for new interactions and resonances produced in LHC proton-proton (pp) collisions at a centre-of-mass energy sqrt(s)= 7 TeV has been performed with the ATLAS detector. Using a data set with an integrated luminosity of 36 pb-1 dijet mass and angular distributions have been measured up to dijet masses of sim 3.5 TeV and found to be in good agreement with Standard Model predictions. This analysis sets limits at 95% C.L. on various models for new physics: an excited quark is excluded with mass between 0.60 and 2.64 TeV, an axigluon hypothesis is excluded for axigluon masses between 0.60 and 2.10 TeV and Randall-Meade quantum black holes are excluded in models with six extra space-time dimensions for quantum gravity scales between 0.75 and 3.67 TeV. Production cross section limits as a function of dijet mass are set using a simplified Gaussian signal model to facilitate comparisons with other hypotheses. Analysis of the dijet angular distribution using a novel technique 18 simultaneously employing the dijet mass excludes quark contact interactions with a compositeness scale {Lambda} below 9.5 TeV.

Autore Pugliese

Tutti gli autori

  • G. AAD , M. BIANCO , G. CHIODINI , M. R. COLUCCIA , E. GORINI , M. PRIMAVERA , S. SPAGNOLO , A. VENTURA , ET AL.

Titolo volume/Rivista

NEW JOURNAL OF PHYSICS

Anno di pubblicazione

2011

ISSN

1367-2630

ISBN

Non Disponibile

Numero di citazioni Wos

63

Ultimo Aggiornamento Citazioni

28/04/2018

Numero di citazioni Scopus

95

Ultimo Aggiornamento Citazioni

28/04/2018

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile