CERN Accelerating science

ATLAS Note
Report number	ATL-PHYS-PROC-2013-017
Title	Search for New Phenomena in the Dijet Mass Distribution updated using 13.0 fb$^{-1}$ of $pp$ Collisions at $\sqrt{s}$ = 8 TeV collected by the ATLAS Detector
Author(s)	Guescini, F (Geneva U.)
Corporate Author(s)	The ATLAS collaboration
Publication	2013
Imprint	28 Jan 2013
Number of pages	mult.
In:	Hadron Collider Physics Symposium 2012, Kyoto, Japan, 12 - 16 Nov 2012
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	exotics ; dijet ; mass ; EXOTICS
Abstract	The invariant mass distributions of dijet events produced in $pp$ collisions at a center of mass energy of 8 TeV by the LHC has been studied using the ATLAS detector. A total integrated luminosity of 13.0 fb$^{-1}$ collected in 2012 has been employed. The observed dijet masses extend up to 4.69 TeV. No local excesses have been observed. A 95% C.L. limit on the production of a benchmark model of excited quarks, q*, has been set at 3.84 TeV. The previous ATLAS 95% C.L. limit on q* mass using 5.8 fb$^{-1}$ of 2012 data was set at 3.66 TeV. Limits on cross section times acceptance, $\sigma\times$A, have also been updated using simplified gaussian models in order to allow limit setting on new theories.
Copyright/License	Preprint: (License: CC-BY-4.0)