A search for ttbar resonances in the dilepton channel in 1.04/fb of pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

Details A search for ttbar resonances in the dilepton channel in 1.04/fb of pp collisions at sqrt(s) = 7 TeV with the ATLAS detector A search for ttbar resonances in the dilepton channel in 1.04/fb of pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

2012-02-03

arxiv.org/abs/1202.0653v1

Physics

High Energy Physics

High Energy Physics - Experiment

"Presented at the 2011 Hadron Collider Physics symposium (HCP-2011), Paris, France, November 14-18 2011, 3 pages, 4 figures. "

Scientific paper

The first ATLAS result on a search for a high mass top pair resonance at the LHC, in the subset of events where both W bosons from the top decays decay to either a final state electron or muon, is presented. The analysis is performed on 1.04/fb of pp collisions at sqrt(s) = 7 TeV. Numerous models predict the production of new massive particles that decay preferentially to a top-anti-top pair, including Randall-Sundrum models where the observation of a Kaluza-Klein excitation of the gluon may be the first indication of the existence of an extra spatial dimension. In the analysis presented, a simple observable, sensitive to resonance mass, is formed by summing the missing transverse energy, and the transverse momenta of the selected jets and the two candidate leptons. A deviation from the Standard Model prediction for this observable is searched for using Bayesian statistical methods that compare the yields, and shapes, of the Standard Model background and signal predictions for KK-gluons with masses between 500 and 1600 GeV. No excess over the Standard Model is observed and 95% C.L. upper limits are set on the production cross-section times branching ratio to top quarks for KK-gluon-like resonances. The results of the analysis exclude Randall-Sundrum KK-gluons with masses less than 840 GeV.

Affiliated with

Also associated with

No associations

Rating

A search for ttbar resonances in the dilepton channel in 1.04/fb of pp collisions at sqrt(s) = 7 TeV with the ATLAS detector does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A search for ttbar resonances in the dilepton channel in 1.04/fb of pp collisions at sqrt(s) = 7 TeV with the ATLAS detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A search for ttbar resonances in the dilepton channel in 1.04/fb of pp collisions at sqrt(s) = 7 TeV with the ATLAS detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-4486