Search for contact interactions and large extra dimensions in dilepton events from pp collisions at √s=7 TeV with the ATLAS detector

ATLAS Collaboration

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

A search for nonresonant new phenomena, originating from either contact interactions or large extra spatial dimensions, has been carried out using events with two isolated electrons or muons. These events, produced at the LHC in proton-proton collisions at √s=7 TeV, were recorded by the ATLAS detector. The data sample, collected throughout 2011, corresponds to an integrated luminosity of 4.9 and 5.0 fb-1 in the e+e - and μ+μ- channels, respectively. No significant deviations from the Standard Model expectation are observed. Using a Bayesian approach, 95% confidence level lower limits ranging from 9.0 to 13.9 TeV are placed on the energy scale of ℓℓqq contact interactions in the left-left isoscalar model. Lower limits ranging from 2.4 to 3.9 TeV are also set on the string scale in large extra dimension models. After combining these limits with results from a similar search in the diphoton channel, slightly more stringent limits are obtained.

Original languageEnglish
Article number015010
JournalPhysical Review D
Volume87
Issue number1
DOIs
Publication statusPublished - Jan 4 2013
Externally publishedYes

Fingerprint

Extra Dimensions
electric contacts
Collision
Detector
Contact
collisions
detectors
Interaction
interactions
protons
Confidence Level
Bayesian Approach
Standard Model
muons
confidence
strings
Deviation
Strings
luminosity
Electron

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Mathematical Physics
  • Physics and Astronomy(all)

Cite this

Search for contact interactions and large extra dimensions in dilepton events from pp collisions at √s=7 TeV with the ATLAS detector. / ATLAS Collaboration.

In: Physical Review D, Vol. 87, No. 1, 015010, 04.01.2013.

Research output: Contribution to journalArticle

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