Search for contact interactions and large extra dimensions in the dilepton final state using proton-proton collisions at sqrt(s) = 8 TeV with the ATLAS detector

Tracey Berry, Graham Savage

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A search is conducted for non-resonant new phenomena in dielectron and dimuon final states, originating from either contact interactions (CI) or large extra dimensions (LED). The full LHC 2012 proton-proton collision dataset
at sqrt(s) = 8 TeV recorded by the ATLAS detector is used, corresponding to 20 fb-1. The invariant mass spectrum is used as a discriminating variable and for the first time in ATLAS CI searches, angular information is used to construct
a forward-backward asymmetry to increase the search sensitivity. Lower limits are set on the CI scale between 15:4 TeV and 26:3 TeV, and on the string scale MS for large extra spatial dimensions, from 3:2 TeV to 5:0 TeV. This 8 TeV result includes additional CI helicity models and LED formalism results to the 7 TeV ATLAS search.
Original languageEnglish
Pages (from-to)2394–2396
Number of pages3
JournalNuclear Physics B - Proceedings Supplements
Issue number3
Publication statusE-pub ahead of print - 31 May 2016

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