Search for contact interactions in dilepton events from pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

ATLAS Collaboration

doi:10.1016/j.physletb.2012.04.026

Search for contact interactions in dilepton events from pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

ATLAS Collaboration

Research output: Contribution to journal › Article › peer-review

Abstract

This Letter presents a search for contact interactions in the dielectron and dimuon channels using data from proton-proton collisions produced by the LHC at sqrt(s) = 7 TeV and recorded by the ATLAS detector. The data sample, collected in 2011, corresponds to an integrated luminosity of 1.08 and 1.21 fb^-1 in the e+ e- and mu+ mu- channels, respectively. No significant deviations from the standard model are observed. Using a Bayesian approach with a prior flat in 1/Lambda^2, the following 95% CL lower limits are placed on the energy scale of llqq contact interactions: Lambda^- > 10.1 TeV (Lambda^+ > 9.4 TeV) in the electron channel and Lambda^- > 8.0 TeV (Lambda^+ > 7.0 TeV) in the muon channel for constructive (destructive) interference in the left-left isoscalar contact interaction model. Limits are also provided for a prior flat in 1/Lambda^4.

Original language	English
Pages (from-to)	40-58
Number of pages	19
Journal	Phys. Lett.
Volume	712
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physletb.2012.04.026
Publication status	Published - 30 May 2012

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@article{2b07bdfe3d5449c4b7c6487e5638d65e,

title = "Search for contact interactions in dilepton events from pp collisions at sqrt(s) = 7 TeV with the ATLAS detector",

abstract = "This Letter presents a search for contact interactions in the dielectron and dimuon channels using data from proton-proton collisions produced by the LHC at sqrt(s) = 7 TeV and recorded by the ATLAS detector. The data sample, collected in 2011, corresponds to an integrated luminosity of 1.08 and 1.21 fb^-1 in the e+ e- and mu+ mu- channels, respectively. No significant deviations from the standard model are observed. Using a Bayesian approach with a prior flat in 1/Lambda^2, the following 95% CL lower limits are placed on the energy scale of llqq contact interactions: Lambda^- > 10.1 TeV (Lambda^+ > 9.4 TeV) in the electron channel and Lambda^- > 8.0 TeV (Lambda^+ > 7.0 TeV) in the muon channel for constructive (destructive) interference in the left-left isoscalar contact interaction model. Limits are also provided for a prior flat in 1/Lambda^4.",

author = "Alexander Oh and Darren Price and Andrew Pilkington and Stephen Watts and {Da Via}, Cinzia and Brian Cox and Terence Wyatt and Joleen Pater and {ATLAS Collaboration}",

year = "2012",

month = may,

day = "30",

doi = "10.1016/j.physletb.2012.04.026",

language = "English",

volume = "712",

pages = "40--58",

journal = "Phys. Lett.",

publisher = "Elsevier BV",

number = "1-2",

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TY - JOUR

T1 - Search for contact interactions in dilepton events from pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

AU - Oh, Alexander

AU - Price, Darren

AU - Pilkington, Andrew

AU - Watts, Stephen

AU - Da Via, Cinzia

AU - Cox, Brian

AU - Wyatt, Terence

AU - Pater, Joleen

AU - ATLAS Collaboration

PY - 2012/5/30

Y1 - 2012/5/30

N2 - This Letter presents a search for contact interactions in the dielectron and dimuon channels using data from proton-proton collisions produced by the LHC at sqrt(s) = 7 TeV and recorded by the ATLAS detector. The data sample, collected in 2011, corresponds to an integrated luminosity of 1.08 and 1.21 fb^-1 in the e+ e- and mu+ mu- channels, respectively. No significant deviations from the standard model are observed. Using a Bayesian approach with a prior flat in 1/Lambda^2, the following 95% CL lower limits are placed on the energy scale of llqq contact interactions: Lambda^- > 10.1 TeV (Lambda^+ > 9.4 TeV) in the electron channel and Lambda^- > 8.0 TeV (Lambda^+ > 7.0 TeV) in the muon channel for constructive (destructive) interference in the left-left isoscalar contact interaction model. Limits are also provided for a prior flat in 1/Lambda^4.

AB - This Letter presents a search for contact interactions in the dielectron and dimuon channels using data from proton-proton collisions produced by the LHC at sqrt(s) = 7 TeV and recorded by the ATLAS detector. The data sample, collected in 2011, corresponds to an integrated luminosity of 1.08 and 1.21 fb^-1 in the e+ e- and mu+ mu- channels, respectively. No significant deviations from the standard model are observed. Using a Bayesian approach with a prior flat in 1/Lambda^2, the following 95% CL lower limits are placed on the energy scale of llqq contact interactions: Lambda^- > 10.1 TeV (Lambda^+ > 9.4 TeV) in the electron channel and Lambda^- > 8.0 TeV (Lambda^+ > 7.0 TeV) in the muon channel for constructive (destructive) interference in the left-left isoscalar contact interaction model. Limits are also provided for a prior flat in 1/Lambda^4.

U2 - 10.1016/j.physletb.2012.04.026

DO - 10.1016/j.physletb.2012.04.026

M3 - Article

VL - 712

SP - 40

EP - 58

JO - Phys. Lett.

JF - Phys. Lett.

IS - 1-2

ER -

Search for contact interactions in dilepton events from pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

Abstract

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