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

ATLAS Collaboration

doi:10.1103/PhysRevD.87.015010

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

ATLAS Collaboration

School of Physics and Astronomy

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

53 Scopus citations

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 language	English
Article number	015010
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	87
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevD.87.015010
State	Published - 4 Jan 2013

Funding

Funders	Funder number
National Science Foundation	1119200, 1206092
National Science Foundation
Seventh Framework Programme	246806
Seventh Framework Programme
Science and Technology Facilities Council	PP/E002757/1, PP/E000347/1, ST/H001069/2, ST/L001195/1, ST/H001042/1, ST/H001042/2, ST/J004928/1, ST/K001361/1, ST/L001004/1, GRIDPP, ST/K001310/1, ST/L00352X/1, ST/K001337/1, ST/J501074/1, ST/L001144/1, ST/L003112/1, ST/K000659/1, ST/K001248/1, ST/L003325/1, ST/M000761/1, ST/I505756/1, ST/H001093/2, ST/M001431/1, ST/K001418/1, ST/H001093/1, ST/K003496/1, ST/M001512/1, ST/K001388/1, PP/E000487/1, ST/F007418/1, PP/E003699/2, PP/E003699/1, ST/K000713/1, ST/K50208X/1, ST/F007337/1, ST/I005803/1, ST/J004944/1, ST/K501840/1, ST/H001026/1, ST/I006080/1, ST/I000186/1, ST/G502320/1, ST/K003437/1, ST/M000664/1, ST/H00100X/1, ST/L000970/1, ST/K00073X/1, ST/H00100X/2, ST/K000705/1, ST/I005811/1, ST/J005541/1, PP/E003087/1, ST/J005460/1, PP/E000355/1, ST/J004936/1, ST/K00140X/1, ST/M001474/1, ST/F00754X/1, ST/I003525/1, ST/K003658/1, ST/H00095X/2, ST/H00095X/1, ST/H001026/2, ST/J005576/1
Science and Technology Facilities Council
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung	144493
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

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10.1103/PhysRevD.87.015010

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@article{b5eb3ae319674ce988f38b60ea7ec9b1,

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

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.",

author = "{ATLAS Collaboration} and G. Aad and T. Abajyan and B. Abbott and J. Abdallah and {Abdel Khalek}, S. and Abdelalim, {A. A.} and O. Abdinov and R. Aben and B. Abi and M. Abolins and Abouzeid, {O. S.} and H. Abramowicz and H. Abreu and Acharya, {B. S.} and L. Adamczyk and Adams, {D. L.} and Addy, {T. N.} and J. Adelman and S. Adomeit and P. Adragna and T. Adye and S. Aefsky and Aguilar-Saavedra, {J. A.} and M. Agustoni and M. Aharrouche and Ahlen, {S. P.} and F. Ahles and A. Ahmad and M. Ahsan and G. Aielli and {\AA}kesson, {T. P.A.} and G. Akimoto and Akimov, {A. V.} and Alam, {M. S.} and Alam, {M. A.} and J. Albert and S. Albrand and M. Aleksa and Aleksandrov, {I. N.} and F. Alessandria and C. Alexa and G. Alexander and G. Alexandre and T. Alexopoulos and L. Barak and G. Bella and Y. Benhammou and E. Etzion and Y. Oren and A. Soffer",

note = "Publisher Copyright: {\textcopyright} 2013 CERN",

year = "2013",

month = jan,

day = "4",

doi = "10.1103/PhysRevD.87.015010",

language = "אנגלית",

volume = "87",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

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T1 - Search for contact interactions and large extra dimensions in dilepton events from pp collisions at √s=7 TeV with the ATLAS detector

AU - ATLAS Collaboration

AU - Aad, G.

AU - Abajyan, T.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdel Khalek, S.

AU - Abdelalim, A. A.

AU - Abdinov, O.

AU - Aben, R.

AU - Abi, B.

AU - Abolins, M.

AU - Abouzeid, O. S.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Acharya, B. S.

AU - Adamczyk, L.

AU - Adams, D. L.

AU - Addy, T. N.

AU - Adelman, J.

AU - Adomeit, S.

AU - Adragna, P.

AU - Adye, T.

AU - Aefsky, S.

AU - Aguilar-Saavedra, J. A.

AU - Agustoni, M.

AU - Aharrouche, M.

AU - Ahlen, S. P.

AU - Ahles, F.

AU - Ahmad, A.

AU - Ahsan, M.

AU - Aielli, G.

AU - Åkesson, T. P.A.

AU - Akimoto, G.

AU - Akimov, A. V.

AU - Alam, M. S.

AU - Alam, M. A.

AU - Albert, J.

AU - Albrand, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alessandria, F.

AU - Alexa, C.

AU - Alexander, G.

AU - Alexandre, G.

AU - Alexopoulos, T.

AU - Barak, L.

AU - Bella, G.

AU - Benhammou, Y.

AU - Etzion, E.

AU - Oren, Y.

AU - Soffer, A.

PY - 2013/1/4

Y1 - 2013/1/4

N2 - 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.

AB - 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.

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U2 - 10.1103/PhysRevD.87.015010

DO - 10.1103/PhysRevD.87.015010

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AN - SCOPUS:84872344345

SN - 1550-7998

VL - 87

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 1

M1 - 015010

ER -

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

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Funding

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