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

G. Aad; T. Abajyan; B. Abbott; J. Abdallah; S.A. Khalek; Mogens Dam; Jørgen Beck Hansen; Peter Henrik Hansen; John Renner Hansen; Jørn Dines Hansen; Simon Johann Franz Heisterkamp; Nele Maria Philomena Boelaert; Morten Dam Jørgensen; Esben Bryndt Klinkby; Ask Emil Løvschall-Jensen; Sascha Mehlhase; Björn Stefan Nilsson; Troels Christian Petersen; Stefania Xella

doi:10.1103/PhysRevD.87.015010

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

G. Aad, T. Abajyan, B. Abbott, J. Abdallah, S.A. Khalek, Mogens Dam, Jørgen Beck Hansen, Peter Henrik Hansen, John Renner Hansen, Jørn Dines Hansen, Simon Johann Franz Heisterkamp, Nele Maria Philomena Boelaert, Morten Dam Jørgensen, Esben Bryndt Klinkby, Ask Emil Løvschall-Jensen, Sascha Mehlhase, Björn Stefan Nilsson, Troels Christian Petersen, Stefania Xella

Eksperimentel subatomar fysik

47 Citationer (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.

Originalsprog	Engelsk
Artikelnummer	015010
Tidsskrift	Physical Review D (Particles, Fields, Gravitation and Cosmology)
Vol/bind	87
Udgave nummer	1
ISSN	1550-7998
DOI	https://doi.org/10.1103/PhysRevD.87.015010
Status	Udgivet - 4 jan. 2013

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10.1103/PhysRevD.87.015010

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Aad, G., Abajyan, T., Abbott, B., Abdallah, J., Khalek, S. A., Dam, M., Hansen, J. B., Hansen, P. H., Hansen, J. R., Hansen, J. D., Heisterkamp, S. J. F., Boelaert, N. M. P., Jørgensen, M. D., Klinkby, E. B., Løvschall-Jensen, A. E., Mehlhase, S., Nilsson, B. S., Petersen, T. C., & Xella, S. (2013). Search for contact interactions and large extra dimensions in dilepton events from pp collisions at root s=7 TeV with the ATLAS detector. Physical Review D (Particles, Fields, Gravitation and Cosmology), 87(1), Artikel 015010. https://doi.org/10.1103/PhysRevD.87.015010

Search for contact interactions and large extra dimensions in dilepton events from pp collisions at root s=7 TeV with the ATLAS detector. / Aad, G.; Abajyan, T.; Abbott, B. et al.
I: Physical Review D (Particles, Fields, Gravitation and Cosmology), Bind 87, Nr. 1, 015010, 04.01.2013.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

Aad, G, Abajyan, T, Abbott, B, Abdallah, J, Khalek, SA, Dam, M , Hansen, JB , Hansen, PH , Hansen, JR , Hansen, JD, Heisterkamp, SJF, Boelaert, NMP, Jørgensen, MD, Klinkby, EB, Løvschall-Jensen, AE, Mehlhase, S, Nilsson, BS, Petersen, TC & Xella, S 2013, 'Search for contact interactions and large extra dimensions in dilepton events from pp collisions at root s=7 TeV with the ATLAS detector', Physical Review D (Particles, Fields, Gravitation and Cosmology), bind 87, nr. 1, 015010. https://doi.org/10.1103/PhysRevD.87.015010

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title = "Search for contact interactions and large extra dimensions in dilepton events from pp collisions at root 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 = "G. Aad and T. Abajyan and B. Abbott and J. Abdallah and S.A. Khalek and Mogens Dam and Hansen, {J{\o}rgen Beck} and Hansen, {Peter Henrik} and Hansen, {John Renner} and Hansen, {J{\o}rn Dines} and Heisterkamp, {Simon Johann Franz} and Boelaert, {Nele Maria Philomena} and J{\o}rgensen, {Morten Dam} and Klinkby, {Esben Bryndt} and L{\o}vschall-Jensen, {Ask Emil} and Sascha Mehlhase and Nilsson, {Bj{\"o}rn Stefan} and Petersen, {Troels Christian} and Stefania Xella",

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AU - Khalek, S.A.

AU - Dam, Mogens

AU - Hansen, Jørgen Beck

AU - Hansen, Peter Henrik

AU - Hansen, John Renner

AU - Hansen, Jørn Dines

AU - Heisterkamp, Simon Johann Franz

AU - Boelaert, Nele Maria Philomena

AU - Jørgensen, Morten Dam

AU - Klinkby, Esben Bryndt

AU - Løvschall-Jensen, Ask Emil

AU - Mehlhase, Sascha

AU - Nilsson, Björn Stefan

AU - Petersen, Troels Christian

AU - Xella, Stefania

PY - 2013/1/4

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

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

Abstract

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