Search for first generation scalar leptoquarks in pp collisions at sqrt{s}=7 TeV with the ATLAS detector

Frederick Loebinger; Georges Aad; Alexander Oh; Darren Price; Brian Cox; Gareth Brown; Cinzia Da Via; Andrew Pilkington; Stephen Watts; Un-Ki Yang; Christian Schwanenberger; John Almond

doi:10.1016/j.physletb.2012.03.023, 10.1016/j.physletb.2012.02.004

Search for first generation scalar leptoquarks in pp collisions at sqrt{s}=7 TeV with the ATLAS detector

Frederick Loebinger, Georges Aad, Alexander Oh, Darren Price, Brian Cox, Gareth Brown, Cinzia Da Via, Andrew Pilkington, Stephen Watts, Un-Ki Yang, Christian Schwanenberger, John Almond

The University of Manchester

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

Abstract

We report a search for first generation scalar leptoquarks using 1.03fb−1 of proton–proton collisions data produced by the Large Hadron Collider at s=7TeV and recorded by the ATLAS experiment. Leptoquarks are sought via their decay into an electron or neutrino and a quark, producing events with two oppositely charged electrons and at least two jets, or events with an electron, missing transverse momentum and at least two jets. Control data samples are used to validate background predictions from Monte Carlo simulation. In the signal region, the observed event yields are consistent with the background expectations. We exclude at 95% confidence level the production of first generation scalar leptoquark with masses mLQ<660(607)GeV when assuming the branching fraction of a leptoquark to a charged lepton is equal to 1.0 (0.5).

Original language	English
Pages (from-to)	158-176
Number of pages	19
Journal	Phys.Lett.
Volume	B709
DOIs	https://doi.org/10.1016/j.physletb.2012.03.023, 10.1016/j.physletb.2012.02.004
Publication status	Published - 2012

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10.1016/j.physletb.2012.03.023, 10.1016/j.physletb.2012.02.004

Cite this

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title = "Search for first generation scalar leptoquarks in pp collisions at sqrt{s}=7 TeV with the ATLAS detector",

abstract = "We report a search for first generation scalar leptoquarks using 1.03fb−1 of proton–proton collisions data produced by the Large Hadron Collider at s=7TeV and recorded by the ATLAS experiment. Leptoquarks are sought via their decay into an electron or neutrino and a quark, producing events with two oppositely charged electrons and at least two jets, or events with an electron, missing transverse momentum and at least two jets. Control data samples are used to validate background predictions from Monte Carlo simulation. In the signal region, the observed event yields are consistent with the background expectations. We exclude at 95% confidence level the production of first generation scalar leptoquark with masses mLQ<660(607)GeV when assuming the branching fraction of a leptoquark to a charged lepton is equal to 1.0 (0.5).",

author = "Frederick Loebinger and Georges Aad and Alexander Oh and Darren Price and Brian Cox and Gareth Brown and {Da Via}, Cinzia and Andrew Pilkington and Stephen Watts and Un-Ki Yang and Christian Schwanenberger and John Almond",

year = "2012",

doi = "10.1016/j.physletb.2012.03.023, 10.1016/j.physletb.2012.02.004",

language = "English",

volume = "B709",

pages = "158--176",

journal = "Phys.Lett.",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Search for first generation scalar leptoquarks in pp collisions at sqrt{s}=7 TeV with the ATLAS detector

AU - Loebinger, Frederick

AU - Aad, Georges

AU - Oh, Alexander

AU - Price, Darren

AU - Cox, Brian

AU - Brown, Gareth

AU - Da Via, Cinzia

AU - Pilkington, Andrew

AU - Watts, Stephen

AU - Yang, Un-Ki

AU - Schwanenberger, Christian

AU - Almond, John

PY - 2012

Y1 - 2012

N2 - We report a search for first generation scalar leptoquarks using 1.03fb−1 of proton–proton collisions data produced by the Large Hadron Collider at s=7TeV and recorded by the ATLAS experiment. Leptoquarks are sought via their decay into an electron or neutrino and a quark, producing events with two oppositely charged electrons and at least two jets, or events with an electron, missing transverse momentum and at least two jets. Control data samples are used to validate background predictions from Monte Carlo simulation. In the signal region, the observed event yields are consistent with the background expectations. We exclude at 95% confidence level the production of first generation scalar leptoquark with masses mLQ<660(607)GeV when assuming the branching fraction of a leptoquark to a charged lepton is equal to 1.0 (0.5).

AB - We report a search for first generation scalar leptoquarks using 1.03fb−1 of proton–proton collisions data produced by the Large Hadron Collider at s=7TeV and recorded by the ATLAS experiment. Leptoquarks are sought via their decay into an electron or neutrino and a quark, producing events with two oppositely charged electrons and at least two jets, or events with an electron, missing transverse momentum and at least two jets. Control data samples are used to validate background predictions from Monte Carlo simulation. In the signal region, the observed event yields are consistent with the background expectations. We exclude at 95% confidence level the production of first generation scalar leptoquark with masses mLQ<660(607)GeV when assuming the branching fraction of a leptoquark to a charged lepton is equal to 1.0 (0.5).

U2 - 10.1016/j.physletb.2012.03.023, 10.1016/j.physletb.2012.02.004

DO - 10.1016/j.physletb.2012.03.023, 10.1016/j.physletb.2012.02.004

M3 - Article

VL - B709

SP - 158

EP - 176

JO - Phys.Lett.

JF - Phys.Lett.

ER -

Search for first generation scalar leptoquarks in pp collisions at sqrt{s}=7 TeV with the ATLAS detector

Abstract

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