A search for prompt lepton-jets in pp collisions at root s=7 TeV with the ATLAS detector

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Abstract

We present a search for a light (mass < 2 GeV) boson predicted by Hidden Valley supersymmetric models that decays into a final state consisting of collimated muons or electrons, denoted "lepton-jets". The analysis uses 5 fb(-1) of root s = 7 TeV proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider to search for the following signatures: single lepton-jets with at least four muons; pairs of lepton-jets, each with two or more muons; and pairs of lepton-jets with two or more electrons. This study finds no statistically significant deviation from the Standard Model prediction and places 95% confidence-level exclusion limits on the production cross section times branching ratio of light bosons for several parameter sets of a Hidden Valley model.
Original languageEnglish
Pages (from-to)299-317
JournalPhysics Letters B
Volume719
Issue number4-5
DOIs
Publication statusPublished - 1 Jan 2013

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leptons
muons
collisions
detectors
valleys
bosons
protons
exclusion
confidence
electrons
signatures
deviation
cross sections
decay
predictions

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    @article{62125aac013d48ed9914f617f8350a07,
    title = "A search for prompt lepton-jets in pp collisions at root s=7 TeV with the ATLAS detector",
    abstract = "We present a search for a light (mass < 2 GeV) boson predicted by Hidden Valley supersymmetric models that decays into a final state consisting of collimated muons or electrons, denoted {"}lepton-jets{"}. The analysis uses 5 fb(-1) of root s = 7 TeV proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider to search for the following signatures: single lepton-jets with at least four muons; pairs of lepton-jets, each with two or more muons; and pairs of lepton-jets with two or more electrons. This study finds no statistically significant deviation from the Standard Model prediction and places 95{\%} confidence-level exclusion limits on the production cross section times branching ratio of light bosons for several parameter sets of a Hidden Valley model.",
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    author = "Wemans, {Andr{\'e} Jo{\~a}o Maur{\'i}cio Leit{\~a}o do Valle} and {ATLAS Collaboration}",
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    A search for prompt lepton-jets in pp collisions at root s=7 TeV with the ATLAS detector. / Wemans, André João Maurício Leitão do Valle; ATLAS Collaboration.

    In: Physics Letters B, Vol. 719, No. 4-5, 01.01.2013, p. 299-317.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - A search for prompt lepton-jets in pp collisions at root s=7 TeV with the ATLAS detector

    AU - Wemans, André João Maurício Leitão do Valle

    AU - ATLAS Collaboration

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    AB - We present a search for a light (mass < 2 GeV) boson predicted by Hidden Valley supersymmetric models that decays into a final state consisting of collimated muons or electrons, denoted "lepton-jets". The analysis uses 5 fb(-1) of root s = 7 TeV proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider to search for the following signatures: single lepton-jets with at least four muons; pairs of lepton-jets, each with two or more muons; and pairs of lepton-jets with two or more electrons. This study finds no statistically significant deviation from the Standard Model prediction and places 95% confidence-level exclusion limits on the production cross section times branching ratio of light bosons for several parameter sets of a Hidden Valley model.

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