Search for direct top squark pair production in events with a Z boson, b -jets and missing transverse momentum in s√=8 TeV pp collisions with the ATLAS detector

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Experimental Particle Physics

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art%3A10.1140%2Fepjc%2Fs10052-014-2883-6
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https://doi.org/10.1140/epjc/s10052-014-2883-6
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Search for direct top squark pair production in events with a Z boson, b -jets and missing transverse momentum in s√=8 TeV pp collisions with the ATLAS detector. / The ATLAS collaboration.
In: European Physical Journal C: Particles and Fields, Vol. 74, No. 6, 2883, 03.06.2014.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Bibtex

@article{96656dcbe73f403abfde5be9b365ac08,

title = "Search for direct top squark pair production in events with a Z boson, b -jets and missing transverse momentum in s√=8 TeV pp collisions with the ATLAS detector",

abstract = "A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum. The analysis is performed with proton–proton collision data at s√=8\ TeV collected with the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of 20.3 fb −1. No excess beyond the Standard Model expectation is observed. Interpretations of the results are provided in models based on the direct pair production of the heavier top squark state ( t~2) followed by the decay to the lighter top squark state ( t~1) via t~2→Zt~1, and for t~1 pair production in natural gauge-mediated supersymmetry breaking scenarios where the neutralino ( χ~01) is the next-to-lightest supersymmetric particle and decays producing a Z boson and a gravitino ( G~) via the χ~01→ZG~ process.",

author = "Lee Allison and Adam Barton and Guennadi Borissov and Eva Bouhova-Thacker and Alexandre Chilingarov and William Dearnaley and Harald Fox and Kathryn Grimm and Robert Henderson and Gareth Hughes and Jones, {Roger William Lewis} and Vakhtang Kartvelishvili and Robin Long and Peter Love and Harvey Maddocks and Maria Smizanska and James Walder and {The ATLAS collaboration}",

note = "EPJC is an open-access journal funded by SCOAP3 and licensed under CC BY 4.0",

year = "2014",

month = jun,

day = "3",

doi = "10.1140/epjc/s10052-014-2883-6",

language = "English",

volume = "74",

journal = "European Physical Journal C: Particles and Fields",

issn = "1434-6044",

publisher = "SPRINGER",

number = "6",

}

RIS

TY - JOUR

T1 - Search for direct top squark pair production in events with a Z boson, b -jets and missing transverse momentum in s√=8 TeV pp collisions with the ATLAS detector

AU - Allison, Lee

AU - Barton, Adam

AU - Borissov, Guennadi

AU - Bouhova-Thacker, Eva

AU - Chilingarov, Alexandre

AU - Dearnaley, William

AU - Fox, Harald

AU - Grimm, Kathryn

AU - Henderson, Robert

AU - Hughes, Gareth

AU - Jones, Roger William Lewis

AU - Kartvelishvili, Vakhtang

AU - Long, Robin

AU - Love, Peter

AU - Maddocks, Harvey

AU - Smizanska, Maria

AU - Walder, James

AU - The ATLAS collaboration

N1 - EPJC is an open-access journal funded by SCOAP3 and licensed under CC BY 4.0

PY - 2014/6/3

Y1 - 2014/6/3

N2 - A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum. The analysis is performed with proton–proton collision data at s√=8\ TeV collected with the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of 20.3 fb −1. No excess beyond the Standard Model expectation is observed. Interpretations of the results are provided in models based on the direct pair production of the heavier top squark state ( t~2) followed by the decay to the lighter top squark state ( t~1) via t~2→Zt~1, and for t~1 pair production in natural gauge-mediated supersymmetry breaking scenarios where the neutralino ( χ~01) is the next-to-lightest supersymmetric particle and decays producing a Z boson and a gravitino ( G~) via the χ~01→ZG~ process.

AB - A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum. The analysis is performed with proton–proton collision data at s√=8\ TeV collected with the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of 20.3 fb −1. No excess beyond the Standard Model expectation is observed. Interpretations of the results are provided in models based on the direct pair production of the heavier top squark state ( t~2) followed by the decay to the lighter top squark state ( t~1) via t~2→Zt~1, and for t~1 pair production in natural gauge-mediated supersymmetry breaking scenarios where the neutralino ( χ~01) is the next-to-lightest supersymmetric particle and decays producing a Z boson and a gravitino ( G~) via the χ~01→ZG~ process.

U2 - 10.1140/epjc/s10052-014-2883-6

DO - 10.1140/epjc/s10052-014-2883-6

M3 - Journal article

VL - 74

JO - European Physical Journal C: Particles and Fields

JF - European Physical Journal C: Particles and Fields

SN - 1434-6044

IS - 6

M1 - 2883

ER -

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