Search for a scalar partner of the top quark in the jets plus missing transverse momentum final state at   s√=13  TeV with the ATLAS detector

ATLAS Collaboration

doi:10.1007/JHEP12(2017)085

Search for a scalar partner of the top quark in the jets plus missing transverse momentum final state at s√=13 TeV with the ATLAS detector

ATLAS Collaboration

Physics and Astronomy

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

60 Citations (Scopus)

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Abstract

A search for pair production of a scalar partner of the top quark in events with four or more jets plus missing transverse momentum is presented. An analysis of 36.1 fb−1 of s√=13 TeV proton-proton collisions collected using the ATLAS detector at the LHC yields no significant excess over the expected Standard Model background. To interpret the results a simplified supersymmetric model is used where the top squark is assumed to decay via t~1→t(∗)χ~01 and t~1→bχ~±1→bW(∗)χ~01 , where χ 1 0 (χ 1 ± ) denotes the lightest neutralino (chargino). Exclusion limits are placed in terms of the top-squark and neutralino masses. Assuming a branching ratio of 100% to tχ~01 , top-squark masses in the range 450–1000 GeV are excluded for χ~01 masses below 160 GeV. In the case where mt~1∼mt+mχ~01 , top-squark masses in the range 235–590 GeV are excluded.

Original language	English
Article number	085
Journal	JHEP
Volume	12
DOIs	https://doi.org/10.1007/JHEP12(2017)085
Publication status	Published - 15 Dec 2017

Bibliographical note

57 pages in total, author list starts on page 40, 12 figures, 14 tables, submitted to JHEP, all figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2016-15

Keywords

hep-ex

Access to Document

10.1007/JHEP12(2017)085Licence: Creative Commons: Attribution (CC BY)

ATLAS_Search_for_a_scalar_partner_of~-the_top_quark_JHEP_2018
Checked for eligibility 05/12/2018 https://doi.org/10.1007/JHEP12(2017)085
Final published version, 1.2 MBLicence: Creative Commons: Attribution (CC BY)

https://link.springer.com/article/10.1007%2FJHEP12%282017%29085Licence: Creative Commons: Attribution (CC BY)

Cite this

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title = "Search for a scalar partner of the top quark in the jets plus missing transverse momentum final state at s√=13 TeV with the ATLAS detector",

abstract = "A search for pair production of a scalar partner of the top quark in events with four or more jets plus missing transverse momentum is presented. An analysis of 36.1 fb−1 of s√=13 TeV proton-proton collisions collected using the ATLAS detector at the LHC yields no significant excess over the expected Standard Model background. To interpret the results a simplified supersymmetric model is used where the top squark is assumed to decay via t~1→t(∗)χ~01 and t~1→bχ~±1→bW(∗)χ~01 , where χ 1 0 (χ 1 ± ) denotes the lightest neutralino (chargino). Exclusion limits are placed in terms of the top-squark and neutralino masses. Assuming a branching ratio of 100% to tχ~01 , top-squark masses in the range 450–1000 GeV are excluded for χ~01 masses below 160 GeV. In the case where mt~1∼mt+mχ~01 , top-squark masses in the range 235–590 GeV are excluded.",

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author = "{ATLAS Collaboration} and Paul Newman",

note = "57 pages in total, author list starts on page 40, 12 figures, 14 tables, submitted to JHEP, all figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2016-15",

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AU - ATLAS Collaboration

A2 - Newman, Paul

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PY - 2017/12/15

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N2 - A search for pair production of a scalar partner of the top quark in events with four or more jets plus missing transverse momentum is presented. An analysis of 36.1 fb−1 of s√=13 TeV proton-proton collisions collected using the ATLAS detector at the LHC yields no significant excess over the expected Standard Model background. To interpret the results a simplified supersymmetric model is used where the top squark is assumed to decay via t~1→t(∗)χ~01 and t~1→bχ~±1→bW(∗)χ~01 , where χ 1 0 (χ 1 ± ) denotes the lightest neutralino (chargino). Exclusion limits are placed in terms of the top-squark and neutralino masses. Assuming a branching ratio of 100% to tχ~01 , top-squark masses in the range 450–1000 GeV are excluded for χ~01 masses below 160 GeV. In the case where mt~1∼mt+mχ~01 , top-squark masses in the range 235–590 GeV are excluded.

AB - A search for pair production of a scalar partner of the top quark in events with four or more jets plus missing transverse momentum is presented. An analysis of 36.1 fb−1 of s√=13 TeV proton-proton collisions collected using the ATLAS detector at the LHC yields no significant excess over the expected Standard Model background. To interpret the results a simplified supersymmetric model is used where the top squark is assumed to decay via t~1→t(∗)χ~01 and t~1→bχ~±1→bW(∗)χ~01 , where χ 1 0 (χ 1 ± ) denotes the lightest neutralino (chargino). Exclusion limits are placed in terms of the top-squark and neutralino masses. Assuming a branching ratio of 100% to tχ~01 , top-squark masses in the range 450–1000 GeV are excluded for χ~01 masses below 160 GeV. In the case where mt~1∼mt+mχ~01 , top-squark masses in the range 235–590 GeV are excluded.

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