Search for top squarks in events with a Higgs or Z boson using 139 fb−1 of pp collision data at √s = 13 TeV with the ATLAS detector

ATLAS Publications; T.M. Carter; M. Faucci Giannelli; A. Hasib; M.P. Heath; S. Palazzo; A. Søgaard; A. Strubig; E.P. Takeva; A.J. Taylor; N. Themistokleous; E.M. Villhauer

doi:10.1140/epjc/s10052-020-08469-8

Search for top squarks in events with a Higgs or Z boson using 139 fb−1 of pp collision data at √s = 13 TeV with the ATLAS detector

ATLAS Publications
, T.M. Carter
, M. Faucci Giannelli
, A. Hasib
, M.P. Heath
, S. Palazzo
, A. Søgaard
, A. Strubig
, E.P. Takeva
, A.J. Taylor
, N. Themistokleous
, E.M. Villhauer

School of Physics and Astronomy

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

Abstract

This paper presents a search for direct top squark pair production in events with missing transverse momentum plus either a pair of jets consistent with Standard Model Higgs boson decay into b-quarks or a same-flavour opposite-sign dilepton pair with an invariant mass consistent with a Z boson. The analysis is performed using the proton–proton collision data at √s = 13 TeV collected with the ATLAS detector during the LHC Run-2, corresponding to an integrated luminosity of 139 fb−1 . No excess is observed in the data above the Standard Model predictions. The results are interpreted in simplified models featuring direct production of pairs of either the lighter top squark (˜t1 ) or the heavier
top squark (˜t2 ), excluding at 95% confidence level ˜t1 and ˜t2 masses up to about 1220 and 875 GeV, respectively.

Original language	English
Article number	1080
Pages (from-to)	1-33
Number of pages	33
Journal	The European Physical Journal C
Volume	80
Issue number	11
DOIs	https://doi.org/10.1140/epjc/s10052-020-08469-8
Publication status	Published - 23 Nov 2020

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10.1140/epjc/s10052-020-08469-8Licence: Creative Commons: Attribution (CC-BY)

http://arxiv.org/abs/2006.05880

Upgrade of the ATLAS detector at the LHC (2023-26)
Clark, P. (Principal Investigator)
1/04/23 → 31/03/26
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
1/04/23 → 30/09/25
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
1/10/22 → 30/09/25
Project: Research

Cite this

ATLAS Publications, Carter, T. M., Faucci Giannelli, M., Hasib, A., Heath, M. P., Palazzo, S., Søgaard, A., Strubig, A., Takeva, E. P., Taylor, A. J., Themistokleous, N., & Villhauer, E. M. (2020). Search for top squarks in events with a Higgs or Z boson using 139 fb−1 of pp collision data at √s = 13 TeV with the ATLAS detector. The European Physical Journal C, 80(11), 1-33. Article 1080. https://doi.org/10.1140/epjc/s10052-020-08469-8

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title = "Search for top squarks in events with a Higgs or Z boson using 139 fb−1 of pp collision data at √s = 13 TeV with the ATLAS detector",

abstract = "This paper presents a search for direct top squark pair production in events with missing transverse momentum plus either a pair of jets consistent with Standard Model Higgs boson decay into b-quarks or a same-flavour opposite-sign dilepton pair with an invariant mass consistent with a Z boson. The analysis is performed using the proton–proton collision data at √s = 13 TeV collected with the ATLAS detector during the LHC Run-2, corresponding to an integrated luminosity of 139 fb−1 . No excess is observed in the data above the Standard Model predictions. The results are interpreted in simplified models featuring direct production of pairs of either the lighter top squark (˜t1 ) or the heavier top squark (˜t2 ), excluding at 95\% confidence level ˜t1 and ˜t2 masses up to about 1220 and 875 GeV, respectively.",

author = "\{ATLAS Publications\} and Clark, \{Philip James\} and Sinead Farrington and Yanyan Gao and Christos Leonidopoulos and Martin, \{Victoria Jane\} and Liza Mijovic and Benjamin Wynne and T.M. Carter and \{Faucci Giannelli\}, M. and A. Hasib and M.P. Heath and S. Palazzo and A. S{\o}gaard and A. Strubig and E.P. Takeva and A.J. Taylor and N. Themistokleous and E.M. Villhauer",

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doi = "10.1140/epjc/s10052-020-08469-8",

language = "English",

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ATLAS Publications, Carter, TM, Faucci Giannelli, M, Hasib, A, Heath, MP, Palazzo, S, Søgaard, A, Strubig, A, Takeva, EP, Taylor, AJ, Themistokleous, N & Villhauer, EM 2020, 'Search for top squarks in events with a Higgs or Z boson using 139 fb−1 of pp collision data at √s = 13 TeV with the ATLAS detector', The European Physical Journal C, vol. 80, no. 11, 1080, pp. 1-33. https://doi.org/10.1140/epjc/s10052-020-08469-8

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T1 - Search for top squarks in events with a Higgs or Z boson using 139 fb−1 of pp collision data at √s = 13 TeV with the ATLAS detector

AU - ATLAS Publications

AU - Clark, Philip James

AU - Farrington, Sinead

AU - Gao, Yanyan

AU - Leonidopoulos, Christos

AU - Martin, Victoria Jane

AU - Mijovic, Liza

AU - Wynne, Benjamin

AU - Carter, T.M.

AU - Faucci Giannelli, M.

AU - Hasib, A.

AU - Heath, M.P.

AU - Palazzo, S.

AU - Søgaard, A.

AU - Strubig, A.

AU - Takeva, E.P.

AU - Taylor, A.J.

AU - Themistokleous, N.

AU - Villhauer, E.M.

PY - 2020/11/23

Y1 - 2020/11/23

N2 - This paper presents a search for direct top squark pair production in events with missing transverse momentum plus either a pair of jets consistent with Standard Model Higgs boson decay into b-quarks or a same-flavour opposite-sign dilepton pair with an invariant mass consistent with a Z boson. The analysis is performed using the proton–proton collision data at √s = 13 TeV collected with the ATLAS detector during the LHC Run-2, corresponding to an integrated luminosity of 139 fb−1 . No excess is observed in the data above the Standard Model predictions. The results are interpreted in simplified models featuring direct production of pairs of either the lighter top squark (˜t1 ) or the heavier top squark (˜t2 ), excluding at 95% confidence level ˜t1 and ˜t2 masses up to about 1220 and 875 GeV, respectively.

AB - This paper presents a search for direct top squark pair production in events with missing transverse momentum plus either a pair of jets consistent with Standard Model Higgs boson decay into b-quarks or a same-flavour opposite-sign dilepton pair with an invariant mass consistent with a Z boson. The analysis is performed using the proton–proton collision data at √s = 13 TeV collected with the ATLAS detector during the LHC Run-2, corresponding to an integrated luminosity of 139 fb−1 . No excess is observed in the data above the Standard Model predictions. The results are interpreted in simplified models featuring direct production of pairs of either the lighter top squark (˜t1 ) or the heavier top squark (˜t2 ), excluding at 95% confidence level ˜t1 and ˜t2 masses up to about 1220 and 875 GeV, respectively.

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DO - 10.1140/epjc/s10052-020-08469-8

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EP - 33

JO - The European Physical Journal C

JF - The European Physical Journal C

IS - 11

M1 - 1080

ER -

Search for top squarks in events with a Higgs or Z boson using 139 fb−1 of pp collision data at √s = 13 TeV with the ATLAS detector

Abstract

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Projects

Upgrade of the ATLAS detector at the LHC (2023-26)

Experimental Particle Physics at the University of Edinburgh

Experimental Particle Physics at the University of Edinburgh

Cite this