Sneaky light stop

Eifert, Till; Nachman, Benjamin

doi:10.1016/j.physletb.2015.02.039

Title: Sneaky light stop

Journal Article · Fri Feb 20 00:00:00 EST 2015 · Physics Letters. B

DOI:https://doi.org/10.1016/j.physletb.2015.02.039· OSTI ID:1193016

Eifert, Till ^[1]; Nachman, Benjamin ^[2]

CERN (Switzerland)
Stanford Univ., CA (United States)

A light supersymmetric top quark partner (stop) with a mass nearly degenerate with that of the standard model (SM) top quark can evade direct searches. The precise measurement of SM top properties such as the cross-section has been suggested to give a handle for this ‘stealth stop’ scenario. We present an estimate of the potential impact a light stop may have on top quark mass measurements. The results indicate that certain light stop models may induce a bias of up to a few GeV, and that this effect can hide the shift in, and hence sensitivity from, cross-section measurements. Due to the different initial states, the size of the bias is slightly different between the LHC and the Tevatron. The studies make some simplifying assumptions for the top quark measurement technique, and are based on truth-level samples.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE; National Science Foundation (NSF); Stanford Univ.

Grant/Contract Number:: AC02-76SF00515; DGE-4747

OSTI ID:: 1193016

Journal Information:: Physics Letters. B, Vol. 743, Issue C; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 17 works

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Magnifying the ATLAS stealth stop splinter: impact of spin correlations and finite widths Cohen, Timothy; Hopkins, Walter; Majewski, Stephanie Journal of High Energy Physics, Vol. 2018, Issue 7 https://doi.org/10.1007/jhep07(2018)142	journal	July 2018
ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider Aad, G.; Abbott, B.; Abdallah, J. The European Physical Journal C, Vol. 75, Issue 10 https://doi.org/10.1140/epjc/s10052-015-3726-9	journal	October 2015
ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider Atlas, Collaboration; Beck, Hans Peter; Cervelli, Alberto EDP Sciences https://doi.org/10.7892/boris.87608	text	January 2015
Magnifying the ATLAS Stealth Stop Splinter: Impact of Spin Correlations and Finite Widths Cohen, Timothy; Hopkins, Walter; Majewski, Stephanie arXiv https://doi.org/10.48550/arxiv.1804.00111	text	January 2018
Light stop in the MSSM after LHC Run 1 Bélanger, Geneviève; Ghosh, Diptimoy; Godbole, Rohini Journal of High Energy Physics, Vol. 2015, Issue 9 https://doi.org/10.1007/jhep09(2015)214	journal	September 2015
Parameter inference from event ensembles and the top-quark mass Flesher, Forrest; Fraser, Katherine; Hutchison, Charles Journal of High Energy Physics, Vol. 2021, Issue 9 https://doi.org/10.1007/jhep09(2021)058	journal	September 2021
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Refining light stop exclusion limits with $W^+W^-$ cross sections Rolbiecki, Krzysztof; Tattersall, Jamie arXiv https://doi.org/10.48550/arxiv.1505.05523	text	January 2015
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