Prompt signals and displaced vertices in sparticle searches for next-to-minimal gauge-mediated supersymmetric models

Allanach, B. C.; Badziak, Marcin; Cottin, Giovanna; Desai, Nishita; Hugonie, Cyril; Ziegler, Robert

doi:10.1140/epjc/s10052-016-4330-3

Title: Prompt signals and displaced vertices in sparticle searches for next-to-minimal gauge-mediated supersymmetric models

Abstract

Here, we study the LHC phenomenology of the next-to-minimal model of gauge-mediated supersymmetry breaking, both for Run I and Run II. The Higgs phenomenology of the model is consistent with observations: a 125 GeV standard model-like Higgs which mixes with singlet-like state of mass around 90 GeV that provides a 2 \sigma excess at LEP II. The model possesses regions of parameter space where a longer-lived lightest neutralino decays in the detector into a gravitino and a b-jet pair or a tau pair resulting in potential displaced vertex signatures. We investigate current bounds on sparticle masses and the discovery potential of the model, both via conventional searches and via searches for displaced vertices. The searches based on promptly decaying sparticles currently give a lower limit on the gluino mass 1080 GeV and could be sensitive up to 1900 GeV with 100 fb ^-1, whereas the current displaced vertex searches cannot probe this model due to b-quarks in the final state. We also show how the displaced vertex cuts might be relaxed in order to improve signal efficiency, while simultaneously applied prompt cuts reduce background, resulting in a much better sensitivity than either strategy alone and motivating a fully fledged experimentalmore » study.« less

Authors:: Allanach, B. C.; Badziak, Marcin; Cottin, Giovanna; Desai, Nishita; Hugonie, Cyril; Ziegler, Robert

Publication Date:: Thu Sep 01 00:00:00 EDT 2016

Research Org.:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1315851

Alternate Identifier(s):: OSTI ID: 1414763

Grant/Contract Number:: AC02-05CH11231

Resource Type:: Published Article

Journal Name:: European Physical Journal. C, Particles and Fields

Additional Journal Information:: Journal Name: European Physical Journal. C, Particles and Fields Journal Volume: 76 Journal Issue: 9; Journal ID: ISSN 1434-6044

Publisher:: Springer Science + Business Media

Country of Publication:: Germany

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Allanach, B. C., Badziak, Marcin, Cottin, Giovanna, Desai, Nishita, Hugonie, Cyril, and Ziegler, Robert. Prompt signals and displaced vertices in sparticle searches for next-to-minimal gauge-mediated supersymmetric models.  Germany: N. p., 2016. 
Web.  doi:10.1140/epjc/s10052-016-4330-3.

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                    Allanach, B. C., Badziak, Marcin, Cottin, Giovanna, Desai, Nishita, Hugonie, Cyril, & Ziegler, Robert. Prompt signals and displaced vertices in sparticle searches for next-to-minimal gauge-mediated supersymmetric models.  Germany.  https://doi.org/10.1140/epjc/s10052-016-4330-3

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                    Allanach, B. C., Badziak, Marcin, Cottin, Giovanna, Desai, Nishita, Hugonie, Cyril, and Ziegler, Robert. Thu .  
"Prompt signals and displaced vertices in sparticle searches for next-to-minimal gauge-mediated supersymmetric models".  Germany.  https://doi.org/10.1140/epjc/s10052-016-4330-3.

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@article{osti_1315851,

  title        = {Prompt signals and displaced vertices in sparticle searches for next-to-minimal gauge-mediated supersymmetric models},

  author       = {Allanach, B. C. and Badziak, Marcin and Cottin, Giovanna and Desai, Nishita and Hugonie, Cyril and Ziegler, Robert},

  abstractNote = {Here, we study the LHC phenomenology of the next-to-minimal model of gauge-mediated supersymmetry breaking, both for Run I and Run II. The Higgs phenomenology of the model is consistent with observations: a 125 GeV standard model-like Higgs which mixes with singlet-like state of mass around 90 GeV that provides a 2 \sigma excess at LEP II. The model possesses regions of parameter space where a longer-lived lightest neutralino decays in the detector into a gravitino and a b-jet pair or a tau pair resulting in potential displaced vertex signatures. We investigate current bounds on sparticle masses and the discovery potential of the model, both via conventional searches and via searches for displaced vertices. The searches based on promptly decaying sparticles currently give a lower limit on the gluino mass 1080 GeV and could be sensitive up to 1900 GeV with 100 fb -1, whereas the current displaced vertex searches cannot probe this model due to b-quarks in the final state. We also show how the displaced vertex cuts might be relaxed in order to improve signal efficiency, while simultaneously applied prompt cuts reduce background, resulting in a much better sensitivity than either strategy alone and motivating a fully fledged experimental study.},

  doi          = {10.1140/epjc/s10052-016-4330-3},

  journal      = {European Physical Journal. C, Particles and Fields},

  number       = 9,

  volume       = 76,

  place        = {Germany},

  year         = {Thu Sep 01 00:00:00 EDT 2016},

  month        = {Thu Sep 01 00:00:00 EDT 2016}

}

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Works referenced in this record:

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Title: Prompt signals and displaced vertices in sparticle searches for next-to-minimal gauge-mediated supersymmetric models

Abstract

Citation Formats

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journal, May 2014

Higgs mediation with strong hidden sector dynamics
journal, August 2014

Surveying extended GMSB models with m h = 125 GeV
journal, August 2013

On messengers couplings in extended GMSB models
journal, September 2013

Long-lived staus and displaced leptons at the LHC
journal, April 2016

Summary of the searches for squarks and gluinos using s = 8 $$ \sqrt{s}=8 $$ TeV pp collisions with the ATLAS experiment at the LHC
journal, October 2015

Focus point supersymmetry in extended gauge mediation
journal, March 2014

Summary of the ATLAS experiment’s sensitivity to supersymmetry after LHC Run 1 — interpreted in the phenomenological MSSM
journal, October 2015

General gauge mediation at the weak scale
journal, March 2016