2-7 June 2019
Simon Fraser University
America/Vancouver timezone
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73 - Search for SUSY with missing transverse momentum and multiple b-jets

Jun 4, 2019, 5:12 PM
SWH 9082 + AQ South-East Corner / coin sud-est (Simon Fraser University)

SWH 9082 + AQ South-East Corner / coin sud-est

Simon Fraser University

Poster not-in-competition (Graduate Student) / Affiche non-compétitive (Étudiant(e) du 2e ou 3e cycle) Particle Physics / Physique des particules (PPD) PPD Poster Session & Student Poster Competition Finals (26) | Session d'affiches PPD et finales du concours d'affiches étudiantes (26)


Meisam Ghasemi Bostanabad (University of Victoria (CA))


Strong multi-b analysis:
A search for supersymmetry involving the pair production of gluinos decaying via third generation squarks into lightest neutralino ($\tilde\chi^0_1$) is performed. The final state contains large missing transverse momentum and several energetic jets, at least three of which must be identified as b-quarks. The analysis uses the dataset of proton-proton collisions with an integrated luminosity of 79.8 fb$^{-1}$, recorded with ATLAS at $\sqrt{s} = 13$ TeV. No excess is found above the predicted background. For $\tilde\chi^0_1$ masses below approximately 800 GeV, gluino masses of less than 2.2 TeV are excluded at 95% confidence level.

Electroweak multi-b analysis:
This analysis searches for supersymmetric partners of Higgs boson (higgsinos $\tilde{H}$) in gauge-mediated scenarios. Each higgsino is assumed to decay to a Higgs boson and gravitino. Different Higgs reconstruction methods have been tested to provide higher signal gain. LHC $pp$ collision data at a center-of-mass energy $\sqrt{s}=$ 13 TeV, with an integrated luminosity of 36.1 fb$^{-1}$ collected with ATLAS detector in 2015 and 2016 is used as an input. Limits on the cross-section are set as a function of the mass of the $\tilde{H}$ in simplified model assuming higgsinos decaying to a Higgs boson and a gravitino.

Primary author

Meisam Ghasemi Bostanabad (University of Victoria (CA))

Presentation materials