Abstract

Results are presented of a search for a "natural" supersymmetry scenario with gauge mediated symmetry breaking. It is assumed that only the supersymmetric partners of the top quark (the top squark) and the Higgs boson (Higgsino) are accessible. Events are examined in which there are two photons forming a Higgs boson candidate, and at least two b-quark jets. In 19.7 fb-1 of proton-proton collision data at s=8 TeV, recorded in the CMS experiment, no evidence of a signal is found and lower limits at the 95% confidence level are set, excluding the top squark mass below 360 to 410GeV, depending on the Higgsino mass.

Highlights

  • Signal (m~tR/m∼χ0): 350 / 135 GeV 400 / 300 GeV 300 / 290 GeV 2 EmT iss (GeV) (b)Signal (m~tR/m∼χ0): 350 / 135 GeV 300 / 290 GeV 3 12 (c)Data Background Signal (m~tR/m∼χ0): 350 / 135 GeV 300 / 290 GeVFIG. 3

  • The essential requirement of natural SUSY is that the masses of the superpartners of the top quark and the Higgs bosons, the top squark and the Higgsinos, be light

  • In the investigated SUSY signal, b-quark jets can originate from decays of the other Higgs bosons and from decays of top squark. This is exploited by separating events into three categories with different expected backgrounds as follows: (i) events with at least one additional combined secondary vertex (CSV)-loose week ending 25 APRIL 2014 b-quark jet in addition to the two, (ii) events for which the invariant mass of the two b-quark jets is within a Higgs mass window from 95 to 155 GeV, and (iii) all other events

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Summary

Introduction

The essential requirement of natural SUSY is that the masses of the superpartners of the top quark and the Higgs bosons, the top squark and the Higgsinos, be light (see, e.g., [5,6]). This is exploited by separating events into three categories with different expected backgrounds as follows: (i) events with at least one additional CSV-loose week ending 25 APRIL 2014 b-quark jet in addition to the two (i.e., events with three or more b-quark jets), (ii) events for which the invariant mass of the two b-quark jets is within a Higgs mass window from 95 to 155 GeV, and (iii) all other events.

Results
Conclusion
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