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Light stop in the MSSM after LHC Run 1

Belanger, Genevieve and Ghosh, Diptimoy and Godbole, Rohini and Kulkarni, Suchita (2015) Light stop in the MSSM after LHC Run 1. In: JOURNAL OF HIGH ENERGY PHYSICS (9).

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Official URL: http://dx.doi.org/10.1007/JHEP09(2015)214


The discovery of a Higgs boson with a mass of 126 GeV at the LHC when combined with the non-observation of new physics both in direct and indirect searches imposes strong constraints on supersymmetric models and in particular on the top squark sector. The experiments for direct detection of dark matter have provided with yet more constraints on the neutralino LSP mass and its interactions. After imposing limits from the Higgs, flavour and dark matter sectors, we examine the feasibility for a light stop in the context of the pMSSM, in light of current results for stop and other SUSY searches at the LHC. We only require that the neutralino dark matter explains a fraction of the cosmologically measured dark matter abundance. We find that a stop with mass below similar to 500 GeV is still allowed. We further study various probes of the light stop scenario that could be performed at the LHC Run-II either through direct searches for the light and heavy stop, or SUSY searches not currently available in simplified model results. Moreover we study the characteristics of heavy Higgs for the points in the parameter space allowed by all the available constraints and illustrate the region with large cross sections to fermionic or electroweakino channels. Finally we show that nearly all scenarios with a small stop-LSP mass difference will be tested by Xenon1T provided the NLSP is a chargino, thus probing a region hard to access at the LHC.

Item Type: Journal Article
Publisher: SPRINGER
Additional Information: Copy right for this article belongs to theSPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
Keywords: Supersymmetry Phenomenology
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited: 05 Nov 2015 07:23
Last Modified: 05 Nov 2015 07:23
URI: http://eprints.iisc.ac.in/id/eprint/52688

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