Indirect Searches of Degenerate MSSM

28 Aug 2015, 17:30
20m
Mountain ()

Mountain

Supersymmetry Phenomenology and Experiment SUSY Expt. and Phenomenology

Speaker

Debtosh Chowdhury (INFN, Roma)

Description

A degenerate supersymmetric sparticle spectrum can escape constraints from flavor physics and at the same time evading the limits from the direct searches if the degeneracy extends to the gaugino sector. Inspired by this, we consider a scenario where all the soft terms have approximately a common mass scale at $M_{\text{SUSY}}$ while allowing for splittings within $\mathcal{O}(10\%)$. As a result, the third generation sfermions have large to maximal (left-right) mixing, the same being the case with charginos and some sectors of the neutralino mass matrix. We study this scenario in the light of discovery of the Higgs boson with mass $\sim$ 125 GeV. We consider constraints from $B$-physics, the anomalous magnetic moment of the muon ($a_\mu$) and the dark matter relic density. We find that the supersymmetric spectrum as light as 600 GeV is still possible to escape the present limits from LHC and flavor physics and can account for the observed $a_\mu$ within $2\sigma$. The neutralino relic density is too small to meet the observed data where as direct search limits from XENON100 and LUX put severe constraints on this scenario.

Primary author

Debtosh Chowdhury (INFN, Roma)

Co-authors

Ketan Patel (INFN, Padova) Sudhir Kumar Vempati (Centre for High Energy Physics, Indian Institute of Science) Xerxes Tata (University of Hawaii)

Presentation Materials