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Institute for Particle Physics Phenomenology

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Institute for Particle Physics Phenomenology

Description: 

We study signals of pair produced scalar-tau's that decay
 into a tau and a light bino at the LHC, for a specific MSSM
 scenario which could explain the observed gamma ray spectrum
 in the low-latitudes of Fermi Bubble in the Galactic center.
 The scenario is consistent with the observation only when
 the dark matter is almost pure bino and the light stau of
 mass around 100 GeV is a maximally mixed state.  The higgsino
 component of the dark matter is constrained by the Higgs
 invisible width and the direct DM search experiments, while
 the large stau mixing enhances the Higgs to two gamma rate
 and breaks lepton universality of electroweak observables.
 At the LHC, both the stau pair production cross section and
 the produced tau polarization depends strongly on the stau
 mixing.  We show that there is a possibility of observing
 the signal in tau-pair production events with large missing
 transverse momentum at LHC8 with 20/fb of integrated luminosity.

Type: 
Lecture
Category: 
Jan 2014 - Sep 2014
Date: 
28/04/2014
Room: 
OC218
Timezone: 
Europe/London
EventChairs: 
Kaoru Hagiwara
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