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Event Number 4311

  Thursday, October 13th, 2016

Theory Seminar (High Energy/Cosmology)
Flavoured squark signatures at the LHC
Time: 3:30 pm
Place: 4274 Chamberlin Hall
Speaker: Gabriel Lee
Abstract: We present benchmark points for LHC searches from flavored gauge mediation models, in which messenger–matter couplings give flavor-dependent squark masses. Our examples include spectra in which a single squark—stop, scharm, or sup—is much lighter than all other colored superpartners, motivating improved quark flavor tagging at the LHC. Many examples feature flavor mixing; in particular, large stop–scharm mixing is possible. The correct Higgs mass is obtained in some examples by virtue of the large stop A-term. We also revisit the general flavor and CP structure of the models. Even though the A-terms can be substantial, their contributions to EDM’s are very suppressed, because of the particular dependence of the A-terms on the messenger coupling. This holds regardless of the messenger-coupling texture. More generally, the special structure of the soft terms often leads to stronger suppression of flavor- and CP-violating processes, compared to naive estimates.
Host: Joshua Berger
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