2013 Spring Graduate Colloquium Series: Kranti Gunthoti/Bao-Fei Li

DateApril 19, 2013
Time3:35 - 5:00 pm
LocationBaylor Sciences Building, Room E.125
Kranti Gunthoti
Search for Supersymmetry at CMS

Supersymmetry is considered as one of the leading candidates for a model of beyond the standard model physics. It naturally solves the hierarchy problem and provides a possible candidate for dark matter and an elegant solution to the
gauge coupling unification. Therefore a lot of emphasis is given in probing supersymmetry at high energy physics collider experiments. I will talk about recent results on a search for supersymmetric particles in events with large
missing transverse momentum produced in center of mass ăs = 7 TeV protonproton collisions using a data sample corresponding to an integrated luminosity of 4.98 fb−1 recorded by the CMS experiment at the Large Hadron Collider.
(Based on S. Chatrchyan et al., Physical Review Letters 109, 171803 (2012))

Bao-Fei Li
A Phenomenological Model for Open-Flavor
Strong Decays

In our decay model, the decay interaction consists of both scalar confining
interaction and One-Gluon-Exchange (OGE) interaction which are exact analogues to the potentials in quark potential model. Later, in order to apply this model to meson decays in u, d, s flavor sector, gluons are treated as
massive vector bosons and the approximation of four-fermion interaction is thus adopted. Then different roles of two interactions are studied by
experimentally well established decays as well as D/S ratios of two important channels, b1¨ƒÖ+ƒÎ and a1¨ƒĎ+ƒÎ. These analyses eventually reveal that scalar interaction dominates in most open-flavor decays and is also preferred by ratio
test. (Based on Bao-Fei Li, et al., Chinese Physics C 36, 106-116 (2012))

For more information, please contact: Dr. Linda Olafsen 254-710-2541

PublisherDepartment of Physics
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