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Upcoming High Energy Theory, Relativity, and Cosmology Seminars

HE

Windows for Light Charged Particles

Nov 27, 2017, 2:00 PM-3:00 PM

202 Physics Bldg.

Host: Jay Hubisz/ Contact: Yudaisy Salomón Sargentón, 315-443-5960

There is a well-known bound from LEP that says charged fermions should have masses greater than 100 GeV. In this talk, I will revisit this bound in detail and describe the caveats involved. LHC constraints will be presented and shown to provide stronger limits, in some cases, than those from LEP. Despite both LEP and LHC limits, I will demonstrate that models exist with charged fermions as light as 70 GeV.

HE

The Gauss Law : A Tale

Dec 4, 2017, 2:00 PM-3:00 PM

202 Physics Bldg.

Host: Simon Catterall/ Contact: Yudaisy Salomón Sargentón, 315-443-5960

The Gauss law plays a basic role in gauge theories, enforcing gauge invariance and creating edge states and superselection sectors.  This talk surveys these aspects of the Gauss law in QED, QCD and nonlinear G/H models.  It is argued that nonabelian superselection rules are spontaneously broken. That is the case with SU (3) of color which is spontaneously broken to U(1) x U(1).  Nonlinear G/H models are reformulated as gauge theories and the existence of edge states and superselection sectors in these models is established.

HE

TBD by Shailesh Chandrasekharan

Dec 8, 2017, 12:00 PM-1:30 PM

208 Physics Bldg.

Host: Simon Catterall/ Contact: Yudaisy Salomón Sargentón, 315-443-5960