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Free Meson Seminars

Some Exact Results in QCD-like and Chiral Gauge Theories

by Prof. Hitoshi Murayama (University of California, Berkeley, USA)

Thursday, July 8, 2021 from to (Asia/Kolkata)
at Zoom
Description Please contact rishi(at)theory(dot)tifr(dot)res(dot)in for the zoom meeting id and the password for this seminar.

I present some exact results in QCD-like and chiral gauge theories. They are exact when supersymmetric gauge theories are perturbed by anomaly-mediated supersymmetry breaking (AMSB). Thanks to the UV-insensitivity of AMSB, SUSY results can be perturbed with no ambiguities even when applied to composite fields. I find two phases for QCD-like theories, one with chiral symmetry breaking and another conformal. To best of my knowledge, this is the first analytic derivation of chiral symmetry breaking in QCD for SU(3) and Nf=2 or 3. Our results for chiral gauge theories do not agree with what had been suggested by tumbling. We suggest alternative schemes of tumbling-like interpretations. We see no evidence that large SUSY breaking leads to phase transitions, perhaps protected by holomorphy. I also present a few examples of our predictions which I hope will be tested by lattice QCD.

https://www.youtube.com/watch?v=0PgLF_EG1H4