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22-28 July 2018
Kellogg Hotel and Conference Center
EST timezone

eBRST SU(2) Gauge Theory on Lattice

Jul 24, 2018, 3:20 PM
20m
104 (Kellogg Hotel and Conference Center)

104

Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Physics Beyond the Standard Model Physics beyond the Standard Model

Speaker

Mr Mugdha Sarkar (Saha Institute of Nuclear Physics)

Description

Equivariant BRST (eBRST) SU(2) gauge theory involves gauge fixing in the SU(2)/U(1) coset space leaving the subgroup U(1) gauge invariant. This can be taken as an alternative formulation of SU(2) lattice gauge theory that uses gauge-fixing, evading the no-go theorem by Neuberger preventing the use of standard BRST. Results will be presented for our numerical simulation of the eBRST gauge theory, generalised with addition of a mass term (for both the ghost fields and the gauge fields in the coset space) that keeps the eBRST symmetry intact. The theory in the reduced limit has also a global SU(2) symmetry which has been speculated in the literature to undergo a spontaneous breaking to U(1). Our results on this possible spontaneous symmetry breaking and its implication for possible continuum limit will be presented.

Primary author

Mr Mugdha Sarkar (Saha Institute of Nuclear Physics)

Co-author

Prof. Asit Kumar De (Professor)

Presentation Materials