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KIAS HEP seminars

[Seminar] Shu-Heng Shao

by Prof. Shu-Heng Shao (YITP, Stony Brook)

→ Asia/Seoul
Online (KIAS)

Online

KIAS
Description

Title: Why Do Pions Decay?

Speaker: Shu-Heng Shao (Stony Brook University)

Abstract: In massless QED, we find that the classical U(1) chiral symmetry is not completely broken by the Adler-Bell-Jackiw anomaly. Rather, it is resurrected as a generalized global symmetry labeled by the rational numbers. Intuitively, this new global symmetry in QED is a composition of the naive axial rotation and a fractional quantum Hall state. The conserved symmetry operators do not obey a group multiplication law, but a non-invertible fusion algebra. We further generalize our construction to QCD, and show that the neutral pion decay can be derived from a matching condition of the non-invertible global symmetry.

 

KIAS.pdf
video
[Seminar] Shu-Heng Shao, Yichul Choi
Zoom Meeting ID
81689182267
Host
KIAS HEP-PH Organizer
Passcode
32031535
Zoom URL