【12.26】Seminar：Proving chiral symmetry breaking in QCD with 't Hooft anomaly matching
Seminar
Title: Proving chiral symmetry breaking in QCD with 't Hooft anomaly matching
Speaker: Dr. Ling-Xiao Xu (Abdus Salam International Centre for Theoretical Physics)
Host：Prof. Bin Yan (Institute of High Energy Physics, CAS)
Time: Dec. 26, 2024 (Thursday), 10:00 am Beijing Time
Location: Meeting Room 319, Library Building
Abstract:
Chiral symmetry breaking in confining QCD is a well-established phenomenon, yet it has been a challenge to derive this phenomenon from the theoretical viewpoint. In the seminal 1979 Cargese lectures, 't Hooft showed how to use anomaly matching to prove chiral symmetry breaking in QCD-like theories, he showed some examples but didn’t give the fully general proof. In this talk, I will present a new strategy which leads to a general proof. (If time permits, I will also review the strategies that have been pursed in literature and point out their limitations.) This talk is based on the recent papers: hep-th/2212.02930, 2404.02971, 2404.02967.
About the Speaker:
Ling-Xiao Xu is currently a postdoc fellow at Abdus Salam International Centre for Theoretical Physics (ICTP), Trieste, Italy. Before this he was a postdoc at University of Padova and INFN, Italy. He received his Ph.D. in theoretical physics from Peking University in 2021. He is interested in physics beyond the Standard Model and application of symmetries and anomalies in understanding nonperturbative aspects of Quantum Field Theory.
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