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SUMMARY:A solution to the strong CP problem from mirror QCD and chiral U(1
 )
DTSTART;VALUE=DATE-TIME:20260625T030000Z
DTEND;VALUE=DATE-TIME:20260625T040000Z
DTSTAMP;VALUE=DATE-TIME:20260702T000900Z
UID:indico-event-5122@indico-tdli.sjtu.edu.cn
DESCRIPTION:Speakers: Keisuke Harigaya (the University of Chicago)\n\nAbst
 ract:We present a solution to the strong CP problem in which a simple chir
 al U(1) gauge symmetry gives rise to an accidental Peccei-Quinn symmetry. 
 The Peccei-Quinn symmetry is both explicitly and spontaneously broken by m
 irror QCD dynamics\, yielding a framework without an axion quality problem
 . The model contains no stable domain walls or colored relics\, and it acc
 ommodates a sufficiently high reheating temperature to account for the bar
 yon asymmetry of the Universe via leptogenesis. Metastable domain walls ge
 nerate a stochastic background of primordial gravitational waves. Addition
 ally\, one of the pseudo-Nambu-Goldstone bosons serves as a viable WIMP da
 rk matter candidate\, while colored pseudo-Nambu-Goldstone bosons can be p
 robed at the LHC through searches for jets plus missing energy\, multi jet
 s plus leptons\, and displaced vertices. Biography:Keisuke Harigaya recei
 ved his PhD in physics from the University of Tokyo\, held postdoctoral po
 sitions at the UC Berkeley\, the Institute for Advanced Study\, and CERN\,
  and joined the University of Chicago as a faculty member in 2022. He stu
 dies theoretical particle physics and cosmology. Alternative online link:
  https://meeting.tencent.com/dm/NhkVPyarSSeoID:585608988\n\nhttps://indico
 -tdli.sjtu.edu.cn/event/5122/
LOCATION:Tsung-Dao Lee Institute/N6F-N600 - Lecture Room (Tsung-Dao Lee In
 stitute)
URL:https://indico-tdli.sjtu.edu.cn/event/5122/
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