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SUMMARY:Juven Wang (Harvard)
DTSTART:20211123T193000Z
DTEND:20211123T203000Z
DTSTAMP:20260423T024532Z
UID:nhetc/28
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/nhetc/28/">Q
 uantum Criticality Beyond the Standard Model and Ultra Unification</a>\nby
  Juven Wang (Harvard) as part of NHETC Seminar\n\n\nAbstract\nWe propose a
  theory [arXiv:2012.15860] beyond the Standard Model (SM) and Grand Unific
 ation (GUT) with 15n Weyl fermions by adding new gapped Topological Phase 
 Sectors based on nonperturbative global anomaly cancellations and cobordis
 m constraints (especially from the baryon minus lepton number B − L \, t
 he electroweak hypercharge Y\, and the Z_{16} class mixed gauge-gravitatio
 nal anomaly). Gapped topological phase sectors are constructed via symmetr
 y extension (in contrast with the Anderson-Higgs symmetry breaking)\, whos
 e low energy contains unitary Lorentz invariant topological quantum field 
 theories (TQFTs): either (3+1)d noninvertible TQFT\, or (4+1)d invertible 
 or noninvertible TQFT (short-range or long-range entangled gapped phase). 
 Alternatively\, there could also be right-handed neutrinos\, or gapless un
 particle conformal field theories\, or their combinations to altogether ca
 ncel the mixed gauge-gravitational anomaly. We also introduce an alternati
 ve view [arXiv:2106.16248] that the SM is a low-energy quantum vacuum aris
 ing from various neighbor GUT vacua competition in an immense quantum phas
 e diagram. In particular\, we demonstrate how the su(3)×su(2)×u(1) SM wi
 th 16n Weyl fermions arose near the quantum criticality between the compet
 ition of Georgi-Glashow su(5) model and Pati-Salam su(4)×su(2)×su(2) mod
 el. Moreover\, to manifest a Beyond-the-Standard-Model (BSM) and Beyond-La
 ndau-Ginzburg deconfined quantum criticality between Georgi-Glashow and Pa
 ti-Salam models\, we introduce a parent effective field theory of a modifi
 ed so(10) GUT (with a Spin(10) gauge group) plus a new 4d discrete torsion
  class of Wess-Zumino-Witten-like term that saturates a Z_2 class global m
 ixed gauge-gravity anomaly captured by a 5d invertible topological field t
 heory w2w3(TM)=w2w3(VSO(10)). We show new fractionalized excitations of Co
 lor-Flavor separation\, and gauge enhancement including a Dark Gauge force
  sector\, or gauge-enhanced 4d criticality as a boundary criticality such 
 that only appropriately gauge enhanced dynamical GUT gauge fields can prop
 agate into an extra-dimensional 5d bulk.\n\nThe talk is mainly based on ar
 Xiv:2012.15860\, arXiv:2106.16248\, and arXiv:2111.10369 (with Yi-Zhuang Y
 ou).\n
LOCATION:https://researchseminars.org/talk/nhetc/28/
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