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SUMMARY:Miguel Montero (Harvard)
DTSTART:20210323T150000Z
DTEND:20210323T160000Z
DTSTAMP:20260513T222342Z
UID:CCTP_HEP/41
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CCTP_HEP/41/
 ">Chern-Weil global symmetries and completeness of the spectrum</a>\nby Mi
 guel Montero (Harvard) as part of CCTP HEP Seminars\n\n\nAbstract\nPerhaps
  the oldest Swampland conjecture in the book is the absence of global symm
 etries. I will describe the consequences of applying this conjecture to a 
 particular class of symmetries\, Chern-Weil symmetries\, that are ubiquito
 us in string compactifications and which arise from powers of fieldstrengh
 ts. I will explore the processes by which Chern-Weil symmetries may be bro
 ken or gauged in effective field theory and string theory. This will allow
  us to derive the existence of familiar features of string theory\, such a
 s worldvolume degrees of freedom in branes. Another lore holds that absenc
 e global symmetries in a quantum field theory is equivalent to having a co
 mplete spectrum of charged states in the theory. I will discuss and make p
 recise this connection\, and explain and how a particular version of it ca
 n be proven in pure gauge theory with arbitrary (even disconnected) gauge 
 group.\n
LOCATION:https://researchseminars.org/talk/CCTP_HEP/41/
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