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SUMMARY:Michael Nee (Harvard University)
DTSTART:20241112T150000Z
DTEND:20241112T160000Z
DTSTAMP:20260423T021129Z
UID:AnLy/47
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/AnLy/47/">Ax
 ion couplings in Heterotic String Theory</a>\nby Michael Nee (Harvard Univ
 ersity) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\n
 The couplings of axions to gauge bosons are highly restricted in Grand Uni
 fied Theories and heterotic string models. The topological nature of these
  couplings allows them to be matched from the UV to the IR\, and the ratio
  of the anomaly with photons and gluons for any axion is fixed by UV physi
 cs. This implies that in these theories there is a single axion\, the QCD 
 axion\, with an anomalous coupling to photons. Other light axion-like part
 icles can couple to photons by mixing through the QCD axion portal and lie
  to the right of the QCD line in the mass-coupling plane. A discovery of a
 n axion to the left of the QCD line can rule out unified theories and some
  heterotic models. Axion experiments are therefore experimental probes of 
 unification and string theory.\n
LOCATION:https://researchseminars.org/talk/AnLy/47/
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