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TZID:Europe/Rome
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
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TZNAME:CEST
DTSTART:20260329T010000
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DTSTART:20261025T010000
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DTSTART;TZID=Europe/Rome:20261006T113000
DTEND;TZID=Europe/Rome:20261006T130000
DTSTAMP:20260914T121100
CREATED:20260909T075743Z
LAST-MODIFIED:20260909T075743Z
UID:41591-1791286200-1791291600@w3.lnf.infn.it
SUMMARY:From minimal to general: the structure of axion solutions to the strong CP problem
DESCRIPTION:Speaker: Mario Fernandez Navarro (University of Zurich) \nThe QCD axion provides a compelling solution to the strong CP problem. In this talk I will discuss a minimal origin for the otherwise unspecified Peccei-Quinn symmetry of the QCD axion based on an extra-dimensional gauge theory\, which nevertheless retains much of the simplicity of traditional KSVZ/DFSZ anomaly sectors. I will then consider more general scenarios involving additional PQ-breaking sources compatible with the strong CP solution\, and/or multiple axion states originating from extra PQ symmetries. I will show that the photon-coupling phenomenology is qualitatively controlled by two structural properties: whether a linear combination of PQ symmetries broken only by QCD exists\, and whether the anomaly coefficients are universal. This leads to a general sum rule governing the (multi-)axion system\, helping to connect a potential experimental signature with the underlying axion potential and its UV completion.
URL:/event/from-minimal-to-general-the-structure-of-axion-solutions-to-the-strong-cp-problem/
LOCATION:Aula Salvini
CATEGORIES:Seminari teorici
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