The idea that low energy fields such as Gravitons or Axions can be thought of as composite particles has been entertained since a long time. We revisit this idea motivated by the AdS/CFT correspondence. We focus in the case of axions and show that hidden sectors coupled to SM fields may provide an emergent axionic field that is a composite of the hidden fields (instanton density). This is a more general phenomenon beyond holographic theories. We study the general properties of such an "emergent axion", without a PQ symmetry. The construction goes beyond holography and we make a preliminary analysis on the phenomenological viability of our class of models.
Tuesday, 28 January, 2020 - 14:00 to 15:00
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University of Crete
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