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SUMMARY:Pseudo-scalar dark energy and cosmic birefringence
DTSTART;VALUE=DATE-TIME:20260916T141000Z
DTEND;VALUE=DATE-TIME:20260916T143500Z
DTSTAMP;VALUE=DATE-TIME:20261028T070223Z
UID:indico-contribution-31294@indico.ific.uv.es
DESCRIPTION:Speakers: Marco Regis (University of Torino and INFN)\nA cosmo
 logical pseudo-scalar field provides a compelling realization of dynamical
 \ndark energy (DE). If its coupling to photons is non-negligible\, the cos
 mic microwave background acquires a rotation of its polarization plane\, k
 nown as cosmic birefringence. We discuss pseudo-scalar models that can sim
 ultaneously account for the recent hints of evolution in the equation of s
 tate of DE and of the presence of cosmic birefringence.\n\nhttps://indico.
 ific.uv.es/event/8160/contributions/31294/
LOCATION:
URL:https://indico.ific.uv.es/event/8160/contributions/31294/
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