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VERSION:2.0
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BEGIN:VEVENT
SUMMARY:From Hubble to Bubble - gravitational waves from phase transitions
  after inflation
DTSTART:20240118T143000Z
DTEND:20240118T160000Z
DTSTAMP:20260814T061054Z
UID:1e3d7c35-328f-4feb-acca-f7c200e86aa8
SEQUENCE:2
CREATED:20240111T144709Z
DESCRIPTION:ABSTRACT: The prospect of a stochastic gravitational wave (GW)
  background from the primordial universe offers a promising new window for
  cosmology and fundamental physics. Studying the GW signals from cosmologi
 cal phase transitions can illuminate aspects of Beyond the Standard Model 
 (BSM) physics and allow us to probe the early universe via a new perspecti
 ve. In this study (2309.08530)\, we investigated minimal scalar BSM extens
 ions\, with respect to the evolution of the scalar potential at the end of
  inflation. More specifically\, we focussed on the transition from the typ
 ical potential-dominated de Sitter epoch to the kinetic dominated period d
 ubbed kination. In this setting\, a strong first-order phase transition ca
 n take place because of the scalar field&#x27\;s decreasing potential barr
 ier due to its non-minimally coupling to gravity. Therefore\, a characteri
 stic GW spectrum can be produced from the collision of true-vacuum bubbles
 . With this prescription\, we propose a new triggering mechanism for BSM p
 hase transitions that could produce potentially observable GW signatures w
 ith the future detectors.
LAST-MODIFIED:20240115T141829Z
LOCATION:Sala de Seminários do DF\,  Pavilhão de Física\, 2º piso
URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/from-hubble-to-bubble-grav
 itational-waves-from-phase-transitions-after-inflation/
X-ALT-DESC;FMTTYPE=text/html:<p data-block-key="s4o5u">ABSTRACT: The prosp
 ect of a stochastic gravitational wave (GW) background from the primordial
  universe offers a promising new window for cosmology and fundamental phys
 ics. Studying the GW signals from cosmological phase transitions can illum
 inate aspects of Beyond the Standard Model (BSM) physics and allow us to p
 robe the early universe via a new perspective.<br/><br/> In this study (23
 09.08530)\, we investigated minimal scalar BSM extensions\, with respect t
 o the evolution of the scalar potential at the end of inflation. More spec
 ifically\, we focussed on the transition from the typical potential-domina
 ted de Sitter epoch to the kinetic dominated period dubbed kination.<br/><
 br/> In this setting\, a strong first-order phase transition can take plac
 e because of the scalar field&#x27\;s decreasing potential barrier due to 
 its non-minimally coupling to gravity. Therefore\, a characteristic GW spe
 ctrum can be produced from the collision of true-vacuum bubbles. With this
  prescription\, we propose a new triggering mechanism for BSM phase transi
 tions that could produce potentially observable GW signatures with the fut
 ure detectors.</p>
END:VEVENT
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