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KEK Theory Meeting on Particle Physics Phenomenology (KEK-PH2026winter)

16–19 Feb 2026
San-go-kan (Building #3)
Asia/Tokyo timezone

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Session

parallel session B: Cosmo

18 Feb 2026, 10:40
meeting room

meeting room

Conveners

parallel session B: Cosmo

  • Yannis Georis

Presentation materials

There are no materials yet.

  1. 41. Quintessence with a sudden transitional feature and its late-time cosmological signals
    Takahiro Terada
    18/02/2026, 10:40

    Combinations of recent cosmological observations, including Dark Energy Spectroscopic Instrument, show hints of a dynamical nature for dark energy. While the data suggest the possibility of the phantom crossing, it is worth exploring thoroughly quintessence models. As phenomenological parametrizations of the equation-of-state parameter $w(a)$ with a sharp transitional feature fit the data...

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  2. 42. Gravitational Wave signatures of Reheating after Warm Axion Inflation
    Tenta Tsuji
    18/02/2026, 11:00

    Before the Big Bang, the Universe experienced an era of accelerated expansion known as inflation.
    Reheating is the process that bridges this inflationary phase to the hot Big Bang, and it also provides one of the few opportunities for information from the inflaton sector to survive into the later Universe. Although many details of the inflaton’s interactions are erased as the Universe...

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  3. 43. Quantum sensing of high-frequency gravitational waves with ion traps
    Ryoto Takai
    18/02/2026, 11:20
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