Search Results - "Takahashi, Fuminobu"

New inflation in supergravity after Planck and LHC by Takahashi, Fuminobu

“…We revisit a single-field new inflation model based on a discrete R symmetry. Interestingly, the inflaton dynamics naturally leads to a heavy gravitino of mass…”
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Linear inflation from running kinetic term in supergravity by Takahashi, Fuminobu

“…We propose a new class of inflation models in which the coefficient of the inflaton kinetic term rapidly changes with energy scale. This naturally occurs…”
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QCD axion on hilltop by a phase shift of π by Takahashi, Fuminobu, Yin, Wen

“…A bstract We show that the initial misalignment angle of the QCD axion (or axion-like particles) can be set very close to π , if the QCD axion has a mixing…”
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Gravitational waves and dark radiation from dark phase transition: Connecting NANOGrav pulsar timing data and hubble tension by Nakai, Yuichiro, Suzuki, Motoo, Takahashi, Fuminobu, Yamada, Masaki

“…Recent pulsar timing data reported by the NANOGrav collaboration may indicate the existence of a stochastic gravitational wave background around f∼10−8 Hz. We…”
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ALP inflation and Big Bang on Earth by Takahashi, Fuminobu, Yin, Wen

“…A bstract We study a hilltop inflation model where an axion-like particle (ALP) plays the role of the inflaton. We find that, for a broad class of potentials,…”
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Relic abundance of dark photon dark matter by Agrawal, Prateek, Kitajima, Naoya, Reece, Matthew, Sekiguchi, Toyokazu, Takahashi, Fuminobu

“…We present a new mechanism for producing the correct relic abundance of dark photon dark matter over a wide range of its mass, extending down to 10−20eV. The…”
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XENON1T Excess from Anomaly-Free Axionlike Dark Matter and Its Implications for Stellar Cooling Anomaly by Takahashi, Fuminobu, Yamada, Masaki, Yin, Wen

“…Recently, an anomalous excess was found in the electronic recoil data collected at the XENON1T experiment. The excess may be explained by an axionlike particle…”
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Axion dark matter from first-order phase transition, and very high energy photons from GRB 221009A by Nakagawa, Shota, Takahashi, Fuminobu, Yamada, Masaki, Yin, Wen

“…We study an axion-like particle (ALP) that experiences a first-order phase transition with respect to its mass or potential minimum. This can be realized if…”
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What if ALP dark matter for the XENON1T excess is the inflaton by Takahashi, Fuminobu, Yamada, Masaki, Yin, Wen

“…A bstract The recent XENON1T excess in the electron recoil data can be explained by anomaly-free axion-like particle (ALP) dark matter with mass m ϕ = 2 . 3 ±…”
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Singlet extensions and W boson mass in light of the CDF II result by Sakurai, Kodai, Takahashi, Fuminobu, Yin, Wen

“…Recently, the CDF collaboration has reported the precise measurement of the W boson mass, MW=80433.5±9.4MeV, based on 8.8 fb−1 of s=1.96 TeV pp¯ collision data…”
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Cosmological implications of ns ≈ 1 in light of the Hubble tension by Takahashi, Fuminobu, Yin, Wen

“…Recently, a low-z measurement of the Hubble constant, H0=73.04±1.04km/s/Mpc, was reported by the SH0ES Team. The long-standing Hubble tension, i.e. the…”
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Dark radiation and dark matter in large volume compactifications by Higaki, Tetsutaro, Takahashi, Fuminobu

“…A bstract We argue that dark radiation is naturally generated from the decay of the overall volume modulus in the LARGE volume scenario. We consider both…”
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The ALP miracle revisited by Daido, Ryuji, Takahashi, Fuminobu, Yin, Wen

“…A bstract We revisit the ALP miracle scenario where the inflaton and dark matter are unified by a single axion-like particle (ALP). We first extend our…”
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QCD axion window and false vacuum Higgs inflation by Matsui, Hiroki, Takahashi, Fuminobu, Yin, Wen

“…A bstract The abundance of the QCD axion is known to be suppressed if the Hubble parameter during inflation, H inf , is lower than the QCD scale, and if the…”
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Cosmological abundance of the QCD axion coupled to hidden photons by Kitajima, Naoya, Sekiguchi, Toyokazu, Takahashi, Fuminobu

“…We study the cosmological evolution of the QCD axion coupled to hidden photons. For a moderately strong coupling, the motion of the axion field leads to an…”
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Anomaly-free axion dark matter in three Higgs doublet model and its phenomenological implications by Sakurai, Kodai, Takahashi, Fuminobu

“…A bstract We study phenomenological implications of an axion that arises as a pseudo Nambu-Goldstone boson due to the spontaneous breaking of anomaly-free…”
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Natural and multi-natural inflation in axion landscape by Higaki, Tetsutaro, Takahashi, Fuminobu

“…A bstract We propose a landscape of many axions, where the axion potential receives various contributions from shift symmetry breaking effects. We show that…”
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Erratum to: Anomaly-free axion dark matter in three Higgs doublet model and its phenomenological implications by Sakurai, Kodai, Takahashi, Fuminobu

“…A correction to this paper has been published: https://doi.org/10.1007/JHEP07(2022)124…”
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Stability of domain wall network with initial inflationary fluctuations and its implications for cosmic birefringence by Gonzalez, Diego, Kitajima, Naoya, Takahashi, Fuminobu, Yin, Wen

“…We study the formation and evolution of domain walls with initial inflationary fluctuations by numerical lattice calculations that, for the first time,…”
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Isocurvature perturbations of dark energy and dark matter from the Swampland conjecture by Matsui, Hiroki, Takahashi, Fuminobu, Yamada, Masaki

“…We point out that the recently proposed Swampland conjecture on the potential gradient can lead to isocurvature perturbations of dark energy, if the…”
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