Zobrazeno 1 - 10
of 93
pro vyhledávání: '"Kin-ya Oda"'
Publikováno v:
Physics Letters B, Vol 859, Iss , Pp 139133- (2024)
We propose a mechanism of preheating stage after inflation, using a new idea of parametrically amplified super-radiance. Highly coherent state, characterized by macro-coherence of scalar field coupled to produced massless particle in pairs, is create
Externí odkaz:
https://doaj.org/article/707e10a71c2540d79af04a207810b804
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 10, Pp 1-32 (2023)
Abstract There is a long-standing anomaly in the ratio of the decay width for $$\psi (3770)\rightarrow D^0\overline{D^0}$$ ψ ( 3770 ) → D 0 D 0 ¯ to that for $$\psi (3770)\rightarrow D^+D^-$$ ψ ( 3770 ) → D + D - at the level of $$9.5\,\sigma
Externí odkaz:
https://doaj.org/article/3ba2f149dbf842468200e937c4430a6d
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 6, Pp 1-22 (2023)
Abstract The gauge-invariant two-point function of the Higgs field at the same spacetime point can make a natural gauge-invariant order parameter for spontaneous gauge symmetry breaking. However, this composite operator is ultraviolet divergent and i
Externí odkaz:
https://doaj.org/article/f66d8795effe4b69830d2191d9007519
Autor:
Haruhi Mitani, Kin-ya Oda
Publikováno v:
Physics Letters B, Vol 846, Iss , Pp 138218- (2023)
There is renewed attention to whether we can observe the decoherence effect in neutrino oscillation due to the separation of wave packets with different masses in near-future experiments. As a contribution to this endeavor, we extend the existing for
Externí odkaz:
https://doaj.org/article/27b2d6a28b8942f2aa6c4d1ab92c674d
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 5, Pp 1-12 (2022)
Abstract The multicritical-point principle (MPP) provides a natural explanation of the large hierarchy between the Planck and electroweak scales. We consider a scenario in which MPP is applied to the Standard Model extended by two real singlet scalar
Externí odkaz:
https://doaj.org/article/35f02d6f3de246b3a559ee540008cd1b
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 1, Pp 1-17 (2022)
Abstract We study $$R^2$$ R 2 -Higgs inflation in a model with two Higgs doublets in which the Higgs sector of the Standard Model is extended by an additional Higgs doublet, thereby four scalar fields are involved in the inflationary evolutions. We f
Externí odkaz:
https://doaj.org/article/d18bb93c70be44aa9145edcfa44735bc
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 11, Pp 1-18 (2021)
Abstract We propose a minimal model that can explain the electroweak scale, neutrino masses, Dark Matter (DM), and successful inflation all at once based on the multicritical-point principle (MPP). The model has two singlet scalar fields that realize
Externí odkaz:
https://doaj.org/article/f4bc97a587d544298a9b5f3788ae9564
Autor:
Kin-ya Oda, Juntaro Wada
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 8, Pp 1-26 (2021)
Abstract We define a set of fully Lorentz-invariant wave packets and show that it spans the corresponding one-particle Hilbert subspace, and hence the whole Fock space as well, with a manifestly Lorentz-invariant completeness relation (resolution of
Externí odkaz:
https://doaj.org/article/af49e51b48544e0184f4efb6ba8bf82c
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 3, Pp 1-22 (2021)
Abstract We propose a scenario of spontaneous leptogenesis in Higgs inflation with help from two additional operators: the Weinberg operator (Dim 5) and the derivative coupling of the Higgs field and the current of lepton number (Dim 6). The former i
Externí odkaz:
https://doaj.org/article/b39e25960e97433bab974e845867f75f
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 1, Pp 1-31 (2021)
Abstract We investigate a model with two real scalar fields that minimally generates exponentially different scales in an analog of the Coleman-Weinberg mechanism. The classical scale invariance — the absence of dimensionful parameters in the tree-
Externí odkaz:
https://doaj.org/article/a51ee97813634a3fba5ce426ef87952c