Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Kenji Nishiwaki"'
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 $$9.5\,\sigma
Externí odkaz:
https://doaj.org/article/3ba2f149dbf842468200e937c4430a6d
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 6, Pp 1-22 (2023)
Abstract The gauge-invariant two-point function of the Higgs field at the same spacetime point can make a natural gauge-invariant order parameter for spontaneous gauge symmetry breaking. However, this composite operator is ultraviolet divergent and i
Externí odkaz:
https://doaj.org/article/f66d8795effe4b69830d2191d9007519
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 11, Pp 1-52 (2018)
Abstract We address the presently reported significant flavor anomalies in the Kaon and B meson systems such as the CP violating Kaon decay (ϵ′/ϵ) and lepton-flavor universality violation in B meson decays R K * , R D * $$ \left({R}_{K^{\left(*\r
Externí odkaz:
https://doaj.org/article/407c6b458fb242bcb28b17de470c78ac
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 7, Pp 1-19 (2018)
Abstract In this paper, we explore a new avenue to a natural explanation of the observed tiny neutrino masses with a dynamical realization of the three-generation structure in the neutrino sector. Under the magnetized background based on T 2 /Z 2, ma
Externí odkaz:
https://doaj.org/article/511dc9b16f9541af93c47f81ea883151
Publikováno v:
Nuclear Physics B, Vol 922, Iss C, Pp 186-225 (2017)
We classify possible boundary conditions of a 6d Dirac fermion Ψ on a rectangle under the requirement that the 4d Lorentz structure is maintained, and derive the profiles and spectrum of the zero modes and nonzero KK modes under the two specific bou
Externí odkaz:
https://doaj.org/article/a87f3a6dd9b74bf99ed8094e5b53800e
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 8, Pp 1-61 (2017)
Abstract We analyze the flavor structure of composite vector bosons arising in a model of vectorlike technicolor — often called hypercolor (HC) — with eight flavors that form a one-family content of HC fermions. Dynamics of the composite vector b
Externí odkaz:
https://doaj.org/article/f4cbcaeedd9846d08ab84657e958f3c4
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 77, Iss 5, Pp 1-16 (2017)
Abstract We study a class of models in which the Higgs pair production is enhanced at hadron colliders by an extra neutral scalar. The scalar particle is produced by the gluon fusion via a loop of new colored particles, and decays into di-Higgs throu
Externí odkaz:
https://doaj.org/article/9b751cd50a57481897b17cdd6ab8f331
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 4, Pp 1-23 (2017)
Abstract We study the CP-violating phase of the quark sector on T 2 /Z N (N = 2, 3, 4, 6) with non-vanishing magnetic fluxes, where properties of possible origins of the CP violation are investigated minutely. In this system, a non-vanishing value is
Externí odkaz:
https://doaj.org/article/beb1726eff204698a2fd25e48d9a2ec2
Autor:
Tomo-hiro Abe, Yukihiro Fujimoto, Tatsuo Kobayashi, Takashi Miura, Kenji Nishiwaki, Makoto Sakamoto, Yoshiyuki Tatsuta
Publikováno v:
Nuclear Physics B, Vol 894, Iss C, Pp 374-406 (2015)
We classify the combinations of parameters which lead three generations of quarks and leptons in the framework of magnetized twisted orbifolds on T2/Z2, T2/Z3, T2/Z4 and T2/Z6 with allowing nonzero discretized Wilson line phases and Scherk–Schwarz
Externí odkaz:
https://doaj.org/article/93208aad59c84aa9a4918e9efc7e2139
Publikováno v:
Nuclear Physics B, Vol 894, Iss C, Pp 268-283 (2015)
We study a three-loop induced neutrino model with a global U(1) symmetry at TeV scale, in which we naturally accommodate a bosonic dark matter candidate. We discuss the allowed regions of masses and quartic couplings for charged scalar bosons as well
Externí odkaz:
https://doaj.org/article/ef29758c12144e41b30fd5c46b2e3e3d