Zobrazeno 41 - 50
of 563
pro vyhledávání: '"Geng, C. Q."'
Autor:
Geng, C. Q., Hsiao, Y. K.
We study the four-body semileptonic baryonic decay of $B^-\to \Lambda\bar p\nu\bar \nu$ in the standard model. We find that the decay branching ratio is $(7.9\pm 1.9)\times 10^{-7}$. Similar to the rare decays of $B^-\to K^{(*)-}\nu\bar \nu$, this ba
Externí odkaz:
http://arxiv.org/abs/1204.4771
Autor:
Geng, C. Q., Hsiao, Y. K.
We examine the three-body baryonic $\bar B\to {\bf B\bar B'}V$ decays with $V$ vector mesons in the standard model. We can simultaneously explain the recent experimental data on the decays of $B^-\to \Lambda\bar p \,\rho^0$ and $\bar B\to \Lambda\bar
Externí odkaz:
http://arxiv.org/abs/1109.3032
Publikováno v:
Int. J. Mod. Phys. D20, 1433-1440 (2011)
In this talk, we will review the signatures of dark matter in two inert triplet models. For the first model with the hypercharge Y=0, the dark matter mass around 5.5 TeV is favored by both the WMAP data and the direct detection. In contrast, for the
Externí odkaz:
http://arxiv.org/abs/1108.2753
We investigate the generation of large-scale magnetic fields due to the breaking of the conformal invariance in the electromagnetic field through the $CPT$-even dimension-six Chern-Simons-like effective interaction with a fermion current by taking ac
Externí odkaz:
http://arxiv.org/abs/1108.0151
Autor:
Geng, C. Q., Hsiao, Y. K.
Publikováno v:
Physics Letters B704, 495 (2011)
We study the four-body exclusive semileptonic baryonic $\bar B$ decays of $B^-\to p\bar p \ell^- \bar\nu_{\ell}$ ($\ell=e,\mu,\tau$) in the standard model. We find that their decay branching ratios are about $(1.0, 1.0,0.5)\times 10^{-4}$, respective
Externí odkaz:
http://arxiv.org/abs/1107.0801
Publikováno v:
Phys.Rev.D83:075014,2011
We study the inert triplet models, in which the standard model (SM) is extended to have a new SU(2)L triplet scalar (Y=0 or 2) with an Z2 symmetry. We show that the neutral component of the triplet can be a good dark matter candidate. In particular,
Externí odkaz:
http://arxiv.org/abs/1102.4906
Autor:
Geng, C. Q., Ho, Shih-Hao
Publikováno v:
Eur. Phys. J. C (2011)71,1738
To localize the scalar, fermion, and abelian gauge fields on our 3-brane, a simple mechanism with a hypothetical "magnetic field" in the bulk is proposed. This mechanism is to treat all fields in the equal footing without ad hoc consideration. In add
Externí odkaz:
http://arxiv.org/abs/1101.4710
Cosmological birefringence due to CPT-even Chern-Simons-like term with Kalb-Ramond and scalar fields
We study the CPT-even dimension-six Chern-Simons-like term by including dynamical Kalb-Ramond and scalar fields to examine the cosmological birefringence. We show that the combined effect of neutrino current and Kalb-Ramond field could induce a sizab
Externí odkaz:
http://arxiv.org/abs/1008.0486
Autor:
Araki, Takeshi, Geng, C. Q.
Publikováno v:
Phys.Lett.B694:113-118,2010
We study the Zee-Babu two-loop neutrino mass generation model and look for a possible flavor symmetry behind the tri-bimaximal neutrino mixing. We find that there probably exists the mu-tau symmetry in the case of the normal neutrino mass hierarchy,
Externí odkaz:
http://arxiv.org/abs/1006.0629
Autor:
Chen, Chian-Shu, Geng, C. Q.
Publikováno v:
Phys.Rev.D82:105004,2010
We study a model with Majorana neutrino masses generated through doubly charged scalars at two-loop level. We give explicit relationships between the neutrino masses and the same sign dilepton decays of the doubly charged scalars. In particular, we d
Externí odkaz:
http://arxiv.org/abs/1005.2817