Zobrazeno 1 - 10
of 85
pro vyhledávání: '"LI Zuo-Hong"'
We study the $B_s \to \pi^+ \pi^-$ and $B_d \to K^+ K^-$ decays in the standard model and the family non-universal $Z^\prime$ model. Since none of the quarks in final states is the same as the initial quark, these decay modes can occur only via power
Externí odkaz:
http://arxiv.org/abs/1503.00114
Within the QCD factorization approach, we calculate the branching fractions and $CP$ asymmetry parameters of 12 $B \to K_0^*(1430)K^{(*)}$ decay modes under the assumption that the scalar meson $K_0^*(1430)$ is the first excited state or the lowest l
Externí odkaz:
http://arxiv.org/abs/1501.03865
A new estimate is presented of the dileptonic $B$ decays $B\to\pi\ell^+\ell^-(\ell=e,\mu,\tau)$ in naive factorization within the standard-model (SM) framework. Using a combination of several approaches, we investigate the behavior of the $B\to \pi$
Externí odkaz:
http://arxiv.org/abs/1411.0466
B meson semi-leptonic rare decays are sensitive to new physics beyond standard model. We study the $B^{-}\to \pi^{-}\mu^{+}\mu^{-}$ process and investigate the Majorana neutrino contribution to its decay width. The constraints on the Majorana neutrin
Externí odkaz:
http://arxiv.org/abs/1407.2468
Publikováno v:
JHEP 05(2012)160
We present a QCD study on $B, D\to\pi$ semileptonic transitions at zero momentum transfer and an estimate of magnitudes of the associated CKM matrix elements. Light cone sum rules (LCSRs) with chiral correlator are applied to calculate the form facto
Externí odkaz:
http://arxiv.org/abs/1206.0091
Publikováno v:
Phys.Rev.D83:025024,2011
$B_{(s)}$ semi-leptonic decays to the light scalar meson, $B_{(s)}\to S l\bar{\nu}_l, S l \bar{l}\,\,(l=e,\mu,\tau)$, are investigated in the QCD light-cone sum rules (LCSR) with chiral current correlator. Having little knowledge of ingredients of th
Externí odkaz:
http://arxiv.org/abs/1011.3901
Publikováno v:
Phys.Lett.B677:150-156,2009
We make an evaluation of the lepton flavor violating (LFV) decays $\tau \to \ell (V^0, P^0)$, where $\ell=e$ or $\mu$ and $V^0(P^0)$ is a neutral vector (pseudo-scalar) meson, in the context of unparticle physics. The constraints are investigated sys
Externí odkaz:
http://arxiv.org/abs/0901.3266
Publikováno v:
Eur.Phys.J.C60:63-71,2009
The improved light-cone QCD sum rules by using chiral current correlator is systematically reviewed and applied to the calculation of all the heavy-to-light form factors, including all the semileptonic and penguin ones. By choosing suitable chiral cu
Externí odkaz:
http://arxiv.org/abs/0809.0130
Publikováno v:
Int.J.Mod.Phys.A23:3237-3245,2008
Semileptonic $B$($B_s, B_c$) decays are investigated systematically in the light-cone QCD sum rules. Special emphasis is put on the LCSR calculation on weak form factors with an adequate chiral current correlator, which turns out to be particularly e
Externí odkaz:
http://arxiv.org/abs/0801.0473
Publikováno v:
Phys.Lett.B659:598-606,2008
The strong interactions of the negative-parity heavy mesons with $\rho$ meson may be described consistently in the context of an effective lagrangian, which is invariant under isospin SU(2) transformation. Four coupling constants $g_{HH\rho}$, $f_{H^
Externí odkaz:
http://arxiv.org/abs/0712.0429