Zobrazeno 1 - 10
of 258
pro vyhledávání: '"LEITNER, O"'
After a brief review of B_s^0 - \bar B_s^0 oscillations, we discuss the weak decays B_s^0 -> J/\psi\phi and B_s^0 -> J/\psi f_0(980) and the ratio R_{f_0/\phi} of their decay rates in the light of recent measurements by the LHCb, D0 and CDF Collabora
Externí odkaz:
http://arxiv.org/abs/1111.6955
Publikováno v:
Eur.Phys.J.A47:17,2011
The structure of the pion wave function in the relativistic constituent quark model is investigated in the explicitly covariant formulation of light-front dynamics. We calculate the two relativistic components of the pion wave function in a simple on
Externí odkaz:
http://arxiv.org/abs/1009.5484
Publikováno v:
Phys.Rev.D82:076006,2010
The $B_s^0 \to J/\psi \phi$ and $B_s^0 \to J/\psi f_0(980)$ decays are analyzed within generalized QCD factorization including all leading-order corrections in $\alphas$. We point out that the ratio of our calculated widths, $\Gamma (B_s^0\to J/\psi
Externí odkaz:
http://arxiv.org/abs/1003.5980
Publikováno v:
Phys.Rev.D81:094033,2010; Erratum-ibid.D82:119906,2010
Charged and neutral B decays into two charged pions and a charged or a neutral kaon are analyzed within the QCD factorization scheme where final state interactions before and after hadronization are included. The K*(892) and K*(1430) resonance effect
Externí odkaz:
http://arxiv.org/abs/1001.5403
Publikováno v:
Chin.Phys.C34:698-704,2010
We show that a VMD based theoretical input allows for a significantly improved accuracy for the hadronic vacuum polarization of the photon which contributes to the theoretical estimate of the muon g-2. We also show that the only experimental piece of
Externí odkaz:
http://arxiv.org/abs/0912.1248
Publikováno v:
Eur.Phys.J.C68:355-379,2010
Relying on the Hidden Local Symmetry (HLS) model equipped with a mechanism breaking the U(3)/SU(3)/SU(2) symmetries and generating a dynamical vector meson mixing, it has been shown that a global fit successfully describes the cross sections for the
Externí odkaz:
http://arxiv.org/abs/0907.5603
Publikováno v:
Eur.Phys.J.C65:211-245,2010
The HLS Model, equipped with a mechanism providing the breaking of U(3)/SU(3) symmetry and an isospin symmetry breaking leading naturally to vector meson mixing, has been recently shown to successfully account for $e^+ e^- \ra \pi^+\pi^-$ cross secti
Externí odkaz:
http://arxiv.org/abs/0907.4047
Publikováno v:
Phys.Rev.D79:034020,2009
We propose a model for $D^+ \to \pi^+ \pi^- \pi^+$ decays following experimental results which indicate that the two-pion interaction in the $S$-wave is dominated by the scalar resonances $f_0(600)/\sigma$ and $f_0(980)$. The weak decay amplitude for
Externí odkaz:
http://arxiv.org/abs/0812.3843
Publikováno v:
Phys.Rev.D79:076004,2009
A phenomenological analysis of the scalar meson f0(980) is performed that relies on the quasi-two body decays D and Ds -> f0(980)P, with P=pi, K. The two-body branching ratios are deduced from experimental data on D or Ds -> pi pi pi, K Kbar pi and f
Externí odkaz:
http://arxiv.org/abs/0810.5771
Publikováno v:
Eur.Phys.J.C55:199-236,2008
We readdress the problem of finding a simultaneous description of the pion form factor data in e+e- annihilations and in tau decays. For this purpose, we work in the framework of the Hidden Local Symmetry (HLS) Lagrangian and modify the vector meson
Externí odkaz:
http://arxiv.org/abs/0711.4482