Zobrazeno 1 - 10
of 169
pro vyhledávání: '"Melic, B."'
We study the photoproduction of the vector mesons $\Phi$ and $J/\Psi$ off a proton in the kinematical regime of large energies and scattering angles within the framework of perturbative QCD. Our investigations are based on the hard scattering approac
Externí odkaz:
http://arxiv.org/abs/1411.0904
We present a detailed investigation of the NLO polarization of the top quark in t t-bar production at a polarized linear e^+ e^- collider with longitudinally polarized beams. By appropiately tuning the polarization of the beams one can achieve close
Externí odkaz:
http://arxiv.org/abs/1209.0547
Publikováno v:
Phys.Rev.D83:054018,2011
We discuss in detail top quark polarization in above-threshold (t \bar t)-production at a polarized linear e^+ e^- collider. We pay particular attention to the minimization and maximization of the polarization of the top quark by tuning the longitudi
Externí odkaz:
http://arxiv.org/abs/1012.4600
Publikováno v:
Phys.Rev.D80:116003,2009
Within the Standard model with the 4th generation quarks b' and t' we have analyzed CP-violating flavor changing neutral current processes t -> cX; b'-> sX, b'-> bX,t'-> cX, and t'-> tX, with X=Z,H,gamma,g, by constructing and employing global, uniqu
Externí odkaz:
http://arxiv.org/abs/0909.3227
Autor:
Duplancic, G., Melic, B.
Publikováno v:
Phys.Rev.D78:054015,2008
We present an improved QCD light-cone sum rule (LCSR) calculation of the B -> K and Bs -> K form factors, by including SU(3)-symmetry breaking corrections. We use recently updated K-meson distribution amplitudes which incorporate the complete SU(3)-b
Externí odkaz:
http://arxiv.org/abs/0805.4170
Publikováno v:
JHEP 0804:014,2008
We reconsider and update the QCD light-cone sum rules for $B\to \pi$ form factors. The gluon radiative corrections to the twist-2 and twist-3 terms in the correlation functions are calculated. The $\bar{MS}$ $b$-quark mass is employed, instead of the
Externí odkaz:
http://arxiv.org/abs/0801.1796
Publikováno v:
Prog.Part.Nucl.Phys.61:173-174,2008
We calculate the leading-order perturbative contribution to $\gamma p \to M_{V} p$, with $M_V$ being a $\Phi$ or $J/\Psi$ meson, in the kinematic region of large energy and scattering angle.
Comment: 2 pages, 2 figures, Talk presented at "Intern
Comment: 2 pages, 2 figures, Talk presented at "Intern
Externí odkaz:
http://arxiv.org/abs/0711.3973
Publikováno v:
Phys.Rev.D72:094012,2005
Using the method of QCD light-cone sum rules, we calculate the $B \to \pi\pi$ hadronic matrix elements with annihilation topology. We obtain a finite result, including the related strong phase. Numerically, the annihilation effects in $B\to \pi\pi$ t
Externí odkaz:
http://arxiv.org/abs/hep-ph/0509049
Publikováno v:
Phys.Rev. D72 (2005) 057502
We propose the K -> pi gamma decay mode as a signature of the violation of the Lorentz invariance and the appearance of new physics via space-time noncommutativity.
Comment: 3 pages, 1 figure included, version to appear in Phys. Rev. D
Comment: 3 pages, 1 figure included, version to appear in Phys. Rev. D
Externí odkaz:
http://arxiv.org/abs/hep-ph/0507231
Publikováno v:
Phys.Rev. D72 (2005) 054004
In this article we propose standard model strictly forbidden decay modes, quarkonia (QQ(1^{--}) = J/psi, Upsilon) decays into two photons, as a possible signature of the space-time non-commutativity. An experimental discovery of J/psi -> gamma gamma
Externí odkaz:
http://arxiv.org/abs/hep-ph/0503133