Zobrazeno 1 - 10
of 176
pro vyhledávání: '"Ladisa, M."'
Publikováno v:
Phys. Rev. Lett. 101, 226405 (2008)
We present an {\it ab initio} many-body GW calculation of the self-energy, the quasiparticle band plot and the spectral functions in free-standing undoped graphene. With respect to other approaches, we numerically take into account the full ionic and
Externí odkaz:
http://arxiv.org/abs/0806.3365
Precise knowledge of X-ray diffraction profile shape is crucial in the investigation of the properties of matter in crystals powder. Line-broadening analysis is a pre-processing step in most of the full powder pattern fitting softwares. Final result
Externí odkaz:
http://arxiv.org/abs/math/0504171
A filter based on the Hankel Lanczos Singular Value Decomposition (HLSVD) technique is presented and applied for the first time to X-ray diffraction (XRD) data. Synthetic and real powder XRD intensity profiles of nanocrystals are used to study the fi
Externí odkaz:
http://arxiv.org/abs/math/0502539
Publikováno v:
J. Appl. Cryst. (2005). 38, 685-687
A new procedure aiming at disentangling the instrumental profile broadening and the relevant X-ray powder diffraction (XRPD) profile shape is presented. The technique consists of three steps: denoising by means of wavelet transforms, background suppr
Externí odkaz:
http://arxiv.org/abs/cond-mat/0502582
Publikováno v:
Phys. Rev. B 72, 35412 (2005)
The increasing scientific and technological interest in nanoparticles has raised the need for fast, efficient and precise characterization techniques. Powder diffraction is a very efficient experimental method, as it is straightforward and non-destru
Externí odkaz:
http://arxiv.org/abs/cond-mat/0502583
Publikováno v:
Phys.Rev.D68:114001,2003
We evaluate the decays B => K* pi, K (rho,omega,phi) adding the long distance charming penguin contributions to the short distance: Tree+Penguin amplitudes. We estimate the imaginary part of the charming penguin by an effective field theory inspired
Externí odkaz:
http://arxiv.org/abs/hep-ph/0307367
Publikováno v:
Phys.Rev. D67 (2003) 054022
We evaluate the form factors describing the semileptonic decays $\bar{B^0}\to J/\psi (\eta_c) D^+ \ell^- \bar \nu_\ell$, within the framework of a QCD relativistic potential model. This decay is complementary to $\bar{B^0}\to J/\psi (\eta_c) D^+ \pi^
Externí odkaz:
http://arxiv.org/abs/hep-ph/0112011
Publikováno v:
Phys.Rev. D65 (2002) 094005
We present estimates of the charming penguin contribution to B => K pi, pi pi,K eta, K eta' decays due to intermediate charmed meson states. We find that this contribution is indeed significant for B => K pi decays, and its inclusion, together with t
Externí odkaz:
http://arxiv.org/abs/hep-ph/0110411
Publikováno v:
Phys.Rev.D64:014029,2001
We present calculations of the charming-penguin long-distance contributions to B => K \pi decays due to intermediate charmed meson states. Our calculation is based on the Chiral Effective Lagrangean for light and heavy mesons, corrected for the hard
Externí odkaz:
http://arxiv.org/abs/hep-ph/0101118
Publikováno v:
Phys.Rev.D62:114011,2000
We reconsider two classical proposals for the determination of the angle gamma of the unitarity triangle: B^\pm => chi_{c0} \pi^\pm => \pi^+\pi^-\pi^\pm and B_s => rho^0 K_S => \pi^+ \pi^- K_S. We point out the relevance, in both cases, of non resona
Externí odkaz:
http://arxiv.org/abs/hep-ph/0007059