Zobrazeno 1 - 10
of 640
pro vyhledávání: '"Fuchs, N"'
Publikováno v:
In Hand Surgery and Rehabilitation May 2020 39(3):186-192
Publikováno v:
Eur.Phys.J. C34 (2004) 201-227
Due to its light mass of order Lambda_QCD, the strange quark can play a special role in Chiral Symmetry Breaking (ChSB): differences in the pattern of ChSB in the limits N_f=2 (m_u,m_d->0, m_s physical) and N_f=3 (m_u,m_d,m_s->0) may arise due to vac
Externí odkaz:
http://arxiv.org/abs/hep-ph/0311120
Publikováno v:
Eur.Phys.J.C24:469-483,2002
The recently published E865 data on charged K_e4 decays and Pi-Pi phases are reanalyzed to extract values of the two S-wave scattering lengths, of the subthreshold parameters alpha and beta, of the low-energy constants l3-bar and l4-bar as well as of
Externí odkaz:
http://arxiv.org/abs/hep-ph/0112088
Publikováno v:
Phys.Rev. D62 (2000) 033003
The form factors for the $K_{\ell 3}$ semileptonic decay are computed to order $O(p^4)$ in generalized chiral perturbation theory. The main difference with the standard $O(p^4)$ expressions consists in contributions quadratic in quark masses, which a
Externí odkaz:
http://arxiv.org/abs/hep-ph/0001188
Publikováno v:
Phys.Lett. B418 (1998) 223-228
Instanton contributions to pseudoscalar finite-energy sum rules are extracted from the explicit single-instanton contribution to the pseudoscalar Laplace sum rule in the instanton liquid model.
Comment: 10 pages, LaTeX, 2 postscript figures
Comment: 10 pages, LaTeX, 2 postscript figures
Externí odkaz:
http://arxiv.org/abs/hep-ph/9710352
Publikováno v:
Nucl.Phys. B471 (1996) 445-470
The chiral expansion of the $\pi\pi$ amplitude to the order of two loops was expressed in terms of six independent parameters in a previous paper: four of these are shown here to satisfy sum rules. Their derivation, where crossing symmetry plays a ke
Externí odkaz:
http://arxiv.org/abs/hep-ph/9512404
Publikováno v:
Nucl.Phys. B457 (1995) 513-576
The low-energy $\pi\pi$ amplitude is computed explicitly to two-loop accuracy in the chiral expansion. It depends only on six independent (combinations of) low-energy constants which are not fixed by chiral symmetry. Four of these constants are deter
Externí odkaz:
http://arxiv.org/abs/hep-ph/9507319
A method of indirect measurement of the light quark running mass $\hat{m} = (m_d + m_u)/2$ is elaborated in detail. It is based on measuring 1\%-level azimuthal angular asymmetries in the decay $\tau \rightarrow \nu_\tau + 3\pi$. The latter are then
Externí odkaz:
http://arxiv.org/abs/hep-ph/9310299
Publikováno v:
Phys.Lett. B313 (1993) 229-233
$K\pi$ scattering and $K_{\mu 4}$ decays are studied at leading order of improved chiral perturbation theory. It is shown that high precision $K_{\mu 4}$ experiments at, e.g., DA$\Phi$NE should allow for a direct measurement of the quark mass ratio $
Externí odkaz:
http://arxiv.org/abs/hep-ph/9305332
Publikováno v:
Phys.Rev. D47 (1993) 3814-3838
We describe a rearrangement of the standard expansion of the symmetry breaking part of the QCD effective Lagrangian that includes into each order additional terms which in the standard chiral perturbation theory ($\chi$PT) are relegated to higher ord
Externí odkaz:
http://arxiv.org/abs/hep-ph/9301244