Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Urech, Res"'
Autor:
Knecht, Marc, Urech, Res
Publikováno v:
Nucl.Phys.B519:329-360,1998
The low energy scattering of pions is investigated in the presence of electromagnetic interactions at leading order and at next-to-leading order for the amplitudes involving at most one pair of charged pions. The size of the electromagnetic correctio
Externí odkaz:
http://arxiv.org/abs/hep-ph/9709348
Autor:
Mirkes, Erwin, Urech, Res
Publikováno v:
Eur.Phys.J.C1:201-209,1998
Isospin violating signals in the tau -> 3 pi nu_tau decay mode are discussed. For the tau -> pi^- pi^- pi^+ nu_tau decay mode, isospin violation arises from the vector current contribution in the tau -> omega pi nu_tau decay with the subsequent isosp
Externí odkaz:
http://arxiv.org/abs/hep-ph/9702382
Autor:
Baur, Robert, Urech, Res
Publikováno v:
Nucl.Phys. B499 (1997) 319-348
The effective chiral Lagrangian of the strong and electromagnetic interactions of the pseudoscalar mesons at low energies depends on a set of low energy constants. We determine the contributions to the electromagnetic coupling constants at order $O(e
Externí odkaz:
http://arxiv.org/abs/hep-ph/9612328
Publikováno v:
Nucl.Phys.Proc.Suppl. 55C (1997) 325-332
We review a variety of topics related to hadronic structure functions in exclusive semihadronic tau decays. We introduce the concept of structure functions and summarize the most important concepts. We then calculate the decay $\tau \to 3 \pi \nu_\ta
Externí odkaz:
http://arxiv.org/abs/hep-ph/9611329
Autor:
Mannel, Thomas, Urech, Res
Publikováno v:
Z.Phys. C73 (1997) 541-546
We construct an effective Lagrangian for the hadronic decays of a heavy excited $s$-wave-spin-one quarkonium into its ground state. We show that reasonable fits to the measured invariant mass spectra in the $J/\psi$ and $\Upsilon$ systems can be obta
Externí odkaz:
http://arxiv.org/abs/hep-ph/9510406
Autor:
Baur, Robert, Urech, Res
Publikováno v:
Phys.Rev. D53 (1996) 6552-6557
The electromagnetic corrections to the masses of the pseudoscalar mesons $\pi$ and $K$ are considered. We calculate in chiral perturbation theory the contributions which arise from resonances within a photon loop at order $O(e^2 m_q)$. Within this ap
Externí odkaz:
http://arxiv.org/abs/hep-ph/9508393
Autor:
Urech, Res
Publikováno v:
Phys.Lett. B355 (1995) 308-312
In order to calculate the rho - omega mixing we extend the chiral couplings of the low-lying vector mesons in chiral perturbation theory to a lagrangian that contains two vector fields. We determine the momentum dependence of the two-point function a
Externí odkaz:
http://arxiv.org/abs/hep-ph/9504238
Autor:
Mannel, Thomas, Urech, Res
Publikováno v:
Zeitschrift für Physik. C, Particles & Fields; 1997, Vol. 73 Issue 3, p541-546, 6p
Publikováno v:
In Nuclear Physics B (Proceedings Supplements) 1997 55(3):325-332