Zobrazeno 1 - 10
of 118
pro vyhledávání: '"Gasser, Jürg A."'
Autor:
Gasser, Juerg, Rusetsky, Akaki
Publikováno v:
Eur.Phys.J. C78 (2018) no.11, 906
A dispersive analysis of $\eta\to 3\pi$ decays has been performed in the past by many authors. The numerical analysis of the pertinent integral equations is hampered by two technical difficulties: i) The angular averages of the amplitudes need to be
Externí odkaz:
http://arxiv.org/abs/1809.06399
Autor:
Imenez Silva, Pedro Henrique, Katamesh-Benabbas, Chahira, Chan, Kessara, Pastor Arroyo, Eva Maria, Knöpfel, Thomas, Bettoni, Carla, Ludwig, Marie-Gabrielle, Gasser, Jürg A., Brandao-Burch, Andrea, Arnett, Timothy R., Bonny, Olivier, Seuwen, Klaus, Wagner, Carsten Alexander
Publikováno v:
In Kidney International May 2020 97(5):920-933
Publikováno v:
Nucl.Phys.B850:96-147,2011
Based on the analysis of 6.031*10^7 K+- --> pi0 pi0 pi+- decays, the NA48/2 collaboration has recently determined the S-wave pi-pi scattering lengths a_0-a_2 with high precision. In addition, the scattering length a_2 has been independently measured,
Externí odkaz:
http://arxiv.org/abs/1103.4273
Publikováno v:
PoS CD09:089,2009
Chiral perturbation theory in the two--flavour sector allows one to analyse Green functions in QCD in the limit where the strange quark mass is considered to be large in comparison to the external momenta and to the light quark masses m_u and m_d. In
Externí odkaz:
http://arxiv.org/abs/0910.4880
Publikováno v:
Phys.Lett.B675:49-53,2009
Chiral perturbation theory in the two-flavour sector allows one to analyse Green functions in QCD in a limit where the strange quark mass is considered to be large in comparison to the external momenta and to the light quark masses. In this framework
Externí odkaz:
http://arxiv.org/abs/0903.0801
Publikováno v:
Eur.Phys.J.C59:777-793,2009
Data on Ke4 decays allow one to extract experimental information on the elastic pi pi scattering amplitude near threshold, and to confront the outcome of the analysis with predictions made in the framework of QCD. These predictions concern an isospin
Externí odkaz:
http://arxiv.org/abs/0811.0775
Publikováno v:
Eur.Phys.J.C50:557-571,2007
We re-investigate the radiative charged kaon decay K+- --> pi0 e+- nu_e gamma in chiral perturbation theory, merging the chiral expansion with Low's theorem. We thoroughly analyze the precision of the predicted branching ratio relative to the non-rad
Externí odkaz:
http://arxiv.org/abs/hep-ph/0611366
Publikováno v:
Phys.Lett.B638:187-194,2006
The pion mass difference generates a pronounced cusp in K --> 3 pi decays. As has recently been pointed out by Cabibbo and Isidori, an accurate measurement of the cusp may allow one to pin down the S-wave pi pi scattering lengths to high precision. H
Externí odkaz:
http://arxiv.org/abs/hep-ph/0604084
Publikováno v:
Nucl.Phys. B745 (2006) 84-108
We complete the recalculation of the available two-loop expressions for the reaction \gamma\gamma->\pi\pi in the framework of chiral perturbation theory. Here, we present the results for charged pions. The cross section and the values of the dipole p
Externí odkaz:
http://arxiv.org/abs/hep-ph/0602234
Publikováno v:
Nucl.Phys.B728:31-54,2005
In view of ongoing experimental activities to determine the pion polarizabilities, we have started to recalculate the available two-loop expressions in the framework of chiral perturbation theory, because they have never been checked before. We make
Externí odkaz:
http://arxiv.org/abs/hep-ph/0506265