Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Ynduráin, F. J."'
Publikováno v:
Phys.Rev.D83:074004,2011
We improve our description of pion-pion scattering data by imposing additional requirements to our previous fits, in the form of once-subtracted Roy-like equations, while extending our analysis up to 1100 MeV. We provide simple and ready to use param
Externí odkaz:
http://arxiv.org/abs/1102.2183
We report our progress on the data analysis of $\pi\pi$ scattering data in terms of Forward Dispersion Relations (FDR), as well as Roy equations (RE) and their once-subtracted counterpart, GKPY equations. The first part of the analysis consists of in
Externí odkaz:
http://arxiv.org/abs/0906.5467
Once and twice subtracted crossing symmetric dispersion relations applied to $\pi\pi \to \pi\pi$ scattering data are analyzed and compared. Both sets of dispersion relations can be used to test the $\pi\pi$ amplitudes in low partial waves up to about
Externí odkaz:
http://arxiv.org/abs/0905.2139
Publikováno v:
Nucl.Phys.Proc.Suppl.186:312-317,2009
This talk is dedicated to the memory of Paco Yndurain, the original speaker in the conference. After a short account of his scientific career, we briefly review our ongoing collaboration to determine precisely the $\pi\pi$ scattering amplitude includ
Externí odkaz:
http://arxiv.org/abs/0810.2204
Publikováno v:
Int.J.Mod.Phys.A24:402-409,2009
We present a set of once subtracted dispersion relations which implement crossing symmetry conditions for the $\pi\pi$ scattering amplitudes below 1 GeV. We compare and discuss the results obtained for the once and twice subtracted dispersion relatio
Externí odkaz:
http://arxiv.org/abs/0809.4766
Publikováno v:
AIPConf.Proc.1030:257-262,2008
We review our recent analysis of pion-pion scattering data in terms of Roy equations and Forward Dispersion Relations, and present some preliminary results in terms of a new set of once-subtracted coupled equations for partial waves. The first analys
Externí odkaz:
http://arxiv.org/abs/0804.2632
Autor:
Davies, C., Faccini, S., Lipkin, H., Maiani, L., Yndurain, F. J., Bugg, ; C., Eidelman, S., Faccioli, P., Glazek, S., Glozman, Y., Klempt, E., Koch, H., Lee-Franzini, J., Mussa, R., Pallante, E., Paul, S., Seth, K., Wiedner, U., Lombardo, ; M. P., Miscetti, S., Pacetti, S.
Publikováno v:
Frascati Phys.Ser.46:,2007
A round table held during the Hadron07 Conference focusing on experimental observations of new hadronic states, on theoretical perspectives for their description, and on the role of hadronic spectroscopy in furthering our knowledge of the fundamental
Externí odkaz:
http://arxiv.org/abs/0803.2368
Publikováno v:
Phys.Rev.D77:054015,2008
We complete and improve the fits to experimental $\pi\pi$ scattering amplitudes, both at low and high energies, that we performed in the previous papers of this series. We then verify that the corresponding amplitudes satisfy analyticity requirements
Externí odkaz:
http://arxiv.org/abs/0710.1150
Autor:
Yndurain, F. J.
\noindent 1. Generalities\hfil\break 2. Lie groups and Lie algebras\hfil\break 3. The unitary groups\hfil\break 4. Representations of the SU(n) groups (and of their algebras)\hfil\break 5. The tensor method for unitary groups, and\hb the permutation
Externí odkaz:
http://arxiv.org/abs/0710.0468
Autor:
Adler, Stephen L., Yndurain, F. J.
Publikováno v:
Phys.Rev.D75:116002,2007
We consider the sum rule proposed by one of us (SLA), obtained by taking the expectation value of an axial vector commutator in a state with one pion. The sum rule relates the pion decay constant to integrals of pion-pion cross sections, with one pio
Externí odkaz:
http://arxiv.org/abs/0704.1201