RT Book, Section
T1 Precise analysis of π π scattering data from Roy equations and forward dispersion relations
A1 Peláez Sagredo, José Ramón
A1 Garcia Martin, R.
A1 Kamiński, Robert
A1 Ynduráin, F. J.
AB We review our recent analysis of ππ scattering data in terms of Roy equations and Forward Dispersion  Relations, and present some preliminary results in terms of a new set of oncesubtracted coupled equations for partial waves. The first analysis consists of independent fits to the different ππ channels that satisfies rather well the dispersive representation. In the second analysis we constrain the fit with the dispersion relations. The latter provides a very precise and model independent description of data using just analyticity, causality and crossing.
PB Amer Inst Physics
SN 978-0-7354-0899-9
YR 2008
FD 2008
LK https://hdl.handle.net/20.500.14352/53481
UL https://hdl.handle.net/20.500.14352/53481
LA eng
NO 1. J. Gasser and H. Leutwyler, Annals Phys. 158, 142 (1984). 2. J. R. Batley et al. [NA48/2 Collaboration], Eur. Phys. J. C 54 (2008) 411. S. Pislak et al. [BNL-E865 Collaboration], Phys. Rev. Lett. 87 (2001) 221801 [arXiv:hep- ex/0106071]. 3. S. M. Roy, Phys. Lett. B 36, 353 (1971). 4. G. Colangelo,J. Gasser and H. Leutwyler, Nucl. Phys. B 603 (2001) 125 B. Ananthanarayan, G. Colangelo, J. Gasser and H. Leutwyler, Phys. Rept. 353 (2001) 207 5. J. R. Peláez and F. J. Ynduráin, Nucl. Phys. Proc. Suppl. 164 (2007) 93; Phys. Rev. D 68 (2003) 074005 6. I. Caprini, G. Colangelo, J. Gasser and H. Leutwyler, Phys. Rev. D 68 (2003) 074006 7. R. Kaminski, L. Lesniak and B. Loiseau, Phys. Lett. B 551, 241 (2003) 8. S. Descotes-Genon, N. H. Fuchs, L. Girlanda and J. Stern, Eur. Phys. J. C 24, 469 (2002) 9. R. Kaminski, J. R. Peláez and F. J. Ynduráin, Phys. Rev. D 77 (2008) 054015; Phys. Rev. D 74 (2006) 014001 10. R. García-Martín and J. R. Peláez, F. J. Ynduráin, Phys. Rev. D 76 (2007) 074034 J. R. Peláez and F. J. Ynduráin, Phys. Rev. D 71 (2005) 074016; Phys. Rev. D 69 (2004) 114001
NO ISSN: 0094-243X©2008 American Institute of Physics.Workshop on Scalar Mesons and Related Topics (2008. Lisboa, Portugal).J.R.P. thanks the organizers for creating such a stimulating conference.
DS Docta Complutense
RD 7 may 2024