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Lowest resonance in QCD from low-energy data
dc.contributor.author | Ametller Congost, Lluís |
dc.contributor.author | Talavera Sánchez, Pedro |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear |
dc.date.accessioned | 2014-05-21T12:02:41Z |
dc.date.available | 2014-05-21T12:02:41Z |
dc.date.created | 2014-05-12 |
dc.date.issued | 2014-05-12 |
dc.identifier.citation | Ametller, L.; Talavera, P. Lowest resonance in QCD from low-energy data. "Physical review. D, Particles, fields, gravitation, and cosmology", 12 Maig 2014, vol. 9, núm. 89, p. 096004-1-096004-8. |
dc.identifier.issn | 1550-7998 |
dc.identifier.uri | http://hdl.handle.net/2117/23029 |
dc.description.abstract | We worked out a generalization of su(2) chiral perturbation theory, including a perturbative singlet scalar field. The approach suggests that the prediction for sensible low-energy observables converge faster towards their physical value. The physical mass and width of the scalar particle are obtained through a simultaneous analysis of the pion vector form factor and the ¿¿¿p 0 p 0 cross section. Both values are statistically consistent with the ones obtained by using Roy equations in p-p scattering. In addition we find indications that the photon-photon-singlet coupling is quite small. |
dc.language.iso | eng |
dc.publisher | American Physical Society |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Física |
dc.subject.lcsh | Particles (Nuclear physics)--Chirality |
dc.subject.other | QCD low-energy scalar resonance |
dc.title | Lowest resonance in QCD from low-energy data |
dc.type | Article |
dc.subject.lemac | Quiralitat |
dc.contributor.group | Universitat Politècnica de Catalunya. SC-SIMBIO - Sistemes complexos. Simulació discreta de materials i de sistemes biològics |
dc.contributor.group | Universitat Politècnica de Catalunya. GAA - Grup d'Astronomia i Astrofísica |
dc.identifier.doi | 10.1103/PhysRevD.89.096004 |
dc.relation.publisherversion | http://link.aps.org/doi/10.1103/PhysRevD.89.096004 |
dc.rights.access | Open Access |
local.identifier.drac | 14886592 |
dc.description.version | Postprint (published version) |
local.citation.author | Ametller, L.; Talavera, P. |
local.citation.publicationName | Physical review. D, Particles, fields, gravitation, and cosmology |
local.citation.volume | 9 |
local.citation.number | 89 |
local.citation.startingPage | 096004-1 |
local.citation.endingPage | 096004-8 |
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