NAGIOS: RODERIC FUNCIONANDO

Meson resonances at large N(C): Complex poles vs Breit-Wigner masses

Repositori DSpace/Manakin

IMPORTANT: Aquest repositori està en una versió antiga des del 3/12/2023. La nova instal.lació está en https://roderic.uv.es/

Meson resonances at large N(C): Complex poles vs Breit-Wigner masses

Mostra el registre parcial de l'element

dc.contributor.author Nieves Pamplona, Juan Miguel
dc.contributor.author Ruiz Arriola, Enrique
dc.date.accessioned 2014-10-23T07:34:47Z
dc.date.available 2014-10-23T07:34:47Z
dc.date.issued 2009
dc.identifier.citation Nieves Pamplona, Juan Miguel Ruiz Arriola, Enrique 2009 Meson resonances at large N(C): Complex poles vs Breit-Wigner masses Physics Letters B 679 5 449 453
dc.identifier.uri http://hdl.handle.net/10550/39310
dc.description.abstract The rigorous quantum mechanical definition of a resonance requires determining the pole position in the second Riemann sheet of the analytically continued partial wave scattering amplitude in the complex Mandelstam s variable plane. For meson resonances we investigate the alternative Breit-Wigner (BW) definition within the large N-C expansion. By assuming that the pole position is O(N-C(0)) and exploiting unitarity, we show that the BW determination of the resonance mass differs from the pole position by O(N-C(-2)) terms, which can be extracted from pi pi scattering data. For the case of the a (f(0)(600)) pole, the BW scalar mass is predicted to occur at similar to 700 MeV while the true value is located at similar to 800 MeV.
dc.language.iso eng
dc.relation.ispartof Physics Letters B, 2009, vol. 679, num. 5, p. 449-453
dc.subject Física
dc.title Meson resonances at large N(C): Complex poles vs Breit-Wigner masses
dc.type journal article es_ES
dc.date.updated 2014-10-23T07:34:47Z
dc.identifier.doi 10.1016/j.physletb.2009.08.021
dc.identifier.idgrec 068558
dc.rights.accessRights open access es_ES

Visualització       (163.4Kb)

Aquest element apareix en la col·lecció o col·leccions següent(s)

Mostra el registre parcial de l'element

Cerca a RODERIC

Cerca avançada

Visualitza

Estadístiques