NAGIOS: RODERIC FUNCIONANDO

Helicity amplitudes of the Lambda(1670) and two Lambda(1405) as dynamically generated resonances

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/

Helicity amplitudes of the Lambda(1670) and two Lambda(1405) as dynamically generated resonances

Mostra el registre parcial de l'element

dc.contributor.author Döring, Michael
dc.contributor.author Jido, D.
dc.contributor.author Oset Báguena, Eulogio
dc.date.accessioned 2015-08-20T11:12:14Z
dc.date.available 2015-08-20T11:12:14Z
dc.date.issued 2010
dc.identifier.citation Döring, Michael Jido, D. Oset Báguena, Eulogio 2010 Helicity amplitudes of the Lambda(1670) and two Lambda(1405) as dynamically generated resonances European Physical Journal A 45 3 319 333
dc.identifier.uri http://hdl.handle.net/10550/46711
dc.description.abstract We determine the helicity amplitudes A_1/2 and radiative decay widths in the transition Lambda(1670) to gamma Y (Y=Lambda or Sigma^0). The Lambda(1670) is treated as a dynamically generated resonance in meson-baryon chiral dynamics. We obtain the radiative decay widths of the Lambda(1670) to gamma Lambda as 3 \pm 2 keV and to gamma Sigma^0 as 120 \pm 50 keV. Also, the Q^2 dependence of the helicity amplitudes A_1/2 is calculated. We find that the K Xi component in the Lambda(1670) structure, mainly responsible for the dynamical generation of this resonance, is also responsible for the significant suppression of the decay ratio Gamma_{gamma Lambda}/Gamma_{gamma Sigma^0}. A measurement of the ratio would, thus, provide direct access to the nature of the Lambda(1670). To compare the result for the Lambda(1670), we calculate the helicity amplitudes A_1/2 for the two states of the Lambda(1405). Also, the analytic continuation of Feynman parameterized integrals of more complicated loop amplitudes to the complex plane is developed which allows for an internally consistent evaluation of A_1/2.
dc.language.iso eng
dc.relation.ispartof European Physical Journal A, 2010, vol. 45, num. 3, p. 319-333
dc.subject Física
dc.title Helicity amplitudes of the Lambda(1670) and two Lambda(1405) as dynamically generated resonances
dc.type journal article es_ES
dc.date.updated 2015-08-20T11:12:14Z
dc.identifier.doi 10.1140/epja/i2010-11015-0
dc.identifier.idgrec 061753
dc.rights.accessRights open access es_ES

Visualització       (561.1Kb)

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