Artículo
Hints on the quadrupole deformation of the (1232)
Autor/es | Fernández Ramírez, C.
Moya de Guerra, E. Udías, J. M. |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2006-04-24 |
Fecha de depósito | 2017-07-11 |
Publicado en |
|
Resumen | The E2/M1 ratio (EMR) of the (1232) is extracted from the world data in pion photoproduction by means of an effective Lagrangian approach (ELA). This quantity has been derived within a crossing symmetric, gauge invariant, ... The E2/M1 ratio (EMR) of the (1232) is extracted from the world data in pion photoproduction by means of an effective Lagrangian approach (ELA). This quantity has been derived within a crossing symmetric, gauge invariant, and chiral symmetric Lagrangian model which also contains a consistent modern treatment of the (1232) resonance. The bare s-channel (1232) contribution is well isolated and final state interactions (FSI) areeffectively taken into account fulfilling Watson’s theorem. The obtained EMR value, EMR=(−1.30±0.52)%, is in good agreement with the latest lattice QCD calculations [Phys. Rev. Lett. 94 , 021601 (2005)] and disagrees with results of current quark model calculations. |
Agencias financiadoras | Gobierno de España Ministerio de Educación y Ciencia (MEC). España |
Identificador del proyecto | UAC2002-0009
BFM2002-03562 BFM2003-04147-C02-01 FIS2005- 00640 |
Cita | Fernández Ramírez, C., Moya de Guerra, E. y Udías, J.M. (2006). Hints on the quadrupole deformation of the (1232). Physical Review C - Nuclear Physics, 73 (4), 042201-1-042201-5. |
Ficheros | Tamaño | Formato | Ver | Descripción |
---|---|---|---|---|
Hints on the quadrupole deformation ... | 141.8Kb | [PDF] | Ver/ | |