Article
Hints on the quadrupole deformation of the (1232)
Author/s | Fernández Ramírez, C.
Moya de Guerra, E. Udías, J. M. |
Department | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Publication Date | 2006-04-24 |
Deposit Date | 2017-07-11 |
Published in |
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Abstract | 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. |
Funding agencies | Gobierno de España Ministerio de Educación y Ciencia (MEC). España |
Project ID. | UAC2002-0009
BFM2002-03562 BFM2003-04147-C02-01 FIS2005- 00640 |
Citation | 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. |
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