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The N*(1520)->Delta pi amplitudes extracted from the gamma p->pi(+)pi(-)p reaction and comparison to quark models
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The N*(1520)->Delta pi amplitudes extracted from the gamma p->pi(+)pi(-)p reaction and comparison to quark models
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| Gómez Tejedor, José Antonio; Cano Vargas, Florencio; Oset Báguena, Eulogio Perfil | |||
| This document is a artículoDate1996 | |||
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Este documento está disponible también en : http://hdl.handle.net/10550/47020 |
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| The gamma p ---> pi+ pi- p reaction, in combination with data from the pi N ---> pi pi N reaction, allows one to obtain the s- and d-wave amplitudes for the N*(1520) decay into Delta pi with absolute sign with respect to the N*(1520) ---> N gamma helicity amplitudes. In addition one obtains the novel information on the q dependence of the amplitudes. This dependence fits exactly with the predictions of the non-relativistic constituent quark models. The absolute values provided by these models agree only qualitatively, and a discussion is done on the reasons for it and possible ways to improve. | |||
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Gómez Tejedor, José Antonio Cano Vargas, Florencio Oset Báguena, Eulogio 1996 The N*(1520)->Delta pi amplitudes extracted from the gamma p->pi(+)pi(-)p reaction and comparison to quark models Physics Letters B 379 1-4 29 34 |
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| http://dx.doi.org/10.1016/0370-2693(96)00404-2 |
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