The amplitudes extracted from the γp → π+π−p reaction and comparison to quark models

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. -->
ISSN: 0370-2693
DOI: 10.1016/0370-2693(96)00404-2
Přístupová URL adresa: https://explore.openaire.eu/search/publication?articleId=doi_________::ffefc7ecea3bc4638b0712dd0e3df8ec
https://doi.org/10.1016/0370-2693(96)00404-2
Rights: OPEN
Přírůstkové číslo: edsair.doi...........ffefc7ecea3bc4638b0712dd0e3df8ec
Autor: F. Cano, Eulogio Oset, J. A. Gómez Tejedor
Rok vydání: 1996
Předmět:
Zdroj: Physics Letters B. 379:39-44
ISSN: 0370-2693
DOI: 10.1016/0370-2693(96)00404-2
Popis: 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.
Databáze: OpenAIRE
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