phi ->pi(+)pi(-) decay within a chiral unitary approach
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phi ->pi(+)pi(-) decay within a chiral unitary approach

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Degut a la parada de sistemes pevista a la Universitat de València del 19 al 22 de Gener, Roderic també romadrá fora de servei des del 19 a les 21:00 hores fins al 22 a les 17:00 hores. Disculpeu les molèsties. _______________________________________________________________________________________ Debido a la parada de sistemas prevista en la Universitat de València del 19 al 22 de Enero, Roderic también permanecerá fuera de servicio desde el 19 a las 21:00 hasta el 22 a las 17:00. Disculpen las molestias.

phi ->pi(+)pi(-) decay within a chiral unitary approach

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Oller Berber, José Antonio; Oset Báguena, Eulogio Perfil; Peláez Sagredo, José Ramón
Aquest document és un/a article, creat/da en: 2000
Starting from the Chiral Perturbation Theory Lagrangian, but keeping different masses for the charged and neutral mesons, and using a previously developed non-perturbative unitary scheme that generates the lightest meson-meson resonances, we construct K Kbar to K Kbar and K Kbar to pi+ pi- in the vector channel. This allows us to obtain the kaon-loop contribution to the phi-rho mixing and study the phi to pi+pi- decay. The dominant contribution to this decay comes from the phi to gamma to pi+pi- process. However, there can be large interferences with the subdominant contributions coming from phi-rho and phi-omega mixing, or of these two contributions among themselves. As a consequence, a reliable measurement of phi to pi+pi- decay could be used to differentiate between some phi-omega mixing scenarios proposed in the literature.

    Oller Berber, José Antonio Oset Báguena, Eulogio Peláez Sagredo, José Ramón 2000 phi ->pi(+)pi(-) decay within a chiral unitary approach Physical Review D 62 11 114017
http://dx.doi.org/10.1103/PhysRevD.62.114017
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