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Título

The width of the omega meson in the nuclear medium

Autor Ramos, Àngels; Tolós, Laura; Molina, Raquel ; Oset, Eulogi
Palabras clave Heavy-Ion Collisions
Chiral Perturbation-Theory
Hidden Local Symmetry
Fecha de publicación 26-nov-2013
EditorSpringer
Citación European Physical Journal A (49);11 (2013)
ResumenWe evaluate the width of the omega meson in nuclear matter. We consider the free decay mode of the omega into three pions, which is dominated by rho IEuro decay, and replace the rho and pi propagators by their medium-modified ones. We also take into account the quasielastic and inelastic processes induced by a vector-baryon interaction dominated by vector meson exchange, as well as the contributions coming from the mechanism with medium-modified K , propagators. We obtain a substantial increase of the omega width in the medium, reaching a value of 121 +/- 10 MeV at normal nuclear matter density for an omega at rest, which comes mainly from omega N -> pi pi N, omega NN -> pi NN processes associated to the dominant omega -> rho IEuro decay mode. The value of the width increases moderately with momentum, reaching values of around 200MeV at 600MeV/c.
Versión del editorhttp://dx.doi.org/10.1140/epja/i2013-13148-x
URI http://hdl.handle.net/10261/108615
DOI10.1140/epja/i2013-13148-x
ISSN1434-6001
E-ISSN1434-601X
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