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SUMMARY:Studies of medium modifications of light vector mesons in Nuclei
DTSTART;VALUE=DATE-TIME:20090402T140000Z
DTEND;VALUE=DATE-TIME:20090402T150000Z
DTSTAMP;VALUE=DATE-TIME:20261109T162132Z
UID:indico-event-1686@indico.ific.uv.es
DESCRIPTION:The properties of vector mesons\, such as their masses and the
 ir widths\, are predicted to change in dense nuclear matter. Some theoreti
 cal models relate these effects to partial restoration of chiral symmetry 
 at high density or temperature. Photoproduction of vector mesons off nucle
 i were performed at Jefferson Lab using the CEBAF Large Acceptance Spectro
 meter (CLAS). The data were taken with a beam of tagged photons with energ
 ies up to 4 GeV on various nuclear targets. The properties of the rho vect
 or mesons were investigated via their rare leptonic decay to e+e-. This de
 cay channel is preferred over hadronic modes in order to eliminate final s
 tate interactions in the nuclear matter. The combinatorial background in t
 he mass spectrum was removed by a self-normalizing mixed-event technique. 
 The rho meson mass distributions were extracted for each of the targets. S
 tatistically significant results regarding medium modification of the rho 
 meson in the nuclear medium rule out large medium effects. Transparency st
 udies of the omega and phi vector mesons allows a determination of their w
 idths in the medium.\n\nhttps://indico.ific.uv.es/event/1686/
LOCATION:Edf. Institutos de Investigación Sala Seminarios IFIC
URL:https://indico.ific.uv.es/event/1686/
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