Evidence for in-medium modification of the $φ$ meson at normal nuclear density

Details Evidence for in-medium modification of the $φ$ meson at normal nuclear density Evidence for in-medium modification of the $φ$ meson at normal nuclear density

2005-11-08

arxiv.org/abs/nucl-ex/0511019v6

Phys.Rev.Lett.98:042501,2007

Physics

Nuclear Physics

Nuclear Experiment

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.98.042501

Invariant mass spectra of e+e- pairs have been measured in 12 GeV p+A reactions to detect possible in-medium modification of vector mesons. Copper and carbon targets are used to study the nuclear-size dependence of e+e- invariant mass distributions. A significant excess on the low-mass side of the phi meson peak is observed in the low beta gamma (=beta/sqrt(1-beta^2)) region of phi mesons (beta gamma < 1.25) with copper targets. However, in the high beta gamma region (beta gamma > 1.25), spectral shapes of phi mesons are well described by the Breit-Wigner shape when experimental effects are considered. Thus, in addition to our earlier publication on rho / omega modification, this study has experimentally verified vector meson mass modification at normal nuclear density.

Affiliated with

Also associated with

No associations

Rating

Evidence for in-medium modification of the $φ$ meson at normal nuclear density does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Evidence for in-medium modification of the $φ$ meson at normal nuclear density, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for in-medium modification of the $φ$ meson at normal nuclear density will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-294086