First measurement of the ρ spectral function in nuclear collisions
نویسندگان
چکیده
منابع مشابه
First measurement of the ρ spectral function in nuclear collisions
The NA60 experiment at the CERN SPS has studied low-mass muon pairs in 158 AGeV InIn collisions. A strong excess of pairs is observed above the yield expected from neutral meson decays. The unprecedented sample size close to 400K events and the good mass resolution of about 2% made it possible to isolate the excess by subtraction of the decay sources. The shape of the resulting mass spectrum sh...
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15 صفحه اول0 The ρ Spectral Function in a Relativistic Resonance Model
We calculate the spectral function A ρ of the ρ meson in nuclear matter. The calculation is performed in the low density approximation , where the in-medium self energy Σ med is completely determined by the vacuum ρ N forward scattering amplitude. This amplitude is derived from a relativistic resonance model. In comparison to previous non-relativistic calculations we find a much weaker momentum...
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The spectral function of rho meson in hot/dense hadronic matter is calculated. Different from the pure temperature effect which changes the spectral function slightly, in the hadronic environment with high baryonic chemical potential and high temperature the spectral function becomes narrower and is shifted towards the low invariant mass region significantly. PACS: 14.40. Cs, 25.75. -q It is wi...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2006
ISSN: 0375-9474
DOI: 10.1016/j.nuclphysa.2006.06.121