The rho meson in a scenario of pure chiral restoration

Details The rho meson in a scenario of pure chiral restoration The rho meson in a scenario of pure chiral restoration

2010-05-26

arxiv.org/abs/1005.4876v1

Phys.Lett.B 709 (2012) 200-206

Physics

Nuclear Physics

Nuclear Theory

15 pages, 3 figures

Scientific paper

10.1016/j.physletb.2012.02.007

Based on QCD sum rules we explore the consequences of a pure chiral restoration scenario for the rho meson, where all chiral symmetry breaking condensates are dropped whereas the chirally symmetric condensates remain at their vacuum values. This pure chiral restoration scenario causes the drop of the rho spectral moment by about 120 MeV. The complementarity of mass shift and broadening is discussed. A simple parametrization of the rho spectral function leads to a width of about 600 MeV if no shift of the peak position is assumed.

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