Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10722429 | Physics Letters B | 2012 | 7 Pages |
Abstract
Based on QCD sum rules we explore the consequences of a scenario for the Ï meson, where the chiral symmetry breaking condensates are set to zero whereas the chirally symmetric condensates remain at their vacuum values. This clean-cut scenario causes a lowering of the Ï spectral moment by about 120 MeV. The complementarity of mass shift and broadening is discussed. A simple parametrization of the Ï spectral function leads to a width of about 280 MeV if no shift of the peak position is assumed.
Related Topics
Physical Sciences and Engineering
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Authors
T. Hilger, R. Thomas, B. Kämpfer, S. Leupold,