Affordable Access

Publisher Website

Evidence for two excited ϱ-meson states from QCD sum rules

Authors
Journal
Physics Letters B
0370-2693
Publisher
Elsevier
Publication Date
Volume
253
Identifiers
DOI: 10.1016/0370-2693(91)91750-p

Abstract

Abstract We have determined the masses, the total widths and the branching-ratio products of two lowest-lying excited ϱ-meson states by simultaneous numerical matching of the corresponding Laplace QCD sum rule and its derivative in a suitable range of the sum-rule variable M. The analysis is based on the smooth parametrization of the low-energy hadronic cross section. Besides the ϱ″ (1700) meson the sum rules favour also the existence of a second state with mass 1350–1478 MeV.

There are no comments yet on this publication. Be the first to share your thoughts.