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Some evidence for a missing chiral partner eta_4 around 2 GeV | | L. Ya. Glozman
; A. Sarantsev
; | | Date: |
27 Apr 2010 | | Abstract: | The high-lying mesons in the light quark sector previously obtained from the
partial wave analysis of the proton-antiproton annihilation in flight at 1.9 -
2.4 GeV region at CERN reveal a very high degree of degeneracy. This degeneracy
can be explained as due to an effective restoration of both SU(2)_L * SU(2)_R
and U(1)_A symmetries combined with a principal quantum number n + J. In this
case there must be chiral partners for the highest spin states in the 2 and 2.3
GeV bands presently missing in the data. Here we reanalyze the Crystal Barrel
data and show an indication for existence of the missing $4^{-+}$ state around
2 GeV. This result calls for further experimental search of the missing states
both in the proton-antiproton annihilation and in the production reactions. | | Source: | arXiv, 1004.4736 | | Services: | Forum | Review | PDF | Favorites | |
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