TY - JOUR
T1 - c̄c purity of ψ(3770) and ψ′ challenged
AU - Voloshin, M. B.
N1 - Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2005/6/1
Y1 - 2005/6/1
N2 - It is suggested that the resonance ψ(3770) may contain a sizeable (O(10%) in terms of the probability weight factor) four-quark component with the up- and down-quarks and antiquarks in addition to the cc̄ pair, which component in itself has a substantial part with isospin I=1. Furthermore such a four-quark part of the wave function should also affect the properties of the ψ′ charmonium resonance through the ψ(3770)-ψ′ mixing previously considered in the literature. It is argued that an admixture of extra light quark pairs can explain a possible discrepancy between the theoretical expectations and the recent data on the non-DD̄ decay width of the ψ(3770) and the ratio of the yield of charged and neutral D meson pairs in its decays, as well as on the extra rate of the ψ′ direct decay into light hadrons and the rate of the decay ψ′→π0J/ψ. It is further argued that the suggested four-quark component of the wave function of the ψ(3770) should give rise to a measurable rate for the decays ψ(3770)→ηJ/ψ and ψ(3770)→π0J/ψ.
AB - It is suggested that the resonance ψ(3770) may contain a sizeable (O(10%) in terms of the probability weight factor) four-quark component with the up- and down-quarks and antiquarks in addition to the cc̄ pair, which component in itself has a substantial part with isospin I=1. Furthermore such a four-quark part of the wave function should also affect the properties of the ψ′ charmonium resonance through the ψ(3770)-ψ′ mixing previously considered in the literature. It is argued that an admixture of extra light quark pairs can explain a possible discrepancy between the theoretical expectations and the recent data on the non-DD̄ decay width of the ψ(3770) and the ratio of the yield of charged and neutral D meson pairs in its decays, as well as on the extra rate of the ψ′ direct decay into light hadrons and the rate of the decay ψ′→π0J/ψ. It is further argued that the suggested four-quark component of the wave function of the ψ(3770) should give rise to a measurable rate for the decays ψ(3770)→ηJ/ψ and ψ(3770)→π0J/ψ.
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U2 - 10.1103/PhysRevD.71.114003
DO - 10.1103/PhysRevD.71.114003
M3 - Article
AN - SCOPUS:33644538957
SN - 1550-7998
VL - 71
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 11
M1 - 114003
ER -