PROBING SCALAR MESON STRUCTURES IN χ_c1 DECAYS INTO PSEUDOSCALAR AND SCALAR

Abstract

We evaluate the decay branching ratios of χc1 → P S, in a quark model parametrization scheme, where P and S stand for pseudoscalar and scalar meson, respectively. An interesting feature of this decay process is that the cc annihilate via the pQCD hair-pin diagram is supposed to be dominant. Hence, this decay process should be sensitive to the quark components of the final-state light mesons, and would provide a great opportunity for testing the mixing relations among the scalar mesons, i.e. f0(1370), f0(1500) and f0 (1710), by tagging the final state pseudoscalar mesons.

Measurement ofχcJdecaying intoη′K+K−

“…As mentioned in the introduction, the results can be used to constrain glueballqq mixing schemes for scalar mesons. However, both the theory in reference [4] and our measurement result has large uncertainty. Our result can not distinguish between the mixing schemes.…”