Study of tensor states in the reaction γγ→π+π−π0γγ\to π^+π^-π^0

preprint2006arXivOpen access

Abstract

A high statistics study of the reaction γγ→π+π−π0γγ\to π^+π^-π^0 has been performed with the Belle detector using a data sample of 26 fb−1^{-1} collected at $\sqrt{s}=10.58\GeVcsq$. A spin-parity analysis shows dominance of the JP=2+J^P=2^+ helicity 2 wave for three-pion invariant masses from 1 to 3 \GeVcsq. The invariant mass distribution exhibits a2(1320)a_2(1320), a2(1700)a_2(1700) and higher mass enhancements.

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