We perform a full amplitude analysis of B0→ψ ′K+π- decays, with ψ′→μ+μ- or e +e-, to constrain the spin and parity of the Z(4430) -. The JP=1+ hypothesis is favored over the 0-, 1-, 2- and 2+ hypotheses at the levels of 3.4σ, 3.7σ, 4.7σ and 5.1σ, respectively. The analysis is based on a 711 fb-1 data sample that contains 772×106 BB̄ pairs collected at the Υ(4S) resonance by the Belle detector at the asymmetric-energy e+e- collider KEKB.
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - 22 Oct 2013|