Dalitz analysis of B{yields}K{pi}{sup +}{psi}{sup '} decays and the Z(4430){sup +}
- Institute for Theoretical and Experimental Physics, Moscow (Russian Federation)
- High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
From a Dalitz plot analysis of B{yields}K{pi}{sup +}{psi}{sup '} decays, we find a signal for Z(4430){sup +}{yields}{pi}{sup +}{psi}{sup '} with a mass M=(4443{sub -12-13}{sup +15+19}) MeV/c{sup 2}, width {gamma}=(107{sub -43-56}{sup +86+74}) MeV, product branching fraction B(B{sup 0}{yields}K{sup -}Z(4430){sup +})xB(Z(4430){sup +}{yields}{pi}{sup +}{psi}{sup '})=(3.2{sub -0.9-1.6}{sup +1.8+5.3})x10{sup -5}, and significance of 6.4{sigma} that agrees with previous Belle measurements based on the same data sample. In addition, we determine the branching fraction B(B{sup 0}{yields}K*(892){sup 0}{psi}{sup '})=(5.52{sub -0.32-0.58}{sup +0.35+0.53})x10{sup -4} and the fraction of K*(892){sup 0} mesons that are longitudinally polarized f{sub L}=(44.8{sub -2.7-5.3}{sup +4.0+4.0})%. These results are obtained from a 605 fb{sup -1} data sample that contains 657x10{sup 6} BB pairs collected near the {upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider.
- OSTI ID:
- 21322311
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 80, Issue 3; Other Information: DOI: 10.1103/PhysRevD.80.031104; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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