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Physics  2013 

Experimental constraints on the spin and parity of the Z(4430)+

DOI: 10.1103/PhysRevD.88.074026

Belle Collaboration,K. Chilikin,R. Mizuk,I. Adachi,H. Aihara,K. Arinstein,D. M. Asner,V. Aulchenko,T. Aushev,T. Aziz,A. M. Bakich,A. Bala,V. Bhardwaj,B. Bhuyan,A. Bondar,G. Bonvicini,A. Bozek,M. Bra?ko,J. Brodzicka,T. E. Browder,V. Chekelian,A. Chen,P. Chen,B. G. Cheon,R. Chistov,I. -S. Cho,K. Cho,V. Chobanova,S. -K. Choi,Y. Choi,D. Cinabro,J. Dalseno,M. Danilov,Z. Dole?al,D. Dutta,S. Eidelman,D. Epifanov,H. Farhat,J. E. Fast,T. Ferber,A. Frey,V. Gaur,N. Gabyshev,S. Ganguly,R. Gillard,Y. M. Goh,B. Golob,J. Haba,T. Hara,K. Hayasaka,H. Hayashii,Y. Horii,Y. Hoshi,W. -S. Hou,H. J. Hyun,T. Iijima,A. Ishikawa,R. Itoh,Y. Iwasaki,T. Julius,D. H. Kah,J. H. Kang,E. Kato,T. Kawasaki,H. Kichimi,C. Kiesling,D. Y. Kim,H. J. Kim,J. B. Kim,J. H. Kim,K. T. Kim,Y. J. Kim,K. Kinoshita,J. Klucar,B. R. Ko,P. Kody?,S. Korpar,P. Kri?an,P. Krokovny,T. Kumita,A. Kuzmin,Y. -J. Kwon,J. S. Lange,S. -H. Lee,J. Li,Y. Li,J. Libby,C. Liu,Y. Liu,D. Liventsev,P. Lukin,J. MacNaughton,D. Matvienko,K. Miyabayashi,H. Miyata,G. B. Mohanty,A. Moll,T. Mori,N. Muramatsu,R. Mussa,E. Nakano,M. Nakao,Z. Natkaniec,M. Nayak,E. Nedelkovska,C. Ng,N. K. Nisar,S. Nishida,O. Nitoh,S. Ogawa,S. Okuno,S. L. Olsen,C. Oswald,P. Pakhlov,G. Pakhlova,C. W. Park,H. Park,H. K. Park,T. K. Pedlar,R. Pestotnik,M. Petri?,L. E. Piilonen,M. Ritter,M. R?hrken,A. Rostomyan,H. Sahoo,T. Saito,K. Sakai,Y. Sakai,S. Sandilya,D. Santel,L. Santelj,T. Sanuki,V. Savinov,O. Schneider,G. Schnell,C. Schwanda,D. Semmler,K. Senyo,O. Seon,M. E. Sevior

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Abstract:

We perform a full amplitude analysis of B0 -> psi' K+ pi- decays, with psi' -> mu+ mu- or e+ e-, to constrain the spin and parity of the Z(4430)-. The J^P=1+ hypothesis is favored over the 0-, 1-, 2- and 2+ hypotheses at the levels of 3.4 sigma, 3.7 sigma, 4.7 sigma and 5.1 sigma, respectively. The analysis is based on a 711 fb^-1 data sample that contains 772x10^6 B B pairs, collected at the Y(4S) resonance by the Belle detector at the asymmetric-energy e+ e- collider KEKB.

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