Model-independent confirmation of the Z(4430)(-) state

The decay B-0 -> psi(2S)K+pi(-) is analyzed using 3 fb(-1) of pp collision data collected with the LHCb detector. A model-independent description of the psi(2S)pi mass spectrum is obtained, using as input the K pi mass spectrum and angular distribution derived directly from data, without requiring a theoretical description of resonance shapes or their interference. The hypothesis that the psi(2S)pi mass spectrum can be described in terms of K pi reflections alone is rejected with more than 8 sigma significance. This provides confirmation, in a model-independent way, of the need for an additional resonant component in the mass region of the Z(4430)(-) exotic state.


Published in:
Physical Review D, 92, 11, 112009
Year:
2015
Publisher:
College Pk, Amer Physical Soc
ISSN:
1550-7998
Laboratories:




 Record created 2016-02-16, last modified 2018-01-28


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