Abstract
Resonant structures in B0 -K+ decays are analyzed by performing a four-dimensional fit of the decay amplitude, using pp collision data corresponding to 3fb-1 collected with the LHCb detector. The data cannot be described with K+Ï€- resonances alone, which is confirmed with a model-independent approach. A highly significant Z(4430)- φπ- component is required, thus confirming the existence of this state. The observed evolution of the Z(4430)- amplitude with the Ïâ€Ï€- mass establishes the resonant nature of this particle. The mass and width measurements are substantially improved. The spin parity is determined unambiguously to be 1+.
Original language | English |
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Article number | 222002 |
Journal | Physical Review Letters |
Volume | 112 |
Issue number | 22 |
DOIs | |
Publication status | Published - 4 Jun 2014 |
Externally published | Yes |
Bibliographical note
Copyright:Copyright 2014 Elsevier B.V., All rights reserved.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)