Resumen
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+.
Idioma original | English |
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Número de artículo | 222002 |
Publicación | Physical Review Letters |
Volumen | 112 |
N.º | 22 |
DOI | |
Estado | Published - 4 jun 2014 |
Publicado de forma externa | Sí |
All Science Journal Classification (ASJC) codes
- Física y Astronomía General