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Observation of the resonant character of the Z(4430)− stateстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: LHCb Collaboration (R A.(., Образцов В.Ф.
- Журнал: Physical Review Letters
- Том: 112
- Номер: 222002
- Год издания: 2014
- Издательство: American Physical Society
- Местоположение издательства: United States
- DOI: 10.1103/PhysRevLett.112.222002
- Аннотация: Resonant structures in B0→ψ′π−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+π− resonances alone, which is confirmed with a model-independent approach. A highly significant Z(4430)−→ψ′π− component is required, thus confirming the existence of this state. The observed evolution of the Z(4430)− amplitude with the ψ′π− 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+.
- Добавил в систему: Образцов Владимир Федорович