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 3 fb^−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+.

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., et al. (2014). Observation of the Resonant Character of the Z(4430)− State. PHYSICAL REVIEW LETTERS, 112(22), 1-9 [10.1103/PhysRevLett.112.222002].

Observation of the Resonant Character of the Z(4430)− State

CARBONE, ANGELO;A. Di Canto;GALLI, DOMENICO;MOGGI, NICCOLO';MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2014

Abstract

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 3 fb^−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+.
2014
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., et al. (2014). Observation of the Resonant Character of the Z(4430)− State. PHYSICAL REVIEW LETTERS, 112(22), 1-9 [10.1103/PhysRevLett.112.222002].
Aaij, R.; Adeva, B.; Adinolfi, M.; Affolder, A.; Ajaltouni, Z.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Cartelle, P.;...espandi
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/296314
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 367
  • ???jsp.display-item.citation.isi??? 306
  • OpenAlex ND
social impact