PublicaciΓ³n: Observation of a Narrow Pentaquark State, ππβ’(4312)+, and of the Two-Peak Structure of the ππβ’(4450)+
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Fecha
2019-06-05
Autores
Aaij, R.
AbellΓ‘n Beteta, C.
Adeva, B.
Adinolfi, M.
et al. (LHCb Collaboration)
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info:eu-repo/semantics/openAccess
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Editor
American Physical Society
Resumen
A narrow pentaquark state, ππβ’(4312)+, decaying to π½/πβ’π, is discovered with a statistical significance of 7.3β’π in a data sample of Ξ0πβπ½/πβ’πβ’πΎβ decays, which is an order of magnitude larger than that previously analyzed by the LHCb Collaboration. The ππβ’(4450)+ pentaquark structure formerly reported by LHCb is confirmed and observed to consist of two narrow overlapping peaks, ππβ’(4440)+ and ππβ’(4457)+, where the statistical significance of this two-peak interpretation is 5.4β’π. The proximity of the Ξ£+πβ’Β―π·0 and Ξ£+πβ’Β―π·*0 thresholds to the observed narrow peaks suggests that they play an important role in the dynamics of these states
DescripciΓ³n
The registered version of this article, first published in βPhysical Review Letters, 122(4)222001", is available online at the publisher's website: American Physical Society, https://doi.org/10.1103/PhysRevLett.122.222001
La versiΓ³n registrada de este artΓculo, publicado por primera vez en βPhysical Review Letters, 122(4)222001", estΓ‘ disponible en lΓnea en el sitio web del editor: American Physical Society, https://doi.org/10.1103/PhysRevLett.122.222001
La versiΓ³n registrada de este artΓculo, publicado por primera vez en βPhysical Review Letters, 122(4)222001", estΓ‘ disponible en lΓnea en el sitio web del editor: American Physical Society, https://doi.org/10.1103/PhysRevLett.122.222001
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CitaciΓ³n
Aaij, R., AbellΓ‘n Beteta, C., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, FernΓ‘ndez RamΓrez, CΓ©sar, et al. (2019). Observation of a Narrow Pentaquark State, Pc (4312)+, and of the Two-Peak Structure of the Pc (4450)+. Physical Review Letters, 122(22), 222001. https://doi.org/10.1103/PhysRevLett.122.222001
Centro
Facultades y escuelas::Facultad de Ciencias
Departamento
FΓsica Interdisciplinar