The data sample of Λ0b→J/ψpK− decays acquired with the LHCb detector from 7 and 8 TeV ppcollisions, corresponding to an integrated luminosity of 3  fb−1, is inspected for the presence of J/ψpor J/ψK− contributions with minimal assumptions about K−p contributions. It is demonstrated at more than nine standard deviations that Λ0b→J/ψpK− decays cannot be described with K−pcontributions alone, and that J/ψp contributions play a dominant role in this incompatibility. These model-independent results support the previously obtained model-dependent evidence for P+c→J/ψp charmonium-pentaquark states in the same data sample.

Model-Independent Evidence for J /ψp Contributions to Λb0 →j /ψpK- Decays / Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 1092-0145. - 117:8(2016). [10.1103/PhysRevLett.117.082002]

Model-Independent Evidence for J /ψp Contributions to Λb0 →j /ψpK- Decays

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2016

Abstract

The data sample of Λ0b→J/ψpK− decays acquired with the LHCb detector from 7 and 8 TeV ppcollisions, corresponding to an integrated luminosity of 3  fb−1, is inspected for the presence of J/ψpor J/ψK− contributions with minimal assumptions about K−p contributions. It is demonstrated at more than nine standard deviations that Λ0b→J/ψpK− decays cannot be described with K−pcontributions alone, and that J/ψp contributions play a dominant role in this incompatibility. These model-independent results support the previously obtained model-dependent evidence for P+c→J/ψp charmonium-pentaquark states in the same data sample.
2016
Quark model, Exotic baryons, Experiments
01 Pubblicazione su rivista::01a Articolo in rivista
Model-Independent Evidence for J /ψp Contributions to Λb0 →j /ψpK- Decays / Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 1092-0145. - 117:8(2016). [10.1103/PhysRevLett.117.082002]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074141
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