The data sample of Λ_b^0→J/ψpK^- decays acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3 fb^-1, is inspected for the presence of J/ψp or J/ψK^- contributions with minimal assumptions about K^-p contributions. It is demonstrated at more than nine standard deviations that Λ_b^0→J/ψpK^- decays cannot be described with K^-p contributions 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 Λ_b^0→J/ψpK^- Decays
VELTRI, MICHELE;
2016
Abstract
The data sample of Λ_b^0→J/ψpK^- decays acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3 fb^-1, is inspected for the presence of J/ψp or J/ψK^- contributions with minimal assumptions about K^-p contributions. It is demonstrated at more than nine standard deviations that Λ_b^0→J/ψpK^- decays cannot be described with K^-p contributions 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.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
