Observation of the doubly Cabibbo-suppressed decay Xi(+)(c) -> p phi



Aaij, R, Beteta, C Abellan, Adeva, B, Adinolfi, M, Aidala, CA, Ajaltouni, Z, Akar, S, Albicocco, P, Albrecht, J, Alessio, F
et al (show 842 more authors) (2019) Observation of the doubly Cabibbo-suppressed decay Xi(+)(c) -> p phi. JOURNAL OF HIGH ENERGY PHYSICS, 04 (4). 084-.

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Abstract

The doubly Cabibbo-suppressed decay $\Xi_{c}^{+}\to p\phi$ with $\phi\to K^{+}K^{-}$ is observed for the first time, with a statistical significance of more than fifteen standard deviations. The data sample used in this analysis corresponds to an integrated luminosity of 2 fb$^{-1}$ recorded with the LHCb detector in $pp$ collisions at a centre-of-mass energy of 8 TeV. The ratio of branching fractions between the decay $\Xi_{c}^{+}\to p\phi$ and the singly Cabibbo-suppressed decay $\Xi_{c}^{+}\to pK^{-}\pi^{+}$ is measured to be \begin{equation*} \frac{\mathcal{B}(\Xi_{c}^{+}\to p\phi)}{\mathcal{B}(\Xi_{c}^{+}\to pK^{-}\pi^{+})} = (19.8 \pm 0.7 \pm 0.9 \pm 0.2) \times 10^{-3}, \end{equation*} where the first uncertainty is statistical, the second systematic and the third due to the knowledge of the $\phi\to K^{+}K^{-}$ branching fraction.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2018-040.html
Uncontrolled Keywords: Flavor physics, Branching fraction, Charm physics, Hadron-Hadron scattering (experiments)
Depositing User: Symplectic Admin
Date Deposited: 08 May 2019 10:13
Last Modified: 19 Jan 2023 00:48
DOI: 10.1007/JHEP04(2019)084
Open Access URL: https://doi.org/10.1007/JHEP04(2019)084
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3040247