Observation of the doubly Cabibbo-suppressed decay $\Xi_{c}^{+}\to p\phi$ - INSPIRE

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Observation of the doubly Cabibbo-suppressed decay $\Xi_{c}^{+}\to p\phi$

LHCb

Collaboration

Jan 18, 2019

17 pages

Published in:

JHEP 04 (2019) 084

Published: Apr 10, 2019

e-Print:

1901.06222 [hep-ex]

DOI:

10.1007/JHEP04(2019)084

PDG:

{{\mathit \Xi}_{{{c}}}^{+}}

\rightarrow

{{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}

Report number:

LHCb-PAPER-2018-040,
CERN-EP-2018-349

Experiments:

CERN-LHC-LHCb

View in:

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Abstract: (Springer)

The doubly Cabibbo-suppressed decay Ξ

_{c}^{+}

→ pϕ with ϕ → 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 Ξ

_{c}^{+}

→ pϕ and the singly Cabibbo-suppressed decay Ξ

_{c}^{+}

→ pK

^{−}

π

^{+}

is measured to be

\frac{\mathrm{\mathcal{B}}\left({\varXi}_c^{+}\to p\phi \right)}{\mathrm{\mathcal{B}}\left({\varXi}_c^{+}\to p{K}^{-}{\pi}^{+}\right)}=\left(19.8\pm 0.7\pm 0.9\pm 0.2\right)\times {10}^{-3},

Note:

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

Flavor physics
Branching fraction
Charm physics
Hadron-Hadron scattering (experiments)
p p: colliding beams
branching ratio: ratio: measured
Xi/c+: branching ratio
p p: scattering
Xi/c+: hadroproduction
Xi/c+: hadronic decay

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