Observation of the doubly Cabibbo-suppressed decay Xi(+)(c) -> p phi
The doubly Cabibbo- suppressed decay Xi(+)(c) -> p phi with ! K+K is observed for the fi rst time, with a statistical signi fi cance of more than fi fteen standard deviations. The data sample used in this analysis corresponds to an integrated luminosity of 2 fb recorded with the LHCb detector in pp collisions at a centre- of- mass energy of 8TeV. The ratio of branching fractions between the decay + c ! p and the singly Cabibbo- suppressed decay + c ! pK is measured to be B (Xi(+)(c) -> p phi) B (Xi(+)(c) -> p phi) = (19 : 8 0 : 7 0 : 9 0 : 2) 10 where the fi rst uncertainty is statistical, the second systematic and the third due to the knowledge of the Xi(+)(c) -> pK(+)pi(+) branching fraction.
Final Version.pdf
Publisher's version
openaccess
CC BY
446.66 KB
Adobe PDF
bc29b033a99e254a6578acd120da89a0
10-1007-JHEP04(2019)084.pdf
Publisher's version
openaccess
CC BY
452.92 KB
Adobe PDF
d681c200681e1f81b9a2750f0baf4906