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Publication - Professor Jonas Rademacker

    Measurements of the branching fractions of Λc+ → pπ−π+, Λc+ → pK−K+, and Λc+ → pπ−K+

    Citation

    Adinolfi, M, Buchanan, E, Chapman, M, Cook, A, Dalseno, J, Harnew, S, Kariuki, J, Maddrell-Mander, S, Naik, P, Petridis, K, Pomery, G, Price, EP, Prouve, C, Quagliani, R, Rademacker, J, Richards, S, Saunders, D, Skidmore, N, Velthuis, J & , 2018, ‘Measurements of the branching fractions of Λc+ → pπ−π+, Λc+ → pK−K+, and Λc+ → pπ−K+’. Journal of High Energy Physics, vol 43.

    Abstract

    The ratios of the branching fractions of the decays Λ c +  → π+, Λ c +  → pKK+, and Λ c +  → K+ with respect to the Cabibbo-favoured Λ c +  → pKπ+
    decay are measured using proton-proton collision data collected with
    the LHCb experiment at a 7 TeV centre-of-mass energy and corresponding
    to an integrated luminosity of 1.0 fb−1:
    B(Λ+c→pπ−π+)B(Λ+c→pK−π+)=(7.44±0.08±0.18)%,B(Λ+c→pK−K+)B(Λ+c→pK−π+)=(1.70±0.03±0.03)%B(Λ+c→pπ−K+)B(Λ+c→pK−π+)=(0.165±0.015±0.005)%,
    where the uncertainties are statistical and systematic, respectively.
    These results are the most precise measurements of these quantities to
    date. When multiplied by the world-average value for B(Λ+c→pK−π+), the corresponding branching fractions are
    B(Λ+c→pπ−π+)=(4.72±0.05±0.11±0.25)×10−3,B(Λ+c→pK−K+)=(1.08±0.02±0.02±0.06)×10−3,B(Λ+c→pπ−K+)=(1.04±0.09±0.03±0.05)×10−4,
    where the final uncertainty is due to B(Λ+c→pK−π+).

    Full details in the University publications repository