%0 Journal Article
%T Search for the doubly charmed baryon Xi(+)(cc) in the Xi(+)(c)pi(-)pi(+) final state
%A LHCb Collaboration (Aaij, R. et al
%A Jashal, B. K.
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Remon Alepuz, C.
%A Ruiz Vidal, J.
%J Journal of High Energy Physics
%D 2021
%V 12
%N 12
%I Springer
%@ 1029-8479
%G English
%F LHCbCollaborationAaij_etal2021
%O WOS:000732955700001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5057), last updated on Sat, 01 Jan 2022 17:09:57 +0000
%X A search for the doubly charmed baryon Xi(+)(cc) is performed in the Xi(+)(c)pi(-)pi(+ )invariant-mass spectrum, where the Xi(-)(cc) baryon is reconstructed in the pK(-)pi(+) final state. The study uses proton-proton collision data collected with the LHCb detector at a centreof-mass energy of 13 TeV, corresponding to a total integrated luminosity of 5.4 fb(-1). No significant signal is observed in the invariant-mass range of 3.4-3.8 GeV/c(2). Upper limits are set on the ratio of branching fractions multiplied by the production cross-section with respect to the Xi(++)(cc) -> (Xi(+)(c) -> pK(-)pi(+)+/-)pi(+ ) decay for different Xi(+)(cc) mass and lifetime hy- potheses in the rapidity range from 2.0 to 4.5 and the transverse momentum range from 2.5 to 25 GeV/c. The results from this search are combined with a previously published search for the Xi(+)(cc) -> A(c)(+)K(-)pi(+ ) decay mode, yielding a maximum local significance of 4.0 standard deviations around the mass of 3620 MeV/c(2), including systematic uncertainties. Taking into account the look-elsewhere effect in the 3.5-3.7 GeV/c(2) mass window, the combined global significance is 2.9 standard deviations including systematic uncertainties.
%K Charm physics
%K Hadron-Hadron scattering (experiments)
%K Branching fraction
%K QCD
%K Flavor physics
%R 10.1007/JHEP12(2021)107
%U https://arxiv.org/abs/2109.07292
%U https://doi.org/10.1007/JHEP12(2021)107
%P 107-27pp