@Article{LHCbCollaborationAaij_etal2021,
author="LHCb Collaboration (Aaij, R. et al
and Jashal, B. K.
and Martinez-Vidal, F.
and Oyanguren, A.
and Remon Alepuz, C.
and Ruiz Vidal, J.",
title="Search for the doubly charmed baryon Xi(+)(cc) in the Xi(+)(c)pi(-)pi(+) final state",
journal="Journal of High Energy Physics",
year="2021",
publisher="Springer",
volume="12",
number="12",
pages="107--27pp",
optkeywords="Charm physics; Hadron-Hadron scattering (experiments); Branching fraction; QCD; Flavor physics",
abstract="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.",
optnote="WOS:000732955700001",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5057), last updated on Sat, 01 Jan 2022 17:09:57 +0000",
issn="1029-8479",
doi="10.1007/JHEP12(2021)107",
opturl="https://arxiv.org/abs/2109.07292",
opturl="https://doi.org/10.1007/JHEP12(2021)107",
language="English"
}