A first search for the Ξbc⁺ → J/ψΞc⁺ decay is performed by the LHCb experiment with a data sample of proton-proton collisions, corresponding to an integrated luminosity of 9 fb⁻¹ recorded at centre-of-mass energies of 7, 8, and 13 TeV. Two peaking structures are seen with a local (global) significance of 4.3(2.8) and 4.1(2.4) standard deviations at masses of 6571 and 6694 MeV/c2, respectively. Upper limits are set on the Ξbc⁺ baryon production cross-section times the branching fraction relative to that of the B⁺c → J/ψD⁺s decay at centre-of-mass energies of 8 and 13 TeV, in the Ξbc⁺ and in the B⁺c rapidity and transverse-momentum ranges from 2.0 to 4.5 and 0 to 20 GeV/c, respectively. Upper limits are presented as a function of the Ξbc⁺ mass and lifetime.
Search for the doubly heavy baryon Ξbc⁺ decaying to J/ψΞc⁺*
Graverini E.;Punzi G.;
2023-01-01
Abstract
A first search for the Ξbc⁺ → J/ψΞc⁺ decay is performed by the LHCb experiment with a data sample of proton-proton collisions, corresponding to an integrated luminosity of 9 fb⁻¹ recorded at centre-of-mass energies of 7, 8, and 13 TeV. Two peaking structures are seen with a local (global) significance of 4.3(2.8) and 4.1(2.4) standard deviations at masses of 6571 and 6694 MeV/c2, respectively. Upper limits are set on the Ξbc⁺ baryon production cross-section times the branching fraction relative to that of the B⁺c → J/ψD⁺s decay at centre-of-mass energies of 8 and 13 TeV, in the Ξbc⁺ and in the B⁺c rapidity and transverse-momentum ranges from 2.0 to 4.5 and 0 to 20 GeV/c, respectively. Upper limits are presented as a function of the Ξbc⁺ mass and lifetime.File | Dimensione | Formato | |
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