Search for the doubly heavy baryon Ξbc+ decaying to J/ψΞc+ *

LHCb Collaboration

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Resum

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.

Idioma originalAnglès
Número d’article093001
RevistaChinese Physics C
Volum47
Número9
DOIs
Estat de la publicacióPublicada - de set. 2023

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