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 Ξ+bc decaying to J/ψΞ+c

Bassi, G.
Membro del Collaboration Group
;
Kleijne, N.
Membro del Collaboration Group
;
Lusiani, A.
Membro del Collaboration Group
;
Morello, M. J.
Membro del Collaboration Group
;
Pica, L.
Membro del Collaboration Group
;
Ribatti, R.
Membro del Collaboration Group
;
2023

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.
2023
Settore FIS/01 - Fisica Sperimentale
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
B physics; charm physics; QCD; spectroscopy
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/149934
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