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.

Aaij, R., Abdelmotteleb, A., Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2023). Search for the doubly heavy baryon Ξbc+ decaying to J/ψΞc+. CHINESE PHYSICS C, 47(9) [10.1088/1674-1137/ace9c8].

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

Borsato M.;Calvi M.;Capelli S.;Carniti P.;Fazzini D.;Pardinas J. G.;Gotti C.;Kirsebom V. S.;Martinazzoli L.;Martinelli M.;Meloni S.;Minotti A.;Petruzzo M.;Pizzichemi M.;Salomoni M.;Shields E. B.;
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.
Articolo in rivista - Articolo scientifico
B physics; charm physics; QCD; spectroscopy;
English
24-lug-2023
2023
47
9
093001
none
Aaij, R., Abdelmotteleb, A., Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2023). Search for the doubly heavy baryon Ξbc+ decaying to J/ψΞc+. CHINESE PHYSICS C, 47(9) [10.1088/1674-1137/ace9c8].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/466521
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