Measurement of the ratio of branching fractions of the decays ${\Lambda }_b^0\to \psi (2S)\Lambda$ and ${\Lambda }_b^0\to J/\psi \Lambda$

Abstract

Using $pp$ collisions corresponding to 3${\text{fb}}^{-1}$ integrated luminosity, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8$\text{TeV}$, the ratio of branching fractions \begin{align*} \mathcal{B}(Λ^0_b\!\toψ(2S) Λ)/\mathcal{B}(Λ^0_b\!\to J/ψΛ)= 0.513 \pm 0.023\, (\text{stat}) \pm 0.016 \, (\text{syst}) \pm 0.011\, (\mathcal{B}) \end{align*} is determined. The first uncertainty is statistical, the second is systematic and the third is due to the external branching fractions used.

arXiv commentAll figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2017-041.html (LHCb public pages)

References in corpus (11)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• A Brief Introduction to PYTHIA 8.1
• LHCb Detector Performance
• Kernel Estimation in High-Energy Physics
• Performance of the LHCb Outer Tracker
• Mass distributions marginalized over per-event errors
• Evaluating decay Rates and Asymmetries of ${\Lambda }_b$ into Light Baryons in LFQM
• Rare dileptonic decays of Λ_b in a quark model
• Polarization effects in the cascade decay Lambda_b -> Lambda(-> p pi-) + J/psi(-> l+ l-) in the covariant confined quark model
• Towards an assessment of the ATLAS data on the branching ratio Gamma(Lambda_b(0) -> psi(2S) Lambda(0))/Gamma(Lambda_b(0) -> J/psi Lambda(0))

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