First observation and branching fraction measurement of the ${\Lambda }_b^0\to D_s^{-}p$ decay

Abstract

The first observation of the ${\Lambda }_b^0\to D_s^{-}p$ decay is presented using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of $\sqrt{s}=13\text{TeV}$, corresponding to a total integrated luminosity of $6{\text{fb}}^{-1}$. Using the ${\Lambda }_b^0\to {\Lambda }_c^{+}{\pi }^{-}$ decay as the normalisation mode, the branching fraction of the ${\Lambda }_b^0\to D_s^{-}p$ decay is measured to be $\mathcal{B}({\Lambda }_b^0\to D_s^{-}p)=(12.6\pm 0.5\pm 0.3\pm 1.2)\times 10^{-6}$, where the first uncertainty is statistical, the second systematic and the third due to uncertainties in the branching fractions of the ${\Lambda }_b^0\to {\Lambda }_c^{+}{\pi }^{-}$, $D_s^{-}\to K^{-}{K}^{+}{\pi }^{-}$ and ${\Lambda }_c^{+}\to p{K}^{-}{\pi }^{+}$ decays.

arXiv commentAll figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-038.html (LHCb public pages)

References in corpus (15)

• A Brief Introduction to PYTHIA 8.1
• QCD factorization for exclusive, non-leptonic B meson decays: General arguments and the case of heavy-light final states
• LHCb Detector Performance
• New Results on B->pi, K, eta Decay Formfactors from Light-Cone Sum Rules
• Boosted Decision Trees as an Alternative to Artificial Neural Networks for Particle Identification
• Kernel Estimation in High-Energy Physics
• Decay Chain Fitting with a Kalman Filter
• Efficient, reliable and fast high-level triggering using a bonsai boosted decision tree
• $B$- and $D$-meson leptonic decay constants from four-flavor lattice QCD
• Current status of the Standard Model CKM fit and constraints on $\Delta F=2$ New Physics
• The Unitarity Triangle Fit in the Standard Model and Hadronic Parameters from Lattice QCD: A Reappraisal after the Measurements of Delta m_s and BR(B to tau nu)
• Mass distributions marginalized over per-event errors
• Selection and processing of calibration samples to measure the particle identification performance of the LHCb experiment in Run 2
• LHCb Topological Trigger Reoptimization
• |V_ub| from UTangles and B->pi l nu

Cited by in corpus (1)

• First determination of the spin-parity of ${\Xi }_c(3055{)}^{+,0}$ baryons