Updated search for $B_c^{+}$ decays to two charm mesons

Abstract

A data set corresponding to an integrated luminosity of $9{\text{fb}}^{-1}$ of proton-proton collisions collected by the LHCb experiment has been analysed to search for $B_c^{+}\to D_{(s)}^{(\ast )+}\stackrel{(-)}{D}{}^{(\ast )0}$ decays. The decays are fully or partially reconstructed, where one or two missing neutral pions or photons from the decay of an excited charm meson are allowed. Upper limits for the branching fractions, normalised to $B^{+}$ decays to final states with similar topologies, are obtained for fourteen $B_c^{+}$ decay modes. For the decay $B_c^{+}\to D_s^{+}{\overline{D}}^0$, an excess with a significance of 3.4 standard deviations is found.

arXiv commentAll figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2021-023.html (LHCb public pages)

References in corpus (23)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• A Brief Introduction to PYTHIA 8.1
• LHCb Detector Performance
• Performance of the LHCb RICH detector at the LHC
• 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
• Performance of the LHCb Outer Tracker
• Exclusive semileptonic and nonleptonic decays of the Bc meson
• Improved performance of the LHCb Outer Tracker in LHC Run 2
• BCVEGPY: An Event Generator for Hadronic Production of the B_c Meson
• Semileptonic and non-leptonic B_c decays
• Handling uncertainties in background shapes: the discrete profiling method
• LHCb Topological Trigger Reoptimization
• Reweighting with Boosted Decision Trees
• Bayesian fit analysis to full distribution data of $\bar{B}\to D^{(\ast )}\ell \bar{\nu }$: $|V_{cb}|$ determination and New Physics constraints
• A puzzle in ${\bar{B}}_{(s)}^0\to D_{(s)}^{(\ast )+}\{{\pi }^{-},K^{-}\}$ decays and extraction of the $f_s/f_d$ fragmentation fraction
• The nonleptonic decays Bc->Ds antiD0 and Bc->Ds D0 in a relativistic quark model
• Gold-plated Mode of CP-Violation in Decays of B_c Meson from QCD Sum Rules
• The double charm decays of $B_c$ Meson in the Perturbative QCD Approach
• Determination of the angle $\gamma$ from nonleptonic $B_c\to D_s{D}^0$ decays

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