Measurement of the $B_c^{\pm }$ production cross section in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV

Abstract

We describe a measurement of the ratio of the cross sections times branching fractions of the $B_c^{+}$ meson in the decay mode $B_c^{+}\to J/\psi \mu \nu$ to the $B^{+}$ meson in the decay mode $B^{+}\to J/\psi K^{+}$ in proton-antiproton collisions at center-of-mass energy $\sqrt{s}=1.96$ TeV. The measurement is based on the complete CDF Run II data set, which comes from an integrated luminosity of $8.7{\mathrm{fb}}^{-1}$. The ratio of the production cross sections times branching fractions for $B_c^{+}$ and $B_c^{+}$ mesons with momentum transverse to the beam greater than $6\text{GeV}/c$ and rapidity magnitude smaller than 0.6 is $0.211\pm 0.012~\mbox{(stat)}^{+0.021}_{-0.020}~\mbox{(syst)}$. Using the known $B^{+}\to J/\psi K^{+}$ branching fraction, the known $B^{+}$ production cross section, and a selection of the predicted $B_c^{+}\to J/\psi \mu \nu$ branching fractions, the range for the total $B_c^{+}$ production cross section is estimated.

arXiv comment28 pages, 25 figures, and 20 tables. This version is consistent with paper published in Phys. Rev. D on March 1, 2016

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• $B_c\to J/\psi$ Form Factors for the full $q^2$ range from Lattice QCD
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• Spin-$1/2$ invisible particles in heavy meson decays
• First estimates of the $B_c$ wave function from the data on the $B_c$ production cross section
• Studies of $X(3872)$ and $\psi (2S)$ production in $p\bar{p}$ collisions at 1.96 TeV
• $B_c$ to $A$ Transition Form Factors and Semileptonic Decays in Self-consistent Covariant Light-front Approach
• Flavor Dependent Effects on Rare Weak Decays of $B_c^{\ast }$ and $B_s^{\ast }$ Mesons