Measurement of the relative $B_c^{\pm }/B^{\pm }$ production cross section with the ATLAS detector at $\sqrt{s}=8$ TeV

Abstract

The total cross section and differential cross sections for the production of $B_c^{\pm }$ mesons, times their branching fraction to $J/\psi {\pi }^{\pm }$, are measured relative to those for the production of $B^{\pm }$ mesons, times their branching fraction to $J/\psi K^{\pm }$. The data used for this study correspond to an integrated luminosity of $20.3{\mathrm{fb}}^{-1}$ of $pp$ collisions recorded by the ATLAS detector at the Large Hadron Collider in 2012 at a center-of-mass energy of $\sqrt{s}=8$ TeV. The measurement is performed differentially in bins of transverse momentum $p_{\mathrm{T}}$ for $13$ GeV $<p_{\mathrm{T}}(B_c^{\pm })<22$ GeV and $p_{\mathrm{T}}(B_c^{\pm })>22$ GeV and in bins of rapidity $y$ for $|y|<0.75$ and $0.75<|y|<2.3$. The relative cross section times branching fraction for the full range $p_{\mathrm{T}}>13$ GeV and $|y|<2.3$ is $(0.34\pm 0.04_{\text{stat}}{}_{-0.02}^{+0.06}{}_{\text{sys}}\pm 0.01_{\text{lifetime}})\%$. The differential measurements suggest that the production cross section of the $B_c^{\pm }$ decreases faster with $p_{\mathrm{T}}$ than the production cross section of the $B^{\pm }$, while no significant dependence on rapidity is observed.

arXiv comment39 pages in total, author list starting page 23, 7 figures, submitted to PRD. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/BPHY-2016-03

References in corpus (26)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• A Brief Introduction to PYTHIA 8.1
• The ATLAS Simulation Infrastructure
• sPlot: a statistical tool to unfold data distributions
• Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC
• Performance of the ATLAS Trigger System in 2010
• Measurement of the muon reconstruction performance of the ATLAS detector using 2011 and 2012 LHC proton-proton collision data
• Heavy meson masses and decay constants from relativistic heavy quarks in full lattice QCD
• B-meson decay constants: a more complete picture from full lattice QCD
• Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton-proton collisions at the LHC
• Prospects for the Bc Studies at LHCb
• Measurement of Upsilon production in 7 TeV pp collisions at ATLAS
• On Hadronic Production of the $B_c$ Meson
• Measurements of $B_c^{+}$ production and mass with the $B_c^{+}\to J/\psi {\pi }^{+}$ decay
• Measurement of the differential cross-sections of prompt and non-prompt production of $J/\psi$ and $\psi (2\mathrm{S})$ in $pp$ collisions at $\sqrt{s}=7$ and $8$ TeV with the ATLAS detector
• Observation and measurements of the production of prompt and non-prompt $J/\psi$ mesons in association with a $Z$ boson in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Measurement of $B_c^{+}$ production in proton-proton collisions at $\sqrt{s}=8$ TeV
• Muon reconstruction efficiency and momentum resolution of the ATLAS experiment in proton-proton collisions at $\sqrt{s}$=7 TeV in 2010
• Comparative Study of the Hadronic Production of $B_c$ Mesons
• Measurement of the differential cross-section of B+ meson production in pp collisions at sqrt(s) = 7 TeV at ATLAS
• Measurement of the production cross-section of $\psi (2S)\to J/\psi (\to {\mu }^{+}{\mu }^{-}){\pi }^{+}{\pi }^{-}$ in $pp$ collisions at $\sqrt{s}=7$ TeV at ATLAS
• Measurement of the ratio of the production cross sections times branching fractions of Bc+/- to J/psi pi+/- and B+/- to J/psi K+/- and B(Bc+/- to J/psi pi+/- pi+/- pi-/+)/B(Bc+/- to J/psi pi+/-) in pp collisions at sqrt(s) = 7 TeV
• Perturbative predictions for B_c meson production in hadronic collisions
• Some Features of the Hadronic $B_c^{(\ast )}$-meson Production at Large $p_T$
• $B_c$--meson production in hadron--hadron collisons

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