• Browse all
Measurement of the ratio B(Bc+/- to J/psi pi+/- pi+/- pi-/+)/B(Bc+/- to J/psi pi+/-) and the production cross sections times branching fractions of Bc+/- to J/psi pi+/- and B+/- to J/psi K+/- in pp collisions at sqrt(s) = 7 TeV

The CMS collaboration
Khachatryan, Vardan , Sirunyan, Albert M , Tumasyan, Armen , Adam, Wolfgang , Bergauer, Thomas , Dragicevic, Marko , Erö, Janos , Fabjan, Christian , Friedl, Markus , Fruehwirth, Rudolf
JHEP 01 (2015) 063, 2015.
https://doi.org/10.17182/hepdata.39386.v1

Abstract (data abstract)
CERN-LHC. The ratio of the production cross sections times branching fractions $\sigma(B_c^{\pm})B(B_c^{\pm} \to J/\psi \pi^{\pm}) /((\sigma(B^{\pm}) B(B^{\pm} \to J/\psi K^{\pm}))$ is studied in proton-proton collisions at a center-of-mass energy of 7 TeV with the CMS detector at the LHC. The kinematic region investigated requires $B_c^{\pm}$ and $B^{\pm}$ mesons with transverse momentum $p_T$ > 15 GeV and rapidity |y| < 1.6. The data sample corresponds to an integrated luminosity of 5.1 fb$^{-1}$. The ratio is determined to be [0.48 $\pm$ 0.05(stat) $\pm$ 0.03(syst) $\pm$ 0.05 ($\tau_{Bc})$]% . The $B_c^{\pm} \to J/\psi \pi^{\pm} \pi^{\pm} \pi^{\mp}$ is also observed in the same data sample. Using a model-independent method developed to measure the efficiency given the presence of resonant behaviour in the three-pion system, the ratio of the branching fractions $B(B_c^{\pm} \to J/\psi \pi^{\pm} \pi^{\pm} \pi^{\mp})/B(B_c^{\pm} \to J/\psi \pi^{\pm})$ is measured to be 2.55 $\pm$ 0.80(stat) $\pm$ 0.33(syst) $\mathrm{^{+ 0.04}_{-0.01} }(\tau_{Bc}$), consistent with the previous LHCb result.

  • Table 1

    Data from Equation 2, Fig.1, Table 1 of the preprint

    10.17182/hepdata.39386.v1/t1

    The ratio of the production cross sections times branching fractions of $B_c^\pm\to J/\psi\pi^\pm$ and $B^\pm\to J/\psi K^\pm$ is measured in...

  • Table 2

    Data from Equation 5, Figure 2, Figure 3, Table 2 of the preprint

    10.17182/hepdata.39386.v1/t2

    To determine the systematic uncertainty in the ratio of branching fractions associated with the uncertainty in the $B_c^\pm$ lifetime, the...

Loading Data...

Ask a Question


Your question will be emailed to those involved with the submission. Please mention the relevant table.


Please log in to HEPData to send a question.