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Measurement of the Bottom contribution to non-photonic electron production in $p+p$ collisions at $\sqrt{s} $=200 GeV

The STAR collaboration
Phys.Rev.Lett. 105 (2010) 202301, 2010.

Abstract (data abstract)
The contribution of $B$ meson decays to nonphotonic electrons, which are mainly produced by the semileptonic decays of heavy-flavor mesons, in $p+p$ collisions at $\sqrt{s}=200$ GeV has been measured using azimuthal correlations between nonphotonic electrons and hadrons. The extracted $B$ decay contribution is approximately $50\%$ at a transverse momentum of $p_{T} \geq 5$ GeV/$c$. These measurements constrain the nuclear modification factor for electrons from $B$ and $D$ meson decays. The result indicates that $B$ meson production in heavy ion collisions is also suppressed at high $p_{T}$.

  • Table 1

    Data from Fig. 1


    Distributions of the azimuthal angle between nonphotonic electrons and charged hadrons normalized per nonphotonic electron trigger. The trigger electron has...

  • Table 2

    Data from Fig. 2, (b) right panel


    (a) Background-subtracted invariant mass distribution of $K$ pairs requiring at least one nonphotonic electron trigger in the event. The solid...

  • Table 3

    Data from Fig. 3


    Transverse momentum dependence of the relative contribution from $B$ mesons ($r_{B}$) to the nonphotonic electron yields. Error bars are statistical...

Version 2 modifications: Corrected the representation of systematic uncertainties

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