Measurement of electrons from semileptonic heavy-flavor hadron decays in pp collisions at $\sqrt{s} = 2.76$ TeV

The $p_{\rm T}$-differential production cross section of electrons from semileptonic decays of heavy-flavor hadrons has been measured at mid-rapidity in proton-proton collisions at $\sqrt{s} = 2.76$ TeV in the transverse momentum range 0.5 < $p_{\rm T}$ < 12 GeV/$c$ with the ALICE detector at the LHC. The analysis was performed using minimum bias events and events triggered by the electromagnetic calorimeter. Predictions from perturbative QCD calculations agree with the data within the theoretical and experimental uncertainties.

Figures

Figure 1

Efficiency of the EMCal trigger as a function of the cluster energy measured in the calorimeter.
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Figure 2

$\pt$-differential invariant yield of inclusive electrons compared to the electron background cocktail for the TPC-TOF/TPC analysis (top) and the TPC-EMCal analysis (bottom). Ratios of the inclusive electron yields to therespective cocktail are shown in the lower panels.
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Figure 3

$\pt$-differential cross section of electrons from heavy-flavor hadron decays compared to pQCD calculations from FONLL (red), GM-VFNS (blue) and $k_{{\rm T}}$-factorization (green). Uncertainties on the theory calculations originate from the variation of the factorization and the renormalization scales and from the heavy-quark masses. The ratios data/theory are shown in the lower panels, where the dashed lines indicate the additional theoretical uncertainties relative to unity.
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