Suppression of Non-photonic Electrons from Enhancement of Charm Baryons in Heavy Ion Collisions
P. R. Sorensen, X. Dong
Abstract
At intermediate transverse momentum (2 < pT < 6 GeV/c), baryon production in Au+Au collisions is enhanced compared to p+p collisions. Since charm baryon decays produce electrons less frequently than charm meson decays, the non-photonic electron spectrum is sensitive to the Lambdac/D ratio. In this report we study the dependence of the non-photonic electron spectrum on the baryon-to-meson ratio for charm hadrons. As an example, we take the Lambdac/D ratio to have the same form as the Lambda/K0S ratio. In this case, even if the total charm quark yield in Au+Au collisions scales with the number of binary nucleon-nucleon collisions (Nbin), the electron spectrum at 2 < pT < 5 GeV/c is suppressed relative to Nbin scaled p+p collisions by as much as 20%.
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