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Dependence of the non-photonic electron spectrum on the charmed baryon-to-meson ratio

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Abstract

In this talk I argue that a substantial fraction of the non-photonic electron suppression in Au+Au collisions could arise as a result of an enhanced Λc/D ratio rather than purely from jet-quenching. At intermediate transverse momentum (2<pT<6 GeV/c), the baryon-to-meson ratio 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 Λc/D ratio. I show the dependence of the non-photonic electron spectrum on the baryon-to-meson ratio for charm hadrons. As an example, I assume that the Λc/D ratio is the same as the Λ/K0 S ratio. I show that 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 will be suppressed relative to Nbin scaled p+p collisions by as much as 20%.

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Authors and Affiliations

  1. Brookhaven National Laboratory, Upton, NY, 11973, USA

    P. Sorensen

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  1. P. Sorensen
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Correspondence to P. Sorensen.

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PACS

25.75.-q; 25.75.Dw

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Sorensen, P. Dependence of the non-photonic electron spectrum on the charmed baryon-to-meson ratio. Eur. Phys. J. C 49, 379–382 (2007). https://doi.org/10.1140/epjc/s10052-006-0108-3

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  • DOI: https://doi.org/10.1140/epjc/s10052-006-0108-3

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