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The invariant differential cross section for inclusive electron production inp+p collisions at sqrt(s) = 200 GeV has been measured by the PHENIX experimentat the Relativistic Heavy Ion Collider over the transverse momentum range $0.4<= p_T <= 5.0 GeV/c at midrapidity (eta <= 0.35). The contribution to theinclusive electron spectrum from semileptonic decays of hadrons carrying heavyflavor, i.e. charm quarks or, at high p_T, bottom quarks, is determined viathree independent methods. The resulting electron spectrum from heavy flavordecays is compared to recent leading and next-to-leading order perturbative QCDcalculations. The total cross section of charm quark-antiquark pair productionis determined as sigma_(c c^bar) = 0.92 +/- 0.15 (stat.) +- 0.54 (sys.) mb.

physical review letters

Single Electrons from Heavy-Flavor Decays in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mo>+</mml:mo><mml:mi>p</mml:mi></mml:math>Collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>200</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>GeV</mml:mi></mml:math>

Single Electrons from Heavy-Flavor Decays inp+pCollisions ats=200 GeV