用STAR探测器测量$\sqrt{s} = 200$ GeV上$p$ + $p$碰撞中开放重味强子衰变的包容电子
Measurement of inclusive electrons from open heavy-flavor hadron decays in $p$+$p$ collisions at $\sqrt{s} = 200$ GeV with the STAR detector
摘要:
我们报道了在$\sqrt{s} = 200$ GeV的$p$ + $p$碰撞中,在中等快度($|y|<$ 0.7)下,从开放重味强子衰变中产生包容电子的截面随横动量($p_{\rm T}$)的变化的新测量结果.给出了2.5 $<p_{\rm T}<$ 10 GeV/ $c$的计算结果,与以前的测量结果相比,精度提高到6 GeV/ $c$以上,为微扰QCD计算提供了更多的约束.此外,该测量也提供了一个高精度的参考测量的核修改因子的包容电子从开放的魅力和底强子衰变的重离子碰撞。
英文摘要:
We report a new measurement of the production cross section for inclusive electrons from open heavy-flavor hadron decays as a function of transverse momentum ($p_{\rm T}$) at mid-rapidity ($|y|<$ 0.7) in $p$+$p$ collisions at $\sqrt{s} = 200$ GeV. The result is presented for 2.5 $<p_{\rm T}<$ 10 GeV/$c$ with an improved precision above 6 GeV/$c$ with respect to the previous measurements, providing more constraints on perturbative QCD calculations. Moreover, this measurement also provides a high-precision reference for measurements of nuclear modification factors for inclusive electrons from open-charm and -bottom hadron decays in heavy-ion collisions.
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