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University of Birmingham, Birmingham, United Kingdom.
Phys Rev Lett. 2003 Aug 15;91(7):072304. doi: 10.1103/PhysRevLett.91.072304.
We report measurements of single-particle inclusive spectra and two-particle azimuthal distributions of charged hadrons at high transverse momentum (high p(T)) in minimum bias and central d+Au collisions at sqrt[s(NN)]=200 GeV. The inclusive yield is enhanced in d+Au collisions relative to binary-scaled p+p collisions, while the two-particle azimuthal distributions are very similar to those observed in p+p collisions. These results demonstrate that the strong suppression of the inclusive yield and back-to-back correlations at high p(T) previously observed in central Au+Au collisions are due to final-state interactions with the dense medium generated in such collisions.
我们报告了在(\sqrt{s_{NN}} = 200)GeV的最小无偏和中心(d + Au)碰撞中，高横向动量（高(p_T)）下带电强子的单粒子包容性谱和两粒子方位角分布的测量结果。相对于二元标度的(p + p)碰撞，(d + Au)碰撞中的包容性产额有所增强，而两粒子方位角分布与在(p + p)碰撞中观察到的非常相似。这些结果表明，先前在中心(Au + Au)碰撞中观察到的高(p_T)下包容性产额和背对背关联的强烈抑制是由于与此类碰撞中产生的致密介质的末态相互作用所致。
