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arXiv 1010.0262hep-ex
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用新技术精确研究ppbar碰撞中Z/gamma* 玻色子的横动量分布

Precise study of the Z/gamma* boson transverse momentum distribution in ppbar collisions using a novel technique

D0 Collaboration, V. M. Abazov

摘要:

利用费米实验室Tevatron D 0探测器收集的7.3 pb-1 ppbar碰撞,我们测量了变量\phistar的分布,它探测了与Z/gamma* 玻色子横动量相同的物理效应,但不太容易受到实验分辨率和效率的影响。一个QCD预测被发现描述的一般特点的\phistar分布,但无法描述其详细的形状或依赖于玻色子快度。对于小的部分子动量分数值,包括横向动量加宽的预测是非常不受欢迎的。

英文摘要:

Using 7.3 pb-1 of ppbar collisions collected by the D0 detector at the Fermilab Tevatron, we measure the distribution of the variable \phistar, which probes the same physical effects as the Z/gamma* boson transverse momentum, but is less susceptible to the effects of experimental resolution and efficiency. A QCD prediction is found to describe the general features of the \phistar distribution, but is unable to describe its detailed shape or dependence on boson rapidity. A prediction that includes a broadening of transverse momentum for small values of the parton momentum fraction is strongly disfavored.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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