A note on the CDF high-p_t charged particle excess
A note on the CDF high-p_t charged particle excess
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DOI：
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发表时间：
2010-03
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影响因子：
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通讯作者：
M. Cacciari;G. Salam;M. Strassler
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文献类型：
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作者：
M. Cacciari;G. Salam;M. Strassler
最近有人指出，高p_t带电粒子横截面的CDF数据比QCD预测的多出三个数量级，这一特征被暂时归因于可能违反因子分解。我们观察到，当p_t > 80 GeV时，测量的带电粒子截面与喷流截面在同一数量级。将这些信息与射流内带电粒子分布的数据相结合，可以排除CDF数据可以用QCD因子分解破坏来解释的假设。我们还评论的困难，解释过剩的新的物理场景。
It has recently been pointed out that CDF data for the cross section of high-p_t charged particles show an excess of up to three orders of magnitude over QCD predictions, a feature tentatively ascribed to possible violations of factorisation. We observe that for p_t > 80 GeV the measured charged-particle cross sections become of the same order as jet cross sections. Combining this information with data on charged particle distributions within jets allows us to rule out the hypothesis that the CDF data could be interpreted in terms of QCD factorisation violation. We also comment on the difficulty of interpreting the excess in terms of new physics scenarios.