Convoluting jet spectra with fragmentation functions: a cross-check of the charged particle p_T spectrum
Convoluting jet spectra with fragmentation functions: a cross-check of the charged particle p_T spectrum
复制标题
具有碎裂函数的卷积射流谱：带电粒子 p_T 谱的交叉检查
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
G. Roland
中科院分区：
文献类型：
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作者：
A. Yoon;E. Wenger;G. Roland
出于下一个领导阶pQCD计算和包含喷流谱测量CDF之间的良好协议，我们交叉检查PYTHIA碎裂功能。用未修正的PYTHIA碎裂函数对喷流谱进行卷积，结果在整个感兴趣的p_T范围内与PYTHIA带电粒子谱有合理的一致性，而在p_T=30 GeV/c以上与测量的带电粒子谱有相当大的不一致。为了理解这种差异的来源，我们引入了一些越来越不同的玩具模型碎片函数的卷积。然而，即使是最极端的碎裂函数也会导致高p_T CDF谱的低估，这与测量的喷流谱仍然不一致。
Motivated by the excellent agreement between next-to-leading-order pQCD calculations and the inclusive jet spectra measured by CDF, we cross-check PYTHIA fragmentation functions. The convolution of the measured jet spectra with unmodified PYTHIA fragmentation functions results in reasonable agreement with the PYTHIA charged particle spectrum over the entire p_T range of interest, while there is a sizable disagreement with the measured charged particle spectrum above p_T=30 GeV/c. In an attempt to understand the source of this discrepancy, we introduce a number of increasingly different toy-model fragmentation functions for the convolution. However, even the most extreme fragmentation functions result in an underestimate of the high-p_T CDF spectrum, which remains irreconcilable with the measured jet spectra.
Tevatron 中高横向动量带电强子生产的因式分解？
影响因子：
8.6
作者：
S. Albino;B. A. Kniehl;G. Kramer
通讯作者：
G. Kramer