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arXiv · 1003.5928

Convoluting jet spectra with fragmentation functions: a cross-check of the charged particle p_T spectrum

Andre S. Yoon·Edward Wenger·Gunther Roland
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Abstract

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.

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Andre S. Yoon, Edward Wenger, Gunther Roland. 2010-03-30. Convoluting jet spectra with fragmentation functions: a cross-check of the charged particle p_T spectrum. https://arxiv.org/abs/1003.5928

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