Perturbative prediction for parton fragmentation into heavy hadron

1997/05/28 by J. P. Ma, J.P. Ma · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1016/s0550-3213(97)00484-7

published as Nucl.Phys.B506:329-347,1997 · 21 pages + 3 pages figures, plain tex

arxiv created 1997/05/28 · openalex publication_date 1997/11/01 · arxiv updated 2011/01/25 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

By expanding functions of parton fragmentation into a heavy hadron in the inverse of the heavy quark mass m_Q we attempt to factorize them into perturbative- and nonperturbative parts. In our approach the nonperturbative parts can be defined as matrix elements in heavy quark effective theory, the shape of the functions is predicted by perturbative QCD. In this work we neglect effect at order of m_Q^-2 and calculate the perturbative parts at one-loop level for heavy quark- and gluon fragmentation. We compare our results from leading log approximation with experimental results from e⁺e^- colliders and find a deviation below or at 10% level. Adding effect of higher order in α_s it can be expected to reduce the deviation. The size of matrix elements appearing at the order we consider for several types of heavy hadrons is determined.

Citations

• Using heavy quark fragmentation into heavy hadrons to determine QCD parameters and test heavy quark symmetry
• Parton distribution and decay functions
• Heavy quark fragmentation to polarised quarkonium
• Heavy quark fragmentation into heavy mesons
• Quark fragmentation into<mml:mprescripts/>3PJquarkonium

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