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arXiv · hep-ph/0301141

Counting Rule for Hadronic Light-Cone Wave Functions

Xiangdong Ji·Jian-Ping Ma·Feng Yuan
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Abstract

We introduce a systematic way to write down the Fock components of a hadronic light-cone wave function with $n$ partons and orbital angular momentum projection $l_z$. We show that the wave function amplitude $ψ_n(x_i,k_{i\perp},l_{zi})$ has a leading behavior $1/(k^2_\perp)^{[n+|l_z|+{\rm min}(n'+|l_z'|)]/2-1}$ when all parton transverse momenta are uniformly large, where $n'$ and $l_z'$ are the number of partons and orbital angular momentum projection, respectively, of an amplitude that mixes under renormalization. The result can be used as a constraint in modeling the hadronic light-cone wave functions. We also derive a generalized counting rule for hard exclusive processes involving parton orbital angular momentum and hadron helicity flip.

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Xiangdong Ji, Jian-Ping Ma, Feng Yuan. 2003-01-17. Counting Rule for Hadronic Light-Cone Wave Functions. https://doi.org/10.1103/physrevlett.90.241601

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