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arXiv · hep-lat/0211037

The Second Moment of the Pion Light Cone Wave Function

Luigi Del Debbio·Massimo Di Pierro·Alex Dougall
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Abstract

We present a preliminary result for second moment of the light cone wave function of the pion. This parameter is the subject of a discrepancy between theoretical predictions (coming from lattice and sum rules) and a recent experimental result (that remarkably agrees with purely perturbative predictions). In this work we exploit lattice hypercubic symmetries to remove power divergences and, moreover, implement a full 1-loop matching for all the contributing operators.

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Luigi Del Debbio, Massimo Di Pierro, Alex Dougall. 2002-11-21. The Second Moment of the Pion Light Cone Wave Function. https://doi.org/10.1016/s0920-5632(03)01572-x

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