The second moment of the pion light cone wave function

✍ Scribed by Luigi Del Debbio; Massimo Di Pierro; Alex Dougall

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 106 KB
• Volume: 119
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/s0920-5632(03)01572-x

✦ Synopsis

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 l-loop matching for all the contributing operators.