Light-Meson Two-Photon Decays in Full QCD

Conference · Tue Jun 30 04:00:00 EDT 2009 · Proceedings of The XXVI International Symposium on Lattice Field Theory — PoS(LATTICE 2008)

DOI:https://doi.org/10.22323/1.066.0159· OSTI ID:2000526

Cohen, Saul; Lin, Huey-Wen; Dudek, Jozef; Edwards, Robert

We present a study of two-photon decays of light mesons, focusing on the neutral pion decay. This important process highlights the effects of the axial anomaly in QCD but has been little studied on the lattice. By applying the Lehmann-Symanzik-Zimmermann (LSZ) reduction formula, we reconstruct the electromagnetic matrix elements from three-point vector-vector Green functions calculated on 2+1-flavor isotropic clover lattices.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 2000526
• Report Number(s): JLAB-THY-08-906; arXiv:0810.5550; DOE/OR/23177-0528
• Conference Information: Journal Name: Proceedings of The XXVI International Symposium on Lattice Field Theory — PoS(LATTICE 2008)
• Country of Publication: United States
• Language: English