Finite size effects of a pion matrix element |
| |
| Affiliation: | 2. Department of Physiology & Pharmacology, School of Medicine, Oregon Health & Science University, Portland, Oregon, USA;3. Alcohol Research and Treatment Clinic, Addiction Medicine Services, Ambulatory Care and Structured Treatments, Centre for Addiction and Mental Health, Toronto, Ontario, Canada;4. Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada;5. Department of Family and Community Medicine, University of Toronto, Toronto, Ontario, Canada |
| |
| Abstract: | We investigate finite size effects of the pion matrix element of the non-singlet, twist-2 operator corresponding to the average momentum of non-singlet quark densities. Using the quenched approximation, they come out to be surprisingly large when compared to the finite size effects of the pion mass. As a consequence, simulations of corresponding nucleon matrix elements could be affected by finite size effects even stronger which could lead to serious systematic uncertainties in their evaluation. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
