A calculation of the SU(3) pion electric form factor on an 103×29 lattice at β=5.9 using a technique that treats the zero momentum pion field as a secondary source is described.
|Number of pages||7|
|Journal||Nuclear Physics B - Proceedings Supplements|
|State||Published - Apr 1988|
Bibliographical noteFunding Information:
2. TECHNICAL ASPECTS Since SST has been explained in other contexts 5, we will not elaborate on it further here, but will simply state how this technique has been applied. In previous workl'3, 7 an actual source exponentiation was carried out. That is, the current density operator at some fixed time position and spatial momentum, multiplied by a parameter a << 1, was included in the fermion action. A numerical derivative of the two points function was then taken with respect to a, which produced the desired three point function at a single value of spatial momentum transfer. SST is superior to this numerical derivative method since it produces exactly the desired combination of two point functions. The use of SST to simulate the effect of, for example, axial or vector current densities, has * This research was supported in part by the Natural Sciences and Engineering Research Council of Canada and in pan by the U.S. Department of Energy under grant DE-FG05-84ER40154.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics