Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10725527 | Physics Letters B | 2011 | 5 Pages |
Abstract
We study the light-front zero-mode contribution to the tensor form factors Ti (i=1,2,3) for the exclusive rare PâVâ+ââ decays using a covariant fermion field theory model in (3+1) dimensions. While the zero-mode contribution in principle depends on the form of the vector meson vertex Îμ=γμâ(2kâPV)μ/D, the three tensor form factors Ti(i=1,2,3) are found to be free from the zero mode if the denominator D contains the term proportional to the light-front energy or the longitudinal momentum fraction factor (1/x)n of the struck quark with the power n>0. Since the denominator D used in the light-front quark model (LFQM) has the power n=1/2, the three tensor form factors Ti (i=1,2,3) can be computed in LFQM safely without involving any complicate zero-mode contribution. The lack of zero-mode contribution benefits the phenomenology with LFQM.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Ho-Meoyng Choi, Chueng-Ryong Ji,