Nonvanishing zero modes in the light-front current
We find that the zero mode (q+= 0 mode of a continuum theory) contribution is crucial to
obtaining the correct values of the light-front current J− in the Drell-Yan (q+= 0) frame. In the
exactly solvable model of (1+ 1)-dimensional scalar field theory interacting with gauge fields,
we quantify the zero-mode contribution and observe that the zero-mode effects are very
large for the light meson form factors even though they are substantially reduced for the
heavy meson cases.
obtaining the correct values of the light-front current J− in the Drell-Yan (q+= 0) frame. In the
exactly solvable model of (1+ 1)-dimensional scalar field theory interacting with gauge fields,
we quantify the zero-mode contribution and observe that the zero-mode effects are very
large for the light meson form factors even though they are substantially reduced for the
heavy meson cases.
Abstract
We find that the zero mode (q+= 0 mode of a continuum theory) contribution is crucial to obtaining the correct values of the light-front current J− in the Drell-Yan (q+= 0) frame. In the exactly solvable model of (1+ 1)-dimensional scalar field theory interacting with gauge fields, we quantify the zero-mode contribution and observe that the zero-mode effects are very large for the light meson form factors even though they are substantially reduced for the heavy meson cases.
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