Dispersion $γZ$-box correction to the weak charge of the proton

Details Dispersion $γZ$-box correction to the weak charge of the proton Dispersion $γZ$-box correction to the weak charge of the proton

2008-11-04

arxiv.org/abs/0811.0614v1

Phys.Rev.Lett.102:091806,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures, revtex4

Scientific paper

10.1103/PhysRevLett.102.091806

We consider elastic scattering of electrons off a proton target. The parity violating (PV) asymmetry arises at leading order in $\alpha$ due to interference of $\gamma$ and $Z$ exchange. The radiative corrections to this leading mechanism were calculated in the literature and included in experimental analyses, except for $\gamma Z$ box and cross-box contributions. We present here a dispersion calculation of these corrections in forward kinematics. We demonstrate that at the GeV energies of current PV experiments, such corrections are not suppressed by the small vector weak charge of the electron, as occurs in the atomic PV. Our results suggest that the current theoretical uncertainty in the analysis of the QWEAK experiment might be substantially underestimated, and more accurate account of the dispersion corrections are needed in order to interprete the PV data.

Affiliated with

Also associated with

No associations

Rating

Dispersion $γZ$-box correction to the weak charge of the proton does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dispersion $γZ$-box correction to the weak charge of the proton, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dispersion $γZ$-box correction to the weak charge of the proton will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-372609