Determination of Two-Loop $ππ$ Scattering Amplitude Parameters

Details Determination of Two-Loop $ππ$ Scattering Amplitude Parameters Determination of Two-Loop $ππ$ Scattering Amplitude Parameters

1995-12-22

arxiv.org/abs/hep-ph/9512404v2

Nucl.Phys. B471 (1996) 445-470

Physics

High Energy Physics

High Energy Physics - Phenomenology

A mistake in formulas (48) is corrected, as well as the corresponding numerical values (49)

Scientific paper

10.1016/0550-3213(96)00187-3

The chiral expansion of the $\pi\pi$ amplitude to the order of two loops was expressed in terms of six independent parameters in a previous paper: four of these are shown here to satisfy sum rules. Their derivation, where crossing symmetry plays a key role, is explained. Their convergence properties are studied and their practical evaluation, in terms of the available data on $\pi\pi$ phase shifts above 0.5 GeV, is discussed. Below 0.5 GeV, the chiral amplitude itself is employed, such that the parameters are determined in a self-consistent way. Some care is devoted to the estimate of the errors.

Affiliated with

Also associated with

No associations

Rating

Determination of Two-Loop $ππ$ Scattering Amplitude Parameters 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 Determination of Two-Loop $ππ$ Scattering Amplitude Parameters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determination of Two-Loop $ππ$ Scattering Amplitude Parameters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-621439