Further remarks on $ππ$ scattering dispersion relations

Details Further remarks on $ππ$ scattering dispersion relations Further remarks on $ππ$ scattering dispersion relations

2002-06-25

arxiv.org/abs/hep-ph/0206247v2

CHIN. PHYS. LETT. 20 (2003)342

Physics

High Energy Physics

High Energy Physics - Phenomenology

replace with revised version to appear in Chinese Physics Letters. Numerical calculation improved. $M_\sigma\simeq 483 {\rm

Scientific paper

10.1088/0256-307X/20/3/308

The naive use of higher order perturbation theory leads the left--hand cut integrals in $\pi\pi$ dispersion relations~\cite{hjy,Xiao01} divergent. This problem is discussed and solved. Also we point out that the Adler zero condition imposes three constraints on the dispersion relations. The $\sigma $ pole position is determined using the improved method, $M_\sigma= 483\pm 13 {\rm MeV}$,$\Gamma_\sigma= 705 \pm 50{\rm MeV}$. The scattering length parameter is found to be in excellent agreement with the experimental result.

Affiliated with

Also associated with

No associations

Rating

Further remarks on $ππ$ scattering dispersion relations 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 Further remarks on $ππ$ scattering dispersion relations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Further remarks on $ππ$ scattering dispersion relations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-391750