New results in rho^0 meson physics

Details New results in rho^0 meson physics New results in rho^0 meson physics

1997-07-29

arxiv.org/abs/hep-ph/9707509v2

Eur.Phys.J.C2:269-286,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

34 pages with 7 figures. Published version also available at http://link.springer.de/link/service/journals/10052/tocs/t8002002

Scientific paper

10.1007/s100520050137

We compare the predictions of a range of existing models based on the Vector Meson Dominance hypothesis with data on e^+ e^- -> pi^+ pi^$ and e^+ e^- -> mu^+ mu^- cross-sections and the phase and near-threshold behavior of the timelike pion form factor, with the aim of determining which (if any) of these models is capable of providing an accurate representation of the full range of experimental data. We find that, of the models considered, only that proposed by Bando et al. is able to consistently account for all information, provided one allows its parameter "a" to vary from the usual value of 2 to 2.4. Our fit with this model gives a point-like coupling (gamma pi^+ \pi^-) of magnitude ~ -e/6, while the common formulation of VMD excludes such a term. The resulting values for the rho mass and pi^+ pi^- and e^+e^- partial widths as well as the branching ratio for the decay omega -> pi^+ pi^- obtained within the context of this model are consistent with previous results.

Affiliated with

Also associated with

No associations

Rating

New results in rho^0 meson physics 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 New results in rho^0 meson physics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New results in rho^0 meson physics will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-207773