Asymmetry observables in e+ e- --> pi+ pi- gamma in the phi region within a chiral unitary approach

Details Asymmetry observables in e+ e- --> pi+ pi- gamma in the phi region within a chiral unitary approach Asymmetry observables in e+ e- --> pi+ pi- gamma in the phi region within a chiral unitary approach

2009-11-05

arxiv.org/abs/0911.0994v1

Phys.Rev.D81:014010,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1103/PhysRevD.81.014010

We make a theoretical study of the charge and forward-backward pion asymmetries in the e+e- --> pi+ pi- gamma process on and off the phi resonance energy. These observables are rather sensitive to the inner details of the theoretical models to describe the reaction. In addition to the standard implementation of the initial state radiation (ISR) and the Bremsstrahlung contribution to the final state radiation (FSR), we use the techniques of the chiral unitary approach to evaluate the contribution from the mechanisms of phi decay into pi+pi-gamma. This contribution involves the implementation of final state interaction from direct chiral loops, the exchange of vector and axial-vector resonances and the final state interaction through the consideration of the meson-meson unitarized amplitudes, which where found important in a previous work describing the phi --> pi pi gamma. We find a good reproduction of the experimental data from KLOE for the forward-backward asymmetry, both at the phi peak and away from it. We also make predictions for the angular distributions of the charge asymmetry and show that this observable is very sensitive to the chiral loops involved in phi radiative decay.

Affiliated with

Also associated with

No associations

Rating

Asymmetry observables in e+ e- --> pi+ pi- gamma in the phi region within a chiral unitary approach 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 Asymmetry observables in e+ e- --> pi+ pi- gamma in the phi region within a chiral unitary approach, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Asymmetry observables in e+ e- --> pi+ pi- gamma in the phi region within a chiral unitary approach will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-417852