Speaker
Dr
Dmitry Ryabchikov
(Institute for High Energy Physics)
Description
The reaction pi-Pb->pi-pi-pi+Pb with E_beam = 190 GeV
is studied in great detail by Partial-Wave analysis methods.
The low momentum transfer region t' < 0.01 GeV/c^2 shows the dominance of
coherent diffraction production mechanism and also clear contribution of Coulomb production.
For several M=1 amplitudes the intensities as functions of t'
demonstrate very sharp peaks near zero, characteristic for photon exchange, while phase motions as functions of t' show significant variation
which reflects the interference of Coulomb and strong processes.
Theoretical description of measured intensities and phases can provide precise separation
of Coulomb contribution (and thus give better measurement of
a2(1320) radiative width as an example) as well as better knowledge of absolute phase of
strong diffractive amplitude (and so properties of the pomeron regge trajectory).
Primary author
Dr
Dmitry Ryabchikov
(Institute for High Energy Physics)
