Two-Pion Production in Proton-Proton Collisions with Polarized Beam
Abstract
The two-pion production reaction was measured with a polarized proton beam at 750 and 800 MeV using the short version of the COSY-TOF spectrometer. The implementation of a delayed pulse technique for Quirl and central calorimeter provided positive identification in addition to the standard particle identification, energy determination as well as time-of-flight and angle measurements. Thus all four-momenta of the emerging particles could be determined with 1-4 overconstraints. Total and differential cross sections as well as angular distributions of the vector analyzing power have been obtained. They are compared to previous data and theoretical calculations. In contrast to predictions we find significant analyzing power values up to = 0.3.
Keywords
Cite
@article{arxiv.0806.3870,
title = {Two-Pion Production in Proton-Proton Collisions with Polarized Beam},
author = {S. Abd El-Bary and S. Abd El-Samad and R. Bilger and K. -Th. Brinkmann and H. Clement and M. Dietrich and E. Doroshkevich and S. Dshemuchadse and A. Erhardt and W. Eyrich and A. Filippi and H. Freiesleben and M. Fritsch and R. Geyer and A. Gillitzer and C. Hanhart and J. Hauffe and K. Haug and D. Hesselbarth and R. Jaekel and B. Jakob and L. Karsch and K. Kilian and H. Koch and J. Kress and E. Kuhlmann and S. Marcello and S. Marwinski and R. Meier and K. Moeller and H. P. Morsch and L. Naumann and J. Ritman and E. Roderburg and P. Schoenmeier and M. Schulte-Wissermann and W. Schroeder and M. Steinke and F. Stinzing and G. Y. Sun and J. Waechter and G. J. Wagner and M. Wagner and U. Weidlich and A. Wilms and P. Wintz and S. Wirth and G. Zhang and P. Zupranski},
journal= {arXiv preprint arXiv:0806.3870},
year = {2008}
}