التفاصيل البيبلوغرافية
| العنوان: |
The ITEP study of inclusive pion double charge exchange: Experiment and interpretation. |
| المؤلفون: |
Abramov, B. M., Alvarez-Ruso, L., Borodin, Yu. A., Bulychjov, S. A., Dukhovskoi, I. A., Kaidalov, A. B., Khanov, A. I., Krutenkova, A. P., Kulikov, V. V., Matsuk, M. A., Radkevich, I. A., Sutormin, A. I., Turdakina, E. N., Vacas, M. J. Vicente |
| المصدر: |
AIP Conference Proceedings. 2001, Vol. 603 Issue 1, p515. 4p. |
| مصطلحات موضوعية: |
*PION double charge exchange, *PIONS |
| مستخلص: |
The inclusive pion double charge exchange (DCX) on light nuclei at intermediate energies T[sub o] = 0.59, 0.75 and 1.1 GeV was studied recently in the ITEP experiment on π[sup -]A interactions. The differential cross sections of these processes decrease with energy rather weakly and exceed the theoretical prediction within the conventional sequential single charge exchange mechanism with neutral pion in the intermediate state (i.e. Glauber elastic rescattering) at the highest energy by about a half an order of magnitude. Our updated analysis of the data on [sup 16]O (as well as new outgoing pion momentum spectra on [sup 16]O and [sup 6,7]Li at 0.59 GeV and some auxiliary measurements) confirms our evidence for this anomalous DCX energy behavior. Thus other mechanisms of DCX are needed to explain the observed energy dependence. The theoretical analysis showed that the Glauber inelastic rescatterings (IR) mediated by intermediate states of several (mainly two) pions appeared to give an important contribution to the inclusive DCX cross section at energies T[sub o] > 0.6 GeV. To estimate the IR contribution in the framework of Gribov-Glauber approach to DCX, the OPE model which is known to give a good description of π[sup -]p → π[sup +]π[sup -]n reaction above ∼ 2 GeV/c is used. It is shown that IR with 2π intermediate state dominate the pion DCX in a wide energy range above ∼ 1 GeV. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
Academic Search Index |