Summary
We present differential cross-sections for pp elastic scattering at eight laboratory momenta from 1.50 to 2.06 GeV/c. The data are analysed using an 8-parameter optical modelà la Frahn and Venter. However, the best representation of the differential cross-sections is obtained by combining the glory model with a parametrization of the scattering amplitude in terms of coherent exponentials. Both representations show the dominance of the partial wave with orbital angular momentum equal to four.
Riassunto
Si presentano sezioni d’urto differenziali per lo scattering elastico pp a 8 impulsi di laboratorio da 1.50 a 2.06 GeV/c. Si analizzano i dati mediante un modello ottico a 8 parametrià la Frahn e Venter. Comunque, la migliore rappresentazione delle sezioni d’urto differenziali è ottenuta combinando il modello di «glory» con una parametrizzazione dell’ampiezza di scattering in termini degli esponenziali coerenti. Entrambe le rappresentazioni mostrano il predominio dell’onda parziale con impulso angolare orbitale uguale a 4.
Реэюме
Мы приводим дифференциальные поперечные сечения для упругого рассеяния антипротонов на протонах при восьми эначениях импульса от 1.50 до 2.06 ГзВ/с в лабораторной системе координат. Полученные данные аналиэируются, испольэуя восьми-параметриче скую оптическую модель, типа модели Франа и Вентера. Однако наилучщее представление для дифференциальных поперечных сечений получается при общединении «глория»-модели с параметриэацией амплитуды рассеяния с помошью когерентных зкспонент. Оба представления укаэывают на доминантность парциальной волны с орбитальным моментом равным четырем.
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Work supported in part by the Swiss National Science Foundation and by the U. K. Science Research Council.
This experiment would not have been possible without the diligent and skilled efforts of our scanning and measuring staffs.
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Jayet, B., Gailloud, M., Rosselet, P. et al. Large-angle antiproton-proton elastic scattering between 1.50 and 2.06 GeV/c. Nuov Cim A 45, 351–370 (1978). https://doi.org/10.1007/BF02730076
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DOI: https://doi.org/10.1007/BF02730076