کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10725307 | 1034112 | 2006 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hyperon production in the channel ppâK+Îp near the reaction threshold
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
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چکیده انگلیسی
Hyperon production in the threshold region was studied in the reaction ppâK+Îp using the time-of-flight spectrometer COSY-TOF. Exclusive data, covering the full phase-space, were taken at three different beam momenta pbeam=2.59, 2.68 and 2.85 GeV/c (corresponding to excess energies of É=85, 115 and 171 MeV). Total cross-sections were deduced to be 7.4±0.5 μb, 8.6±0.6 μb and 16.5±0.4 μb, respectively. Differential observables including Dalitz plots were obtained. From the investigation of the Dalitz plot at pbeam=2.85 GeV/c a dominant contribution of the Nâ(1650)-resonance to the reaction mechanism was found. In addition the pÎ-final-state interaction turned out to have a significant influence on the Dalitz plot distribution even 171 MeV above threshold.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 632, Issue 1, 5 January 2006, Pages 27-34
Journal: Physics Letters B - Volume 632, Issue 1, 5 January 2006, Pages 27-34
نویسندگان
COSY-TOF Collaboration COSY-TOF Collaboration, S. Abd El-Samad, R. Bilger, A. Böhm, K.-Th. Brinkmann, H. Clement, S. Dshemuchadse, W. Eyrich, A. Erhardt, C. Fanara, A. Filippi, H. Freiesleben, M. Fritsch, R. Geyer, J. Hauffe, A. Hassan, P. Herrmann,