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Fitting of Sigma_c baryon signalsдипломная работа (Магистр)
- Научные руководители: Горелов И.В., Seidel S.C.
- Автор: Schmidt Richard
- Тип: Магистр
- Год защиты: 2006
- Аннотация: Using the CDF Run II data with a luminosity of 355/pb, we measure the natural widths of and the mass splitting between Sigma_c0 and Sigma_c++ as reconstructed through their decay to Lambda_c+ pi+-. Our main focus is the fitting of the mass difference spectra. We measure m(Sigma_c++)-m(Sigma_c0) =( −0.03 ± 0.26(stat)(+0.07−0.09)(syst) ) MeV/c**2, so that there is no evidence for an isospin mass splitting between the Sigma_c0 and Sigma_c++ isotriplet. The measured natural widths are Gamma(Sigma_c0)= (1.4 ± 0.7 +0.8−0.4) MeV/c**2 and Gamma(Sigma_c++) = (1.6 ± 0.8 +0.5−0.3 ) MeV/c**2. The systematic errors quoted here relate to the fitting procedure only.
- Добавил в систему: Горелов Игорь Владимирович