Masses, widths, and leptonic widths of the higher upsilon resonances.
نویسندگان
چکیده
The masses, total widths, and leptonic widths of three triplet s-wave bb states Y(4S), Y (5S), and Y(6S) are determined from measurements of the e+e annihilation cross section into hadrons for 10.55 & W & 11.25 GeV. The resonances are identified from potential model results and their properties are obtained with the help of a simplified coupled-channels calculation. We find M(4S) = 10.577 GeV, I (4S) = 25 MeV, I' (4S) = 0.28 keV; M(5S) = 10.845 GeV, I'(5S) = 110 MeV, I' (5S)= 0.37 keV; M(6S) = 11.02 GeV, I (6S) = 90 MeV, I' (6S) = 0.16 keV.
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ورودعنوان ژورنال:
- Physical review letters
دوره 54 5 شماره
صفحات -
تاریخ انتشار 1985