New measurements of the D0 and D+ lifetimes
نویسندگان
چکیده
منابع مشابه
Measurement of the D0 and D+ lifetimes.
We have used a high-resolution drift chamber in the Mark II Detector at PEP 5 to metiure the lifetimes of Do and D+ mesons produced in e+eannihilations at 29 GeV. Based on a sample of74 decays for the Do mesons and 23 decays for the D+ mesons, the lifetimes are found to be 4.7fi:i f 0.5 x lo-l3 set and 8 9f3*8 . 2., f 1.3 x lo-l3 set, respectively. This leads to a ratio of lifetimes of 1.9”;.“,...
متن کاملNew measurements of the D 0 and D + lifetimes
A high statistics sample of photoproduced charm particles from the FOCUS (E831) experiment at Fermilab has been used to measure the D and D lifetimes. Using about 210 000 D and 110 000 D events we obtained the following values: 409.6± 1.1 (statistical)± 1.5 (systematic) fs for D and 1039.4± 4.3 (statistical)± 7.0 (systematic) fs for D. The study of the charm hadron lifetimes has been fundamenta...
متن کاملMeasurement of the D0, D+, and Ds+ meson lifetimes.
We report measurements of the lifetimes of the D, D+, and D,+ (F+) mesons produced in e+e collisions at a center-of-mass energy of 29 GeV. The decay vertex distribution in the processes D ~K rr+, D+~E n+n+, and . D+~Prr+ were made using a vertex chamber installed in the High Resolution Spectrometer at the SLAC storage ring PEP. The measured lifetimes are ~ 0=(4.4+1.0%0.6)X10 ' s, w +=(9.2+,'3+1...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2002
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(02)01934-2