ISSN:
1434-6052
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We present the final results on the measurement of the masses and lifetimes of the mesonsD 0,D + andD s + in the NA32 experiment at the CERN SPS, using silicon microstrip detectors and charge-coupled devices for vertex reconstruction. We measure the following lifetimes: $$\tau _{D^0 } = 3.88 \pm _{0.21}^{0.23} \cdot 10^{ - 13} s$$ using a sample of 479D°→K −π+π−π+ and 162D°→K −π+ decays; $$\tau _{D^ + } = 10.5 \pm _{0.72}^{0.77} \cdot 10^{ - 13} s$$ with a sample of 317D +→K −π+π+ decays; $$\tau _{D_s^ + } = 4.69 \pm _{0.86}^{1.02} \cdot 10^{ - 13} s$$ with a sample of 54D s + →K + K −π+ decays. We measure the following masses:m D 0=1864.6±0.3±1.0 MeV,m D +=1870.0±0.5±1.0 MeV and $$m_{D_s^ + } $$ =1967.0±1.0±1.0 MeV.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01560257