New measurement of b-hadron lifetimes at CDF
A measurement of b-hadron lifetimes in the fully reconstructed decay modes B{sup +} {yields} J/{Psi} K{sup +}, B{sup 0} {yields} J/{Psi} K*{sup 0}, B{sup 0} {yields} J/{Psi} K{sub s}{sup 0}, and {Lambda}{sub b}{sup 0} {yields} J/{Psi} {Lambda}{sup 0} is reported using data corresponding to an integrated luminosity of 4.3 fb{sup -1}, collected by the CDF II detector at the Fermilab Tevatron. The measured values are {tau}(B{sup +}) = 1.639 {+-} 0.009(stat) {+-} 0.009(syst) ps, {tau}(B{sup 0}) = 1.507 {+-} 0.010(stat) {+-} 0.008(syst) ps and {tau}({Lambda}{sub b}{sup 0}) = 1.537 {+-} 0.045(stat) {+-} 0.014(syst) ps. The lifetime ratios are {tau}(B{sup +})/{tau}(B{sup 0}) = 1.088 {+-} 0.009(stat) {+-} 0.004(syst) and {tau}({Lambda}{sub b}{sup 0})/{tau}(B{sup 0}) = 1.020 {+-} 0.030(stat) {+-} 0.008(syst). These are the most precise measurements of these lifetimes and ratios.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL
- Sponsoring Organization:
- DOE Office of Science
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1015391
- Report Number(s):
- FERMILAB-CONF-10-604-PPD
- Journal Information:
- PoS ICHEP2010:198,2010, Journal Name: PoS ICHEP2010:198,2010
- Country of Publication:
- United States
- Language:
- English
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