CP-conserving and CP-violating properties in semileptonic Bs decays with the D0 experiment
A search for CP violation has been performed in a sample of semileptonic B{sub s} decays corresponding to approximately 5 fb{sup -1} of data collected by the D0 detector in Run II at the Fermilab Tevatron collider. A time-dependent fit to the distributions of B{sub s} candidates yields the flavor-specific asymmetry as a{sub fs}{sup s} = [-1.7 {+-} 9.1(stat){sub -2.3}{sup +1.2}(syst)] x 10{sup -3}, corresponding to the most precise measurement to date for this CP violation parameter. Furthermore a search for the semi-inclusive process B{sub s} to D{sub s}{sup (*)}D{sub s}{sup (*)} has been performed on a data sample of 2.8 fb{sup -1}. 26.6 {+-} 8.4 signal events are observed with a significance of 3.2 standard deviations above background, leading to a branching ratio of 0.035 {+-} 0.010(stat) {+-} 0.011(syst). Under certain theoretical assumptions, these double-charm final states saturate CP-even eigenstates in the B{sub s} decays, resulting in a width difference of {Delta}{Lambda}{sub s}{sup CP}/{Lambda}{sub s} = 0.072 {+-} 0.021(stat) {+-} 0.022(syst).
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 964433
- Report Number(s):
- FERMILAB-CONF-09-395-E; arXiv eprint number arXiv:0908.2233; TRN: US0903486
- Country of Publication:
- United States
- Language:
- English
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