Measurement of the $B^0_{s}$ lifetime and study of $B^0_{s} - \bar{B}^0_s$ oscillations using $D_s \ell$ events

Lifetime and oscillations of B0s mesons have been studied in events with a large transverse momentum lepton and a Ds of opposite electric charge in the same hemisphere, selected from about 3.6 million hadronic Z0 decays accumulated by DELPHI between 1992 and 1995. The B0s lifetime and the fractional width difference between the two physical B0s states have been found to be: \tau_(B0s) = (1.42^{+0.14}_{-0.13}(stat.) +/- 0.03(syst.)) ps \Delta\Gamma(B0s)/\Gamma(B0s) < 0.46 at the 95% C.L. In the latter result it has been assumed that \tau_(B0s)=\tau_(B0d). Using the same sample, a limit on the mass difference between the physical B0s states has been set: Delta(m_B0s) > 7.4 ps^{-1} at the 95% C.L. with a corresponding sensitivity equal to 8.1 ps^{-1}.

Note:

47 pages, 15 figures Report-no: CERN-EP-2000-043 Journal-ref: Eur. Phys. J. C 16 (2000) 555-578

electron positron: colliding beams
electron positron: annihilation
Z0: electroproduction
Z0: hadronic decay
bottom: pair production
B/s0: semileptonic decay
lepton: charge
transverse momentum: high
D/s: charge
D/s: hadronic decay

References(0)

Figures(0)

Loading ...

Measurement of the Bs0B^0_{s}Bs0​ lifetime and study of Bs0−Bˉs0B^0_{s} - \bar{B}^0_sBs0​−Bˉs0​ oscillations using DsℓD_s \ellDs​ℓ events

Citations per year

Measurement of the $B^0_{s}$ lifetime and study of $B^0_{s} - \bar{B}^0_s$ oscillations using $D_s \ell$ events