Angular Analysis of B0->J/ψK* Decays
This webpage summarizes the blessed results for the measurement of the relative amplitudes and phases in the fully reconstructed decay B0->J/ψK*. We obtain a signal yield of 7800 events.
The same angular analysis method exploit for this measurement was also used to analyse Bs->J/ψϕ decays.
A more detailed summary of the results can be found in this public note.
We measure the following mean lifetime in B0->J/ψK* decays:
cτd = 456 +/- 6 (stat) +/- 6 (syst) μm
For the relative decay amplitudes and phases we obtain:
|A0|2 = 0.569 +/- 0.009 (stat) +/- 0.009 (syst)
|A|||2 = 0.211 +/- 0.012 (stat) +/- 0.006 (syst)
δ|| = -2.97 +/- 0.08 (stat) +/- 0.03 (syst)
δ⊥ = 2.97 +/- 0.06 (stat) +/- 0.01 (syst)
Below are all figures meant for download in several file formats.
- Figure 1 (eps),
(png),
(gif),
(jpg): Data/MC comparison of the network output.
- Figure 2 (eps),
(png),
(gif),
(jpg): Invariant mass distrinution.
- Figure 3 (eps),
(png),
(gif),
(jpg): Lifetime distribution.
- Figure 4 (eps),
(png),
(gif),
(jpg): cos(Θ) angular distribution.
- Figure 5 (eps),
(png),
(gif),
(jpg): cos(Ψ) angular distribution.
- Figure 6 (eps),
(png),
(gif),
(jpg): ϕ angular distribution.
- Figure 7 (eps),
(png),
(gif),
(jpg): Sideband subtracted and acceptance corrected cos(Ψ) angular distribution and projection of fit without Kπ S-wave.
- Figure 8 (eps),
(png),
(gif),
(jpg): Sideband subtracted and acceptance corrected cos(Ψ) angular distribution.
- Figure 9 (eps),
(png),
(gif),
(jpg): Sideband subtracted and acceptance corrected cos(Θ) angular distribution.
- Figure 10 (eps),
(png),
(gif),
(jpg): Sideband subtracted and acceptance corrected ϕ angular distribution.
