* B oscillations

The oscillations can be smeared:
+ convoluted with the [[id:9dfdc23e-f9ce-413b-b950-fc20fd152e42][acceptance function]]
+ further enhanced by detector resolution effects (e.g. time resn).


* Acceptance
  :PROPERTIES:
  :ID:       9dfdc23e-f9ce-413b-b950-fc20fd152e42
  :END:

In LHCb acceptance is a function of (proper?) time (B decay time / B
decay length / PV-SV distance). Combined effect of,
+ non-uniform geometrical acceptance (as LHCb is not hermetic)
+ and triggering on a min. time interval (or displacement) from IP/PV.
  Ensures a long lived B.