Lifetime is the average time between creation and decay of a particle, which cannot be predicted for an individual particle, so we use the average time. The lifetime is the time when e-1 (or 37%) of them have survived. Derivation of equation
To simplify calculations, we will use only the information in a plane perpendicular (transverse) to the beams, that is, in the x-y plane.
The lifetime of B mesons is
(Do you find the usual formula for p if v is much smaller than c?) |
You can solve this and find
(You will need to use this form when you are using length measured in cm.) |
Run |
Event No. |
B Mass |
ptB |
dt |
Velocity |
Lab Lifetime |
Rest Lifetime |
Bin |
65160 |
642324 |
5.277 |
7.966 |
0.388 |
|
|
|
|
66500 |
89978 |
5.274 |
20.508 |
0.940 |
|
|
|
|
Get the data. - Help with data analysis.
B Lifetime Graph » |