- #1
ChrisVer
Gold Member
- 3,378
- 465
I am always confused when reading about correlation between uncertainties.
I have some basic questions:
1. Can statistical and systematic uncertainties be correlated? [Well they can but I don't understand how this can be interpreted]
2. What are correlations telling us ? obviously a correlation is not giving us any relation [or causation].
3. One example which has confused me:
the transverse momentum of charged particles in ATLAS for example can be measured by looking at the charged particle trajectories within the magnetic field.
The magnetic field's uncertainty [itex]\sigma_B[/itex] is then common for all particles, and this makes their transverse momenta measurement correlated. How does this affect the analyses?
I have some basic questions:
1. Can statistical and systematic uncertainties be correlated? [Well they can but I don't understand how this can be interpreted]
2. What are correlations telling us ? obviously a correlation is not giving us any relation [or causation].
3. One example which has confused me:
the transverse momentum of charged particles in ATLAS for example can be measured by looking at the charged particle trajectories within the magnetic field.
The magnetic field's uncertainty [itex]\sigma_B[/itex] is then common for all particles, and this makes their transverse momenta measurement correlated. How does this affect the analyses?