EVE sign of charge or field wrong

ROOT
1

Hello,

I have noticed that particles are bending the wrong way in a uniform magnetic field.
I create TEveTracks using the TParticle constructor, which has PDG code in it.
I have seen this post Locate like command but everyone in the world knows which way an electron should bend in the magnetic field. Shouldn’t this be fixed?

Cheers,
Whit

2

Hi Whit,

Historically, this bug comes from a wrong MF sign in ALICE simulation :slight_smile:

Changing this now would break everybody’s code. Just change the sign of magnetic field when you pass it to Eve.

Cheers,
Matevz

3

Hi Matevz,

Then I would suggest that this mistake be heavily documented, not just on the forums. :laughing:

Cheers,
Whit

4

Hi Whit,

Agreed … and done :slight_smile: I always thought of it as an initiation test :wink:

Cheers,
Matevz