Lit: Remove Bremsstrahlung energy loss for electrons and replace with existing Bethe Bloch for electrons #3019

• The Lit extrapolator was using Bremsstrahlung for the energy loss calculation in case of electrons, which resulted in wrong momentum updates and therefore wrong extrapolations (see issue #3019)
• Replaced with BetheBloch energy loss specialized for electrons/positrons which was already implemented, the energy loss depends on charge which needs to be checked since such charge dependent asymmetry is not observed in geant3. Also is is to large by a factor of 2 when comparing with geant3.
• Other extrapolations by the LitExtrapolator were correct, since muon or pion particle hypothesis are used, where the energy loss is not calculated via Bremsstrahlung (full bethe bloch instead)

changed milestone to %OCT23

added Reconstruction label

requested review from @se.gorbunov

changed the description

Dear @s.lebedev, @andrey.lebedev,

you have been identified as code owner of at least one file which was changed with this merge request.

Please check the changes and approve them or request changes.

added CodeOwners label

@ma.beyer,

1. Florian asked us to separate the code formatting from the code changes. It makes sense to split your commit into two: the first one with the clang format and the second one with the code changes. Or vise versa.

2. Why is it marked as Draft? Are you waiting for a review from Semen? For me, it looks fine, so I'll make him a reviewer.

assigned to @se.gorbunov

approved this merge request

requested review from @s.lebedev and removed review request for @se.gorbunov

requested review from @se.gorbunov and removed review request for @s.lebedev

resolved all threads

added 3 commits

• bed4e266 - 1 commit from branch computing:master
• 88f400ac - Lit: replace bremsstrahlung energy loss with bethe bloch for electrons
• 8c96fcdb - clang format

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marked this merge request as ready

resolved all threads

merged