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standard particles phi1020 fix

Miroslav Saur requested to merge msaur_standard_particles_phi1020_fix into master

Current definition of phi1020 combiner in standard particles is highly inefficient and causing problems in various tests due to creating too many combinations.

This MR aims to retune phi1020 selection in order to return only a reasonably valid phi1020.

Newly applied cuts:

KAON:
F.P > 2500 * MeV,
F.PT > 250 * MeV,
F.PIDk > -5

PHI:
F.MASS < 1060. * MeV,
F.SUM(F.PT) > 500 * MeV (based on min PT of kaons)
F.DOCA(1, 2) < 0.3 * mm

Additionally a std_ prefix was applied to all ParticleCombiner in standard_particles.

Resolves #647 (closed)

#667

Edited by Miroslav Saur

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