Dortmund 2021 – scientific programme
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T: Fachverband Teilchenphysik
T 41: DAQ, trigger and electronics II
T 41.4: Talk
Tuesday, March 16, 2021, 16:45–17:00, Tp
b-jet triggers in ATLAS Run-3 — •Christian Nass1, Tatjana Lenz1, Jochen Dingfelder1, and Carlo Schiavi2 — 1Physikalisches Institut, Universität Bonn, Germany — 2Dipartimento di Fisica, Università di Genova, Genova, Italy
In high energy particle physics b-quarks play an important role for numerous reasons, e.g. 3rd generation particle, long lifetime, large couplings to top-quark and Higgs Boson. The latter point is crucial for many top-quark and Higgs analyses. Some of these analysis like HH → bbbb, ttH or bH → bbb have fully hadronic final states. The challenge is to select these events out of the overwhelming QCD background. Since not all events can be recorded, this has to be done in real-time. Therefore a lot of effort has been put in developing algorithms to discriminate b-quark initiated jets from c-quark, light-quark and gluon initiated jets by utilising the b-quark properties. These algorithms form the b-jet triggers and have to be fast and efficient in order to keep the pT-threshold as low as possible.
This talk will present the b-jet trigger code structure for ATLAS in Run-3 as well as its validation.