Fast b-tagging at the high-level trigger of the ATLAS experiment in LHC Run 3

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476413" target="_blank" >RIV/00216208:11320/23:10476413 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/23:00583128 RIV/68407700:21220/23:00373798 RIV/68407700:21340/23:00373798 RIV/68407700:21670/23:00373798 RIV/61989592:15310/23:73628928
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=WXOee0EXxY" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=WXOee0EXxY</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1748-0221/18/11/P11006" target="_blank" >10.1088/1748-0221/18/11/P11006</a>

Result language
angličtina
Original language name
Fast b-tagging at the high-level trigger of the ATLAS experiment in LHC Run 3
Original language description
The ATLAS experiment relies on real-time hadronic jet reconstruction and ????-tagging to record fully hadronic events containing ????-jets. These algorithms require track reconstruction, whichis computationally expensive and could overwhelm the high-level-trigger farm, even at the reducedevent rate that passes the ATLAS first stage hardware-based trigger. In LHC Run 3, ATLAS hasmitigated these computational demands by introducing a fast neural-network-based ????-tagger, whichacts as a low-precision filter using input from hadronic jets and tracks. It runs after a hardware triggerand before the remaining high-level-trigger reconstruction. This design relies on the negligiblecost of neural-network inference as compared to track reconstruction, and the cost reduction fromlimiting tracking to specific regions of the detector. In the case of Standard Model ???????? RIGHTWARDS ARROW ????-????????-????, a key signature relying on ????-jet triggers, the filter lowers the input rate to the remaining high-level trigger by a factor of five at the small cost of reducing the overall signal efficiency by roughly 2%.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10300 - Physical sciences

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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