Performance of the missing transverse momentum triggers for the ATLAS detector during Run-2 data taking

0534316 - FZÚ 2021 RIV US eng J - Journal Article
Aad, G. - Abbott, B. - Abbott, D.C. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jačka, Petr - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2940 authors
Performance of the missing transverse momentum triggers for the ATLAS detector during Run-2 data taking.
Journal of High Energy Physics. Roč. 2020, č. 8 (2020), s. 1-53, č. článku 80. ISSN 1029-8479. E-ISSN 1029-8479
R&D Projects: GA MŠMT(CZ) LTT17018
Research Infrastructure: CERN-CZ II - 90104
Institutional support: RVO:68378271
Keywords : ATLAS * CERN * LHC * trigger * hadron
OECD category: Particles and field physics
Impact factor: 5.810, year: 2020
Method of publishing: Open access

The factor of four increase in the LHC luminosity, from 0.5 × 1034^{34}34 cm−2^{−2}−2s−1^{−1}−1 to 2.0 × 1034^{34}34cm−2^{−2}−2s−1^{−1}−1, and the corresponding increase in pile-up collisions during the 2015–2018 data-taking period, presented a challenge for the ATLAS trigger, particularly for those algorithms that select events with missing transverse momentum. The output data rate at fixed threshold typically increases exponentially with the number of pile-up collisions, so the legacy algorithms from previous LHC data-taking periods had to be tuned and new approaches developed to maintain the high trigger efficiency achieved in earlier operations. A study of the trigger performance and comparisons with simulations show that these changes resulted in event selection efficiencies of > 98% for this period, meeting and in some cases exceeding the performance of similar triggers in earlier run periods.

Permanent Link: http://hdl.handle.net/11104/0312537