Akademska digitalna zbirka SLovenije - logo
VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Improving topological cluster reconstruction using calorimeter cell timing in ATLAS [Elektronski vir]
    Aad, Georges ...
    Clusters of topologically connected calorimeter cells around cells with large absolute signal-to-noise ratio (topo-clusters) are the basis for calorimeter signal reconstruction in the ATLAS ... experiment. Topological cell clustering has proven performant in LHC Runs 1 and 2. It is, however, susceptible to out-of-time pile-up of signals from soft collisions outside the 25 ns proton-bunch-crossing window associated with the event’s hard collision. To reduce this effect, a calorimeter-cell timing criterion was added to the signal-to-noise ratio requirement in the clustering algorithm. Multiple versions of this criterion were tested by reconstructing hadronic signals in simulated events and Run 2 ATLAS data. The preferred version is found to reduce the out-of-time pile-up jet multiplicity by for jet GeV and by for jet GeV, while not disrupting the reconstruction of hadronic signals of interest, and improving the jet energy resolution by up to 5% for GeV. Pile-up is also suppressed for other physics objects based on topo-clusters (electrons, photons, -leptons), reducing the overall event size on disk by about in early Run 3 pile-up conditions. Offline reconstruction for Run 3 includes the timing requirement.
    Vir: European physical journal [Elektronski vir]. C, Particles and fields. - ISSN 1434-6052 (Vol. 84, [article no.] 455, Apr. 2024, str. 1-42)
    Vrsta gradiva - e-članek ; neleposlovje za odrasle
    Leto - 2024
    Jezik - angleški
    COBISS.SI-ID - 198692355

    Povezava(-e):

    https://link.springer.com/article/10.1140/epjc/s10052-024-12657-1
    DOI

Vnos na polico