# ATLAS Notes

2020-01-28
12:55
 Search for exotic states in ATLAS: pentaquarks / Yeletskikh, Ivan (Joint Institute for Nuclear Research) A study of $J/\psi p$ resonances in the $\Lambda_b \rightarrow J/\psi p K$ decays with large $m(p K^-)$ invariant masses by the ATLAS experiment at the LHC is presented. [...] ATL-PHYS-PROC-2020-007. - 2020. - 16 p. Original Communication (restricted to ATLAS) - Full text

2020-01-28
10:11
 ATLAS LAr Calorimeter Performance in LHC Run 2 / ATLAS LAr Collaboration ; Spalla, Margherita (Max-Planck-Institut fuer Physik) - Presenter, on behalf of LAr Group Liquid argon (LAr) sampling calorimeters are employed by ATLAS for all electromagnetic calorimetry in the pseudo-rapidity region $|\eta| < 3.2$, and for hadronic and forward calorimetry in the region $1.5 < |\eta| < 4.9$. [...] ATL-LARG-PROC-2020-001. - 2020. - 6 p. Original Communication (restricted to ATLAS) - Full text

2020-01-27
15:30
 The ATLAS Level-1 Topological Processor: experience and upgrade plans / Moreno Martinez, Carlos (Institut de Fisica d'Altes Energies (IFAE), Barcelona Institute of Science and Technology, Barcelona, Spain) During Run-2 the Large Hadron Collider has provided, at the World’s energy frontier, proton-proton collisions to the ATLAS experiment with high instantaneous luminosity (up to 2.1 x 10^34cm^−2s^−1), placing stringent operational and physical requirements on the ATLAS trigger system in order to reduce the 40 MHz collision rate to a manageable event storage rate of 1 kHz, while not rejecting interesting collisions. [...] ATL-DAQ-PROC-2020-003. - 2020. - 10 p. Original Communication (restricted to ATLAS) - Full text

2020-01-27
10:56
 ATLAS job submission system for Salomon HPC based on ARC-CE / Svatos, Michal (Institute of Physics of the Czech Academy of Sciences) ; Chudoba, Jiri (Institute of Physics of the Czech Academy of Sciences) ; Vokac, Petr (Czech Technical University in Prague) The ATLAS experiment at CERN is using HPCs opportunistically to extend its computing capacity for years. [...] ATL-SOFT-PROC-2020-001. - 2020. - 12 p. Original Communication (restricted to ATLAS) - Full text

2020-01-24
21:42
 Review of the 13 TeV ATLAS Open Data release The ATLAS Collaboration is releasing a new set of proton-proton collision data to the public for educational purposes. [...] ATL-OREACH-PUB-2020-001. - 2020. - 28 p. Original Communication (restricted to ATLAS) - Full text

2020-01-24
19:06
 Heavy Flavour production in ATLAS: Charmonium production in p-p at 13 TeV and in Pb-Pb collsions. Associated charmonium and vector bosons production. / Abbott, Brad (University of Oklahoma) Five results are presented for charmonium production in $pp$, $p-Pb$ and $Pb-Pb$ collisions. [...] ATL-PHYS-PROC-2020-006. - 2020. - 13 p. Original Communication (restricted to ATLAS) - Full text

2020-01-21
21:23
 FELIX: The New Readout System for the ATLAS Detector / Trovato, Marco (Argonne National Laboratory) After the current LHC shutdown (2019-2021), the ATLAS experiment at the LHC at CERN will be required to operate in an increasingly harsh collision environment. [...] ATL-DAQ-PROC-2020-002. - 2020. - 3 p. Original Communication (restricted to ATLAS) - Full text

2020-01-15
13:41
 Single- and and double-differential cross-sections in ttbar final states in the lepton+jets channel / Kvita, Jiri (Palacky University, RCPTM) We present measurements of single- and double-differential cross-sections in ttbar final states in the lepton+jets channel, unfolded to particle and parton levels with both resolved and boosted topologies considered. [...] ATL-PHYS-PROC-2020-005. - 2020. - 5 p. Original Communication (restricted to ATLAS) - Full text

2020-01-15
13:40
 Overview of Recent Results from ATLAS / Wiglesworth, Craig (Niels Bohr Institute (NBI), University of Copenhagen) This paper presents an overview of recent results from the ATLAS Experiment at the CERN Large Hadron Collider, with a particular focus on those that are based on the entire Run 2 dataset of $\sqrt{s}$=13~TeV proton-proton collisions. [...] ATL-PHYS-PROC-2020-004. - 2020. - 8 p. Original Communication (restricted to ATLAS) - Full text

2020-01-12
09:30
 Simultaneous Jet Energy and Mass Calibrations with Neural Networks The jet mass is one of the most important observables for identifying boosted, hadronically decaying, massive particles. [...] ATL-PHYS-PUB-2020-001. - 2020. Original Communication (restricted to ATLAS) - Full text