scholarly journals Muon reconstruction efficiency and momentum resolution of the ATLAS experiment in proton–proton collisions at $$\sqrt{s}=7$$ s = 7  TeV in 2010

2014 ◽  
Vol 74 (9) ◽  
Author(s):  
G. Aad ◽  
◽  
T. Abajyan ◽  
B. Abbott ◽  
J. Abdallah ◽  
...  
Keyword(s):  
Proton Proton ◽  
Proton Collisions ◽  
Atlas Experiment ◽  
Momentum Resolution ◽  
Reconstruction Efficiency ◽  
Proton Proton Collisions

scholarly journals Muon reconstruction performance of the ATLAS detector in 2016

2018 ◽  
Vol 182 ◽  
pp. 03008
Author(s):  
Luigi Marchese
Keyword(s):  
Atlas Detector ◽  
Proton Proton ◽  
Proton Collisions ◽  
Reconstruction Performance ◽  
Z Decays ◽  
The Status ◽  
Momentum Resolution ◽  
Reconstruction Efficiency ◽  
Proton Proton Collisions

Muons are of key importance to study some of the most interesting physics topics at the LHC. We show the status of the performance of the muon reconstruction in the analysis of proton-proton collisions at the LHC, recorded by the ATLAS detector in 2016. Reconstruction efficiency and momentum resolution have been measured using J/Ψ and Z decays for different classes of reconstructed muons.

scholarly journals Timepix3 Luminosity Determination of 13 TeV Proton-Proton Collisions at the ATLAS Experiment

2020 ◽  
Vol 225 ◽  
pp. 01002
Author(s):  
Andreé Sopczak
Keyword(s):  
Simple Model ◽  
Number Of Clusters ◽  
Proton Proton ◽  
Proton Collisions ◽  
Atlas Experiment ◽  
Long Term Stability ◽  
Counting Methods ◽  
Proton Proton Collisions

Medipix and Timepix devices, installed in the ATLAS cavern at the LHC, have provided valuable complementary luminosity information. Results are presented from measurements with Timepix3 (TPX3) detectors. In contrast with previously employed frame-based data acquisition, the TPX3 detector remains active continuously, sending information on pixel hits as they occur. Hit- and cluster-counting methods were used for the luminosity determination of the LHC protonproton collisions. The LHC luminosity versus time is determined using these two methods and fitted to a simple model, which incorporates luminosity reduction from single bunch and beam-beam interactions. The precision of the luminosity determination could be improved by counting the number of clusters, instead of just pixel hits. The internal precision and long-term stability of the TPX3 luminosity measurement are below 0.5%. TPX3, owing to its 1.56 ns time-tagging, is able to resolve the time structure of the luminosity due to the collisions of individual proton bunches when integrated over an LHC fill.

scholarly journals The ATLAS Data Carousel Project Status

2021 ◽  
Vol 251 ◽  
pp. 02006
Author(s):  
Mikhail Borodin ◽  
Alessandro Di Girolamo ◽  
Edward Karavakis ◽  
Alexei Klimentov ◽  
Tatiana Korchuganova ◽  
...  
Keyword(s):  
State Of The Art ◽  
Storage System ◽  
Workflow Management ◽  
Scientific Data ◽  
Current Status ◽  
Proton Proton ◽  
Proton Collisions ◽  
Atlas Experiment ◽  
Tenfold Increase ◽  
Proton Proton Collisions

The High Luminosity upgrade to the LHC, which aims for a tenfold increase in the luminosity of proton-proton collisions at an energy of 14 TeV, is expected to start operation in 2028/29 and will deliver an unprecedented volume of scientific data at the multi-exabyte scale. This amount of data has to be stored, and the corresponding storage system must ensure fast and reliable data delivery for processing by scientific groups distributed all over the world. The present LHC computing and data management model will not be able to provide the required infrastructure growth, even taking into account the expected hardware technology evolution. To address this challenge, the Data Carousel R&D project was launched by the ATLAS experiment in the fall of 2018. State-of-the-art data and workflow management technologies are under active development, and their current status is presented here.

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