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View article: Identifying sex similarities and differences in structure and function of the sinoatrial node in the mouse heart
Identifying sex similarities and differences in structure and function of the sinoatrial node in the mouse heart Open
Background The sinoatrial node (SN) generates the heart rate (HR). Its spontaneous activity is regulated by a complex interplay between the modulation by the autonomic nervous system (ANS) and intrinsic factors including ion channels in SN…
View article: Evolution of the ATLAS CREST Conditions DB Project
Evolution of the ATLAS CREST Conditions DB Project Open
The CREST project is a new realization of the conditions DB with the REST API and JSON support for the ATLAS experiment. This project allows to simplify the conditions data structure and to optimize the data access. The CREST development r…
View article: PHYSLITE - A new reduced common data format for ATLAS
PHYSLITE - A new reduced common data format for ATLAS Open
The High Luminosity LHC (HL-LHC) era brings unprecedented computing challenges that call for novel approaches to reduce the amount of real and Monte Carlo-simulated data that is stored, while continuing to support the rich physics program …
View article: Towards a new conditions data infrastructure in ATLAS
Towards a new conditions data infrastructure in ATLAS Open
The ATLAS experiment is preparing a major change in the conditions data infrastructure in view of LHC Run 4. In this paper we describe the ongoing changes in the database architecture which have been implemented for Run 3, and describe the…
View article: Whitepaper submitted to Snowmass21: Advanced accelerator linear collider demonstration facility at intermediate energy
Whitepaper submitted to Snowmass21: Advanced accelerator linear collider demonstration facility at intermediate energy Open
It is widely accepted that the next lepton collider beyond a Higgs factory would require center-of-mass energy of the order of up to 15 TeV. Since, given reasonable space and cost restrictions, conventional accelerator technology reaches i…
View article: Containerization in ATLAS Software Development and Data Production
Containerization in ATLAS Software Development and Data Production Open
The ATLAS experiment’s software production and distribution on the grid benefits from a semi-automated infrastructure that provides up-to-date information about software usability and availability through the CVMFS distribution service for…
View article: An Information Aggregation and Analytics System for ATLAS Frontier
An Information Aggregation and Analytics System for ATLAS Frontier Open
ATLAS event processing requires access to centralized database systems where information about calibrations, detector status and data-taking conditions are stored. This processing is done on more than 150 computing sites on a world-wide co…
View article: Comparison of fragmentation functions for light-quark- and gluon-dominated jets from $pp$ and Pb+Pb collisions in ATLAS
Comparison of fragmentation functions for light-quark- and gluon-dominated jets from $pp$ and Pb+Pb collisions in ATLAS Open
Charged-particle fragmentation functions for jets azimuthally balanced by a high-transverse-momentum, prompt, isolated photon are measured in 25 pb−1 of pp and 0.49 nb−1 of Pb+Pb collision data at 5.02 TeV per nucleon pair recorded with th…
View article: The challenges of mining logging data in ATLAS
The challenges of mining logging data in ATLAS Open
Processing ATLAS event data requires a wide variety of auxiliary information from geometry, trigger, and conditions database systems. This information is used to dictate the course of processing and refine the measurement of particle traje…
View article: Conditions evolution of an experiment in mid-life, without the crisis (in ATLAS)
Conditions evolution of an experiment in mid-life, without the crisis (in ATLAS) Open
The ATLAS experiment is approaching mid-life: the long shutdown period (LS2) between LHC Runs 1 and 2 (ending in 2018) and the future collision data-taking of Runs 3 and 4 (starting in 2021). In advance of LS2, we have been assessing the f…
View article: Understanding the evolution of conditions data access through Frontier for the ATLAS Experiment
Understanding the evolution of conditions data access through Frontier for the ATLAS Experiment Open
The ATLAS Distributed Computing system uses the Frontier system to access the Conditions, Trigger, and Geometry database data stored in the Oracle Offline Database at CERN by means of the HTTP protocol. All ATLAS computing sites use Squid …
View article: A search for $B-L$ $R$-parity-violating top squarks in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS experiment
A search for $B-L$ $R$-parity-violating top squarks in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS experiment Open
A search is presented for the direct pair production of the stop, the supersymmetric partner of the top quark, that decays through an $R$-parity-violating coupling to a final state with two leptons and two jets, at least one of which is id…
View article: Search for heavy long-lived charged $\\mathrm{R}$-hadrons with the ATLAS detector in 3.2 $\\mathrm{fb^{-1}}$ of proton-proton collision data at $\\mathrm{\\sqrt{s} = 13}$ TeV
Search for heavy long-lived charged $\\mathrm{R}$-hadrons with the ATLAS detector in 3.2 $\\mathrm{fb^{-1}}$ of proton-proton collision data at $\\mathrm{\\sqrt{s} = 13}$ TeV Open
A search for heavy long-lived charged $R$-hadrons is reported using a data sample corresponding to 3.2$^{-1}$ of proton--proton collisions at $\\sqrt{s} = 13$ TeV collected by the ATLAS experiment at the Large Hadron Collider at CERN. The …
View article: Measurement of fiducial differential cross sections of gluon-fusion production of Higgs bosons decaying to $WW^*\\rightarrow\\textit{e}\\nu\\mu\\nu$ with the ATLAS detector at $\\sqrt{s}=8$ TeV
Measurement of fiducial differential cross sections of gluon-fusion production of Higgs bosons decaying to $WW^*\\rightarrow\\textit{e}\\nu\\mu\\nu$ with the ATLAS detector at $\\sqrt{s}=8$ TeV Open
This paper describes a measurement of fiducial and differential cross sections of gluon-fusion Higgs boson production in the $H\\rightarrow WW^*\\rightarrow \\textit{e}\\nu\\mu\\nu$ channel, using 20.3 fb$^{-1}$ of proton-proton collision …
View article: A new petabyte-scale data derivation framework for ATLAS
A new petabyte-scale data derivation framework for ATLAS Open
During the Long Shutdown of the LHC, the ATLAS collaboration overhauled its analysis model based on experience gained during Run 1. A significant component of the model is a ``Derivation Framework" that takes the Petabyte-scale AOD output …
View article: Modelling Z → ττ processes in ATLAS with τ-embedded Z → μμ data
Modelling Z → ττ processes in ATLAS with τ-embedded Z → μμ data Open
This paper describes the concept, technical realisation and validation of a largely data-driven method to model events with Zττ decays. In Zμμ events selected from proton-proton collision data recorded at s=8 TeV with the ATLAS experiment …