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Using Puppet to contextualize computing resources for ATLAS analysis on Google Compute Engine
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
2014 (English)In: 20th International Conference on Computing in High Energy and Nuclear Physics (CHEP2013), Parts 1-6, 2014, Vol. 513, 032073- p.Conference paper, Published paper (Refereed)
Abstract [en]

With the advent of commercial as well as institutional and national clouds, new opportunities for on-demand computing resources for the HEP community become available. The new cloud technologies also come with new challenges, and one such is the contextualization of computing resources with regard to requirements of the user and his experiment. In particular on Google's new cloud platform Google Compute Engine (GCE) upload of user's virtual machine images is not possible. This precludes application of ready to use technologies like CernVM and forces users to build and contextualize their own VM images from scratch. We investigate the use of Puppet to facilitate contextualization of cloud resources on GCE, with particular regard to ease of configuration and dynamic resource scaling.

Place, publisher, year, edition, pages
2014. Vol. 513, 032073- p.
Series
Journal of Physics Conference Series, ISSN 1742-6588 ; 513
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-235859DOI: 10.1088/1742-6596/513/3/032073ISI: 000342287200154OAI: oai:DiVA.org:uu-235859DiVA: diva2:762647
Conference
20th International Conference on Computing in High Energy and Nuclear Physics (CHEP), OCT 14-18, 2013, Amsterdam, NETHERLANDS
Note

Group Author(s): ATLAS Collaboration

Available from: 2014-11-12 Created: 2014-11-11 Last updated: 2016-10-03Bibliographically approved
In thesis
1. Searches for Higgs bosons with hadronically decaying τ-leptons: Using Grid and Cloud computing techniques
Open this publication in new window or tab >>Searches for Higgs bosons with hadronically decaying τ-leptons: Using Grid and Cloud computing techniques
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis describes a measurement of the Standard Model Higgs boson coupling to fermions in decays to two τ-leptons, a search for charged Higgs bosons in decays to a τ-lepton and a neutrino, as well as the reconstruction, identification and triggering of hadronically decaying τ-leptons. The data considered are collected by the ATLAS experiment at the Large Hadron Collider.

The reconstruction and identification of hadronically decaying τ-leptons in the ATLAS experiment during Run 2 of the Large Hadron Collider are described, and the performance of the τ trigger is measured in events with top–antitop-quark pairs using data from 13 TeV proton–proton collisions, corresponding to an integrated luminosity of 3.2 fb-1, collected in 2015, and 11.5 fb-1, collected in 2016.

Hadronically decaying τ-leptons are of importance to many physical processes involving Higgs bosons. The coupling of the Standard Model Higgs boson to fermions is measured in decays to two τ-leptons using 7 TeV data corresponding to an integrated luminosity of 4.5 fb-1, collected in 2011, and 8 TeV data corresponding to an integrated luminosity of 20.3 fb-1, collected in 2012. The signal strength is measured to be μ = 1.4, corresponding to an excess over the background-only model of 4.5σ.

Charged Higgs bosons are searched for in decays to a τ-lepton and a neutrino, where the τ-lepton decays hadronically. 13 TeV data corresponding to an integrated luminosity of 14.7 fb-1, collected in 2015 and 2016, are used. No excess over the Standard Model background is observed, and the 95 % confidence-level exclusion limits on σ(pp → [b]tH+) × (H+ → τν) are set to 2.0 pb–8 fb in the range 200–2000 GeV.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2016. 111 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1434
Keyword
LHC, ATLAS, Higgs, Charged Higgs, Tau lepton, 2HDM, MSSM
National Category
Subatomic Physics
Research subject
Physics with specialization in Elementary Particle Physics
Identifiers
urn:nbn:se:uu:diva-304291 (URN)978-91-554-9706-4 (ISBN)
Public defence
2016-11-21, Polhemsalen, 10134, Ångströmlaboratoriet, Lägerhyddsvägen 1, Uppsala, 13:00 (English)
Opponent
Supervisors
Available from: 2016-10-31 Created: 2016-10-03 Last updated: 2016-11-17

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Öhman, Henrik

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