High Performance Computing Physics

Description

The main goal of this project is to provide excellent research in the field of high-energy particle physics, paving the road for new discoveries about the fundamental nature of the Universe. It is based on the interrelated subjects of developing the necessary tools and calculations for the new frontier in particle physics; setting up the appropriate framework for the discoveries expected from the forthcoming experimental endeavors, notably at the LHC; and analysing the LHC data to search for evidences of new physics and for measurements of cross sections of Standard Model quantities with improved precision.

An underlying theme is the use of high-performance and large-scale computing in all aspects of the project (high performance computing physics). This is a feature of modern particle physics: the complexity of the theoretical and experimental problems places a considerable demand on the computing environment. We need to develop sophisticated algebraic codes, advanced numerical methods and simulations, and tools for the analysis of massive amounts of experimental data.

By taking advantage of the multidisciplinary potential of the project and of the complementary expertise of all partners involved, we have crystallised our research objectives into three work packages. These work packages will be at the very core of collider phenomenology throughout the LHC era.

Work Packages

  • WP1: Extreme Computation Tools
  • WP2: Search for the Higgs Boson and for New Physics at the LHC
  • WP3: Parallel and Distributed Computing

Partners

  • Computer Science Dept., University of Torino
  • Experimental Physics Dept., University of Torino
  • Theoretical Physics Dept., University of Torino

Participants

  • Dr. AMAPANE Nicola (Principal Investigator, Experimental Physics Dept., University of Torino)
  • Prof. MIGLIORE Ernesto (Experimental Physics Dept., University of Torino)
  • Prof. COSTA Marco (Experimental Physics Dept., University of Torino)
  • Prof. PASSARINO Giampiero (Theoretical Physics Dept., University of Torino)
  • Prof. GAMBINO Paolo (Theoretical Physics Dept., University of Torino)
  • Prof. MAGNEA Lorenzo (Theoretical Physics Dept., University of Torino)
  • Prof. MAINA Ezio (Theoretical Physics Dept., University of Torino)

Researchers

  • MUSICH Marco, PhD (Istituto Nazionale di Fisica, Torino)
  • PELLICCIONI Mario, PhD (Istituto Nazionale di Fisica, Torino)
  • MARIOTTI Chiara, PhD (Istituto Nazionale di Fisica, Torino)
  • STAIANO Amedeo, PhD (Istituto Nazionale di Fisica, Torino)

Events

The workshop will be focused on the discovery of the new boson at LHC and on the current theoretical implications. A general presentation on the importance and the meaning of the last piece of the Standard Model will introduce the discovery. This workshop intends to bring theorists and experimentalists together to make the point on the new data coming from 2012 LHC run and discuss the future perspectives. University authorities have been invited to attend the workshop.

Papers

Results are presented from searches for the standard model Higgs boson in proton–proton collisions at View the MathML source and 8 TeV in the Compact Muon Solenoid experiment at the LHC, using data samples corresponding to integrated luminosities of up to 5.1 fb−1 at 7 TeV and 5.3 fb−1 at 8 TeV. The search is performed in five decay modes: γγ, ZZ, W+W,τ+τ-, and View the MathML source. An excess of events is observed above the expected background, with a local significance of 5.0 standard deviations, at a mass near 125 GeV, signalling the production of a new particle. The expected significance for a standard model Higgs boson of that mass is 5.8 standard deviations. The excess is most significant in the two decay modes with the best mass resolution, γγ and ZZ; a fit to these signals gives a mass of 125.3±0.4(stat.)±0.5(syst.) GeV. The decay to two photons indicates that the new particle is a boson with spin different from one.