Projects / Programmes
| Code |
Science |
Field |
Subfield |
| 1.02.00 |
Natural sciences and mathematics |
Physics |
|
| Code |
Science |
Field |
| P210 |
Natural sciences and mathematics |
Elementary particle physics, quantum field theory |
elementary particles, hadron colliders, CDF, Tevatron, ATLAS, LHC, W bosons, electroweak interaction, Standard Model
Researchers (1)
| no. |
Code |
Name and surname |
Research area |
Role |
Period |
No. of publicationsNo. of publications |
| 1. |
22457 |
PhD Ilija Bizjak |
Physics |
Head |
2007 - 2008 |
340 |
Organisations (1)
| no. |
Code |
Research organisation |
City |
Registration number |
No. of publicationsNo. of publications |
| 1. |
0106 |
Jožef Stefan Institute |
Ljubljana |
5051606000 |
90,753 |
Abstract
The ATLAS experiment, starting in 2007 at the Large Hadron Collider (LHC), will explore the properties of elementary particles and their interactions. The aim of this project is to collect useful tools and gain understanding of performing measurements on hadron colliders by participating in the analyses on the running CDF experiment at the Tevatron hadron collider, and use them to analyze future data of the ATLAS experiment. As a part of this project we will develop a fast Monte Carlo simulation of W boson decays and measure W boson properties using the CDF detector. The Monte Carlo simulation will then be adapted for use at the ATLAS experiment. The experience with the analysis of W decays will be put to use in the preparations for the measurement of the WW→WW elastic scattering cross-section with the ATLAS detector.
Significance for science
Understanding of the electroweak symmetry breaking and the discovery of the associated Higgs boson are among the most important tasks of the elementary particle physics today. The measurement of the W boson mass is used to constrain the possible mass range of the Higgs boson, and in combination with other precision measurements of the electroweak interaction properties tests the internal consistency of the standard model of elementary particles. The presented measurement of the W boson mass exceeds in accuracy the combined accuracy of all previous measurements of this quantity. Since the precision measurements of the W boson decay width and mass require a well calibrated detector and a detailed simulation of all relevant processes in the detector, the detectors at LHC will not be able to improve these measurements in the near future.
The system for distributing and logging the measured data at the CDF detector with its data bandwidth of 20 MB/s was limiting the data-taking process. We have upgraded the system to a modular design that can currently accommodate for data transfers of up to 80 MB/s and can be increased by adding more modules.
Significance for the country
Elementary particle physics research brings both increased understanding of nature's first principles and the knowledge and tools needed for the development of the society and the achievement of its goals. The experimental research uses the most advanced devices ever built and the development and operation of the experiments is performed by large international collaborations of scientists. The integration of Slovenian scientists into large collaborations such as CDF or ATLAS gives access to leading technologies and large data sets which are key to successful research at research institutions. The project is the only slovenian involvement in the CDF experiment and transfers the knowledge from a running experiment to that of ATLAS, which is one of the most important particle physics experiments of the next decade. The Slovenian involvement enables the transfer of knowledge into Slovenia; the collaboration in the development of modern technology stimulates new ideas, which will improve the relevance and the competitiveness of the Slovenian research centres. The attained knowledge is also avalable to the generations of future slovene physics through dedicated lectures.
Most important scientific results
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Most important socioeconomically and culturally relevant results
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