Projects / Programmes
Experimental Tests of the Electroweak Interaction
| Code |
Science |
Field |
Subfield |
| 1.02.06 |
Natural sciences and mathematics |
Physics |
Experimental physics of elementary particles |
| Code |
Science |
Field |
| P210 |
Natural sciences and mathematics |
Elementary particle physics, quantum field theory |
| P211 |
Natural sciences and mathematics |
High energy interactions, cosmic rays |
elementary particle physics, electroweak interactions, detectors, Ring Imaging Cerenkov counters
Researchers (16)
Organisations (1)
| no. |
Code |
Research organisation |
City |
Registration number |
No. of publicationsNo. of publications |
| 1. |
0106 |
Jožef Stefan Institute |
Ljubljana |
5051606000 |
90,753 |
Abstract
Precision measurements of the key parameters of the standard model are being carried out at the DELPHI and HERA-B spectrometers.The DELPHI spectrometer is taking data at the largest electron positron collider in the world, LEP, operating at European Laboratory for Particle Physics CERN in Geneva. There, electrons and positrons collide at energies between 90 GeV and 190 GeV, producing charged and neutral weak bosons. Weak bosons meditate one of the four elementary forces in nature, the weak force (beside gravitational, electromagnetic and strong force). By analysing particles, arising from the weak boson decays, one can test predictions of the Standard Model, describing the weak, electromagnetic and strong interactions. LEP collider is a perfect environment for studies of electroweak interactions among particles composed of heavy b quarks. At energies above 160 GeV pairs of charged weak bosons are produced in electron positron collisions. Measurements of their mass and production cross-section enable a deeper understanding of elementary laws of nature. Beside this, at the energies never reached before in the electron positron collisions, one can search for experimentally unconfirmed particles, predicted by theories of Supersymmetry.
With the HERA-B spectrometer, currently under preparation at the DESY laboratory in Hamburg, we intend to measure the CP violation in the systemof neutral B mesons, as well as parameters of mixing in the system of neutral B and D systems. The source of B and D mesons are the interactions of protons with a momentum of 920 GeV/c with a wire target in the beam halo. The reaction products are detected by a sophisticated system of silicon and wire chamber based tracking detectors, an electromagnetic calorimeter, and a ring imaging Cerenkov counter (RICH). In the preparation phase of the experiment the main responsibility of our group is preparation and commissioning of the ring imaging Cerenkov counter, which was the subject of an extensive R+D over several years.
