Projects / Programmes source: ARIS

Experimental Particle Physics

Research activity

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 

Code Science Field
1.03  Natural Sciences  Physical sciences 
experimental particle physics, CERN, KEK, LHC, Super KEKB, ATLAS, Belle II, leptons, quarks, interactions, symmetries, Standard model, Higgs boson, New Physics, exotics, heavy flavour, CP violation, particle detectors, Grid computing, medical imaging
Evaluation (rules)
source: COBISS
Researchers (43)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  34428  PhD Jyoti Prakash Biswal  Physics  Researcher  2015 - 2017  152 
2.  15641  PhD Marko Bračko  Physics  Researcher  2015 - 2021  833 
3.  09081  PhD Vladimir Cindro  Physics  Researcher  2015 - 2021  1,655 
4.  39132  PhD Dania Consuegra Rodriguez  Physics  Junior researcher  2017 - 2021 
5.  15716  Jurij Eržen    Technical associate  2015 - 2021 
6.  12092  PhD Boštjan Golob  Physics  Researcher  2015 - 2021  783 
7.  18277  PhD Andrej Gorišek  Physics  Researcher  2015 - 2021  1,417 
8.  38197  PhD Bojan Hiti  Physics  Researcher  2015 - 2021  613 
9.  53540  Alissa Shirley Howard  Physics  Junior researcher  2019 - 2021  153 
10.  36331  Luka Kanjir  Physics  Junior researcher  2015 - 2017  213 
11.  18278  PhD Borut Paul Kerševan  Physics  Researcher  2015 - 2021  1,412 
12.  11598  PhD Samo Korpar  Physics  Researcher  2015 - 2021  863 
13.  15642  PhD Gregor Kramberger  Physics  Researcher  2015 - 2021  1,570 
14.  08725  PhD Peter Križan  Physics  Researcher  2015 - 2021  1,052 
15.  53457  PhD Blaž Leban  Physics  Junior researcher  2019 - 2021  216 
16.  27794  Dejan Lesjak    Technical associate  2015 - 2021 
17.  53458  Andrej Lozar  Physics  Junior researcher  2019 - 2021  29 
18.  37476  PhD Matic Lubej  Physics  Junior researcher  2015 - 2018  60 
19.  28481  PhD Boštjan Maček  Physics  Researcher  2015 - 2021  1,038 
20.  55790  Miha Mali  Physics  Junior researcher  2021 
21.  12313  PhD Igor Mandić  Physics  Researcher  2015 - 2021  1,553 
22.  04361  Erik Margan    Technical associate  2015 - 2021  35 
23.  56032  Jakob Merljak    Researcher  2021 
24.  04763  PhD Marko Mikuž  Physics  Head  2015 - 2021  1,703 
25.  37478  PhD Manca Mrvar  Physics  Junior researcher  2015 - 2018  89 
26.  37479  PhD Miha Muškinja  Physics  Junior researcher  2015 - 2018  698 
27.  36339  PhD Tara Nanut  Physics  Researcher  2015 - 2017  98 
28.  52056  Jakob Novak  Physics  Junior researcher  2018 - 2021  293 
29.  39148  PhD Tadej Novak  Physics  Junior researcher  2016 - 2020  440 
30.  16354  PhD Rok Pestotnik  Physics  Researcher  2015 - 2021  749 
31.  30884  PhD Marko Petrič  Physics  Researcher  2018  189 
32.  11775  PhD Tomaž Podobnik  Physics  Researcher  2015 - 2021  425 
33.  50507  Leonardo B. Rizzuto  Physics  Junior researcher  2017 - 2021  16 
34.  33990  PhD Andrej Seljak  Physics  Researcher  2020 - 2021  52 
35.  54707  Luka Senekovič  Physics  Junior researcher  2020 - 2021 
36.  36349  Grygorii Sokhrannyi  Physics  Junior researcher  2015 - 2017  358 
37.  03947  PhD Marko Starič  Physics  Researcher  2015 - 2021  786 
38.  21552  PhD Andrej Studen  Physics  Researcher  2015  134 
39.  32169  PhD Luka Šantelj  Physics  Researcher  2018 - 2021  315 
40.  35482  Tina Šfiligoj  Physics  Junior researcher  2015 - 2018  520 
41.  34454  PhD Elvedin Tahirović  Physics  Junior researcher  2015 - 2016  12 
42.  25620  PhD Anže Zupanc  Physics  Researcher  2015 - 2018  349 
43.  12750  PhD Dejan Žontar  Physics  Researcher  2015 - 2021  351 
Organisations (3)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0106  Jožef Stefan Institute  Ljubljana  5051606000  92,005 
2.  0794  University of Maribor, Faculty of Chemistry and Chemical Engineering  Maribor  5089638012  13,201 
3.  1554  University of Ljubljana, Faculty of Mathematics and Physics  Ljubljana  1627007  34,558 
The research programme represents the only activity in the field of experimental particle physics in Slovenia. The research is carried out through participation in two major experiments at the energy and intensity frontier: ATLAS at LHC in CERN and the upcoming Belle II at Super KEKB in KEK. The group holds major responsibilities in all experimental aspects from detector R&D, construction, commissioning and operation, computing, and physics analysis of the data, in both collaborations. Based on successes in the previous programme period, the proposed research focuses on exploitation of increased energy and luminosity with ATLAS at LHC, and the large statistics of e+e- collisions with Belle II at Super KEKB. The quest thus continues for signals of physics beyond the Standard Model. Constant upgrades are required for both detectors as well as for the computing infrastructure of the Tier-2 centre in Ljubljana. Participating in several R&D endeavours we are pushing detector technology beyond current limitations. Applications to medicine offer improved detection methods in nuclear imaging.
Significance for science
The proposed research programme represents a challenging task at the very frontier of contemporary scientific endeavour, utilizing vast human and financial resources and stretching or even extending existing technologies to render the experiments possible. The proposed experiments have both been heavily scrutinized, approved, and now followed up by research committees, composed of leading experts from the field and beyond. They represent a joint effort of the global scientific community, and are constantly monitored by scientists as well as by the authorities that are funding them. Their task is to deepen our insight into constituents of matter and the forces acting between them. In this quest accelerators of highest energies or with special properties are used, to probe high energy densities as they existed a glimpse after the Big Bang that created the Universe. The Standard model of electroweak and strong interactions is one of the most celebrated theories of our time, a theory that will be probed to and hopefully beyond its limits by the experiments proposed in this research programme. These experiments have, each in their own, complimentary way, a good chance of finding signatures of physics beyond the Standard model, be it the predicted and long awaited supersymmety or some more exotic realization of physics at a larger energy scale. One of important unsolved questions of contemporary science is why we live in a universe in which the matter (particles) completely dominates over the antimatter (antiparticles). Already in 1967 the Russian physicist A. Saharov suggested three necessary conditions for such an asymmetric universe evolution. One of those is the violation of the CP symmetry, which can be measured in the world of subatomic particles. Another condition, the violation of the baryon number conservation, also belongs to that area of research. Measurements with the Belle detector in the past period of this research programme offered very precise determinations of the CP violation in the system of B mesons and represent another achieved milestone in the field. However, the measured values of the Cabbibo-Kobayashi-Maskawa matrix elements which within the SM parameterize the CP violation show that the observed magnitude of violation is significantly too small to describe the asymmetric universe. Unknown sources of the CP violation must exist, related to new particles and processes, commonly grouped under the term New Physics. A discovery of those may bring an answer to the question of the universe asymmetry as observed nowadays. The measurements at both, the energy and intensity frontier, posses also a more widespread importance. If existing, the New Physics processes would cause a large change in understanding the structure of the world we live in. Consider for example the supersymmetric extensions of the SM, based on string theories. One can draw similarities in the impact that a possible experimental evidence for these models would have to the one of the relativistic theory. As the latter changed the reasoning about the world by introducing a time dimension as an equivalent to the three spatial dimensions, also the supersymmetric theories would introduce ten spatial dimensions instead of only three (additional dimensions would not be infinite as is the case with the familiar ones but rather shrunk to the sizes many orders of magnitude smaller than the size of the hadrons). While the LHC collider could enable experimental evidence for the existence of new particles (confirming the qualitative correctness of many beyond the SM theories) the precision measurements to be performed with the Belle-II detector will differentiate among these models and by that enable determination of the so far unknown particle properties.
Significance for the country
Participation of Slovenian science in big collaborative international projects, exploring the frontiers of science, is of vital importance for the development of Slovenia. Carrying out research under equal terms with their colleagues from all over the world enables Slovenia and its researchers to: - participate in top research projects in one of the most propulsive fields of science, - publish in the most renowned scientific journals and take part in top-class international conferences, - ease formation of young researchers in international collaboration and competition with their fellow scientists from all around the world, - transfer research knowledge and experience into education at university and post-graduate level, - access and provide hands-on experience with the ultimate technology in the fields of detectors, electronics and computing, - transfer the applied technologies to Slovenia, - apply know-how to other fields of science and technology, - provoke participation of Slovenian industry in development, production and supply of high-tech products. The access to technology programmes at CERN as well as tendering for high-tech orders for the accelerator programme are severely hindered by the fact that Slovenia, in contrast to the remaining Middle-European states, is not yet a member state of CERN. The successful conclusion of ongoing negotiations for associate membership should remedy this, and significantly boost the socioeconomic return Exposure to top-level technology, many times even in the phase of its development are crucial in the formation of young researchers with a high innovation potential, as well as for senior scientists to keep up with the development of the technology and transfer this knowledge to their younger colleagues and students. The contacts established in collaborations often lead to participation in technology projects beyond the scope of the original scientific goal. The development of new computational methods in combination with distributed data processing is expected to stimulate the development of other branches of science where large computing capacities and/or computing simulations are needed (computing, informatics, meteorology, statistics) and in the final instance also significantly contribute to the development of the informatics infrastructure. As an example one can stress, that the world wide web (WWW) was developed at CERN in early 90's for the needs of LHC information exchange. To the present day it has become a new branch of information technology, with associated turnover counted in trillions. Similar predictions are also being made for the development of the distributed computing (Grid), which has been developed and is exploited for LHC computing.
Most important scientific results Annual report 2015, interim report
Most important socioeconomically and culturally relevant results Annual report 2015, interim report
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