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Scientific project: Search for the Higgs boson and new physics with the CMS detector

Project code  023-0982887-3064

Project name Search for the Higgs boson and new physics with the CMS detector

Senior researcher  Ivica Puljak

Institution of employment University of Split, Faculty of Electrical Engineering, Mechanical Engineering a...

Program name Experimental High Energy Physics: Standard Model and Beyond

Scientific area technical science

Peer review group Physics

Summary The Standard Model (SM) of elementary particles and their interactions is the best fundamental physical theory ever. All the predictions of the SM are experimentally verified up to energy scale of about 100 GeV. One of the most important unanswered questions in the SM is the origin of mass of elementary particles. The most plausible answer is the mechanism of spontaneous symmetry breaking or Higgs mechanism that predicts the existence of a new particle, Higgs boson. From theoretical arguments, direct search at LEP and experimental limits from electroweak precision measurements follows that Higgs boson mass is above 114.1 GeV and below 219 GeV at the 95% CL. Although the SM is extremely successful theory, is only an approximate one valid at low energies. This is indicated by many open issues like the divergences of higher order corrections to Higgs boson mass, number of free parameters in the theory, coupling constant unification, origin of dark matter and so on. Most of those issues can be settled by theories that posses an additional (super)symmetry requiring the existence of many new particles – superparticles. The most important goal of the CMS (Compact Muon Solenoid) detector at LHC at CERN is the search for Higgs bosons. Other important goals are the search for new physics and phenomena beyond the SM, like superparticles, massive vector bosons and extra dimensions. CMS will start data taking at the end of 2007. A group of physicists from University of Split are active members of the CMS Collaboration since 1994. Since then we participated in all the phases of the detector construction. During the proposed project we intend to continue our activities on: completion of construction and running of the electromagnetic calorimeter, preparation for data analysis and data analysis (search for Higgs boson and search for new physics phenomena). Beside these activities, we plan to continue work on the development of the new generation of avalanche photo diodes, as a natural extension of the successfully completed project of development and installation of avalanche photodiodes for the CMS ECAL. Results of the proposed project will depend, besides our contribution, on global characteristics of the LHC and CMS projects, such as LHC luminosity or performances of the CMS detector achieved. Research proposed in this project is important for acquiring new knowledge and will contribute to development of new technologies and to knowledge and technology transfer.

Key words |CMS|Higgs boson,LHC,Supersymmetry,Physics Beyond Standard Model,Standard Model Physics

Contract from 2.1.2007

Croatian scientific bibliography http://bib.irb.hr/lista-radova?sif_proj=023-0982887-3064&print=true&lang=EN

Address for communication
 Name and surname Ivica Puljak
 Street and no. FESB, R. Boškovića bb, 21 000, Split
 E-mail Ivica.Puljak@fesb.hr
 Web address www.fesb.hr/~puljak
Project assistants 
  Name and Surname  Status
Željko Antunović Researcher
Nikola Godinović Researcher
Marko Kovač Scientific novice
Damir Lelas Researcher
Karlo Lelas Scientific novice
Kristina Marasović Scientific novice
Roko Pleština Scientific novice
Dunja Polić Scientific novice
Ivica Puljak Project leader