Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-08-18
Physics
High Energy Physics
High Energy Physics - Phenomenology
3 pages, 1 figure, proceedings of the 2009 Europhysics Conference on High Energy Physics, 16-22 July 2009 Krakow, Poland
Scientific paper
Understanding the fundamental structure of matter requires an understanding of how quarks and gluons are assembled to form hadrons and of the structure of the protons which are the colliding particles at LHC. The arrangement of quarks and gluons inside nucleons can be probed by accelerating electrons, hadrons or nuclei to precisely controlled energies, smashing them into a target nucleus and examining in detail the final products. The LHC physics program is rich and has been widely described. It encompasses the searches for new particles up to masses of several TeV, including the elucidation of electroweak symmetry breaking and the possible observation of new symmetries at higher scales, and precision measurements of fundamental parameters in the electroweak and strong gauge sectors. Obviously, this program requires a precise understanding of the structure of the proton in terms of quarks and gluons, obtained from HERA and Tevatron. However, the knowledge on parton distribution functions (PDFs) is still limited for many aspects of LHC physics and the discovery potential is thus reduced. In this proceeding, we show on one example that it is possible to find some observables less sensitive to PDF uncertainties to probe with a high efficency new physics beyond the standard model.
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