Goals of the CMS Experiment
The Large Hadron Collider (LHC), which is constructed at CERN for the
studies of the proton interactions at the energy of 14 TeV, will provide the
unique opportunity to answer the most fundamental questions of the present-day
particle physics [1]:
- What is the origin of mass in nature?
According to the Standard Model, the origin of elementary particle masses
is related to the spontaneous symmetry breaking mechanism. An inevitable
consequences of this mechanism is the existence of the elementary particle
called Higgs boson with mass M<1 TeV. Are there one or more
fundamental scalar particles (i.e. Higgs particle) in the mass range
85-1000 GeV?
- Is there a Supersymmetry (SUSY) leading to Grand Unification
of the three forces at the energy 1016 GeV?
SUSY predicts the existence of new particles - the superanalogs of
the quarks, gluons and Higgs bosons. The masses of superparticles should
be less than 1-2 TeV. Therefore, if SUSY is correct the LHC will be able
to establish the existence of its signal. The lightest stable SUSY
particle is a potential source of the "dark matter", - the invisible
matter accounting for the well-known problem of the mass of the Universe.
- What is the origin of the matter - antimatter asymmetry?
Along with the Higgs boson and the SUSY particles, the discovery of
the CP violation in the decays of the B mesons is also possible. It brings
us to the understanding the mechanism of the CP violation, which play
an important role in the formation of the baryon asymmetry of the Universe.
- Does the new state of matter, the quark-gluon plasma exist?
Formation of the quark-gluon plasma is predicted at high temperatures,
or in heavy ion collisions.
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