5,648 research outputs found
Searches for SUSY at LHC
One of the main motivations of experiments at the LHC is to search for SUSY
particles. The talk is based on recent analyses, performed by CMS
Collaboration, within the framework of the Supergravity motivated minimal SUSY
extension of the Standard Model. The emphasis is put on leptonic channels. The
strategies for obtaining experimental signatures for strongly and weakly
interacting sparticles productions, as well as examples of determination of
SUSY masses and model parameters are discussed. The domain of parameter space
where SUSY can be discovered is investigated. Results show, that if SUSY is of
relevance at Electro-Weak scale it could hardly escape detection at LHC.Comment: LaTeX, 6 pages, 8 eps figures. Presented at XXXII Rencontres de
Moriond: QCD and High Energy Hadronic Interactions, Les Arcs, Savoie, France,
March 22-29, 199
Polarization at HERA-
The production of mesons in fixed target collisions is
considered. It is shown that Non-Relativistic QCD predicts states to
be produced with sizeable transverse polarization. The possibility of a
measurement of the polarization at the HERA- experiment is
discussed.Comment: 9 pages, LaTeX, with 3 eps figs included with epsfig.st
Precision Physics at the LHC
A large number of precision measurements will be possible with the ATLAS and
CMS experiments at the CERN Large Hadron Collider (LHC). Examples from W
physics, Drell-Yan production of lepton pairs, Triple-Gauge Couplings,top
physics, Higgs and Supersymmetry are discussed.Comment: 13 pages, 9 figures, presented ate the 5th Zeuthen Workshop on
Elementary Particle Theory on "Loops and Legs in Quantum Field Theory"
Bastel/Konigstein, Germany, April 200
Top Mass Determination in Leptonic Final States with
Taking advantage of large top production rates at the LHC, the leptonic final states with J/psi are explored for a precise determination of the top quark mass. The top is partially reconstructed by combining the isolated lepton from the W with the J/psi from the decays of the corresponding b-quark. The method relies, to a large extent, on the proper Monte-Carlo description of top production and decay. The main emphasis is put on the expected systematics uncertainties. Mass measurement accuracy is dominated by the current understanding of theoretical uncertainties which result in a systematic error of <~1 GeV
SCET approach to top quark decay
In this work we study QCD corrections to the top quark doubly decay rate with
a detected hadron containing a quark. We focus on the regime among
which the emitted boson nearly carries its maxim energy. The tool that we
use here is the soft-collinear effective theory (SCET). The factorization
theorem based on SCET indicates a novel fragmenting jet function. We calculate
this function to next-to-leading order in . Large logarithms due to
several well separated scale are summed up using the renormalization group
equation (RGE). Finally we reach an analytic formula for the distribution which
could easily be generalized to other heavy hadron decay.Comment: 13 pages, 4 figure
Search for the next-to-lightest neutralino
We study the inclusive production of the next-to-lightest neutralino chi2,
decaying directly, or via slepton, into two leptons and the lightest
neutralino. The dilepton invariant mass spectrum in these decays has a
characteristic sharp edge near the kinematical upper limit. We propose to
exploit this feature as a search strategy for the chi2, and thereby for SUSY.
The possibilities to determine neutralinos and slepton masses are also
discussed.Comment: LaTeX, 10 pages, 7 eps figures; submitted to Nuclear Physics B; a
more detailed version is available under
ftp://cmsdoc.cern.ch/documents/97/note97_065.ps.
Approaches to Quality of Corporate Management Assessment in the Russian Companies with the State Participation
In the article need of complex assessment of quality of corporate management for the Russian companies with the state participation is considered. The role of corporate management in implementation of programs of long-term and innovative development in the Russian companies with the state participation is considered. Recommendations about improvement of corporate management in the specified companies are provided
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