137 research outputs found

    The probability of making a correct decision in hypotheses testing as estimator of quality of planned experiments

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    In the report the approach to estimation of quality of planned experiments is considered. This approach is based on the analysis of uncertainty, which will take place under the future hypotheses testing about the existence of a new phenomenon in Nature. The probability of making a correct decision in hypotheses testing is proposed as estimator of quality of planned experiments. This estimator allows to take into account systematics and statistical uncertainties in determination of signal and background rates.Comment: 6 pages (1 LaTeX file), 4 eps files (figures), improved the proof of good properties of the estimato

    Gaugino pair production at LHC for the case of nonuniversal gaugino masses

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    We investigate \chi^{+/-}_1 \chi^0_2 pair production at LHC (CMS) with subsequent decays into leptons for the case of nonuniversal gaugino masses. Visibility of signal by an excess over SM background in 3 leptons + no jet + E^{miss}_T events depends rather strongly on the relation between LSP mass \chi^0_1 and \chi^{+/-}_1 mass. We also give some preliminary results on the investigation of squark and gluino production at LHC for the case of nonuniversal gaugino masses.Comment: 1 latex files (10 pages

    LHC(CMS) SUSY discovery potential for the case of nonuniversal gaugino masses

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    We investigate squark and gluino pair production at LHC(CMS) for the case of nonuniversal gaugino masses. Visibility of signal by an excess over SM background in (n‚Č•2)jets+ETmiss+(m‚Č•leptons)(n \geq 2)jets + E^{miss}_T + (m \geq leptons) events depends rather strongly on the relation between LSP, gluino and squark masses and it decreases with the increase of LSP mass. For relatively heavy LSP mass close to squark or gluino masses it is possible to detect SUSY for (mq~,mg~)‚ȧ(1‚ąí1.5)(m_{\tilde{q}}, m_{\tilde{g}}) \leq (1 - 1.5) TeV.}Comment: 1 latex (3 pages), 2 eps (figures) files. Presented by N.V.Krasnikov at the 9th International Conference on Supersymmetries in Physics (SUSY 01), 11-17 Jun 2001, Dubna, Russi

    The Reach of LHC (CMS) for Models with Effective Supersymmetry and Nonuniversal Gaugino Masses

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    We investigate squark and gluino pair production at LHC (CMS) with subsequent decays into quarks, leptons and LSP in models with effective supersymmetry where third generation of squarks is relatively light while the first two generations of squarks are heavy. We consider the general case of nonuniversal gaugino masses. Visibility of signal by an excess over SM background in (n‚Č•2)jets+(m‚Č•0)leptons+ETmiss(n \geq 2)jets + (m \geq 0)leptons + E^{miss}_T events depends rather strongly on the relation between LSP, second neutralino, gluino and squark masses and it decreases with the increase of LSP mass.Comment: 1 latex file (21 pages) Presented by N.V.Krasnikov at the International Seminar "Quarks-2000", Pushkin, Russia, 14 - 21 may 200

    The search for sleptons and flavour lepton number violation at LHC (CMS)

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    We study a possibility to detect sleptons and flavour lepton number violation at LHC (CMS). We investigate the production and decays of right- and left-handed sleptons separately. We have found that for L = 10**5 1/pb it would be possible to discover right-handed sleptons with a mass up to 350 GeV and left-handed ones with a mass up to 350 GeV. We also investigate a possibility to look for flavour lepton number violation in slepton decays due to the mixing of different generations sleptons. We find that for the maximal (smu_R - se_R) mixing it is possible to detect such effect for sleptons with a mass up to 250 GeV.Comment: 2 latex files (27 pages, 6 pages), 1 eps file (figure
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