THE DECAY H20→ggH^0_2\to gg\ WITHIN THE MINIMAL SUPERSYMMETRIC STANDARD MODEL

I present a detailed SUSY QCD calculation of the decay rate of the lightest Higgs boson $H^0_2$\ into two gluons, where all quarks and scalar quarks are taken within the relevant loop diagrams. I include the mixing of all the scalar partners of the left and right handed quarks and show that their contribution is more than several tens of per cent compared to the quark contribution in the MSSM for some SUSY parameter space. Furthermore the fermionic contribution is enhanced by several factors for large $\tan\beta$\ and large Higgs masses. As a result, the two gluon decay rate of $H_2^0$\ is much larger than the two gluon decay rate of an equal mass standard model Higgs boson. I further compare the decay mode of $H^0_2\rightarrow gg$\ to the similar decay modes of $H^0_2\rightarrow c\overline c$\ and $H^0_2\rightarrow b\overline b$\ including one loop QCD corrections and show that in some cases $\Gamma(H^0_2\rightarrow gg)$\ is even higher than $\Gamma(H^0_2\rightarrow c\overline c)$, although still much smaller than $\Gamma(H^0_2\rightarrow b\overline b)$.Comment: 9 pages, plain tex, 6 figures not included, available under request. (a reference was added and an error in eq.(7) was corrected. Fig.3-5 are only changed for tan\beta=60 and small scalar masses m_S and Fig.6 is only changed for tan\beta=60 and small Higgs mass m_{H_2^0}

QCD CORRECTIONS TO THE H+ -->t anti-b decay within the minimal supersymmetric standard model

I present the results of the QCD corrections to the H+ --> t anti-b decay within the minimal supersymmetric standard model, if gluinos and scalar quarks are taken within the relevant loop diagram. I include the mixing of the scalar partners of the left- and right-handed top quark, which is proportional to the top quark mass. The standard corrections via gluons and quarks are about +8% for a charged Higgs mass of 300 GeV and about -11% for a Higgs mass of 800 GeV. I show that the standard corrections are diminished or enhanced by a non-negligible amount for certain values of the supersymmetric parameter space. I also obtain sign changes.Comment: UQAM-PHE-94/03, 5 pages, plain tex, 5 figures not included, available under request via mail or fa

THE DEVELOPMENT OF THE HUNGARIAN AGRICULTURAL TRADE AFTER THE EU ACCESSION

The paper discusses the changes of the Hungarian agricultural trade, and shows how different factors (both internal and external) determine the flow of agricultural trade. The analyses show that although the EU plays a role more and more important in the Hungarian trade, the balance became worse, partly because of the increase of import from Germany and from Poland. The worsening trend of the trade after the accession shows that although the competitiveness is increasing it is still behind the improvement of competitiveness of the members of the EU-15 and 10 (partly because of the change of trade agreements, of subsidies and tariffs). In advantageous years (for cereals) the trends of trade with Romania and Bulgaria may have a positive effect on the flow of the Hungarian trade after 2007.Hungary, EU, agriculture, trade, International Relations/Trade,

b-Bit Minwise Hashing

This paper establishes the theoretical framework of b-bit minwise hashing. The original minwise hashing method has become a standard technique for estimating set similarity (e.g., resemblance) with applications in information retrieval, data management, social networks and computational advertising. By only storing the lowest $b$ bits of each (minwise) hashed value (e.g., b=1 or 2), one can gain substantial advantages in terms of computational efficiency and storage space. We prove the basic theoretical results and provide an unbiased estimator of the resemblance for any b. We demonstrate that, even in the least favorable scenario, using b=1 may reduce the storage space at least by a factor of 21.3 (or 10.7) compared to using b=64 (or b=32), if one is interested in resemblance > 0.5