New approach for calculating heavy-to-light form factors with QCD sum rules on the light-cone

We suggest a new approach for calculating heavy-to-light form factors. The method is based on light cone sum rules (LCSR) and covers the whole kinematical range of momentum transfer. The derivation of the new sum rule uses a suitable combination of double and single dispersion integrals. As an example we give numerical results for the form factor f^+ for the B -> pion transition.Comment: 13 pages, LaTe

On t anti-t threshold and top quark mass definition

In this talk we discuss the process e^+e^-\to t\bar t near threshold, calculated with NNLO accuracy as well as top quark mass definitions adequate for the threshold. As new definition we suggest the PS-bar mass which allows to calculate recoil corrections to the static PS mass. Using this result we calculate the cross section of e^+e^-\to t\bar t near threshold at NNLO accuracy adopting three alternative approaches, namely (1) fixing the pole mass, (2) fixing the PS mass, and (3) fixing the new mass which we call the PS-bar mass. We demonstrate that perturbative predictions for the cross section become much more stable if we use the PS or the PS-bar mass for the calculations. A careful analysis suggests that the top quark mass can be extracted from a threshold scan at NLC with an accuracy of about 100 MeV.Comment: 4 pages, LaTeX, the contribution to the Linear Collider Workshop 2000, Fermilab, October 2000; the slides of the talk presented by O. Yakovlev are available here: http://conferences.fnal.gov/lcws2000/web/Yakovlev_P2

On Higgs production in γγ collisions

I review recent progress on the Higgs production in γγ collisions at the photon mode of the Next Linear Collider (NLC). I mainly focus on two particular topics. The first topic is the Higgs-two photon vertex, which is sensitive to new physics, and can be considered a counter of the number of new heavy particles. I recall the results on QCD and electroweak two loop radiative corrections. The second topic is the heavy quark anti-quark pair production in γγ collisions, which is the dominant background process for the Higgs production at mH<150 GeV.mH<150GeV. We suggest a procedure for the resummation of double (DL) and single (SL) logarithms in the process γγ→b.γγ→bb̄. © 2001 American Institute of Physics.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/87643/2/317_1.pd

Radioholographic analysis of radioocculation data

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Social, Environmental, and Economic Fundamentals for the Development of a Biosphere Reserve in the Mining Area of South Ural

The paper dwells upon the theoretical foundations and practical issues of the development of a biosphere reserve as a component of a major social, environmental, and economic system. Mining South Ural is a biosphere reserve that is cited as an example of how the success of its development depends on the opportunity and adequacy of adapting the requirements of the World Network of Biosphere Reserves regulations (the UNESCO Man and the Biosphere program) to the historical specific issues of the reserve and its surrounding areas. Particular attention is paid to the specific matters of how the biosphere reserve has been formed under the conditions of the spatial integration of natural and urbanized areas of the old industrial region. The paper demonstrates the specifics of creating project-based solutions and drafting a biosphere reserve management plan for industrially developed areas