Spin Polarisability of the Nucleon in the Heavy Baryon Effective Field Theory

We have constructed a heavy baryon effective field theory with photon as an external field in accordance with the symmetry requirements similar to the heavy quark effective field theory. By treating the heavy baryon and anti-baryon equally on the same footing in the effective field theory, we have calculated the spin polarisabilities $\gamma_i, i=1...4$ of the nucleon at third order and at fourth-order of the spin-dependent Compton scattering. At leading order (LO), our results agree with the corresponding results of the heavy baryon chiral perturbation theory, at the next-to-leading order(NLO) the results show a large correction to the ones in the heavy baryon chiral perturbation theory due to baryon-antibaryon coupling terms. The low energy theorem is satisfied both at LO and at NLO. The contributions arising from the heavy baryon-antibaryon vertex were found to be significant and the results of the polarisabilities obtained from our theory is much closer to the experimental data.Comment: 21pages, title changed, minimal correction

DECISION-SUPPORT SYSTEM FOR WOOD HARVESTING PLANNING IN RUSSIA

Abstract: Extraction of wood by cut-to-length harvesting method (CTL) is becoming a common practice in Russia. Logging companies are faced a large number of options for CTL planning, but they have limited knowledge of the potential in CTL logistics. Objective is to develop a decision support system (DSS) for CTL analyzing at a company level. DSS provides the comprehensive view on the benefits and limitations of different CTL options for making sound short and long term decisions. DSS has been constructed in MapInfo environment using C++ for coding/simulation. The system generates delivery plans, which reduce the CTL costs and rationalize the usage of machinery fleet

Spectroscopic studies of fractal aggregates of silver nanospheres undergoing local restructuring

We present an experimental spectroscopic study of large random colloidal aggregates of silver nanoparticles undergoing local restructuring. We argue that such well-known phenomena as strong fluctuation of local electromagnetic fields, appearance of "hot spots" and enhancement of nonlinear optical responses depend on the local structure on the scales of several nanosphere diameters, rather that the large-scale fractal geometry of the sample.Comment: 3.5 pages, submitted to J. Chem. Phy

Q^2 Evolution of Generalized Baldin Sum Rule for the Proton

The generalized Baldin sum rule for virtual photon scattering, the unpolarized analogy of the generalized Gerasimov-Drell-Hearn integral, provides an important way to investigate the transition between perturbative QCD and hadronic descriptions of nucleon structure. This sum rule requires integration of the nucleon structure function F_1, which until recently had not been measured at low Q^2 and large x, i.e. in the nucleon resonance region. This work uses new data from inclusive electron-proton scattering in the resonance region obtained at Jefferson Lab, in combination with SLAC deep inelastic scattering data, to present first precision measurements of the generalized Baldin integral for the proton in the Q^2 range of 0.3 to 4.0 GeV^2.Comment: 4 pages, 3 figures, one table; text added, one figure replace

Backgrounds in Boundary String Field Theory

We study the role of closed string backgrounds in boundary string field theory. Background independence requires the introduction of dual boundary fields, which are reminiscent of the doubled field formalism. We find a correspondence between closed string backgrounds and collective excitations of open strings described by vertex operators involving dual fields. Renormalization group flow, solutions and stability are discussed in an example.Comment: Contribution to proceedings of SFT09 in 'Theoretical and Mathematical Physics', Russian Academy of Science

Pyrolysis of Kerogen of Bazhenov Shale: Kinetics and Influence of Inherent Pyrite

© 2017 American Chemical Society. In the present study, we investigated in detail the influence of the depyritization procedure on the structure and morphology of the organic matter of Bazhenov shale. We monitored both structural and morphological properties of the organic matter of shale during chemical treatment by a complex of physical methods, including different types of spectroscopies, scanning electron microscopy, and physisorption analysis. We also applied non-istothermal kinetic analysis to study the effect of inherent pyrite on the pyrolysis of kerogen in a wide temperature range and showed that the presence of inherent pyrite has no impact on the pyrolysis process