Analytic structure of meson propagators in the proper-time regularized Nambu--Jona-Lasinio model

We analyze the analytic structure of meson propagators in the Nambu--Jona-Lasinio model with a proper-time regulator. We show that the regulator produces unphysical complex singularities. As a result the naive use of the Wick rotation is no longer allowed. Formulas involving integration over mesonic momenta, such as meson-loop contributions or dispersion relations for meson Green's functions, cannot be written in usual forms.Comment: revised versio

New methods in conformal partial wave analysis

We report on progress concerning the partial wave analysis of higher correlation functions in conformal quantum field theory.Comment: 16 page

AGE-RELATED DIFFERENCES IN THE REACTIVITY AND SENSIBILITY OF SKIN VEGETATIVE STRUCTURES DETERMINED BY MEANS OF VARYING IN INTENSITY ELECTROPHORETIC EFFECTS OF ACETYLCHOLINE

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STUDY OF ACUPUNCTURE EFFECT ON NEUROSIS PATIENTS BY USING THE METHOD OF CARDIOINTERVALOGRAPHY

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ТНЕ INFLUENCE Of CORТICAL FACТORS ON NEURO-VEGETAТIVE REACТIVIТY

The ргоblеm of interrelations between the cervical cortex and its higher vegetative centers has an essential bеагiпg on the complex process of influencing and regulating functions in the organisrn. Recently it has assumed а particular actuality, brought about bу the гapid progress of our knowledge on the physiological importance ol formatio reticularis in which higher vegetative centers аге included. With the pur pose of studying some particular aspects in this interrelation, we in­vestigated the changes in the neuro-vegetative reactivity during examination sessions of students; as well known, in them а widespread radiation occurs of excitation processes produced bу the examination state. The influence of the functional conditions of the сегеbгаl согtех on some of the vegetative functions during examination of students was also subject to investigation bу Gotzev and associates

2MASSJ22560844+5954299: the newly discovered cataclysmic star with the deepest eclipse

Context: The SW Sex stars are assumed to represent a distinguished stage in CV evolution, making it especially important to study them. Aims: We discovered a new cataclysmic star and carried out prolonged and precise photometric observations, as well as medium-resolution spectral observations. Modelling these data allowed us to determine the psysical parameters and to establish its peculiarities. Results: The newly discovered vataclysmic variable 2MASSJ22560844+5954299 shows the deepest eclipse amongst the known nova-like stars. It was reproduced by totally covering a very luminous accretion disk by a red secondary component. The temperature distribution of the disk is flatter than that of steady-state disk. The target is unusual with the combination of a low mass ratio q~1.0 (considerably below the limit q=1.2 of stable mass transfer of CVs) and an M-star secondary. The intensity of the observed three emission lines, H_alpha, He 5875, and He 6678, sharply increases around phase 0.0, accompanied by a Doppler jump to the shorter wavelength. The absence of eclipses of the emission lines and their single-peaked profiles means that they originate mainly in a vertically extended hot-spot halo. The emission H_alpha line reveals S-wave wavelength shifts with semi-amplitude of around 210 km/s and phase lag of 0.03. Conclusions: The non-steady-state emission of the luminous accretion disk of 2MASSJ22560844+5954299 was attributed to the low viscosity of the disk matter caused by its unusually high temperature. The star shows all spectral properties of an SW Sex variable apart from the 0.5 central absorption.Comment: Accepted for publication in Astronomy & Astrophysics. 12 pages, 11 figures, 6 table

ULTRASTRUCTURAL ASPECTS OF ENDOTHELIAL CELLS` SECRETORY FUNCTION IN RABBIT MAJOR BLOOD VESSELS

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ТНЕ EFFECT OF VARNA SEA-COAST CLIMAТIC FACTORS ON NEURO-VEGEТAТIVE REACТIVIТY

The effect of Black sea-coast factors оn various functions of healthy individuals and persons with various affections has been the objective of а number оf investigations in Bulgaria. The alterations of the neuro-vegetative reactivity under the effect of climatic factors of the sea-shore region is of special interest, for it greatly contributes to the elucidatjon оf the mechanism bу which these factors influence and mnodify the various functions оf the organism

Refined physical properties and g',r',i',z',J,H,K transmission spectrum of WASP-23b from the ground

Multi-band observations of planetary transits using the telescope defocus technique may yield high-quality light curves suitable for refining the physical properties of exoplanets even with small or medium size telescopes. Such observations can be used to construct a broad-band transmission spectrum of transiting planets and search for the presence of strong absorbers. We have thoroughly characterised the orbital ephemeris and physical properties of the transiting planet and host star in the WASP-23b system, constructed a broad-band transmission spectrum of WASP-23b and performed a comparative analysis with theoretical models of hot Jupiters. We observed a complete transit of WASP-23b in seven bands simultaneously, using the GROND instrument on the MPG/ESO 2.2m telescope at La Silla Observatory and telescope defocussing. The optical data were taken in the Sloan g',r',i' and z' bands. The resulting light curves are of high quality, with a root-mean-square scatter of the residual as low as 330ppm in the z'-band, with a cadence of 90s. Near-infrared data were obtained in the JHK bands. We performed MCMC analysis of our photometry plus existing radial velocity data to refine measurements of the ephemeris and physical properties of the WASP-23. We constructed a broad-band transmission spectrum of WASP-23b and compared it with a theoretical transmission spectrum of a Hot Jupiter. We measured the central transit time with a precision about 8s. From this and earlier observations we obtain an orbital period of P=2.9444300+/-0.0000011d. Our analysis also yielded a larger radius and mass for the planet (Rp=1.067+0.045-0.038 RJup and, Mp=0.917+0.040-0.039MJup). The transmission spectrum is marginally flat, given the limited precision of the measurements for the planet radius and poor spectral resolution of the data.Comment: 8 pages, 5 figures, accepted for publication in Astronomy & Astrophysic