A.I. L»vov ,
№ 14 ABOUT A ROLE OF POLARIZATION POTENTIAL IN THE LOW ENERGY pd SCATTERING AND RADIATIVE CAPTURE
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An influence of a polarization correction ??гto a repulsive Coulomb potential ? г on low energy properties of the pd system is discussed. In contrast with preceding statements the polarization potential is shown to have no essential effect on the radiative capture cross section at E->0 and on experimentally obtained Coulombmodified scattering length and effective range.
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P.A. Bolashenko , V.P. Frolov ,
№ 28 THE QUANTUM THEORY OF NEUTRINO FIELD IN THE SPACETIME OF A ROTATING BLACK HOLE
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V.P. Andreev , P.S. Baranov , L.V. Pilkov , S.W. Levonyan , Yu.S. Pol ,
№ 33 ANTIDEUTERON-TANTALUM INTERACTION AT 12.2 GEV/C
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V.M. Eleonsky , N.E. Kulagin , V.P. Silin ,
№ 44 SOLITONS: PHASE PORTRAIT, BIFURCATIONS
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R.R. Metsaev , A.A. Tseytlin ,
№ 48 EQUIVALENCE OF THE STRING EQUATIONS OF MOTION AND THE SIGMA-MODEL WEYL INVARIANCE CONDITIONS: DEPENDENCE ON THE DILATON AND THE ANTISYMMETRIC TENSOR
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We prove the on-shell equivalence of the order альфа» -terms in the strong effective equations (for the graviton, dilaton and the antisymmetric tensor) to the vanishing of the corresponding (two-loop) terms in the Weyl anomaly coefficients for the general bosonic Сигма-model. We first determine the АЛЬФА’-term in the string effective action starting with the known expressions for the 3- and 4-point string amplitudes. Then we compute the two-loop БЕТА-function in the general СИГМА-model with the antisymmetric tensor coupling. Special emphasis is made on the renormalization scheme dependence of the BETA-function. Our result disagrees with previously known one and cannot be manifestly expressed in terms of the generalized curvature for ttoe connection with torsion. Ws also prove (to the order АЛЬФА’2 that the parallelizable spaces are solutions of the string equations of motion and establish the complete 5-loop expression for the «central charge» coefficient.
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И.Л. Бухбиндер , В.Б. Вологодский , Ю.Ю. Вольфенгаут , О.К. Калашников , И.Л. Шапиро ,
№ 49 АСИМПТОТИЧЕСКОЕ ПОВЕДЕНИЕ КОНСТАНТ СВЯЗИ МАТЕРИИ В КОНФОРМНОЙ КВАНТОВОЙ ГРАВИТАЦИИ
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The Grand Unification model that includes conformal quantum gravity is considered. One-loop counter-terms are calculated, and the renormalization group equations are derived for Yukawa and scalar coupling constants. The possibility of asymptotical freedom with respect to all coupling con?stants is investigated, the Yukawa coupling constants are shown to be al?ways asvmototically free, the inclusion of gravitational interaction has made them tend to zero faster. The behaviour of the scalar coupling con?stants is analyzed for the Grand Unification model with the gauge groups 0(M) and SU(N). The inclusion of the gravitational interaction is shown to have no effect upon the threshhold value of N, above which the asymptotical freedom takes piece. However, the interaction with a quantized gravi-, tational field weakens the limitations on the number of fermion multiplets. For the theory with the gauge group SU(2), a special solution to the renormalization group equations is found, for which the intensity of all interactions, including gravitational, are determined by a single gauge coupling constant.
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A.G. Vitukhnovsky , B.L. Pitel , I.M. Sokolov ,
№ 58 STUDIES OF KINETICS AND SPATIAL BEHAVIOUR OF RECOMBINATION REACTION A+B=0
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V.E. Lopatin , M.A. Vasiliev ,
№ 75 FREE MASSLESS BOSONIC FIELDS OF ARBITRARY SPIN IN d-DIMENSIONAL DE SITTER SPASE
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Free massless boscnie fields of arbitrary spins s >1, corresponding to aysnetrie representations of S0(d-2) cospacfc subgroup of the d-dlmen-siofiai Baseless flat little group, are described in d-diaensional (anti-) de Sitter space in terns of differential Pome, *5ne Ibraulation proposed la a generalisation to arbitrary d>=4 of that suggested previously in the four dinensional ease, ahieh served in raft./1,2/ as a starting point fbr introducing consistent gravitational interaction for all saesless higher spin ilelde in d*4.
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P.A. Bolashenko , V.P. Frolov ,
№ 82 THE DENSITY MATRIX AND GENERATING FUNCTIONAL FOR THE QUANTIZED NEUTRINO FIELD IN THE SPACE-TIME OF A ROTATING BLACK HOLE
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D.S. Chernavskii , V.I. Goldanskii , Yu.F. Krupyanskii , I.V. Kurinov , I.P. Susdalev ,
№ 102 PHASE TRANSITIONS IN MACROMOLECULAR CONSTRUCTIONS
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A.I. Podgorny ,
№ 103 A CURRENT SHEET INSTABILITY, WHICH CAN LEAD TO THE FAST RECONSTRUCTION OF A MAGNETIC FIELD
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MHD-instabllity of the current sheet which can lead to the fast magnetic field reconstruction is considered. The studied processes probably occur during solar flares. The instability is connected with the increase of the magnetic field component normal to the sheet and hence, the increase of the magnetic stretch force which propels plasma out of the sheet. In its turn, the normal magnetic component increases due to magnetic line bending connected with the nonuniform plasma inflow in the sheet by disturbances. Plasma flow along the sheet and gas pressure in the sheet are stabilizing factors. If plasma density near the sheet becomes sufficiently small, then the stabilizing influence of pressure decreases because plasma flow in the sheet cannot compensate plasma outflow along the sheet. This effect appears only if plasma compressibility is taken into account. The instability increment grows at the nonlinear stage since during the development of instability plasma density near the sheet decreases. Another possibility of instability increment grows at the nonlinear stage must be realized if the inflow velocity increases up to the value of the order of thermal velocity.
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A.A. Tseytlin ,
№ 108 CONDITIONS OF WEYL INVARIANCE OF TWO-DIMENSIONAL SIGMA-MODEL FROM EQUATIONS OF STATIONARITY OF ?CENTRAL CHARGE? ACTION
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Generalizing the «c-theorem» of Zamolodchikov to the ease of the bosonic сигма-model with the dilaton coupling we prove that the conditions of its Weyl invariance (presumably equivalent to the tree-level Bose string equations of motion) can be derived as equations of motion from some action. A simple expression for the action is found.
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R.R. Metsaev , M.A. Rahmanov , A.A. Tseytlin ,
№ 137 THE BORN-INFELD ACTION AS THE EFFECTIVE ACTION IN THE OPEN SUPERSTRING THEORY
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Correcting the previous claim by one of the authors we show (using the partition function approach) teat the effective action of the open superstring theory coincides (in tee abelian and F = const limit) with the Born-Infeld action. In the second part of tee work we construct order F6 supersymmetric extension of the D = 10 Maxwell theory. We find teat tee F4 +F6 terms in tee action can be uniquely determined from the requirement of tee D = 10 supersymmetry and precisely coincide with the terms appearing in the expansion of the Born-Infeld action.
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O.I. Piskounova ,
№ 140 PRODUCTION OF STRANGE-CHARMED PARTICLES (F-MESONS AND A-HYPERONS) IN QUARK-GLUON STRINGS MODEL
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Inclusive spectra and production cross sections of strange-charmed hadrons in p and K-p interactions have been calculated and compared with experimental data. The corresponding functions of fragmentation of quarks in F-mesons and A-hyperons were constructed. Results of calculations can be useful for future experimental investigations of the production of strange-charmed particles.
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Yu.V. Bogdanov , S.I. Kanorskii , A.A. Papchenko , I.I. Sobelman , V.N. Sorokin , I.I. Struk , E.A. Yukov ,
№ 144 COLLISIONAL BROADENING OF SPECTRAL LINES CORRESPONDING TO THE TRANSITIONS BETWEEN EXCITED LEVELS OF ATOMIC CESIUM
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V.Yu. Bychenkov , V.P. Silin , S.A. Uryupin ,
№ 167 Anomalous heating, transport, selforganization and instability in the plasma with ion-acoustic turbulence
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One of the most important problems in plasma turbulence the?ory remains one of the nonlinear state evolution of a plasma un?der d-c electric field. In this report we qualitatively describe such evolution in a plasma with ion-acoustic turbulence (IAT). The velocity redistribution, heating, influence of such redistri?bution on the ГАТ are taken into account. The results of the ana?lytical XAT theory are compared with computer simulations. The theory of the self-similar space-nonhomogeneous electron distri?bution is given. To understand the experimentally observed self-organizing plasme structures the transport* theory for a plasma with 1ЛТ is used. It is shown that anomalous transport is the re?ason of the new hydrodynamic instability, that leads to the ano?malous transport of the momentum flux density in a plasma.
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O.D. Dalkarov , V.A. Karmanov ,
№ 173 LOw energy antiprotons as new probe of nuclear fraction mechanism
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Tse experimental data of LBAJt, KSK and BHL on low energy anti-proton lnteraotion with nuclei are analysed in the framework of Qlstuber-Sitenkc approach. It ia shown that antlproian-mieleuo lnteraotion gives new information on nuclear reaction mechanism, on nuclear structure and on parameters of pfe-aapUtude.
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A.V. Marshakov ,
№ 176 Some properties of O(2) string theory.
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Tree and one-loop approximation in the N=2 world-sheet supersymmetric 0(2) string theory in D=2 and flat background is considered. The consistent definition of Koba-Nielsen type string amplitudes in 0(N) models based on the supersymmetric Faddeev-Popov procedure is proposed. One-loop path integral is caculated, it is reduced to the integral over «extended» supermoduli space. The result coincides exactly with the corresponding results in the two-dimensional field theory.
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R.R. Metsaev , A.A. Tseytlin ,
№ 193 ON LOOP CORRECTIONS TO STRING THEORY EFFECTIVE ACTIONS
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We make sane contents concerning toe structure of loop corrections to an effective action (EA) for massless fields of a string. The singular part of the a? ?>0 limit of the one-loop EA in the open (super)string theory is studied and is shown to be in correspondence with the ultra-violet divergent part of the one-loop effective action in the (super) Yang-Mills theory. In particular, we repro?duce the known result about the absence of опе-1оор infinities in D=26 Yang-Mills theory starting from the open Bose string theory. We also discuss the path integral representation for EA (EA = generalized partition function for the sigma-model) and use it to compute the open string theory EA on the disc and the annulus.
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И.Н. Завестовская , В.И. Игошин , В.А. Катулин , И.В. Шишковский ,
№ 201 ЧИСЛЕННОЕ МОДЕЛИРОВАНИЕ ПОВЕРХНОСТНОЙ ЗАКАЛКИ СТАЛЕЙ ПОД ДЕЙСТВИЕМ ЛАЗЕРНОГО ИЗЛУЧЕНИЯ С УЧЕТОМ ТЕПЛОВЫХ, КИНЕТИЧЕСКИХ И ДИФФУЗИОННЫХ ПРОЦЕССОВ
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Process at laser hardening of steels was investigated theoretically and numerically? We hare solved the equation, which describes heat transfer under laser treatment, including isothermal hardening. We have also solved a kinetic equation for the gamma-phase nucleus rise, and a carbon diffusion equation which takes into account the carbide decay process. The laser hardening depth for the carbon and high-speed steels has been determined. It is shown that the hardening depth for high-speed steels is less than the one in the heat effected stone. Are discussed the ways for optimization of the laser treatment to produce larger laser hardening depth.
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A.S. Borisov , A.M. Dunaevsky , L.P. Nikolaeva ,
№ 212 THE STRUCTURAL SPOTS IN X-RAY FILMS OF EMULSION CHAMBERS
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The properties of the structural spots produced by unresol?ved Gamma-rays have been semiquantitatively investigated in’ the case of the simulated gamma-families. The obtained results show that the aggregation of Gamma-rays has to be taken into account in simulations of gamma-families for every mountain SC-experiment.
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I.L. Beigman , L.A. Bureyeva ,
№ 214 CLASSICAL APPROACH FOR PROCESSES OF ANGULAR MOMENTUM TRANSFER TO ATOMS BY ELECTRONS
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M.A. Vasiliev ,
№ 217 FREE MASSLESS FERMIONIC FIELDS OF ARBITRARY SPIN IN d-DIMENSIONAL DE SITTER SPACE
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Free massless fermionic fields of arbitrary spins, corresponding to fully synmetric tensor-spinor irreducible representations of the flat little group S0(d-2), are described in d-dimensional anti-de Jitter space in terms of differential ferns. Appropriate linearized higher-spin eurva-tura, 2-form3 are found. Explicitly gauge invariant higher-spin actions are constructed in terms of these linearized curvatures.
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I.L. Beigman , M.I. Syrkin ,
№ 220 ANGULAR MOMENTUM TRANSFER TO RYDBERG ATOMS BY SLOW CHARGED PARTICLES. CLOSE-COUPLING METHODS
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The cross-sections of the transitions Na 28D-zdL, L>2 induced by charged particles are calculated by close-coupling method for the velocities v
I.L. Beigman , B.N. Chichkov ,
№ 225 ELECTRON-ATOM EXCITATION IN THE STRONG LIGHT FIELD
Скачать препринт [spoiler]The interaction of an electron beam with atoms in the presence of the strong light field is studied. It is shown that in underthreshold region of the electron energy the excitation process goes with the absorption of many photons. Such processes can play an important role in multiphoton ionization of atoms.
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A.D. Mironov , I.I. Royzen ,
№ 240 QCD APPROACH TO HARD DIFFRACTION DISSOCIATION
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Hard double diffraction processes are considered at high energies in the QCD framework. The relationship between QCD and Regge phenomenology approaches is established and their validity limitations are outlined. Qualitative experimental effects rela?ted to these processes are discussed.
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S.B. Shaulov ,
№ 245 STATISTICAL CRITERIA FOR THE COMBINATION EVENTS IN EXC AND EAS (Experiment ?Hadron?)
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At this article the questions of the events combination for X-ray emulsion chamber and extensive air showers are discussed. It is suggested concret events combination criteria which is clone se to Nelman-Pirson criteria. We recieved the evaluation for the portion of background events among the combined events too.
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M.A. Vasiliev ,
№ 246 LINEARIZED CURVATURES FOR AUXILIARY FIELDS IN THE DE SITTER SPACE
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New consistent linearized curvatures in the de Sitter space are constructed. The sequence of actions, describing bosconic and ferrmionlc gauge auxiliary fields, is found based on these curvatures. The proposed actions are parametrized by twо integer parameters, n>=0 and m>=0. ‘Ihe simplest case n=m=0 corresponds in the flat limit to the auxiliary fields of «new minimal» supergravity. The hamiltonian formulation is developed for the auxiliary fields suggested: harailtonians and first-and second-class constraints are constructed. Using these results, it is shovm that the systems of fields prooosed possess no dynamical degrees of freedom in de 5;itter and flat spaces. In addition the hamiltcnian foraalisn is analysed fbr some free dynamical systems corresponding to linearized hither-spin curvatures introduced previously.
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N.G. Basov , E.M. Belenov , A.A. Isaev , V.V. Kurenkov , V.B. Kozhukhovsky , V.I. Panteleev , E.G. Romanov , A.A. Yurkin , E.O. Yanenko , A.V. Uskov ,
№ 254 Physical and chemical processes in the electroionization discharge plasma
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O.D. Chernavskaya , D.S. Chernavskii ,
№ 263 SOME ASPECTS OF THE KINETIC ANALYSIS OF THE PHASE TRANSITION FROM THE QCD-PLASMA TO HADRONIC SUBSTANCE IN THE COURSE OF HYDRODYNAMIC EXPANSION
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E.S. Fradkin , M.A. Vasiliev ,
№ 264 SUPERALGEBRA OF HIGHER SPINS AND AUXILIARY FIELDS
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An infinite-dimensional non-abelian superalgebra is constructed denoted as shsa(l) which gives rise at the linearized level to linearized curvatures of both massless and auxiliary fields, suggested previously by one of us (M.V.). Various properties of shsa(l) are analysed in detail. Specifically, subalgebras of shsa(l) are found which pretend themselves forthe role of independent stper-algsbras of higher spins and auxiliary fields. A simple operator realization of shsa(l) is presented. P-reversal automorphisms are constructed. N=2 de Sitter siperalgebra osp(2,4) is shown to be a maximal finite-dimensional subalgebra of shsa(l)/o(2). It is observed that the even (boson) stfcalgsbra of shsa(l) decompo?ses into the direct sum of two infinite-dimensional lie algebra^ each giving rise to massless fields of all spins. Possible physical implications of this fact are discussed briefly.
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V.R. Karasik , Yu.F. Eltzev , O.E. Omelianovsky , T.G. Togonidze ,
№ 271 THE CLASTER NATURE OF SUPERCONDUCTIVITY IN LA1,8Sro.2Cu04-y AND YBazCu3Oz-Y CERAMICS
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A.A. Ostrovsky , G.A. Vilkovsky ,
№ 284 THE COVARIANT EFFECTIVE ACTION IN QED. ONE-LOOP MAGNETIC MOMENT
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The paper starts the programme of rewriting quantum electrodynamics in terms of the manifestly covariant and covariantly computed effective action. A general method for obtaining non-local terms in the effective action is proposed and the term responsible for the one-loop magnetic moment of the electron is worked out. In contrast to the usual calculation based on Green functions, the present calculation nowhere encounters the infrared divergences (including renormalization and restriction to the physical mass shell). Comparison with the method of Green functions shows inadequacy of the latter.
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A.A. Tseytlin ,
№ 290 STRING THEORY EFFECTIVE ACTION: STRING LOOP CORRECTIONS
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We discuss the general ideology of the computation of string loop corrections to the effective action for the massless modes of the string. Both the S-matrix and the sigma-model approaches are presented. It is emphasised that the effective action is a more general and better defined object than the S-matrix. In particular, it is finite in spite of modular infinities that may be present in loop amplitudes computed near a «wrong» vacuum. The case of the disc topology in the open-closed string theory is treated in some detail. Some issues concerning the soft dilaton vertex operators related to the infinities of the string amplitudes are discussed.
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V.R. Karasik , T.G. Togonidze , O.E. Omelianovsky , Yu.F. Eltsev ,
№ 296 CRITICAL CURRENT AND MAGNETIZATION OF YВа2Си3О7-g AND EuBa2Cu3 О7- g SYSTEMS
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A.I. Golovashkin , V.A. Danilov , O.M. Ivanenko , G.M. Leitus , K.V. Mitsen , I.I. Perepechko , O.G. Karpinskii , V.F. Shamray ,
№ 305 ANOMALOUS BEHAVIOR OF ELASTIC CHARACTERISTICS YBa2Cu307 NEAR TC
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V.E. Markushin ,
№ 336 STICKING, STRIPPING AND X-RAYS IN MUON CATALYZED FUSION
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The modern statue of the problem of muon sticking and reactivation in the muon catalyzed fusion is illuminated. New theoetical results concerning initial sticking, stripping and X-ray intensities for pCF reaction in dt(i, ddp, ttp, pdp, and ptjj mesic molecules are presented and discussed in connection vith up-to-date and future experiments.
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V.Ya. Fainberg , A.V. Marshakov ,
№ 338 LOCAL SUPERSYMMETRY AND DIRAC PARTICLE PROPAGATOR AS A PATH INTEGRAL
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Frooendlng from reparametrlsation — inTariant and looally aupersjvmetrlc action for the Dlrac particle, the path integral repreeantatlon for the Oreen function, aatisfylng the first order equation in the external Haiwell field ie ohtaia-ed.
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V.J. Alexeev , E.V. Alieva , K.A. Belovitsev , E.G. Bessonov , A.V. Serov , P.A. Chernkov ,
№ 339 OBSERVATIONS ON EMISSION GENERATION IN THE FREE-ELECTRON LASER BASED ON THE MICROTRON
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Has bееп built and put into operation the free electron laser, using coherent undulator radiation. To present the ex?perimental data on generation radiation in the milimeter range wavelength.
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A.I. L ,
№ 344 PHENOMENON OF ELECTRIC AND MAGNETIC POLARIZABILITY OF PARTICLES IN RELATIVISTIC THEORY
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We discuss a phenomenology of the static dipole electric and magnetic polarizabilities of spin <=1/2 particles emphasizing the pecularities and ambiguities caused by relatxvistic effects. Interrelations between different definitions of the polarizabilities are considered; in particular, the definitions via Compton scattering and via energy level shift are argued to be equivalent. In general, a universal character of the polarizabilities as the values determining the particle structure manifestations in different two-photon processes at low energies is demonstrated. A new low-energy formula for the neutron-nucleus scattering cross section, which relativistically allows for the neutron polarizability, is found. Considering the forward virtual Compton scattering we obtain a rather short derivation of an old microscopic formula for electric, and of a new formula for magnetic, polarizability. Explicitly constructing a seairelativistic effective Hamiltonian and calculating an induced dipole moment of the particle placed in an external field we clarify a physical significance additional terms in relativistic formulae for the polarizabilities.
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O.D. Cernavskaya , M.I. Treyakova , G.B. Zhanov ,
№ 345 UNIQUE EVENT OF CENTRAL INTERACTION OF CALCIUM NUCLEUS 13 (Ez=1,2х10) WITH HEAVY NUCLEUS OF PHOTOEMULSION
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In nuclear photoemulsion exposed at an altitude~25 km of stratosphere during the area scanning was observed the higli nultiplicity event of the 13 type 6 + 9 + 328 (Z = 20, = 1.2-10 eV). The data are presented z about the angular characters of the secondary charged particles from the interaction. A new method is proposed to study the pseudorapidity density of the shower particles using pseudorapidity differences of the adjucent particles.
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S.V. Panyukov , A.D. Zaikin ,
№ 347 Quantum fluctuations and cohtrent effects in small josephson junctions
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Abstract. Quantum properties of small Josephson junctions with both linear Ohmic and quasiparticle («cosine») dissipation are investigated. Quantum diffusion of the quasicharge and quantum corrections to the classical conductivity are analyzed. The cur?rent-voltage characteristics and the effect of voltage steps are studied. We show that coherent voltage oscillations may exist not only for small but also for large values of the junction tunneling conductivity. For not very small values of quasipar?ticle conductivity of the junction the frequency of these osci?llations is two times larger than the Bloch oscillations fre?quency. We study the phase diagram of the system for different values of the Josephson coupling energy and show that linear and «cosine» dissipation mechanisms cause the presence of dissipa-tive phase transitions of two types. These phase transitions are qualitatively different from each other in many aspects.
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E.J. Ferrer , V.de la. Incera ,
№ 348 BOSE-EINSTEIN CONDENSATION IN MANY-PARTICLE GAUGE THEORIES AND EXTERNAL CHARGE
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The realization of the charged Bose-ElnBtein condensation in gauge theories with finite particle density is investigated. Bxaaples are found for a situation when two charged Bose-Einstein condensates coexist in equilibriim in a/steas described by Abelian gauge theories. Also Abelian and non-Abelian systems are constructed for which a charged Bose-Einstein condensate is balanced by the charge of a ferBionio aubaystea. A llaitlng transition to infinitely heavy fermions with infinite chemical potential is pointed out, irtiioh turns the fermionic subsystem into an external charge in an Abelian theory. On the contrary, the non-Abelian gauge theory with external charge cannot be obtained by the same dynamical limiting process sinoe it requires a special quantization scheme. It is realized for the Yang-Mills-Higgs model with a constant external charge. Eigenfrequenoies of the system are found, which include an additional quantum degree of freedom induced by the external charge. The contribution of the elgenfrequenoies into the tbermodynamioal potential is found.
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E.J. Ferrer , V.. Incera ,
№ 349 Phase transition of the many-particle weinberg-salam system at finite temperature
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A method is proposed for calculating high-temperature asymp?totic behaviour of effective potential which is intended to deal with the situation when the spectra of particles cannot be found explicitly. This method is applied to calculating the high-tempe?rature effective potential of a gas of particles described by the Weinberg-Salam model in presence of leptonic charge density, as well as of all the nonzero average fields (W-condensate, Higgs scalar, electric and weak-neutral chemical potentials) that ap?pear as solution of the equilibrium equations of this system at V zero temperature with the overall electric and weak neutrality preserved. There are three possible phases of the system: the symmetrical phase, the phase with the Higgs condensate, and the one with the Higgs and W-condensate. Equations for the boundary curves separating these phases are obtained and solved.
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