7,915 research outputs found
A very cold laser-induced electron beam for studies on the friction force in an electron cooling experiment
No full textMeasurement of the time-dependent CP asymmetry in B0 -> J/ψ KS0 decays
No full textThis Letter reports a measurement of the CP violation observables SJ/ψK0S and CJ/ψK0S in the decay channel B0→J/ψK0S performed with 1.0 fb−1 of pp collisions at s√=7 TeV collected by the LHCb experiment. The fit to the data yields SJ/ψK0S=0.73±0.07(stat)±0.04(syst) and CJ/ψK0S=0.03±0.09(stat)±0.01(syst). Both values are consistent with the current world averages and within
expectations from the Standard Model
On the Fourier cosine—Kontorovich-Lebedev generalized convolution transforms
No full textsummary:We deal with several classes of integral transformations of the form \label {generalformula} f(x)\rightarrow D\int _{\mathbb R_+^2} \frac 1u ({\rm e}^{-u\cosh (x+v)}+{\rm e}^{-u\cosh (x-v)}) h(u)f(v) {\rm d}u {\rm d} v, where is an operator. In case is the identity operator, we obtain several operator properties on with weights for a generalized operator related to the Fourier cosine and the Kontorovich-Lebedev integral transforms. For a class of differential operators of infinite order, we prove the unitary property of these transforms on and define the inversion formula. Further, for an other class of differential operators of finite order, we apply these transformations to solve a class of integro-differential problems of generalized convolution type
Existence of weak solutions in elasticity
No full textSolvability and uniqueness of solutions to the problems of equilibrium, vibration and dynamics in a weak setup for classical and nonclassical models of linear elasticity are established in a unified framework sufficiently flexible to accommodate new elastic models
Stanzaic Forms in Evenki Poetry (the Example of V. Lebedev`s Works) as a Result of Educational Practice
No full textThe article studies the characteristics of poetry of the Evens – indigenous peoples of the North, Siberia and the Far East. Relying on Russian literature, the author examines the features of stanzas in the work of poets of the Evens. V. Lebedev`s works are analyzed as poetry examples of a representative of the Evens.В статье исследуются особенности поэзии эвенов – коренных малочисленных народов Севера, Сибири и дальнего Востока. Опираясь на российское литературоведение, автор рассматривает особенности строфики в творчестве эвенских поэтов. В качестве репрезентанта эвенской поэзии анализируется творчество В.д. Лебедева
Stanzaic Forms in Evenki Poetry (the Example of V. Lebedev`s Works) as a Result of Educational Practice
No full textThe article studies the characteristics of poetry of the Evens – indigenous peoples of the North, Siberia and the Far East. Relying on Russian literature, the author examines the features of stanzas in the work of poets of the Evens. V. Lebedev`s works are analyzed as poetry examples of a representative of the Evens.В статье исследуются особенности поэзии эвенов – коренных малочисленных народов Севера, Сибири и дальнего Востока. Опираясь на российское литературоведение, автор рассматривает особенности строфики в творчестве эвенских поэтов. В качестве репрезентанта эвенской поэзии анализируется творчество В.д. Лебедева
Mathematical study of boundary-value problems within the framework of Steigmann–Ogden model of surface elasticity
No full textMathematical questions pertaining to linear problems of equilibrium dynamics and vibrations of elastic bodies with surface stresses are studied. We extend our earlier results on existence of weak solutions within the Gurtin–Murdoch model to the Steigmann–Ogden model of surface elasticity using techniques from the theory of Sobolev’s spaces and methods of functional analysis. The Steigmann–Ogden model accounts for the bending stiffness of the surface film; it is a generalization of the Gurtin–Murdoch model. Weak setups of the problems, based on variational principles formulated, are employed. Some uniqueness-existence theorems for weak solutions of static and dynamic problems are proved in energy spaces via functional analytic methods. On the boundary surface, solutions to the problems under consideration are smoother than those for the corresponding problems of classical linear elasticity and those described by the Gurtin–Murdoch model. The weak setups of eigenvalue problems for elastic bodies with surface stresses are based on the Rayleigh and Courant variational principles. For the problems based on the Steigmann–Ogden model, certain spectral properties are established. In particular, bounds are placed on the eigenfrequencies of an elastic body with surface stresses; these demonstrate the increase in the body rigidity and the eigenfrequencies compared with the situation where the surface stresses are neglected
Measurement of the D+/- production asymmetry in 7 TeV pp collisions
No full textThe asymmetry in the production cross-section \sigma of D+/- mesons, A_P = (\sigma(D+) - \sigma(D-))/(\sigma(D+) + \sigma(D-)), is measured in bins of pseudorapidity \eta and transverse momentum p_T within the acceptance of the LHCb detector. The result is obtained with a sample of D+ -> K_S pi+ decays corresponding to an integrated luminosity of 1.0 fb^-1, collected in pp collisions at a centre of mass energy of 7 TeV at the Large Hadron Collider. When integrated over the kinematic range 2.0 K_S pi+ decay is negligible. No significant dependence on \eta or p_T is observed
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