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Search Results: 1 - 10 of 208500 matches for " L. Bezrukov "
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Non-minimal coupling in inflation and inflating with the Higgs boson
Bezrukov, F. L.
High Energy Physics - Phenomenology , 2008,
Abstract: We analyse the effect of the non-minimal coupling of the form $\xi\phi^2R/2$ on the single field inflation. If the non-minimal coupling is large, it relaxes the constraint on the field self coupling, making it possible to use the Standard Model Higgs field as the inflaton. At the same time, even small non-minimal coupling constant, $\xi\gtrsim10^{-3}$, brings the usual inflaton with quartic potential in agreement with the WMAP5 observations.
Geoneutrinos and Hydridic Earth (or primordially Hydrogen-Rich Planet)
L. Bezrukov,V. Sinev
Physics , 2014, DOI: 10.1134/S1063779615020057
Abstract: Geoneutrino is a new channel of information about geochemical composition of the Earth. We alnalysed here the following problem. What statistics do we need to distinguish between predictions of Bulk Silicate Earth model and Hydridic Earth model for Th/U signal ratio? We obtained the simple formula for estimation of error of Th/U signal ratio. Our calculations show that we need more than $22 kt \cdot year$ exposition for Gran-Sasso underground laboratory and Sudbury Neutrino Observatory. We need more than $27 kt \cdot year$ exposition for Kamioka site in the case of stopping of all Japanese nuclear power plants.
The Standard Model Higgs boson as the inflaton
Bezrukov, F. L.;Shaposhnikov, M. E.
High Energy Physics - Phenomenology , 2007, DOI: 10.1016/j.physletb.2007.11.072
Abstract: We argue that the Higgs boson of the Standard Model can lead to inflation and produce cosmological perturbations in accordance with observations. An essential requirement is the non-minimal coupling of the Higgs scalar field to gravity; no new particle besides already present in the electroweak theory is required.
Inflaton mass in the nuMSM inflation
Anisimov, Alexey;Bartocci, Yannick;Bezrukov, Fedor L.
High Energy Physics - Phenomenology , 2008, DOI: 10.1016/j.physletb.2008.12.028
Abstract: We analyse the reheating in the modification of \nuMSM (Standard Model with three right handed neutrinos with masses below the electroweak scale) where the sterile neutrino providing the Dark Matter is generated in decays of the additional inflaton field. We deduce that due to rather inefficient transfer of energy from the inflaton to the Standard Model sector reheating tends to happen at very low temperature, thus providing strict bounds on the coupling between the inflaton and the Higgs particles. This in turn translates to the bound on the inflaton mass, which appears to be very light 0.1 GeV <~ m_I <~ 10 GeV, or slightly heavier then two Higgs masses 300 GeV <~ m_I <~ 1000 GeV.
Standard Model Higgs boson mass from inflation
Bezrukov, Fedor L.;Magnin, Amaury;Shaposhnikov, Mikhail
High Energy Physics - Phenomenology , 2008, DOI: 10.1016/j.physletb.2009.03.035
Abstract: We analyse one-loop radiative corrections to the inflationary potential in the theory, where inflation is driven by the Standard Model Higgs field. We show that inflation is possible provided the Higgs mass m_H lies in the interval m_min
Deterministic multivalued logic scheme for information processing and routing in the brain
S. M. Bezrukov,L. B. Kish
Physics , 2009, DOI: 10.1016/j.physleta.2009.04.073
Abstract: Driven by analogies with state vectors of quantum informatics and noise-based logic, we propose a general scheme and elements of neural circuitry for processing and addressing information in the brain. Specifically, we consider random (e.g., Poissonian) trains of finite-duration spikes, and, using the idealized concepts of excitatory and inhibitory synapses, offer a procedure for generating 2^N-1 orthogonal vectors out of N partially overlapping trains ("neuro-bits"). We then show that these vectors can be used to construct 2^(2^N-1)-1 different superpositions which represent the same number of logic values when carrying or routing information. In quantum informatics the above numbers are the same, however, the present logic scheme is more advantageous because it is deterministic in the sense that the presence of a vector in the spike train is detected by an appropriate coincidence circuit. For this reason it does not require time averaging or repeated measurements of the kind used in standard cross-correlation analysis or in quantum computing.
Fast simulation of the Cherenkov light from showers
L. B. Bezrukov,A. V. Butkevich
Physics , 2001,
Abstract: A method for fast simulation of the Cherenkov light generated by electromagnetic showers is described. The parametrization for the longitudinal profile is used and fluctuations and correlations of the parameters are taken into account in a consistent way. Our method dramatically reduces the CPU time and its results are in a rather good agreement with a full Monte Carlo simulation.
O(4) symmetric singular solutions and multiparticle cross sections in $φ^4$ theory at tree level
F. L. Bezrukov,M. V. Libanov,S. V. Troitsky
Physics , 1995, DOI: 10.1142/S0217732395002283
Abstract: We solve the classical euclidean boundary value problem for tree-level multiparticle production in $\phi^4$ theory at arbitrary energies in the case of $O(4)$ symmetric field configurations. We reproduce known low-energy results and obtain a lower bound on the tree cross sections at arbitrary energies.
Transverse muon polarization in K+ -> mu+ nu_mu gamma: scanning over the Dalitz plot
F. L. Bezrukov,D. S. Gorbunov,Yu. G. Kudenko
Physics , 2003, DOI: 10.1140/epjc/s2003-01297-x
Abstract: We study the potential of the measurement of the transverse muon polarization P_T in the K->mu nu gamma decay with the sensitivity of \delta P_T ~ 10^{-4}. It is shown that the forthcoming experiment can measure the contribution of the electromagnetic final state interactions to P_T that gives a possibility to unambiguously determine the signs of the sum of the kaon form factors F_V and F_A even without fixing their difference. We also estimate the sensitivity of this experiment to the new physics, which could give rise to T-violation: multi-Higgs doublet models, supersymmetric extensions of the Standard Model, left-right symmetric model and leptoquark models.
Pinning down the kaon form factors in K^+ -> mu^+ nu_mu gamma decay
F. L. Bezrukov,D. S. Gorbunov,Yu. G. Kudenko
Physics , 2003, DOI: 10.1103/PhysRevD.67.091503
Abstract: We find that the normal muon polarization in the decay K->mu nu_mu gamma is very sensitive to the values of the kaon vector F_V and axial-vector F_A form factors. It is shown that the ongoing KEK-E246 experiment can definitely determine the signs of the sum of the form factors if their difference is fixed from other considerations. This method can also verify the form factor values and signs obtained from the K^+ -> l^+ nu_l e^+ e^- decays. A new experiment with sensitivity to the normal and transverse muon polarizations of about 10^-4 will provide a unique possibility to determine the F_V and F_A values with a few percent accuracy.
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