Results for "G. Cavoto"

total 108479took 0.15s
Recent MEG resultsDec 09 2010New results of a search for the ultra-rare decay $\mu \to e \gamma$ by the MEG collaboration are reported in this contribution. The data were taken during 2009 and correspond to approximately 6.5 10$^{13}$ muon stopped on target. A maximum likelihood ... More
Charm Dalitz AnalysesJul 09 2007A review of recent experimental results of Dalitz analyses of charmed meson decays into three-body final states is presented. These analyses can help in understanding the strong interaction dynamics leading to the observed light mesons spectrum (low mass ... More
Measurements of Charmless Hadronic B Decays Branching Fraction at BABARMay 10 2001We present preliminary measurements of the branching fractions for charmless hadronic decays of B mesons into two-body final states with kaons, pions and a phi resonance. The measurements are based on a data sample of approximately 23 million B-anti-B ... More
Angles from B Decays with Charm: Summary of Working Group 5 of the CKM Workshop 2006Jun 28 2007We summarize the results presented in Working Group 5 (WG5) of the CKM 2006 Workshop in Nagoya. The charge of WG5 was to discuss the measurements of unitarity triangle angles $\beta/\phi_1$ and $\gamma/\phi_3$ from $B$-meson decays containing charm quark(s) ... More
Deflection of proton beams by crystal miscut surfaceJan 21 2014First computer experiment results on proton beam deflection by the crystal miscut surface are presented. The phenomenology of proton channeling and quasichanneling has been applied to describe new features of the beam deflection. The analysis predicts ... More
Commissioning and operation of the Cherenkov detector for proton Flux Measurement of the UA9 ExperimentApr 12 2019The UA9 Experiment at CERN-SPS investigates channeling processes in bent silicon crystals with the aim to manipulate hadron beams. Monitoring and characterization of channeled beams in the high energy accelerators environment ideally requires in-vacuum ... More
Directional Dark Matter Searches with Carbon NanotubesDec 28 2014Dec 05 2015A new solution to the problem of dark matter directional detection might come from the use of large arrays of aligned carbon nanotubes. We calculate the expected rate of carbon ions channeled in single-wall nanotubes once extracted by the scattering with ... More
Searching for the mu into e gamma decay with MEG and MEG-IIJul 31 2014The MEG collaboration searches for the mu to e gamma decay at the muon beam line PiE5 of the Paul Scherrer Institut in Switzerland. The world best upper limit has been set to be BR(mu to e gamma) < 5.7 10^-13 at 90% C.L. analyzing a data set of 3.6 10^14 ... More
$\Bz\to\pip\pim\piz$ Time Dependent Dalitz analysis at BaBarApr 04 2007I present here results of a time-dependent analysis of the Dalitz structure of neutral $B$ meson decays to $\pip\pim\piz$ from a dataset of 346 million $B \bar B$ pairs collected at the $\Upsilon(4S)$ center of mass energy by the BaBar detector at the ... More
Study of the single cluster response of a helium-isobutane drift chamber prototype using 8 keV X-raysOct 31 2014The identification of single clusters in the electronic signals produced by ionizing particles within a drift chamber is expected to significantly improve the performances of this kind of detectors in terms of particle identification capabilities and ... More
Axion-like particle searches with sub-THz photonsOct 23 2015Jan 29 2016We propose a variation, based on very low energy and extremely intense photon sources, on the well established technique of Light-Shining-through-Wall (LSW) experiments for axion-like particle searches. With radiation sources at 30 GHz, we compute that ... More
WIMP detection and slow ion dynamics in carbon nanotube arraysFeb 09 2016Jun 10 2016Large arrays of aligned carbon nanotubes (CNTs), open at one end, could be used as target material for the directional detection of weakly interacting dark matter particles (WIMPs). As a result of a WIMP elastic scattering on a CNT, a carbon ion might ... More
MPGD Optical Read Out for Directional Dark Matter SearchJan 14 2019The Time Projection method is an ideal candidate to track low energy release particles. Large volumes can be readout by means of a moderate number of channels providing a complete 3D reconstruction of the charged tracks within the sensitive volume. It ... More
Spin Physics with a fixed-target experiment at the LHCMar 08 2019The multi-TeV proton and ion beams of the LHC would allow for the most energetic fixed-target experiment ever. In particular, $pp$, $p$d and $p$A collisions could be performed at $\sqrt{s_{NN}}$ = 115~GeV, as well as Pb$p$ and PbA collisions at $\sqrt{s_{NN}}$ ... More
Experimental results of crystal-assisted slow extraction at the SPSJul 17 2017The possibility of extracting highly energetic particles from the Super Proton Synchrotron (SPS) by means of silicon bent crystals has been explored since the 1990's. The channelling effect of a bent crystal can be used to strongly deflect primary protons ... More
Single-hit resolution measurement with MEG II drift chamber prototypesMay 25 2016Drift chambers operated with helium-based gas mixtures represent a common solution for tracking charged particles keeping the material budget in the sensitive volume to a minimum. The drawback of this solution is the worsening of the spatial resolution ... More
Gas Distribution and Monitoring for the Drift Chamber of the MEG-II ExperimentApr 23 2018The reconstruction of the positron trajectory in the MEG-II experiment searching for the $\mu^+ \to e^+ \gamma$ decay uses a cylindrical drift chamber operated with a helium-isobutane gas mixture. A stable performance of the detector in terms of its electron ... More
Averages of b-hadron Properties at the End of 2005Mar 01 2006This article reports world averages for measurements on b-hadron properties obtained by the Heavy Flavor Averaging Group (HFAG) using the available results as of at the end of 2005. In the averaging, the input parameters used in the various analyses are ... More
Probing the high-x content of the nuclei in the fixed-target mode at the LHCJan 23 2019Using the LHCb and ALICE detectors in the fixed-target mode at the LHC offers unprecedented possibilities to study the quark, gluon and heavy-quark content of the proton and nuclei in the poorly known region of the high-momentum fractions. We review our ... More
A Fixed-Target Programme at the LHC: Physics Case and Projected Performances for Heavy-Ion, Hadron, Spin and Astroparticle StudiesJul 02 2018Nov 09 2018We review the context, the motivations and the expected performances of a comprehensive and ambitious fixed-target program using the multi-TeV proton and ion LHC beams. We also provide a detailed account of the different possible technical implementations ... More
High luminosity fixed-target experiment at the LHCFeb 27 2019By extracting the beam with a bent crystal or by using an internal gas target, the multi-TeV proton and lead LHC beams allow one to perform the most energetic fixed-target experiments ever and to study $pp$, $p$d and $p$A collisions at $\sqrt{s_{NN}}=115$ ... More
A fixed-target programme at the LHC for heavy-ion, hadron, spin and astroparticle physics: AFTER@LHCSep 21 2018Thanks to its multi-TeV LHC proton and lead beams, the LHC complex allows one to perform the most energetic fixed-target experiments ever and to study with high precision pp, pd and pA collisions at sqrt(s_NN) = 115 GeV and Pbp and PbA collisions at sqrt(s_NN) ... More
Ultra-peripheral-collision studies in the fixed-target mode with the proton and lead LHC beamsFeb 18 2019We address the physics case related to the studies of ultra-peripheral pH, pPb, PbH, and PbPb collisions in the fixed-target mode at the LHC. In particular, we discuss how one can measure the gluon generalized parton distribution E_g(x,xi,t) in exclusive ... More
Averages of b-hadron and c-hadron Properties at the End of 2007Aug 09 2008Mar 14 2009This article reports world averages for measurements of b-hadron and c-hadron properties obtained by the Heavy Flavor Averaging Group (HFAG) using the results available at the end of 2007. For the averaging, common input parameters used in the various ... More
Averages of b-hadron, c-hadron, and tau-lepton PropertiesOct 08 2010Sep 06 2011This article reports world averages for measurements of b-hadron, c-hadron, and tau-lepton properties obtained by the Heavy Flavor Averaging Group (HFAG) using results available at least through the end of 2009. Some of the world averages presented use ... More
Muon polarization in the MEG experiment: predictions and measurementsOct 15 2015Apr 28 2016The MEG experiment makes use of one of the world's most intense low energy muon beams, in order to search for the lepton flavour violating process $\mu^{+} \rightarrow {\rm e}^{+} \gamma$. We determined the residual beam polarization at the thin stopping ... More
MEG Upgrade ProposalJan 30 2013Feb 04 2013We propose the continuation of the MEG experiment to search for the charged lepton flavour violating decay (cLFV) \mu \to e \gamma, based on an upgrade of the experiment, which aims for a sensitivity enhancement of one order of magnitude compared to the ... More
PTOLEMY: A Proposal for Thermal Relic Detection of Massive Neutrinos and Directional Detection of MeV Dark MatterAug 06 2018We propose to achieve the proof-of-principle of the PTOLEMY project to directly detect the Cosmic Neutrino Background (CNB). Each of the technological challenges described in [1,2] will be targeted and hopefully solved by the use of the latest experimental ... More
Measurement of the radiative decay of polarized muons in the MEG experimentDec 11 2013Mar 07 2016We studied the radiative muon decay $\mu^+ \to e^+\nu\bar{\nu}\gamma$ by using for the first time an almost fully polarized muon source. We identified a large sample (~13000) of these decays in a total sample of 1.8x10^14 positive muon decays collected ... More
The design of the MEG II experimentJan 15 2018The MEG experiment, designed to search for the mu+->e+ gamma decay at a 10^-13 sensitivity level, completed data taking in 2013. In order to increase the sensitivity reach of the experiment by an order of magnitude to the level of 6 x 10-14 for the branching ... More
The UA9 experimental layoutJun 29 2011The UA9 experimental equipment was installed in the CERN-SPS in March '09 with the aim of investigating crystal assisted collimation in coasting mode. Its basic layout comprises silicon bent crystals acting as primary collimators mounted inside two vacuum ... More
A limit for the mu -> e gamma decay from the MEG experimentAug 18 2009Mar 04 2010A search for the decay mu -> e gamma, performed at PSI and based on data from the initial three months of operation of the MEG experiment, yields an upper limit on the branching ratio of BR(mu -> e gamma) < 2.8 x 10**-11 (90% C.L.). This corresponds to ... More
Neutrino Physics with the PTOLEMY projectFeb 14 2019The PTOLEMY project aims to develop a scalable design for a Cosmic Neutrino Background (CNB) detector, the first of its kind and the only one conceived that can look directly at the image of the Universe encoded in neutrino background produced in the ... More
New limit on the lepton-flavour violating decay mu -> e gammaJul 27 2011Sep 02 2011We present a new result based on an analysis of the data collected by the MEG detector at the Paul Scherrer Institut in 2009 and 2010, in search of the lepton flavour violating decay mu->e gamma. The likelihood analysis of the combined data sample, which ... More
A Design for an Electromagnetic Filter for Precision Energy Measurements at the Tritium EndpointOct 15 2018We present a detailed description of the electromagnetic filter for the PTOLEMY project to directly detect the Cosmic Neutrino Background (CNB). Starting with an initial estimate for the orbital magnetic moment, the higher-order drift process of ExB is ... More
New constraint on the existence of the mu+-> e+ gamma decayMar 04 2013Apr 23 2013The analysis of a combined data set, totaling 3.6 \times 10^14 stopped muons on target, in the search for the lepton flavour violating decay mu^+ -> e^+ gamma is presented. The data collected by the MEG experiment at the Paul Scherrer Institut show no ... More
The MEG detector for $μ+\to e+γ$ decay searchMar 10 2013Apr 10 2013The MEG (Mu to Electron Gamma) experiment has been running at the Paul Scherrer Institut (PSI), Switzerland since 2008 to search for the decay \meg\ by using one of the most intense continuous $\mu^+$ beams in the world. This paper presents the MEG components: ... More
Gravitational radiation fields in teleparallel equivalent of general relativity and their energiesJan 05 2011We derive two new retarded solutions in the teleparallel theory equivalent to general relativity (TEGR). One of these solutions gives a divergent energy. Therefore, we used the regularized expression of the gravitational energy-momentum tensor, which ... More
Neutrinos in Physics and AstrophysicsFeb 28 2003Mar 05 2003The observed flavor oscillations of solar and atmospheric neutrinos determine several elements of the leptonic mixing matrix, but leave open the small mixing angle Theta_13, a possible CP-violating phase, the mass ordering, the absolute mass scale m_nu, ... More
Physics with SupernovaeJan 11 2002Core-collapse supernovae (SNe) are powerful neutrino sources and as such important targets for the growing array of neutrino observatories. We review the current status of SN theory and the expected characteristics of the neutrino signal. After recalling ... More
Fermi/LAT Gamma Ray Burst emission models and jet propertiesFeb 17 2010The GeV emission of Gamma Ray Bursts, first detected by EGRET in an handful of bursts, is now an established property of roughly the 10% of all bursts, thanks to the Fermi/LAT observations. GRB 090510, a short burst, is particularly interesting because ... More
Focusing inversion techniques applied to electrical resistance tomography in an experimental tankJun 27 2006We present an algorithm for focusing inversion of electrical resistivity tomography (ERT) data. ERT is a typical example of ill-posed problem. Regularization is the most common way to face this kind of problems; it basically consists in using a priori ... More
Orbit spaces of reflection groups with 2, 3, and 4 basic polynomial invariantsOct 23 1995Covariant or invariant functions under a compact linear group can be expressed in terms of functions defined in the orbit space of the group. The semialgebraic relations defining the orbit spaces of all finite coregular real linear groups with at most ... More
Allowed and observable phases in two-Higgs-doublet Standard ModelsApr 02 2003In Quantum Field Theory models of electro-weak interactions with spontaneously broken gauge invariance, renormalizability limits to four the degree of the Higgs potential, whose minima determine the possible vacuum states in tree approximation. Through ... More
The spectral energy distribution of self-gravitating protostellar disksJun 19 2001The long wavelength emission of protostellar objects is commonly attributed to a disk of gas and dust around the central protostar. In the first stages of disk accretion or in the case of high mass protostars, the disk mass is likely to be sufficiently ... More
Inertial range turbulence in kinetic plasmasNov 27 2007The transfer of turbulent energy through an inertial range from the driving scale to dissipative scales in a kinetic plasma followed by the conversion of this energy into heat is a fundamental plasma physics process. A theoretical foundation for the study ... More
To the possibility of a mobility edge in a random 1D lattice with long-range correlated disorderMar 03 2014Tight-binding 1D random system with long-range correlations is studied numerically using the localisation criterium, which represents the number of sites, covered by the wave function. At low degrees of disorder the signs of a mobility edge, predicted ... More
Spectral Dependence of Degree of Localization of Eigenfunctions of the 1D Schrodinger Equation with a Peacewise-Constant Random PotentialMay 13 2011The perturbation theory is developed for joint statistics of the advanced and retarded Green's functions of the 1D Schrodinger equation with a piecewise-constant random potential. Using this method, analytical expressions are obtained for spectral dependence ... More
Method for calculating one-exciton absorption spectrum of space-restricted latticesJun 22 1998The problem of the one-exciton absorption spectrum is considered for the lattice of two-level interacting atoms whose initial energy splitting depends on the coordinate. It is shown that for some types of interatomic interaction, this problem can be reduced ... More
Nuclear power for energy and for scientific progressNov 21 2012The Introduction in this paper underlines the present general situation for energy and the environment using the words of the US Secretary of Energy. A short presentation is made of some major nuclear power plants used to study one fundamental parameter ... More
Failure Analysis and Field Failures: a Real Shortcut to Reliability ImprovementSep 12 2007Starting from two case histories, where only after thorough Failure Analysis the suddenly appearance of a failure was linked to much earlier events, the possibility of improving the reliability and of adjusting the reliability prediction tools are discussed. ... More
Hyperbolic low-dimensional invariant tori and summations of divergent seriesJul 12 2001We consider a class of a priori stable quasi-integrable analytic Hamiltonian systems and study the regularity of low-dimensional hyperbolic invariant tori as functions of the perturbation parameter. We show that, under natural nonresonance conditions, ... More
On Weyl channels being covariant with respect to the maximum commutative group of unitariesMay 19 2006Aug 10 2006We investigate the Weyl channels being covariant with respect to the maximum commutative group of unitary operators. This class includes the quantum depolarizing channel and the "two-Pauli" channel as well. Then, we show that our estimation of the output ... More
Simulation of Graphene Nanoribbon Field Effect TransistorsApr 14 2007Jan 07 2008We present an atomistic three-dimensional simulation of graphene nanoribbon field effect transistors (GNR-FETs), based on the self-consistent solution of the 3D Poisson and Schroedinger equation with open boundary conditions within the non-equilibrium ... More
Motion Segmentation by SCC on the Hopkins 155 DatabaseSep 09 2009We apply the Spectral Curvature Clustering (SCC) algorithm to a benchmark database of 155 motion sequences, and show that it outperforms all other state-of-the-art methods. The average misclassification rate by SCC is 1.41% for sequences having two motions ... More
Spin-rotation coupling in compound spin objectsJan 31 2013We generalize spin-rotation coupling to compound spin systems. In the case of muons bound to nuclei in a storage ring the decay process acquires a modulation. Typical frequencies for $Z/A\sim 1/2$ are $\sim 3\times 10^6$Hz, a factor 10 higher than the ... More
Collective modes in the fluxonium qubitJun 29 2015Superconducting qubit designs vary in complexity from single- and few-junction systems, such as the transmon and flux qubits, to the many-junction fluxonium. Here we consider the question of wether the many degrees of freedom in the fluxonium circuit ... More
Entanglement renormalization in free bosonic systems: real-space versus momentum-space renormalization group transformsJan 16 2008Mar 05 2010The ability of entanglement renormalization (ER) to generate a proper real-space renormalization group (RG) flow in extended quantum systems is analysed in the setting of harmonic lattice systems in D=1 and D=2 spatial dimensions. A conceptual overview ... More
Wilson line breaking and gauge coupling unificationNov 04 2004We estimate the effect of threshold corrections coming from Wilson lines to gauge coupling unification in the weakly coupled heterotic string with orbifold compactification. By expressing the corrections in terms of an effective field theory calculation ... More
Two-point Correlation Function in Integrable QFT with Anti-Crossing SymmetryOct 20 1993The two-point correlation function of the stress-energy tensor for the $\Phi_{1,3}$ massive deformation of the non-unitary model ${\cal M}_{3,5}$ is computed. We compare the ultraviolet CFT perturbative expansion of this correlation function with its ... More
The Spin-Spin Correlation Function in the Two-Dimensional Ising Model in a Magnetic Field at $T=T_c$Jul 03 1995The form factor bootstrap approach is used to compute the exact contributions in the large distance expansion of the correlation function $<\sigma(x) \sigma(0)>$ of the two-dimensional Ising model in a magnetic field at $T=T_c$. The matrix elements of ... More
Local heterotic geometry in holomorphic coordinatesJan 03 1994Jan 10 1994In the same spirit as done for N=2 and N=4 supersymmetric non-linear $\si$ models in 2 space-time dimensions by Zumino and Alvarez- Gaum\'e and Freedman, we analyse the (2,0) and (4,0) heterotic geometry in holomorphic coordinates. We study the properties ... More
The coalescent structure of supercritical and subcritical continuous-time Galton-Watson treesSep 25 2017Jun 19 2018Take a continuous-time Galton-Watson tree with offspring distribution $L$. On the event that there are at least $k$ particles alive at a fixed time $T$ choose $k$ distinct particles uniformly from those alive. For each time $t \in [0,T]$, we can create ... More
On Symmetry Non-Restoration at High TemperatureJul 14 1995We study the effect of next-to-leading order contributions on the phenomenon of symmetry non-restoration at high temperature in an $O(N_1)\times O(N_2)$ model.
Spin-Rotation Coupling in Muon g-2 ExperimentsJun 21 2001Spin-rotation coupling, or Mashhoon effect, is a phenomenon associated with rotating observers. We show that the effect exists and plays a fundamental role in the determination of the anomalous magnetic moment of the muon.
Baryogenesis in $f(R)$-Theories of GravityOct 12 2006$f(R)$-theories of gravity are reviewed in the context of the so called gravitational baryogenesis. The latter is a mechanism for generating the baryon asymmetry in the Universe, and relies on the coupling between the Ricci scalar curvature $R$ and the ... More
A convergent scheme for one-loop evolutions of the Yukawa couplings in the MSSMJul 01 1999Integrated forms of the one-loop evolution equations are given for the Yukawa couplings in the MSSM, valid for any value of $\tan \beta$, generalizable to virtually any number of Yukawa fermions, and including all gauge couplings. These forms turn out ... More
Comment on "Dynamics of Weak First Order Phase Transitions"Nov 08 1995We comment on an earlier paper of M. Gleiser, regarding mechanisms of first-order phase transitions.
A multi-frequency study of the spectral index distribution in the SNR CTB 80Jul 29 2005We have conducted a study at radio wavelengths of the spectral behaviour of the supernova remnant (SNR) CTB 80. Based on an homogenised data set of integrated flux densities, we calculated for the whole SNR a radio index -0.36 +/- 0.02. The shape of the ... More
The Sato Grassmannian and the CH hierarchyFeb 29 2008We discuss how the Camassa-Holm hierarchy can be framed within the geometry of the Sato Grassmannian.
Simple Fluids with Complex Phase BehaviorMay 12 2000We find that a system of particles interacting through a simple isotropic potential with a softened core is able to exhibit a rich phase behavior including: a liquid-liquid phase transition in the supercooled phase, as has been suggested for water; a ... More
Local Magnetic Turbulence and TeV-PeV Cosmic Ray AnisotropiesNov 10 2011Aug 22 2012In the energy range from ~ 10^12 eV to ~ 10^15 eV, the Galactic cosmic ray flux has anisotropies both on large scales, with an amplitude of the order of 0.1%, and on scales between ~ 10 and ~ 30 degrees, with amplitudes smaller by a factor of a few. With ... More
Stationary Axisymmetric Solutions and their Energy Contents in Teleparallel Equivalent of Einstein TheoryMar 03 2015We apply the energy-momentum tensor which is coordinate independent to calculate the energy content of the axisymmetric solutions. Our results are compared with what have been obtained before within the framework of Einstein general relativity and M{\o}ler's ... More
Schwarzschild solution in extended teleparallel gravityJan 05 2015Tetrad field, with two unknown functions of radial coordinate and an angle $\Phi$ which is the polar angle $\phi$ times a function of the redial coordinate, is applied to the field equation of modified theory of gravity. Exact vacuum solution is derived ... More
Regularization of Kerr-NUT spacetimes and their thermodynamical quantitiesApr 27 2015In the context of the teleparallel equivalent of general relativity (TEGR) theory, continues calculations of the total energy and momentum for Kerr-NUT spacetimes using three different methods, the gravitational energy-momentum, the Riemannian connection ... More
Sulfur-bearing species in molecular cloudsOct 30 2014We study several molecules that could help in the solution of the missing sulfur problem in dense clouds and circumstellar regions, as well as in the clarification of the sulfur chemistry in comets. These sulfur molecules are: the trimer (CH2S)3 and the ... More
Neutrino Masses in Astrophysics and CosmologyDec 08 1997Cosmology yields the most restrictive limits on neutrino masses and conversely, massive neutrinos would contribute to the cosmic dark-matter density and would play an important role for the formation of structure in the universe. Neutrino oscillations ... More
Determination of the orbit spaces of non-coregular compact linear groups with one relation among the basic polynomial invariants in the $\hat P$-matrix approachAug 02 2000Invariant functions under the transformations of a compact linear group $G$ acting in $\real^n$ can be expressed in terms of functions defined in the orbit space of $G$. We develop a method to determine the isotropy classes of the orbit spaces of all ... More
Quick View on Jet Tomography at RHIC EnergiesDec 31 2003A strong suppression of Pi production in Au+Au collision was discovered at RHIC energies in the high-p_T region. The lack of this suppression in d+Au collision proved, this effect can be connected to final state effects, namely medium induced jet energy ... More
GRB 060218 and the outliers with respect to the Ep-Eiso correlationJan 31 2007GRB 031203 and GRB 980425 are the two outliers with respect to the Ep-Eiso correlation of long GRBs. Recently Swift discovered a nearby extremely long GRB 060218 associated with a SN event. The spectral properties of this bursts are striking: on the one ... More
Prediction of the Proton-to-Total Turbulent Heating in the Solar WindJun 21 2011This paper employs a recent turbulent heating prescription to predict the ratio of proton-to-total heating due to the kinetic dissipation of Alfvenic turbulence as a function of heliocentric distance. Comparing to a recent empirical estimate for this ... More
A Dynamical Model of Plasma Turbulence in the Solar WindFeb 13 2015A dynamical approach, rather than the usual statistical approach, is taken to explore the physical mechanisms underlying the nonlinear transfer of energy, the damping of the turbulent fluctuations, and the development of coherent structures in kinetic ... More
Thermal stability of self-gravitating, optically thin accretion disksFeb 09 2001In the dynamics of accretion disks, the presence of collective effects associated with the self-gravity of the disk is expected to affect not only the momentum transport, but also the relevant energy balance equations, which could differ substantially ... More
The Correlated Lloyd model: exact solutionFeb 24 2014Exactly solvable model of disordered system representing the generalized Lloyd model with correlated random potential is described. It is shown, that for the model under consideration, the averaged Green's function does not depend on random potential ... More
Exactly solvable spin dynamics of an electron coupled to large number of nuclei and the electron-nuclear spin echo in a quantum dotApr 03 2007Apr 10 2007The model considered in the paper is used nowadays to describe spin dynamics of quantum dots after optical excitation. Based on the exact diagonalization of a model Hamiltonian, we solve the problems of the electron spin polarization decay and magnetic ... More
Noise spectroscopy of optical microcavityMar 21 2012The intensity noise spectrum of the light passed through an optical microcavity is calculated with allowance for thermal fluctuations of its thickness. The spectrum thus obtained reveals a peak at the frequency of acoustic mode localized inside the microcavity ... More
PyECLOUD and build-up simulations at CERNSep 26 2013PyECLOUD is a newly developed code for the simulation of the electron cloud (EC) build-up in particle accelerators. Almost entirely written in Python, it is mostly based on the physical models already used in the ECLOUD code but, thanks to the implementation ... More
Cocycle conjugacy of quasifree endomorphisms semigroups on the CAR algebraOct 18 2000Oct 20 2000W. Arveson has described a cocycle conjugacy class $U(\alpha)$ of $E_0$-semigroup $\alpha$ on B(H) which is a factor of type $\rm I$. Under some conditions on $\alpha$, there is a $E_0$-semigroup $\beta \in U(\alpha)$ being a flow of shifts in the sence ... More
NANOTCAD2D: Two-dimensional code for the simulation of nanoelectronic devices and structuresDec 22 2003In this paper we present NANOTCAD2D, a code for the simulation of the electrical properties of semiconductor-based nanoelectronic devices and structures in two-dimensional domains. Such code is based on the solution of the Poisson/Schr\"odinger equation ... More
Split dimensional regularization for the Coulomb gauge at two loopsNov 25 1999Nov 29 1999We evaluate the coefficients of the leading poles of the complete two-loop quark self-energy \Sigma(p) in the Coulomb gauge. Working in the framework of split dimensional regularization, with complex regulating parameters \sigma and n/2-\sigma for the ... More
Metastable states in the planar 2d XY model and dissipation in superfluid flowJun 11 2004We use the Metropolis algorithm to study the stability of superfluid flow in a model system, namely the two-dimensional planar XY model. Flow properties are examined by studying the behaviour of the system in meta-stable ``twisted'' states. We demonstrate ... More
Renormalization group approach to the one-dimensional 1/4-filled Hubbard model with alternating on-site interactionsAug 30 1999The one-dimensional Hubbard model with different on-site interactions is investigated by renormalization group technique. In the case of a 1/4-filled band the dynamical nonequivalence of sites leads to the appearance of Umklapp processes in the system ... More
EChO spectra and stellar activity II. The case of dM starsJan 27 2014EChO is a dedicated mission to investigate exoplanetary atmospheres. When extracting the planetary signal, one has to take care of the variability of the hosting star, which introduces spectral distortion that can be mistaken as planetary signal. Magnetic ... More
Anisotropic illumination of AGN's accretion disk by a non thermal source : I General theory and application to the Newtonian geometryMay 29 1997We present a model of accretion disk where the disk luminosity is entirely due to the reprocessing of hard radiation impinging on the disk. The hard radiation itself is emitted by a hot point source above the disk, that could be physically realized by ... More
FRW in quadratic form of $f(T)$ gravitational theoriesJun 26 2015We derive asymptote solution of a homogeneous and isotropic universe governed by the quadratic form of the field equation of $f(T)$ gravity. We explain how the higher order of the torsion can provide an origin for late accelerated phase of the universe ... More
The Loop-Tree Duality: Progress ReportSep 08 2017We review the recent developments of the Loop-Tree Duality method, focussing our discussion on the first numerical implementation and its use in the direct numerical computation of multi-leg Feynman integrals. Non-trivial examples are presented.
Application of stochastic resonance in gravitational-wave interferometerJan 30 2006We investigate novel approach, which improves the sensitivity of gravitational wave (GW) interferometer due to stochastic resonance (SR) phenomenon, performing in additional nonlinear cavity (NC). The NC is installed in the output of interferometer before ... More
Advanced configuration of gravitational-wave interferometer on the base of "sensitive mode" in "white-light cavity"Nov 07 2002A novel conception of "sensitive mode" (SM) is proposed to apply in gravitational-wave advanced interferometer configuration. The SM is resonant oscillation of electromagnetic field in "white-light cavity", where the resonance line is broadened without ... More
The Phenomenologically symmetric geometry of two sets of rank (3,2)Jun 09 2014A geometry of two sets (GTS) is given on manifolds $\mathfrak{M}$ and $\mathfrak{N}$ by a metric (two-point) function $f:\mathfrak{M\times N}\to R$. Its phenomenological symmetry (PS) means that for some numbers of points from each manifold all the reciprocal ... More