Results for "Alberto Amo"

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Phase-controlled bistability of a dark soliton train in a polariton fluidJul 13 2016We use a one-dimensional polariton fluid in a semiconductor microcavity to explore the rich nonlinear dynamics of counter-propagating interacting Bose fluids. The intrinsically driven-dissipative nature of the polariton fluid allows to use resonant pumping ... More
Some dual conditions for global weak sharp minimality of nonconvex functionsJan 22 2013Weak sharp minimality is a notion emerged in optimization, whose utility is largeley recognized in the convergence analysis of algorithms for solving extremum problems as well as in the study of the perturbation behaviour of such problems. In the present ... More
On the Polyak convexity principle and its application to variational analysisMar 29 2013According to a result due to B.T. Polyak, a mapping between Hilbert spaces, which is $C^{1,1}$ around a regular point, carries a ball centered at that point to a convex set, provided that the radius of the ball is small enough. The present paper considers ... More
Backscattering suppression in supersonic 1D polariton condensatesSep 26 2011We investigate the effects of disorder on the propagation of one-dimensional polariton condensates in semiconductor microcavities. We observe a strong suppression of the backscattering produced by the imperfections of the structure when increasing the ... More
Truly Online Paging with Locality of ReferenceJan 30 2006The competitive analysis fails to model locality of reference in the online paging problem. To deal with it, Borodin et. al. introduced the access graph model, which attempts to capture the locality of reference. However, the access graph model has a ... More
Prime Points in Orbits: Some Instances of the Bourgain-Gamburd-Sarnak ConjectureJul 15 2017We use Vaughan's variation on Vinogradov's three-primes theorem to prove Zariski-density of prime points in several infinite families of hypersurfaces, including level sets of some quadratic forms, the Permanent polynomial, and the defining polynomials ... More
The Poisson boundary of CAT(0) cube complex groupsMay 09 2011We consider a finite-dimensional, locally finite CAT(0) cube complex X admitting a co-compact properly discontinuous countable group of automorphisms G. We construct a natural compact metric space B(X) on which G acts by homeomorphisms, the action being ... More
Photometric Redshifts of Galaxies in the Hubble Deep FieldSep 17 1997We describe our application of broad-band photometric redshift techniques to faint galaxies in the Hubble Deep Field. To magnitudes AB(8140) < 26, the accuracy of the photometric redshifts is a few tenths and the reliability of the photometric redshifts ... More
New activity pattern in human interactive dynamicsMay 22 2014Sep 27 2015We investigate the response function of human agents as demonstrated by written correspondence, uncovering a new universal pattern for how the reactive dynamics of individuals is distributed across the set of each agent's contacts. In long-term empirical ... More
An Empirical Limit on Extremely High Redshift GalaxiesJun 16 1998We apply the Lyman absorption signature to search for galaxies at redshifts z \~ 6 - 17 using optical and infrared images of the Hubble Deep Field. The infrared images are sensitive to a point source 5 sigma detection threshold of AB(22,000) = 23.8, which ... More
Star-forming galaxies at very high redshiftsJun 27 1996Analysis of the deepest available images of the sky, obtained by the Hubble Space Telescope, reveals a large number of candidate high-redshift galaxies. A catalogue of 1,683 objects is presented, with estimated redshifts ranging from $z=0$ to $z>6$. The ... More
Existence and stability properties of entire solutions to the polyharmonic equation $(-Δ)^m u=e^u$ for any $m\ge 1$Mar 04 2014We study existence and stability properties of entire solutions of a polyharmonic equation with an exponential nonlinearity. We study existence of radial entire solutions and we provide some asymptotic estimates on their behavior at infinity. As a first ... More
Theoretical study of stimulated and spontaneous Hawking effects from an acoustic black hole in a hydrodynamically flowing fluid of lightJun 07 2016We propose an experiment to detect and characterize the analog Hawking radiation in an analog model of gravity consisting of a flowing exciton-polariton condensate. Under a suitably designed coherent pump configuration, the condensate features an acoustic ... More
Galaxies of Redshift z > 5: The View from Stony BrookOct 29 1999We report on some aspects of our efforts to establish properties of the extremely faint galaxy population by applying our photometric redshift technique to the HDF and HDF-S WFPC2 and NICMOS fields. We find that cosmological surface brightness dimming ... More
The holographic dual of a Riemann problem in a large number of dimensionsMay 04 2016Aug 19 2016We study properties of a non equilibrium steady state generated when two heat baths are initially in contact with one another. The dynamics of the system we study are governed by holographic duality in a large number of dimensions. We discuss the "phase ... More
Diophantine approximation exponents on homogeneous varietiesJan 25 2014Recent years have seen very important developments at the interface of Diophantine approximation and homogeneous dynamics. In the first part of the paper we give a brief exposition of a dictionary developed by Dani and Kleinbock-Margulis which relates ... More
The lattice point counting problem on the Heisenberg groupsApr 24 2014We consider the radial and Heisenberg-homogeneous norms on the Heisenberg groups given by $N_{\alpha,A}((z,t)) = \left(|z|^\alpha + A |t|^{\alpha/2}\right)^{1/\alpha}$, for $\alpha \ge 2$ and $A>0$. This natural family includes the canonical Cygan-Kor\'anyi ... More
Input Convex Neural NetworksSep 22 2016This paper presents the input convex neural network architecture. These are scalar-valued (potentially deep) neural networks with constraints on the network parameters such that the output of the network is a convex function of (some of) the inputs. The ... More
The effect of quenched disorder in neutral theoriesApr 03 2013We study systems with two symmetric absorbing states, such as the voter model and variations of it, which have been broadly used as minimal neutral models in genetics, population ecology, sociology, etc. We analyze the effects of a key ingredient ineluctably ... More
Protein Design is a Key Factor for Subunit-subunit AssociationFeb 16 1999Fundamental questions about the role of the quaternary structures are addressed using a statistical mechanics off-lattice model of a dimer protein. The model, in spite of its simplicity, captures key features of the monomer-monomer interactions revealed ... More
Discovery of Calcium, Indium, Tin, and Platinum IsotopesJun 21 2010Sep 08 2010Currently, twenty-four calcium, thirty-eight indium, thirty-eight tin and thirty-nine platinum isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, including ... More
Entropy production in systems with random transition ratesAug 07 2017We study the entropy production of a system with a finite number of states connected by random transition rates. The stationary entropy production, driven out of equilibrium both by asymmetric transition rates and by an external probability current, is ... More
Accurate and efficient description of protein vibrational dynamics: comparing molecular dynamics and Gaussian modelsMay 07 2004Current all-atom potential based molecular dynamics (MD) allow the identification of a protein's functional motions on a wide-range of time-scales, up to few tens of ns. However, functional large scale motions of proteins may occur on a time-scale currently ... More
A motivic version of the theorem of Fontaine and WintenbergerMay 18 2014We prove the equivalence between the categories of motives of rigid analytic varieties over a perfectoid field $K$ of mixed characteristic and over the associated (tilted) perfectoid field $K^{\flat}$ of equal characteristic. This can be considered as ... More
Bisimulation and p-morphism for branching-time logics with indistinguishability relationsFeb 26 2013May 02 2013In Zanardo, 1998, the Peircean semantics for branching-time logics is enriched with a notion of indistinguishability at a moment t between histories passing through t. Trees with indistinguishability relations provide a semantics for a temporal language ... More
Optimal time and space regularity for solutions of degenerate differential equationsJun 23 2008We derive optimal regularity, in both time and space, for solutions of the Cauchy problem related to a degenerate differential equation in a Banach space X. Our results exhibit a sort of prevalence for space regularity, in the sense that the higher is ... More
Anisotropic dynamics of a vicinal surface under the meandering step instabilityOct 17 2009We investigate the nonlinear evolution of the Bales-Zangwill instability, responsible for the meandering of atomic steps on a growing vicinal surface. We develop an asymptotic method to derive, in the continuous limit, an evolution equation for the two-dimensional ... More
Espaces de configuration généralisés. Espaces topologiques $i$-acycliques. Suites spectrales "basiques"Sep 02 2016Nov 17 2016The generalized (ordered) configuration spaces associated to a topological space $X$ are the spaces $\Delta_{\leq\ell}X^{m}:=\{(x_1,\ldots,x_{m})\in X^{m}\mid\#\{x_1,\ldots,x_{m}\}\leq \ell\}$ and $\Delta_{\ell}X^{m}:=\Delta_{\leq\ell}X^{m}\setminus \Delta_{\leq\ell-1}$. ... More
Critical fluctuations in the breakdown of disordered systemsOct 02 2002Oct 07 2002In this paper some critical aspects of the behaviour of breaking lattices subject to slow driving forces are briefly reviewed. In particular fluctuations in the response to the variation of external parameters are discussed.
Experimental Review on Lepton Universality and Lepton Flavour Violation tests at the B-factoriesSep 11 2007Since 1999, the B-factories collaborations BABAR and Belle have accumulated and studied large samples of tau lepton pairs. The experimental results on Lepton Universality checks and Lepton Flavour Violation searches are reported.
Status and New Ideas Regarding Liquid Argon DetectorsJul 26 2013Large (up to $\sim 100$ kt) liquid argon time-projection chamber detectors are presently being considered for proton decay searches and neutrino astrophysics, as well as for far detectors for the next generation of long-baseline neutrino oscillation experiments ... More
Radiative Corrections and the Standard Model of Elementary ParticlesDec 17 2003This presentation includes an introductory discussion of the unification of fundamental forces, properties of the elementary particles, Quantum Electrodynamics, the transition from Quantum Electrodynamics and Weak Interactions to Electroweak Physics, ... More
Ten Years of Precision Electroweak PhysicsDec 03 1999Dec 07 1999We review a number of theoretical developments in Precision Electroweak Physics that are closely connected with the interpretation of experiments. The emphasis is on the test of the Standard Model at the level of its quantum corrections, the search for ... More
Holographic Superfluids and Superconductors in Dilaton-GravityJul 16 2012Sep 29 2012We investigate holographic models of superfluids and superconductors in which the gravitational theory includes a dilatonic field. Dilaton extensions are interesting as they allow us to obtain a better description of low temperature condensed matter systems. ... More
The synergy between the Dark Energy Survey and the South Pole TelescopeApr 11 2013Oct 29 2013The Dark Energy Survey (DES) has recently completed the Science Verification phase (SV), collecting data over 150 sq. deg. of sky. In this work we analyze to what extent it is beneficial to supplement the analysis of DES data with CMB lensing data. We ... More
A note on a third order curvature invariant in static spacetimesMar 06 2007We consider here the third order curvature invariant $I=R_{\mu\nu\rho\sigma;\delta}R^{\mu\nu\rho\sigma;\delta}$ in static spacetimes ${\cal M}=R\times\Sigma$ for which $\Sigma$ is conformally flat. We evaluate explicitly the invariant for the $N$-dimensional ... More
Comment on ``Theorem for nonrotating singularity-free universes''Aug 11 1998We show that Raychaudhuri's recently proposed theorem on nonrotating universes cannot be used to rule out realistic singularity-free descriptions of the universe, as suggested by him in PRL 80, 654 (1998).
Communication complexity and the reality of the wave-functionDec 04 2014Jan 14 2015In this review, we discuss a relation between quantum communication complexity and a long-standing debate in quantum foundation concerning the interpretation of the quantum state. Is the quantum state a physical element of reality as originally interpreted ... More
A note on probability and Hilbert's VI problemMar 18 2015We start from various shortcomings, errors and dilemmas which arise in applications of probability. We argue that, together with similar issues in mechanics, they constitute the core of Hilbert's VI problem. In the paper we indicate a solution to these ... More
PDFs from nucleons to nucleiFeb 05 2016I review recent progress in the extraction of unpolarized parton distributions in the proton and in nuclei from a unified point of view that highlights how the interplay between high energy particle physics and lower energy nuclear physics can be of mutual ... More
Qualitative properties of coexistence and semi-trivial limit profiles of nonautonomous nonlinear parabolic Dirichlet systemsMay 19 2015We study the symmetry properties of limit profiles of nonautonomous nonlinear parabolic systems with Dirichlet boundary conditions in radial bounded domains. In the case of competitive systems, we show that if the initial profiles satisfy a reflectional ... More
The Galois closure for rings and some related constructionsFeb 04 2015Let $R$ be a ring and let $A$ be a finite projective $R$-algebra of rank $n$. Manjul Bhargava and Matthew Satriano have recently constructed an $R$-algebra $G(A/R)$, the Galois closure of $A/R$. Many natural questions were asked at the end of their paper. ... More
A Simple Motivated Completion of the Standard Model below the Planck Scale: Axions and Right-Handed NeutrinosJan 15 2015Mar 11 2015We study a simple Standard Model (SM) extension, which includes three families of right-handed neutrinos with generic non-trivial flavor structure and an economic implementation of the invisible axion idea. We find that in some regions of the parameter ... More
Magnetic field-Induced Nonlinear Optical Responses in Inversion Symmetric Dirac SemimetalsOct 19 2016Nov 14 2016We show that, under the effect of an external magnetic field, a photogalvanic effect and the generation of second harmonic wave can be induced in inversion-symmetric and time reversal invariant Dirac semimetals. The mechanism responsible of these non ... More
Solving the Standard Model Problems in Softened GravityAug 03 2016The Higgs naturalness problem is solved if the growth of Einstein's gravitational interaction is softened at an energy $ \lesssim 10^{11}\,$GeV (softened gravity). We work here within an explicit realization where the Einstein-Hilbert Lagrangian is extended ... More
On loose Legendrian knots in rational homology spheresJul 16 2017We prove that loose Legendrian knots in a rational homology contact 3-sphere, satisfying some additional hypothesis, are Legendrian isotopic if and only if they have the same classical invariants. The proof requires a result of Dymara on loose Legendrian ... More
The Monsky-Washnitzer and the overconvergent realizationsSep 05 2015We construct the dagger realization functor for analytic motives over non-archimedean fields of mixed characteristic, as well as the Monsky-Washnitzer realization functor for algebraic motives over a discrete field of positive characteristic. In particular, ... More
Quantum stochastic equations for an opto-mechanical oscillator with radiation pressure interaction and non-Markovian effectsJun 24 2015The quantum stochastic Schroedinger equation or Hudson-Parthasareathy (HP) equation is a powerful tool to construct unitary dilations of quantum dynamical semigroups and to develop the theory of measurements in continuous time via the construction of ... More
Converse theorems: from the Riemann zeta function to the Selberg classMay 08 2016This is an expanded version of the author's lecture at the XX Congresso U.M.I., held in Siena in September 2015. After a brief review of L-functions, we turn to the classical converse theorems of H.Hamburger, E.Hecke and A.Weil, and to some later developments. ... More
The reverse mathematics of wqos and bqosJul 26 2017Nov 18 2017In this paper we survey wqo and bqo theory from the reverse mathematics perspective. We consider both elementary results (such as the equivalence of different definitions of the concepts, and basic closure properties) and more advanced theorems. The classification ... More
Solution for the problem of the game heads or tailsDec 02 2010Dec 07 2010In this paper, we describe the solution for a problem dealing with definite properties of binary sequences. This problem, proposed by Xavier Grandsart in the form of a mathematical contest, has been solved also by Maher Younan, Ph.D. student of Theoretical ... More
More non semigroup Lie gradingsSep 26 2008This note is devoted to the construction of two very easy examples, of respective dimensions 4 and 6, of graded Lie algebras whose grading is not given by a semigroup, the latter one being a semisimple algebra. It is shown that 4 is the minimal possible ... More
Riemann-Roch for homotopy invariant K-theory and Gysin morphismsMay 03 2016We prove the Riemann-Roch theorem for homotopy invariant $K$-theory and projective local complete intersection morphisms between finite dimensional noetherian schemes, without smoothness assumptions. We also prove a new Riemann-Roch theorem for the relative ... More
Quadratic GravityApr 26 2018Aug 15 2018Adding terms quadratic in the curvature to the Einstein-Hilbert action renders gravity renormalizable. This property is preserved in the presence of the most general renormalizable couplings with (and of) a generic quantum field theory (QFT). The price ... More
On the higher Riemann-Roch without denominatorsJan 27 2019We prove two refinements of the higher Riemann-Roch without denominators: a statement for regular closed immersions between arbitrary finite dimensional noetherian schemes, with no smoothness assumptions, and a statement for the relative cohomology of ... More
Automatic differentiation for error analysis of Monte Carlo dataSep 05 2018Feb 06 2019Automatic Differentiation (AD) allows to determine exactly the Taylor series of any function truncated at any order. Here we propose to use AD techniques for Monte Carlo data analysis. We discuss how to estimate errors of a general function of measured ... More
The quest for electronic ferroelectricity in organic charge-transfer crystalsApr 16 2019Organic ferroelectric materials are in demand in the growing field of environmentally friendly, lightweight electronics. Donor-Acceptor charge transfer crystals have been recently proposed as a new class of organic ferroelectrics, which may possess a ... More
On Equivariant Poincaré Duality, Gysin Morphisms and Euler ClassesFeb 13 2017Nov 10 2017The aim of these notes, originally intended as an appendix to a book on the foundations of equivariant cohomology, is to set up the formalism of the $G$-equivariant Poincar\'e duality for oriented $G$-manifolds, for any connected compact Lie group $G$, ... More
An introduction to associative geometry with applications to integrable systemsNov 02 2016The aim of these notes is to provide a reasonably short and "hands-on" introduction to the differential calculus on associative algebras over a field of characteristic zero. Following a suggestion of Ginzburg's we call the resulting theory associative ... More
Second maximal subgroups of the finite alternating and symmetric groupsOct 21 2008A subgroup of a finite group G is said to be second maximal if it is maximal in every maximal subgroup of G that contains it. A question which has received considerable attention asks: can every positive integer occur as the number of the maximal subgroups ... More
A unified approach to local limit theorems in Gaussian spaces and the law of small numbersApr 20 2015Through a reformulation of the local limit theorem and law of small numbers, which is obtained by working in the spaces naturally associated to the limiting distributions, we discover a general and abstract framework for the investigation of that type ... More
Absolute continuity and Fokker-Planck equation for the law of Wong-Zakai approximations of Itô's stochastic differential equationsJan 09 2019We investigate the regularity of the law of Wong-Zakai-type approximations for It\^o stochastic differential equations. These approximations solve random differential equations where the diffusion coefficient is Wick-multiplied by the smoothed white noise. ... More
Model checking: the interval wayJan 12 2019Feb 11 2019[...] The most famous model checking (MC) techniques were developed from the late 80s, bearing in mind the well-known "point-based" temporal logics LTL and CTL. However, while the expressiveness of such logics is beyond doubt, there are some properties ... More
High-Redshift Galaxies: The Far-Infrared and Sub-Millimeter ViewSep 07 2000Oct 03 2000Observations at long wavelengths, in the wide interval from a few to 1000 micron, are essential to study diffuse media in galaxies, including all kinds of atomic, ionic and molecular gases and dust grains. Hence they are particularly suited to investigate ... More
Diboson physics at CDFSep 30 2009At the Fermilab Tevatron, the CDF detector is used to study diboson production in $p\bar{p}$ collisions at $\sqrt{s}$ = 1.96 TeV. We report recent diboson production measurements, limits on anomalous triple gauge couplings and latest results from semi-leptonic ... More
Linear magnetochiral effect in Weyl semimetalsJul 06 2016We suggest the possibility of a linear magnetochiral effect in time reversal breaking Weyl semimetals. Generically the magnetochiral effect consists in a simultaneous linear dependence of the magnetotransport coefficients with the magnetic field and a ... More
Reply to Hunter and Brown Discussion of Is there any support in the long term tide gauge data to the claims that parts of Sydney will be swamped by rising sea levels?, Coastal Engineering 2012;64:161-167, Coastal Engineering 2013;75:1-3Mar 22 2013Hunter and Brown try to demonstrate in their discussion of the long term tide gauge data published in my previous paper that the sea levels are accelerating when they are not. The sea levels are mostly oscillating and certainly not positively accelerating ... More
Espaces de configuration généralisés. Espaces topologiques $i$-acycliques. Suites spectrales "basiques"Sep 02 2016Sep 23 2016The generalized (ordered) configuration spaces associated to a topological space $X$ are the spaces $\Delta_{\leq\ell}X^{m}:=\{(x_1,\ldots,x_{m})\in X^{m}\mid\#\{x_1,\ldots,x_{m}\}\leq \ell\}$ and $\Delta_{\ell}X^{m}:=\Delta_{\leq\ell}X^{m}\setminus \Delta_{\leq\ell-1}$. ... More
On a new version of the Ito's formula for the stochastic heat equationApr 16 2007We derive an It\^o's-type formula for the one dimensional stochastic heat equation driven by a space-time white noise. The proof is based on elementary properties of the $\mathcal{S}$-transform and on the explicit representation of the solution process. ... More
Lattice models of disorder with orderDec 27 2003This paper describes the use of simple lattice models for studying the properties of structurally disordered systems like glasses and granulates. The models considered have crystalline states as ground states, finite connectivity, and are not subject ... More
The relationship between acquaintanceship and coauthorship in scientific collaboration networksAug 22 2011This article examines the relationship between acquaintanceship and coauthorship patterns in a multi-disciplinary, multi-institutional, geographically distributed research center. Two social networks are constructed and compared: a network of coauthorship, ... More
Symmetry of components, Liouville-type theorems and classification results for some nonlinear elliptic systemsJul 26 2013We prove the symmetry of components and some Liouville-type theorems for, possibly sign changing, entire distributional solutions to a family of nonlinear elliptic systems encompassing models arising in Bose-Einstein condensation and in nonlinear optics. ... More
Measurements of |Vus| and Searches for Violation of Lepton Universality and CPT in Tau Decays at BaBarDec 16 2010Dec 17 2010Using data collected with the BaBar detector at PEP-II at SLAC, we report on several tau lepton measurements that are used to determine the modulus of the Cabibbo-Kobayashi-Maskawa matrix element Vus, and to check the Standard Model predictions of lepton ... More
Search for Lepton-Flavor-Violating Tau Decays at the B-factoriesDec 16 2010Dec 17 2010Both the B-factories BaBar and Belle have ended data-taking and have mostly completed the data analysis aimed at searching Lepton Flavor Violation in Tau decays. No evidence of LFV in tau decays has been found yet. We review in the following the experimental ... More
Higgs Inflation at NNLO after the Boson DiscoveryAug 09 2013Nov 06 2013We obtain the bound on the Higgs and top masses to have Higgs inflation (where the Higgs field is non-minimally coupled to gravity) at full next-to-next-to-leading order (NNLO). Comparing the result obtained with the experimental values of the relevant ... More
Transitions in Dilaton Holography with Global or Local SymmetriesFeb 20 2013Mar 25 2013We study various transitions in dilaton holography, including those associated with the spontaneous breaking of a global (superfluid case) or local (superconductor case) U(1) symmetry in diverse dimensions d. By analyzing the thermodynamics of the dilaton-gravity ... More
Cronin effect in proton-nucleus collisions: a survey of theoretical modelsDec 11 2002Mar 21 2003I compare the available theoretical models that describe the Cronin effect on hadron and minijet production in proton-nucleus collisions, pointing out similarities and differences among them. The effect may be summarized by the value of two variables. ... More
Cronin effect from backward to forward rapidityMay 18 2004I discuss recent experimental data on the Cronin effect in deuteron-gold collisions at the top RHIC energy, in a pseudorapidity range [-2,3]. Two theoretical approaches are compared and contrasted: the pQCD-based Glauber-Eikonal model and Colour Glass ... More
Supersymmetric D-branes on SU(2) structure manifoldsMay 17 2007Oct 09 2007We employ generalized complex geometry to investigate supersymmetric embeddings of D-brane probes in a large class of SU(2) structure manifolds. This class includes the gravity dual of mass deformation and marginal beta deformation of N=4 SYM gauge theory. ... More
Ultraviolet Properties of Primeval Galaxies: Theoretical Models from Stellar Population SynthesisFeb 22 2002Feb 23 2002The ultraviolet luminosity evolution of star-forming galaxies is explored from the theoretical point of view, especially focusing on the theory of UV energetics in simple and composite stellar populations and its relationship to the star formation rate ... More
On rational solutions of multicomponent and matrix KP hierarchiesNov 05 2010We derive some rational solutions for the multicomponent and matrix KP hierarchies generalising an approach by Wilson. Connections with the multicomponent version of the KP/CM correspondence are discussed.
New no-scalar-hair theorem for black-holesJan 15 1996A new no-hair theorem is formulated which rules out a very large class of non-minimally coupled finite scalar dressing of an asymptotically flat, static, and spherically symmetric black-hole. The proof is very simple and based in a covariant method for ... More
Determination of |Vus| from the tau lepton branching fractionsNov 17 2014We determine the Cabibbo-Kobayashi-Maskawa matrix (CKM) element |Vus| in several different ways using updated preliminary HFAG averages for the tau lepton branching fractions and we compare the results with the determinations obtained from the kaon decays ... More
Gradings on symmetric composition algebrasSep 11 2008The group gradings on the symmetric composition algebras over arbitrary fields are classified. Applications of this result to gradings on the exceptional simple Lie algebras are considered too.
Espaces de configuration généralisés. Espaces topologiques $i$-acycliques. Suites spectrales "basiques"Sep 02 2016Jul 23 2018The generalized (ordered) configuration spaces associated to a topological space $X$ are the spaces $\Delta_{\leq\ell}X^{m}:=\{(x_1,\ldots,x_{m})\in X^{m}\mid\#\{x_1,\ldots,x_{m}\}\leq \ell\}$ and $\Delta_{\ell}X^{m}:=\Delta_{\leq\ell}X^{m}\setminus \Delta_{\leq\ell-1}$. ... More
Search for the SM Higgs decaying to a b-quark pair with ATLASFeb 01 2012Summary of first ATLAS results is given for the Standard Model Higgs boson in the mass range 110 < mH < 130 GeV, when produced in association with a W/Z boson and decaying to a pair of b-quarks. No evidence for the Higgs boson production is observed in ... More
Status and progress of the HFLAV-Tau group activitiesApr 23 2018Jun 02 2018We report the status and progress of the Heavy Flavour Averaging Group work on the global fit of tau lepton branching fractions, on the lepton universality tests and on the measurement of the Cabibbo-Kobayashi-Maskawa matrix element |Vus| using tau lepton ... More
The Beilinson complex and canonical rings of irregular surfacesOct 24 2006In the first part of the paper Beilinson's theorem on the bounded derived category of coherent sheaves on P^n is extended to weighted projective spaces in a rather explicit form. To this purpose the usual category of coherent sheaves is replaced by a ... More
On Bennequin type inequalities for links in tight contact 3-manifoldsJan 02 2018Mar 27 2018We prove that a version of the Thurston-Bennequin inequality holds for Legendrian and transverse links in a rational homology contact 3-sphere $(M,\xi)$, whenever $\xi$ is tight. More specifically, we show that the self-linking number of a transverse ... More
Efficient nonparametric inference for discretely observed compound Poisson processesDec 28 2015A compound Poisson process whose parameters are all unknown is observed at finitely many equispaced times. Efficient nonparametric estimators of the jump distribution and of the L\'evy measure are proposed. Under mild conditions a functional central limit ... More
Exponential complexity and ontological theories of quantum mechanicsNov 29 2007Jan 25 2008Ontological theories of quantum mechanics describe a single system by means of well-defined classical variables and attribute the quantum uncertainties to our ignorance about the underlying reality represented by these variables. We consider the general ... More
Impurity Scattering in a Bose-Einstein Condensate at finite temperatureApr 05 2002Sep 16 2011We consider the effects of finite temperature on the scattering of impurity atoms in a BoseEinstein condensate, showing that the scattering rate is enhanced by the thermal atoms. Collisions can increase or decrease the impurity energy. Below the Landau ... More
Compressing the hidden variable space of a qubitFeb 16 2010Feb 08 2011In previously exhibited hidden variable models of quantum state preparation and measurement, the number of continuous hidden variables describing the actual state of a single realization is never smaller than the quantum state manifold dimension. We introduce ... More
About a possible path towards the reverse engineering of quantum mechanicsNov 17 2011An out of the box intellectual path exploring the foundations of quantum mechanics is discussed in some detail, in order to clarify why a possibly different way to look at the relevant fundamental questions can be identified and can support further research. ... More
Thirty Years of Precision Electroweak PhysicsSep 06 2002Sep 19 2002We discuss the development of the theory of electroweak radiative corrections and its role in testing the Standard Model, predicting the top quark mass, constraining the Higgs boson mass, and searching for deviations that may signal the presence of new ... More
Considerations Concerning the QCD Corrections to $Δρ$Sep 13 1994Using recent results of Avdeev et al. and an expansion for $\mu_t/\mms$ ($M_t$ is the pole mass and $\mu_t\equiv \hat{m_t}(\mu_t)$ ), it is shown that when deltarho is expressed in terms of $\hat{m_t}^2(M_t)$, the QCD correction is only $(2-3)\times 10^{-3}$ ... More
How Strong is the Evidence for Electroweak Corrections Beyond the Running of $α$?Nov 18 1993The evidence for electroweak radiative corrections not contained in $\alpha(m_Z)$ is examined. At low energies there is very strong evidence in the analysis of the unitarity of the CKM matrix. At LEP and collider experiments the current direct signals ... More
Espaces de configuration généralisés. Espaces topologiques $i$-acycliques. Suites spectrales "basiques"Sep 02 2016Dec 04 2016The generalized (ordered) configuration spaces associated to a topological space $X$ are the spaces $\Delta_{\leq\ell}X^{m}:=\{(x_1,\ldots,x_{m})\in X^{m}\mid\#\{x_1,\ldots,x_{m}\}\leq \ell\}$ and $\Delta_{\ell}X^{m}:=\Delta_{\leq\ell}X^{m}\setminus \Delta_{\leq\ell-1}$. ... More
The promise of multi-band gravitational wave astronomyFeb 22 2016May 12 2016We show that the black hole binary (BHB) coalescence rates inferred from the advanced LIGO (aLIGO) detection of GW150914 imply an unexpectedly loud GW sky at milli-Hz frequencies accessible to the evolving Laser Interferometer Space Antenna (eLISA), with ... More
Limit Order Book and its modelling in terms of Gibbs Grand-Canonical EnsembleJan 24 2016Feb 27 2016In the domain of the so called Econophysics some attempts already have been made for applying the theory of Thermodynamics and Statistical Mechanics to economics and financial markets. In this paper a similar approach is made from a different perspective, ... More