Results for "Toshinori Matsui"

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Higgs inflation scenario in a radiative seesaw model and its testability at the ILCMay 22 2014The Higgs inflation scenario is an approach to realize the cosmic inflation, where the Higgs boson plays a role of the inflaton. In the minimal model, it would be difficult to satisfy theoretical constraints from vacuum stability and perturbative unitarity. ... More
Testability of the Higgs inflation scenario in a radiative seesaw modelMay 01 2013The Higgs inflation scenario is an approach to realize the inflation, in which the Higgs boson plays a role of the inflaton without introducing a new particle. We investigate a Higgs inflation scenario in the so-called radiative seesaw model proposed ... More
Neutrino Mass and Dark Matter from Gauged B$-$L BreakingMay 29 2015We discuss a new radiative seesaw model with the gauged B$-$L symmetry which is spontaneously broken. We improve the previous model by using the anomaly-free condition without introducing too many fermions. In our model, dark matter, tiny neutrino masses ... More
Gravitational waves as a probe of extended scalar sectors with the first order electroweak phase transitionSep 28 2015Dec 13 2015We discuss spectra of gravitational waves which are originated by the strongly first order phase transition at the electroweak symmetry breaking, which is required for a successful scenario of electroweak baryogenesis. Such spectra are numerically evaluated ... More
Loop Suppression of Dirac Neutrino Mass in the Neutrinophilic Two Higgs Doublet ModelMay 20 2013Nov 10 2013We extend the scalar sector of the neutrinophilic two Higgs doublet model, where small masses of Dirac neutrinos are obtained via a small vacuum expectation value v_nu of the neutrinophilic SU(2)_L-doublet scalar field which has a Yukawa interaction with ... More
Strong First Order EWPT and Strong Gravitational Waves in $Z_3$-symmetric Singlet Scalar ExtensionJun 29 2017Jul 09 2017The nature of electroweak (EW) phase transition (PT) is of great importance. It may give a clue to the origin of baryon asymmetry if EWPT is strong first order. Although it is second order within the standard model (SM), a great many extensions of the ... More
Higgs inflation in a radiative seesaw modelNov 19 2012Apr 13 2013We investigate a simple model to explain inflation, neutrino masses and dark matter simultaneously. This is based on the so-called radiative seesaw model proposed by Ma in order to explain neutrino masses and dark matter by introducing a $Z_2$-odd isospin ... More
Neutrino Mass and Dark Matter from Gauged $U(1)_{B-L}$ BreakingMay 08 2014Jul 09 2014We propose a new model where the Dirac mass term for neutrinos, the Majorana mass term for right-handed neutrinos, and the other new fermion masses arise via the spontaneous breakdown of the $U(1)_{B-L}$ gauge symmetry. The anomaly-free condition gives ... More
Algorithms for integrals of holonomic functions over domains defined by polynomial inequalitiesAug 24 2011Oct 29 2011We present an algorithm for computing a holonomic system for a definite integral of a holonomic function over a domain defined by polynomial inequalities. If the integrand satisfies a holonomic difference-differential system including parameters, then ... More
Local rings with a self-dual maximal idealDec 26 2018Let R be a Cohen-Macaulay local ring possessing a canonical module. In this paper we consider when the maximal ideal of R is self-dual, i.e. it is isomorphic to its canonical dual as an R-module. local rings satisfying this condition are called Teter ... More
Localization, local cohomology, and the b-function of a D-module with respect to a polynomialSep 15 2016Given a $D$-module $M$ generated by a single element, and a polynomial $f$, one can construct several $D$-modules attached to $M$ and $f$ and can define the notion of the (generalized) $b$-function following M. Kashiwara. These modules are closely related ... More
An algorithm to compute the differential equations for the logarithm of a polynomialJan 16 2012We present an algorithm to compute the annihilator of (i.e., the linear differential equations for) the logarithm of a polynomial in the ring of differential operators with polynomial coefficients. The algorithm consists of differentiation with respect ... More
A study of topological vertexing for heavy quark taggingFeb 09 2001We compare heavy quark tagging and anti-tagging efficiencies for vertex detectors with different inner raddi using the topological vertex technique developed at the SLC/SLD experiment. Charm tagging benefits by going to very small inner radii.
Lepton Flavor Violating Decays - Review & OutlookMay 30 2006May 31 2006Here I review the status and prospects of experimental investigations into lepton flavor violation (LFV) in charged leptons. Rare LFV processes are naturally expected to occur through loops of TeV scale particles predicted by supersymmetric theories or ... More
Synergy between measurements of the gravitational wave and the triple Higgs coupling in probing first order phase transitionApr 07 2016Jul 20 2016Probing the Higgs potential and new physics behind the electroweak symmetry breaking is one of the most important issues of particle physics. In particular, nature of electroweak phase transition is essential for understanding physics at the early Universe, ... More
Gravitational waves and Higgs boson couplings for exploring first order phase transition in the model with a singlet scalar fieldSep 01 2016We calculate the spectrum of gravitational waves originated from strongly first order electroweak phase transition in the extended Higgs model with a real singlet field. In order to calculate the bubble nucleation rate, we perform a two-field analysis ... More
Indirect reach of heavy MSSM Higgs bosons by precision measurements at future lepton collidersMay 14 2015Sep 11 2015In the Minimal Supersymmetric Standard Model (MSSM), the bottom Yukawa coupling of the Higgs boson can considerably deviate from its Standard Model prediction due to non-decoupling effects. We point out that the ratio of the Higgs boson decay branching ... More
Gravitational waves from first order electroweak phase transition in models with the $U(1)_X^{}$ gauge symmetryFeb 08 2018We consider a standard model extension equipped with a dark sector where the $U(1)_X^{}$ Abelian gauge symmetry is spontaneously broken by the dark Higgs mechanism. In this framework, we investigate patterns of the electroweak phase transition as well ... More
An algorithm for de Rham cohomology groups of the complement of an affine variety via D-module computationJan 26 1998We give an algorithm to compute the following cohomology groups on $U = \C^n \setminus V(f)$ for any non-zero polynomial $f \in \Q[x_1, ..., x_n]$; 1. $H^k(U, \C_U)$, $\C_U$ is the constant sheaf on $U$ with stalk $\C$. 2. $H^k(U, \Vsc)$, $\Vsc$ is a ... More
LCD ROOT Simulation and Analysis ToolsFeb 07 2001The North American Linear Collider Detector group has developed a simulation program package based on the ROOT system. The package consists of Fast simulation, the reconstruction of the Full simulated data, and physics analysis utilities.
Algorithm for computing local Bernstein-Sato idealsJun 30 2008Given $p$ polynomials of $n$ variables over a field $k$ of characteristic 0 and a point $a \in k^n$, we propose an algorithm computing the local Bernstein-Sato ideal at $a$. Moreover with the same algorithm we compute a constructible stratification of ... More
A True Random Number Generator Method Embedded in Wireless Communication SystemsNov 27 2018Mar 17 2019To increase the number of wireless devices, e.g., mobile or IoT terminals, cryptosystems are essential for secure communications. In this regard, random number generation is crucial because the appropriate function of cryptosystems relies on it to work ... More
Boundary bound states in the SUSY sine-Gordon model with Dirichlet boundary conditionsMay 04 2012We analyze the ground state structure of the supersymmetric sine-Gordon model via the lattice regularization. The nonlinear integral equations are derived for any values of the boundary parameters by the analytic continuation and showed three different ... More
The structure of preenvelopes with respect to maximal Cohen-Macaulay modulesApr 30 2015This paper studies the structure of special preenvelopes and envelopes with respect to maximal Cohen-Macaulay modules. We investigate the structure of them in terms of their kernels and cokernels. Moreover, using this result, we also study the structure ... More
Spinon excitations in the spin-1 XXZ chain and hidden supersymmetryJul 14 2016Sep 20 2016We study spinon excitations of the integrable spin-1 (Fateev-Zamolodchikov; FZ) chain and their relation to the hidden supersymmetry. Using the notion of the supercharges earlier introduced to the spin chains, which change the system length by one, we ... More
Dynamical supersymmetry on the XXX spin chainApr 22 2015Apr 30 2015We show the XXX model has the N = 2 dynamical supersymmetry. Using the supercharges defined by the Jordan-Wigner fermions, it was found that the anti-commutation relation of the supercharges gives the Hamiltonian of the XXX model with magnetic field. ... More
Multi-state asymmetric simple exclusion processesNov 29 2013Dec 08 2014It is known that the Markov matrix of the asymmetric simple exclusion process (ASEP) is invariant under the Uq(sl2) algebra. This is the result of the fact that the Markov matrix of the ASEP coincides with the generator of the Temperley-Lieb (TL) algebra, ... More
Log-convexity and the cycle index polynomials with relation to compound Poisson distributionsSep 22 2016We extend the exponential formula by Bender and Canfield (1996), which relates log-concavity and the cycle index polynomials. The extension clarifies the log-convexity relation. The proof is by noticing the property of a compound Poisson distribution ... More
Quadratic regression for functional response modelsFeb 07 2017Jul 02 2018We consider the problem of constructing a regression model with a functional predictor and a functional response. We extend the functional linear model to the quadratic model, where the quadratic term also takes the interaction between the argument of ... More
A characterization of ARMA and Fractional ARIMA models with infinitely divisible innovationsMar 25 2007Apr 27 2015The object of this paper is to study the asymptotic dependence structure of the linear time series models with infinitely divisible innovations by the use of their characteristic functions. Autoregressive moving-average (ARMA) models and fractional autoregressive ... More
Classifying dense (co)resolving subcategories of exact categories via Grothendieck groupsAug 02 2016Nov 06 2016Classification problems of subcategories have been deeply considered so far. In this paper, we discuss classifying dense (co)resolving subcategories of exact categories via their Grothendieck groups. This study is motivated by the classification of dense ... More
Boundary conditions for the Stokes problem and a pressure-Poisson problemDec 26 2018We consider a boundary value problem for the stationary Stokes problem and the corresponding pressure-Poisson equation. We propose a new formulation for the pressure-Poisson problem with an appropriate additional boundary condition. We establish error ... More
Connectedness of the Balmer spectra of right bounded derived categoriesMay 12 2017By virtue of Balmer's celebrated theorem, the classification of thick tensor ideals of a tensor triangulated category $\T$ is equivalent to the topological structure of its Balmer spectrum $\spc \T$. Motivated by this theorem, we discuss connectedness ... More
Boundary effects on the supersymmetric sine-Gordon model through light-cone lattice approachApr 15 2014Jun 19 2014We discussed subspaces of the N=1 supersymmetric sine-Gordon model with Dirichlet boundaries through light-cone lattice regularization. In this paper, we showed, unlike the periodic boundary case, both of Neveu-Schwarz (NS) and Ramond (R) sectors of a ... More
Boundary effects on the lattice/continuum correspondence: the spin-1/2 XXZ chain and the sine-Gordon modelDec 08 2014We derived the corresponding boundary condition on Fermi fields to the spin-1/2 Heisenberg chain with boundary magnetic fields. In order to obtain the correct boundary condition from the variation of the action at the edges, we carefully treat the oscillating ... More
Spacetime Instability and the Problems with Low Energy Quantum GravityJan 25 2019Feb 06 2019In this paper we discuss spacetime instability problems in effective field theories of the quantum gravity (QG). The effective action of the gravity requires higher-derivative curvature terms $R^{2}, { R }_{ \mu \nu }{ R }^{ \mu \nu }, R_{\mu\nu\kappa\lambda} ... More
Prediction of components in random sumsApr 27 2015Jul 10 2015We consider predictions of the random number and the magnitude of each iid component in a random sum based on its distributional structure, where only a total value of the sum is available and where iid random components are non-negative. The problem ... More
Singular equivalences of commutative noetherian rings and reconstruction of singular lociSep 22 2017May 14 2018Two left noetherian rings $R$ and $S$ are said to be {\it singularly equivalent} if their singularity categories are equivalent as triangulated categories. The aim of this paper is to give a necessary condition for two commutative noetherian rings to ... More
Decoding a Class of Affine Variety Codes with Fast DFTSep 29 2012An efficient procedure for error-value calculations based on fast discrete Fourier transforms (DFT) in conjunction with Berlekamp-Massey-Sakata algorithm for a class of affine variety codes is proposed. Our procedure is achieved by multidimensional DFT ... More
Asymptotics of maximum likelihood estimation for stable law with $(M)$ parameterizationJan 27 2019Feb 04 2019Asymptotics of maximum likelihood estimation for $\alpha$-stable law are analytically investigated with $(M)$ parameterization. The consistency and asymptotic normality are shown on the interior of the whole parameter space. Although these asymptotics ... More
BEC of Free Bosons on NetworksSep 02 2005We consider free Bosons hopping on a network(infinite graph). The condition for Bose-Einstein condensation is given in terms of the random walk on a graph. In case of periodic lattices, we also consider Boson moving in an external periodic potential and ... More
On Spectral Gap,U(1) Symmetry and Split Property in Quantum Spin ChainsAug 11 2008We consider a class of ground states for quantum spin chains on an integer lattice. First we show that presence of the spectral gap between the ground state energy and the rest of spectrum implies the split property of certain subsystems.As a corollary, ... More
Fisher Information Matrix of General Stable Distributions Close to the Normal DistributionFeb 26 2005We investigate behavior of the Fisher information matrix of general stable distributions. DuMouchel (1975, 1983) proved that the Fisher information of characteristic exponent \alpha diverges to infinity as \alpha approaches 2. Nagaev and Shkol'nik (1988) ... More
Selection of variables and decision boundaries for functional data via bi-level selectionFeb 07 2017Feb 13 2017Sparsity-inducing penalties are useful tools for variable selection and they are also effective for regression settings where the data are functions. We consider the problem of selecting not only variables but also decision boundaries in logistic regression ... More
Arrival times of Cox process with independent increment with application to prediction problemsJul 01 2017Dec 06 2017Properties of arrival times are studied for a Cox process with independent (and stationary) increments. Under a reasonable setting the directing random measure is shown to take over independent (and stationary) increments of the process, from which the ... More
Classifying dense (co)resolving subcategories of exact categories via Grothendieck groupsAug 02 2016Classification problems of subcategories have been deeply considered so far. In this paper, we discuss classifying dense (co)resolving subcategories of exact categories via their Grothendieck groups. This study is motivated by the classification of dense ... More
Lemma for Linear Feedback Shift Registers and DFTs Applied to Affine Variety CodesNov 20 2012Jan 20 2014In this paper, we establish a lemma in algebraic coding theory that frequently appears in the encoding and decoding of, e.g., Reed-Solomon codes, algebraic geometry codes, and affine variety codes. Our lemma corresponds to the non-systematic encoding ... More
Fast Erasure-and-Error Decoding and Systematic Encoding of a Class of Affine Variety CodesAug 27 2012In this paper, a lemma in algebraic coding theory is established, which is frequently appeared in the encoding and decoding for algebraic codes such as Reed-Solomon codes and algebraic geometry codes. This lemma states that two vector spaces, one corresponds ... More
Prediction in a non-homogeneous Poisson cluster modelJul 19 2013Nov 28 2013A non-homogeneous Poisson cluster model is studied, motivated by insurance applications. The Poisson center process which expresses arrival times of claims, triggers off cluster member processes which correspond to number or amount of payments. The cluster ... More
Boundedness of Entanglement Entropy,and Split Property of Quantum Spin ChainsSep 27 2011We show the boundedness of entanglement entropy for (bipartite) pure states of quantum spin chains implies split property of subsystems. As a corollary the infinite volume ground states for 1-dim spin chains with the spectral gap between the ground state ... More
Asymptotics of maximum likelihood estimation for stable law with continuous parameterizationJan 27 2019Feb 28 2019Asymptotics of maximum likelihood estimation for $\alpha$-stable law are analytically investigated with a continuous parameterization. The consistency and asymptotic normality are shown on the interior of the whole parameter space. Although these asymptotics ... More
The final SLD results for ALR and AleptonFeb 09 2001We present the final measurements of the left-right cross-section asymmetry (ALR) for Z boson production by e+e- collisions and Z boson-lepton coupling asymmetry parameters Ae, Amu, and Atau in leptonic Z decays with the SLD detector at the SLAC Linear ... More
Burch ideals and Burch ringsMay 07 2019We introduce the notion of Burch ideals and Burch rings. They are easy to define, and can be viewed as generalization of many well-known concepts, for example integrally closed ideals of finite colength and Cohen--Macaulay rings of minimal multiplicity. ... More
On the evaluation of form factors and correlation functions for the integrable spin-s XXZ chains via the fusion methodMar 22 2011Revising the derivation of the previous papers, for the integrable spin-$s$ XXZ chain we express any form factor in terms of a single sum over scalar products of the spin-1/2 XXZ chain. With the revised method we express the spin-$s$ XXZ correlation function ... More
Correlation functions of the integrable higher-spin XXX and XXZ spin chains through the fusion methodJul 03 2009Nov 19 2009For the integrable higher-spin XXX and XXZ spin chains we present multiple-integral representations for the correlation function of an arbitrary product of Hermitian elementary matrices in the massless ground state. We give a formula expressing it by ... More
Phase coexistence phenomena in an extreme case of the misanthrope process with open boundariesMay 03 2016Jul 27 2016The misanthrope process is a class of stochastic interacting particle systems, generalizing the simple exclusion process. It allows each site of the lattice to accommodate more than one particle. We consider a special case of the one dimensional misanthrope ... More
Gravitational relaxation of electroweak hierarchy problemAug 31 2016The current status of the LHC experiments has aggravated the electroweak hierarchy problem as severe as the cosmological constant problem. Therefore, recently, theoretically different approaches to the electroweak hierarchy problem have been explored. ... More
Quark-hadron phase transition in a three flavor PNJL modelSep 30 2013We study the quark-hadron phase transition by using a three flavor Nambu-Jona-Lasinio model with the Polyakov loop at zero chemical potential, extending our previous work with two flavor model. We show that the equation of state at low temperatures is ... More
Integral representations of one dimensional projections for multivariate stable densitiesAug 23 2006We consider the numerical evaluation of one dimensional projections of general multivariate stable densities introduced by Abdul-Hamid and Nolan (1998). In their approach higher order derivatives of one dimensional densities are used, which seem to be ... More
Gravitational wave background from kink-kink collisions on infinite cosmic stringsFeb 25 2019We calculate the power spectrum of the stochastic gravitational wave (GW) background expected from kink-kink collisions on infinite cosmic strings. Intersections in the cosmic string network continuously generate kinks, which emit GW bursts by their propagation ... More
Microlocal study of Lefschetz fixed point formulas for higher-dimensional fixed point setsDec 24 2008We introduce new Lagrangian cycles which encode local contributions of Lefschetz numbers of constructible sheaves into geometric objects. We study their functorial properties and apply them to Lefschetz fixed point formulas with higher-dimensional fixed ... More
The Ξ_Q - Ξ_Q' Mixing and Heavy Baryon MassesMay 13 1996Sep 26 1996We examine the $\Xi_Q - \Xi'_Q$ mixing and heavy baryon masses in the heavy quark effective theory with the $\mq$ corrections. In the conventional baryon assignment, we obtain the mixing angle $\cos^2 \theta = 0.87\pm 0.03$ in virtue of the Gell-Mann-Okubo ... More
A geometric degree formula for $A$-discriminants and Euler obstructions of toric varietiesJul 20 2008Dec 14 2008We give explicit formulas for the dimensions and the degrees of $A$-discriminant varieties introduced by Gelfand-Kapranov-Zelevinsky. Our formulas can be applied also to the case where the $A$-discriminant varieties are higher-codimensional and their ... More
The extremogram and the cross-extremogram for a bivariate GARCH(1,1) processMay 20 2015In this paper, we derive some asymptotic theory for the extremogram and cross-extremogram of a bivariate GARCH(1,1) process. We show that the tails of the components of a bivariate GARCH(1,1) process may exhibit power law behavior but, depending on the ... More
Construction of spectra of triangulated categories without tensor structure and applications to commutative ringsNov 15 2018In this paper, as an analogue of the spectrum of a tensor triangulated category introduced by Balmer, we define a spectrum of a triangulated category which does not necessarily admit a tensor structure. We apply it for some triangulated categories associated ... More
Quark-hadron phase transition in a three flavor PNJL model for interacting quarksOct 18 2013We extend our previous study of the quark-hadron phase transition at finite temperatures with zero net baryon density by two flavor Nambu-Jona-Lasinio model with Polyakov loop to the three flavor case in a scheme which incorporates flavor nonet pseudo ... More
An Equivariant Liapunov Stability Test and the Energy-Momentum-Casimir MethodJul 12 2001Feb 11 2002We present an equivariant Liapunov stability criterion for dynamical systems with symmetry. This result yields a simple proof of the energy-momentum-Casimir stability analysis of relative equilibria of equivariant Hamiltonian systems.
Algebraic aspects of the correlation functions of the integrable higher-spin XXZ spin chains with arbitrary entriesMay 06 2010We discuss some fundamental properties of the XXZ spin chain, which are important in the algebraic Bethe-ansatz derivation for the multiple-integral representations of the spin-s XXZ correlation function with an arbitrary product of elementary matrices. ... More
Asymptotic analysis of an $\varepsilon$-Stokes problem connecting Stokes and pressure-Poisson problemsDec 07 2017In this Note, we prepare an $\varepsilon$-Stokes problem connecting the Stokes problem and the corresponding pressure-Poisson equation using one parameter $\varepsilon>0$. We prove that the solution to the $\varepsilon$-Stokes problem, convergences as ... More
Amino acid precursors from a simulated lower atmosphere of Titan: Experiments of cosmic ray energy source with 13 C- and 18 O-stable isotope probing mass spectrometrySep 24 2013Sep 25 2013The organic haze of aerosols that shrouds the Saturnian moon Titan has previously been studied by both observations and laboratory simulation experiments. Here we report the abiotic formation of amino acid precursors in complex organic molecules during ... More
A Disk Galaxy of Old Stars at z ~ 2.5Dec 19 2003We describe observations of a galaxy in the field of the $z=2.483$ radio galaxy 4C 23.56, photometrically selected to have a spectral-energy distribution consistent with an old stellar population at the redshift of the radio galaxy. Exploration of redshift--stellar-population-reddening ... More
Properties of powers of functions satisfying second-order linear differential equations with applications to statisticsMay 18 2014We derive properties of powers of a function satisfying a second-order linear differential equation. In particular we prove that the n-th power of the function satisfies an (n+1)-th order differential equation and give a simple method for obtaining the ... More
A Localization Algorithm for $D$-modulesNov 06 1998Jul 15 1999We present a method to compute the holonomic extension of a $D$-module from a Zariski open set in affine space to the whole space. A particular application is the localization of coherent $D$-modules which are holonomic on the complement of an affine ... More
Sympatric Speciation in a Simple Food WebFeb 11 2005Observations of the evolution of species groups in nature, such as well recognized Galapagos finches, have motivated much theoretical research aimed at understanding the processes associated with such radiations. The Penna model is one such model and ... More
Burch ideals and Burch ringsMay 07 2019May 09 2019We introduce the notion of Burch ideals and Burch rings. They are easy to define, and can be viewed as generalization of many well-known concepts, for example integrally closed ideals of finite colength and Cohen--Macaulay rings of minimal multiplicity. ... More
A strategy to search for an inner binary black hole from the motion of the tertiary star I: a perturbative analytic approach to a coplanar and near-circular three-body system and its application to 2M05215658+4359220May 17 2019There are several on-going projects to detect a number of stars orbiting around invisible objects. A fraction of them may be a triple system consisting of an inner binary black hole (BBH) and an outer orbiting star. In this paper, we propose a methodology ... More
Euler characteristic reciprocity for chromatic, flow and order polynomialsJan 03 2016Apr 06 2017The Euler characteristic of a semialgebraic set can be considered as a generalization of the cardinality of a finite set. An advantage of semialgebraic sets is that we can define "negative sets" to be the sets with negative Euler characteristics. Applying ... More
Higgs vacuum metastability in primordial inflation, preheating, and reheatingFeb 05 2016Mar 02 2016Current measurements of the Higgs boson mass and top Yukawa coupling suggest that the effective Higgs potential develops an instability below the Planck scale. If the energy scale of inflation is as high as the GUT scale, inflationary quantum fluctuations ... More
Form factors of integrable higher-spin XXZ chains and the affine quantum-group symmetryJul 11 2008Sep 04 2008We derive exactly scalar products and form factors for integrable higher-spin XXZ chains through the algebraic Bethe-ansatz method. Here spin values are arbitrary and different spins can be mixed. We show the affine quantum-group symmetry, $U_q(\hat{sl_2})$, ... More
Higgs vacuum metastability in primordial inflation, preheating, and reheatingFeb 05 2016Nov 16 2016Current measurements of the Higgs boson mass and top Yukawa coupling suggest that the effective Higgs potential develops an instability below the Planck scale. If the energy scale of inflation is as high as the GUT scale, inflationary quantum fluctuations ... More
Molecular dynamics investigation of dislocation pinning by a nanovoid in copperDec 27 2004Jun 14 2005Interactions between an edge dislocation and a void in copper are investigated by means of molecular dynamics simulation. The depinning stresses of the leading partial and of the trailing partial show qualitatively different behaviors. The depinning stress ... More
Eternal Inflation and Swampland ConjecturesJul 31 2018Jan 21 2019We study if eternal inflation is realized while satisfying the recently proposed string Swampland criteria concerning the range of scalar field excursion, $|\Delta \phi| < \mathcal{D} \cdot M_{\rm P}$, and the potential gradient, $|\nabla V| > c \cdot ... More
Approximation Algorithm for Cycle-Star Hub Network Design Problems and Cycle-Metric Labeling ProblemsDec 09 2016We consider a single allocation hub-and-spoke network design problem which allocates each non-hub node to exactly one of given hub nodes so as to minimize the total transportation cost. This paper deals with a case in which the hubs are located in a cycle, ... More
Quark-Hadron Phase Transition in the PNJL model for interacting quarksDec 26 2012Jan 29 2013We study quark-hadron phase transition at finite temperature with zero net baryon density by the Nambu-Jona-Lasinio model for interacting quarks in uniform background temporal color gauge fields. At low temperatures, unphysical thermal quark-antiquark ... More
Distortion of the HBT images by meson cloudsMay 20 2009Sep 11 2009We study the effects of mesonic final state interactions on the Hanbury Brown and Twiss (HBT) intensity interferometry for mesons in ultra-relativistic heavy ion collisions. Modification of the one-body amplitude of emitted mesons while going through ... More
Goodness-of-Fit Tests for Symmetric Stable Distributions -- Empirical Characteristic Function ApproachFeb 16 2006We consider goodness-of-fit tests of symmetric stable distributions based on weighted integrals of the squared distance between the empirical characteristic function of the standardized data and the characteristic function of the standard symmetric stable ... More
Kakutani Dichotomy on Free StatesMar 15 2012Two quasi-free states on a CAR or CCR algebra are shown to generate quasi-equivalent representations unless they are disjoint.
Motivic Milnor fibers and Jordan normal forms of Milnor monodromiesFeb 23 2012By calculating the equivariant mixed Hodge numbers of motivic Milnor fibers introduced by Denef-Loeser, we obtain explicit formulas for the Jordan normal forms of Milnor monodromies. The numbers of the Jordan blocks will be described by the Newton polyhedron ... More
Some improvements in numerical evaluation of symmetric stable density and its derivativesAug 24 2004Aug 25 2004We propose improvements in numerical evaluation of symmetric stable density and its partial derivatives with respect to the parameters. They are useful for more reliable evaluation of maximum likelihood estimator and its standard error. Numerical values ... More
Singularity categories and singular equivalences for resolving subcategoriesDec 27 2014May 27 2016Let $\X$ be a resolving subcategory of an abelian category. In this paper we investigate the singularity category $\ds(\underline\X)=\db(\mod\underline\X)/\kb(\proj(\mod\underline\X))$ of the stable category $\underline\X$ of $\X$. We consider when the ... More
A preliminary measurement of the gluon splitting rate into $b\bar{b}$ pairs in hadronic $Z^0$ decaysMay 28 1999We present a measurement of the rate of gluon splitting into bottom quarks, $g \to b\bar{b}$, in hadronic $Z^0$ decays collected by SLD from 1996 to 1998. The analysis was performed by looking for secondary bottom production in 4-jet events of any primary ... More
Burch ideals and Burch ringsMay 07 2019Jun 13 2019We introduce the notion of Burch ideals and Burch rings. They are easy to define, and can be viewed as generalization of many well-known concepts, for example integrally closed ideals of finite colength and Cohen--Macaulay rings of minimal multiplicity. ... More
Inverse-free Berlekamp-Massey-Sakata Algorithm and Small Decoders for Algebraic-Geometric CodesMay 02 2007This paper proposes a novel algorithm for finding error-locators of algebraic-geometric codes that can eliminate the division-calculations of finite fields from the Berlekamp-Massey-Sakata algorithm. This inverse-free algorithm provides full performance ... More
Thick tensor ideals of right bounded derived categoriesNov 09 2016Let R be a commutative noetherian ring. Denote by D^-(R) the derived category of cochain complexes X of finitely generated R-modules with H^i(X)=0 for i>>0. Then D^-(R) has the structure of a tensor triangulated category with tensor product \otimes_R^L ... More
Fractional absolute moments of heavy tailed distributionsJan 21 2013Jun 03 2014Several convenient methods for calculation of fractional absolute moments are given with application to heavy tailed distributions. We use techniques of fractional differentiation to obtain formulae for $E[|X-\mu|^\gamma]$ with $1<\gamma<2$ and $\mu\in\mathbb{R}$. ... More
Monodromy zeta functions at infinity, Newton polyhedra and constructible sheavesSep 18 2008Dec 28 2009By using sheaf-theoretical methods such as constructible sheaves, we generalize the formula of Libgober-Sperber concerning the zeta functions of monodromy at infinity of polynomial maps into various directions. In particular, some formulas for the zeta ... More
Tail indices for AX+B recursion with triangular matricesAug 29 2018Multivariate stochastic recurrence equations (SREs) are investigated when coefficients are triangular matrices. If coefficient matrices of SREs have all strictly positive elements, the Kesten's classical result yields solutions with regularly varying ... More
Generalized fractional Ornstein-Uhlenbeck processesJul 14 2008We introduce an extended version of the fractional Ornstein-Uhlenbeck (FOU) process where the integrand is replaced by the exponential of an independent L\'evy process. We call the process the generalized fractional Ornstein-Uhlenbeck (GFOU) process. ... More
Electroweak Vacuum Instability and Renormalized Higgs Field Vacuum Fluctuations in the Inflationary UniverseJul 27 2016In this work, we investigated the electroweak vacuum instability during or after inflation. In the inflationary Universe, i.e., de Sitter space, the vacuum field fluctuations $\left< {\delta \phi }^{ 2 } \right>$ enlarge in proportion to the Hubble scale ... More
Higgs sector extension of the neutrino minimal standard model with thermal freeze-in production mechanismMar 04 2015Jul 07 2016The neutrino minimal Standard Model ({\nu}MSM) is the minimum extension of the standard model. In this model, the Dodelson-Widrow mechanism (DW) produces keV sterile neutrino dark matter (DM) and the degenerate GeV heavy Majorana neutrinos lead to leptogenesis. ... More