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Lepton Portal Dark MatterFeb 26 2014We study a class of simplified dark matter models in which dark matter couples directly with a mediator and a charged lepton. This class of Lepton Portal dark matter models has very rich phenomenology: it has loop generated dark matter electromagnetic ... More

Chromo-Rayleigh Interactions of Dark MatterJun 23 2015For a wide range of models, dark matter can interact with QCD gluons via chromo-Rayleigh interactions. We point out that the Large Hadron Collider (LHC), as a gluon machine, provides a superb probe of such interactions. In this paper, we introduce simplified ... More

Weakly Interacting Stable PionsApr 30 2010Dec 24 2010An unbroken discrete symmetry, analogous to G-parity in QCD, exists in standard model extensions with vector-like coupling of electroweak SU(2) to "hidden sector" fermions that are confined by a strong gauge force. For an irreducible SU(2) representation ... More

Dips at CollidersJul 23 2014Aug 14 2014We categorize new physics signatures that manifest themselves as a "dip" structure at colliders. One potential way to realize a dip is to require interactions to be zero when all particles are mass on-shell, but not if one or more are mass off-shell. ... More

Collider Tests of the Renormalizable Coloron ModelFeb 08 2018The coloron, a massive version of the gluon present in gauge extensions of QCD, has been searched for at the LHC as a dijet or top quark pair resonance. We point out that in the Renormalizable Coloron Model (ReCoM) with a minimal field content to break ... More

Dark Quark NuggetsOct 10 2018Nov 19 2018"Dark quark nuggets", a lump of dark quark matter, can be produced in the early universe for a wide range of confining gauge theories and serve as a macroscopic dark matter candidate. The two necessary conditions, a nonzero dark baryon number asymmetry ... More

Dilaton-assisted Dark MatterSep 08 2009Jan 07 2010A dilaton could be the dominant messenger between Standard Model fields and dark matter. The measured dark matter relic abundance relates the dark matter mass and spin to the conformal breaking scale. The dark matter-nucleon spin-independent cross section ... More

Quark Mass Ratios and Mixing Angles from SU(3) Family Gauge SymmetryMar 14 2006Mar 24 2006We explore a framework for the computation of quark mass ratios and CKM mixing angles based on an SU(3) family gauge symmetry. The four ratios md/mb, ms/mb, mu/mt, and mc/mt can be fit at one-loop in the family gauge interaction. The same is true of the ... More

How Much Frequency Can Be Reused in 5G Cellular Networks---A Matrix Graph ModelJan 19 2014Apr 11 2014The 5th Generation cellular network may have the key feature of smaller cell size and denser resource employment, resulted from diminishing resource and increasing communication demands. However, small cell may result in high interference between cells. ... More

Geometric Compatibility of IceCube TeV-PeV Neutrino Excess and its Galactic Dark Matter OriginNov 22 2013We perform a geometric analysis for the sky map of the IceCube TeV-PeV neutrino excess and test its compatibility with the sky map of decaying dark matter signals in our galaxy. Using both Kolmogorov-Smirnov and the likelihood-ratio tests, we have found ... More

Hydrogen Axion Star: Metallic Hydrogen Bound to a QCD Axion BECDec 01 2016As a cold dark matter candidate, the QCD axion may form Bose-Einstein condensates, called axion stars, with masses around $10^{-11}\,M_{\odot}$. In this paper, we point out that a brand new astrophysical object, a Hydrogen Axion Star (HAS), may well be ... More

Three-dimensional non-isothermal phase-field modeling of microstructure evolution during selective laser sinteringFeb 12 2019Predicting the microstructure during selective laser sintering (SLS) is of great interests, which can compliment the current time and cost expensive trial-and-error principle with an efficient computational design tool. However, it still remains a great ... More

A Combined Chandra and LAMOST Study of Stellar ActivityDec 14 2018We probed stellar X-ray activity over a wide range of stellar parameters, using {\it Chandra} and LAMOST data. We measured the X-ray-to-bolometric luminosity ratio ($R_X = L_X/L_{\rm bol}$) for 484 main-sequence stars, and found a bimodal distribution ... More

Mini Little Higgs and Dark MatterJan 10 2008Aug 25 2008We construct a little Higgs model with the most minimal extension of the standard model gauge group by an extra U(1) gauge symmetry. For specific charge assignments of scalars, an approximate U(3) global symmetry appears in the cutoff-squared scalar mass ... More

Effect of interfacial strain on spin injection and spin polarization of Co2CrAl/NaNbO3/Co2CrAl magnetic tunneling junctionApr 03 2012First-principles calculations were carried out to investigate interfacial strain effects on spin injection and spin polarization of a magnetic tunnel junction consisting of half-metallic full-Heusler alloy Co2CrAl and ferroelectric perovskite NaNbO3. ... More

Origin of the X-rays and Possible GeV-TeV Emission from the Western Hot Spot Of Pictor AMay 30 2009Pictor A is a nearby Fanaroff-Riley class II (FR II) radio galaxy with a bright hot spot, the western hot spot. Observation of high polarization in the optical emission of the hot spot indicates that the optical emission could be synchrotron radiation ... More

A novel energy-based phase field model for ferrodroplet deformation and breakup in a uniform magnetic fieldMar 30 2017Oct 30 2017In this paper, we propose a novel, thermodynamically consistent phase field model to simulate the deformation and breakup of a ferrodroplet that is immersed in a viscous medium and subject to an applied uniform magnetic field. Instead of using the magnetic ... More

Phase-field modeling of non-isothermal grain coalescence in the unconventional sintering techniquesJun 07 2018A thermodynamically consistent phase-field model is developed to study the non-isothermal grain coalescence during the sintering process, with a potential application to the simulation in unconventional sintering techniques, e.g. spark plasma sintering, ... More

LHC Predictions from a Tevatron Anomaly in the Top Quark Forward-Backward AsymmetryJan 27 2011We examine the implications of the recent CDF measurement of the top-quark forward-backward asymmetry, focusing on a scenario with a new color octet vector boson at 1-3 TeV. We study several models, as well as a general effective field theory, and determine ... More

Valley detection using a graphene gradual pn junction with spin-orbit coupling: an analytical conductance calculationJan 06 2016Graphene pn junction is the brick to build up variety of graphene nano-structures. The analytical formula of the conductance of graphene gradual pn junctions in the whole bipolar region has been absent up to now. In this paper, we analytically calculated ... More

Up Sector of Minimal Flavor Violation: Top Quark Properties and Direct D meson CP violationMay 23 2013Minimal Flavor Violation in the up-type quark sector leads to particularly interesting phenomenology due to the interplay of flavor physics in the charm sector and collider physics from flavor changing processes in the top sector. We study the most general ... More

2HDM Portal Dark Matter: LHC data and the Fermi-LAT 135 GeV LineDec 21 2012We study a two Higgs doublet model augmented by a scalar dark matter particle that provides an excellent fit to the LHC Higgs data and the Fermi-LAT 135 GeV line. The heavy CP-even Higgs boson, which predominantly mediates annihilation and scattering, ... More

Sinusoidally Modulated Vacuum Rabi Oscillation of a Two-Level Atom in an Optomechanical CavityJul 20 2015We study the coherent dynamics of an excited two-level atom in a vacuum optomechanical cavity and find that the original atom-cavity Rabi oscillation is sinusoidally modulated by the light-mechanics coupling as the Rabi splitting is on resonance with ... More

Urban contact structures for epidemic simulations: Correcting biases in data-driven approachesApr 27 2018Sep 21 2018Epidemics are emergent phenomena depending on the epidemiological characteristics of pathogens and the interaction and movement of people. Public transit systems have provided much important information about the movement of people, but there are also ... More

Thermodynamical Properties and Quasi-localized Energy of the Stringy Dyonic Black Hole SolutionOct 31 2011In this article, we calculate the heat flux passing through the horizon $. {\bf TS}|_{r_h}$ and the difference of energy between the Einstein and M{\o}ller prescription within the region ${\cal M}$, in which is the region between outer horizon ${\cal ... More

Learn to Interpret Atari AgentsDec 29 2018Jan 24 2019Deep Reinforcement Learning (DeepRL) agents surpass human-level performances in a multitude of tasks. However, the direct mapping from states to actions makes it hard to interpret the rationale behind the decision making of agents. In contrast to previous ... More

Machine learning Applied to Star-Galaxy-QSO Classification and Stellar Effective Temperature RegressionNov 09 2018In modern astrophysics, the machine learning has increasingly gained more popularity with its incredibly powerful ability to make predictions or calculated suggestions for large amounts of data. We describe an application of the supervised machine-learning ... More

Super Damping of Mechanical VibrationsNov 21 2018Dec 03 2018We report the phenomenon of coherent super decay, where a linear sum of several damped oscillators can collectively decay much faster than the individual ones in the first stage, followed by stagnating ones after more than 90 percent of the energy has ... More

Scale Optimization for Full-Image-CNN Vehicle DetectionFeb 20 2018Many state-of-the-art general object detection methods make use of shared full-image convolutional features (as in Faster R-CNN). This achieves a reasonable test-phase computation time while enjoys the discriminative power provided by large Convolutional ... More

Incorporating energy storage and user experience in isolated microgrid dispatch using a multi-objective modelJan 21 2019In order to coordinate multiple different scheduling objectives from the perspectives of economy, environment and users, a practical multi-objective dynamic optimal dispatch model incorporating energy storage and user experience is proposed for isolated ... More

Enhancement of the electrocaloric cooling by electric field reversal: simulation and experimentMar 25 2016Jul 11 2016An improved thermodynamic cycle is proposed, where the cooling effect of an electrocaloric refrigerant is enhanced by applying a reversed electric field. In contrast to conventional adiabatic heating or cooling by on-off cycles of the external electric ... More

Complexities Approach to Two Problems In Number TheoryOct 13 2016Oct 21 2016By Kolmogorov Complexity,two number-theoretic problems are solved in different way than before,one problem is Maxim Kontsevich and Don Bernard Zagier's Problem 3 \emph{Exhibit at least one number which does not belong to} $ \mathcal{P}$ (period number) ... More

Composite Octet Searches with Jet SubstructureJul 18 2011Many new physics models with strongly interacting sectors predict a mass hierarchy between the lightest vector meson and the lightest pseudoscalar mesons. We examine the power of jet substructure tools to extend the 7 TeV LHC sensitivity to these new ... More

A Light Dilaton in Walking Gauge TheoriesJun 22 2010Dec 24 2010We analyze the existence of a dilaton in gauge theories with approximate infrared conformal symmetry. To the extent that these theories are governed in the infrared by an approximate fixed point (walking), the explicit breaking of the conformal symmetry ... More

Topological PionsMar 15 2010Dec 24 2010We study the collider signatures of new pions, composite particles which emerge from a TeV-scale, confining gauge theory with vector-like matter. Similar to the neutral pion in QCD, these new pions mainly decay into a pair of standard model (SM) gauge ... More

Coloron-assisted Leptoquarks at the LHCJul 16 2014Recent searches for a first-generation leptoquark by the CMS collaboration have shown around 2.5 sigma deviations from Standard Model predictions in both the eejj and e nu jj channels. Furthermore, the eejj invariant mass distribution has another 2.8 ... More

A dislocation-based explanation of quasi-elastic release in shock-loaded aluminumSep 27 2016A novel explanation of the quasielastic release phenomenon in shock compressed aluminum is presented. A dislocation-based model, taking into account dislocation substructures and evolution, is applied to simulate the elastic plastic response of both single ... More

Spin wave and spin flip in hexagonal LuMnO3 single crystalJul 21 2016Manipulate and control of spin wave and spin flip are crucial for future developments of magnonic and spintronic devices. We present that the spin wave in hexagonal LuMnO3 single crystal can be selectively excited with laser polarization perpendicular ... More

Insensitive Stochastic Gradient Twin Support Vector Machine for Large Scale ProblemsApr 19 2017Nov 23 2017Stochastic gradient descent algorithm has been successfully applied on support vector machines (called PEGASOS) for many classification problems. In this paper, stochastic gradient descent algorithm is investigated to twin support vector machines for ... More

SuperbumpsMar 23 2016For a wide range of supersymmetric models, there is a chiral superfield whose scalar and pseudo-scalar have approximately degenerate masses and couplings to Standard Model particles. At colliders, they may show up as "superbumps": a pair of resonances ... More

The Scale of Dark QCDJun 19 2013Mar 26 2014Most of the mass of ordinary matter has its origin from quantum chromodynamics (QCD). A similar strong dynamics, dark QCD, could exist to explain the mass origin of dark matter. Using infrared fixed points of the two gauge couplings, we provide a dynamical ... More

Complexities Approach to Two Problems In Number TheoryOct 13 2016Oct 14 2016By Kolmogorov Complexity,two number-theoretic problems are solved in different way than before,one problem is Maxim Kontsevich and Don Bernard Zagier's Problem 3 \emph{Exhibit at least one number which does not belong to} $ \mathcal{P}$ (period number) ... More

A Unified Dark Matter Model in sUEDNov 04 2008May 26 2009We propose a dark matter model with standard model singlet extension of the universal extra dimension model (sUED) to explain the recent observations of ATIC, PPB-BETS, PAMELA and DAMA. Other than the standard model fields propagating in the bulk of a ... More

Improving the Top Quark Forward-Backward Asymmetry Measurement at the LHCJun 24 2011At the LHC, top quark pairs are dominantly produced from gluons, making it difficult to measure the top quark forward-backward asymmetry. To improve the asymmetry measurement, we study variables that can distinguish between top quarks produced from quarks ... More

Gamma Lines without a Continuum: Thermal Models for the Fermi-LAT 130 GeV Gamma LineAug 20 2012Recent claims of a line in the Fermi-LAT photon spectrum at 130 GeV are suggestive of dark matter annihilation in the galactic center and other dark matter-dominated regions. If the Fermi feature is indeed due to dark matter annihilation, the best-fit ... More

Reach the Bottom Line of the Sbottom SearchApr 23 2012We propose a new search strategy for directly-produced sbottoms at the LHC with a small mass splitting between the sbottom and its decayed stable neutralino. Our search strategy is based on boosting sbottoms through an energetic initial state radiation ... More

Epidemic spreading and immunization with identical infectivityNov 09 2006Apr 04 2007In this paper, a susceptible-infected-susceptible (SIS) model with identical infectivity, where each node is assigned with the same capability of active contacts, $A$, at each time step, is presented. We found that on scale-free networks, the density ... More

Integrable Open Spin Chains from Flavored ABJM TheoryApr 19 2017Apr 27 2017We compute the two-loop anomalous dimension matrix in the scalar sector of planar ${\cal N}=3$ flavored ABJM theory. Using coordinate Bethe ansatz, we obtain the reflection matrix and confirm that the boundary Yang-Baxter equations are satisfied. This ... More

Non-Stationary Texture Synthesis by Adversarial ExpansionMay 11 2018The real world exhibits an abundance of non-stationary textures. Examples include textures with large-scale structures, as well as spatially variant and inhomogeneous textures. While existing example-based texture synthesis methods can cope well with ... More

Measuring the Dark Force at the LHCFeb 02 2009Aug 01 2009A long-range ``dark force'' has recently been proposed to mediate the dark matter (DM) annihilation. If DM particles are copiously produced at the Large Hadron Collider (LHC), the light dark force mediator will also be produced through radiation. We demonstrate ... More

Selective distillation phenomenon in two-species Bose-Einstein condensates in open boundary optical latticesAug 01 2015Feb 01 2016We investigate the formation of discrete breathers (DBs) and the dynamics of the mixture of two-species Bose-Einstein condensates (BECs) in open boundary optical lattices using the discrete nonlinear Schr\"{o}dinger equations. The results show that the ... More

Topologically trivial and nontrivial edge bands in graphene induced by irradiationJan 06 2016Jun 27 2016We proposed a minimal model to describe the Floquet band structure of two-dimensional materials with light-induced resonant inter-band transition. We applied it to graphene to study the band features caused by the light irradiation. Linearly polarized ... More

Dark Matter Jets at the LHCSep 27 2011We argue that dark matter particles which have strong interactions with the Standard Model particles are not excluded by current astrophysical constraints. These dark matter particles have unique signatures at colliders; instead of missing energy, the ... More

Fermion Portal Dark MatterAug 02 2013Jun 23 2014We study a class of simplified dark matter models in which one dark matter particle couples with a mediator and a Standard Model fermion. In such models, collider and direct detection searches probe complimentary regions of parameter space. For Majorana ... More

Top-antitop and Top-top Resonances in the Dilepton Channel at the CERN LHCSep 26 2008Apr 12 2009We perform a model-independent study for top-antitop and top-top resonances in the dilepton channel at the Large Hadtron Collider. In this channel, we can solve the kinematic system to obtain the momenta of all particles including the two neutrinos, and ... More

Large N (=3) Neutrinos and Random Matrix TheoryOct 08 2012Nov 06 2012The large N limit has been successfully applied to QCD, leading to qualitatively correct results even for N=3. In this work, we propose to treat the number N=3 of Standard Model generations as a large number. Specifically, we apply this idea to the neutrino ... More

Deep-Person: Learning Discriminative Deep Features for Person Re-IdentificationNov 29 2017Jul 24 2018Recently, many methods of person re-identification (Re-ID) rely on part-based feature representation to learn a discriminative pedestrian descriptor. However, the spatial context between these parts is ignored for the independent extractor to each separate ... More

Chandra ACIS Survey of X-ray Point Sources: The Source CatalogMar 28 2016The $Chandra$ archival data is a valuable resource for various studies on different topics of X-ray astronomy. In this paper, we utilize this wealth and present a uniformly processed data set, which can be used to address a wide range of scientific questions. ... More

Spin helical states and spin transport of the line defect in silicene latticeJan 06 2016We investigated the electronic structure of a silicene-like lattice with a line defect under the consideration of spin-orbit coupling. In the bulk energy gap, there are defect related bands corresponding to spin helical states localized beside the defect ... More

Identifying Dark Matter Event Topologies at the LHCDec 08 2010Assuming dark matter particles can be pair-produced at the LHC from cascade decays of heavy particles, we investigate strategies to identify the event topologies based on the kinematic information of final state visible particles. This should be the first ... More

ICDAR2017 Competition on Reading Chinese Text in the Wild (RCTW-17)Aug 31 2017Sep 26 2018Chinese is the most widely used language in the world. Algorithms that read Chinese text in natural images facilitate applications of various kinds. Despite the large potential value, datasets and competitions in the past primarily focus on English, which ... More

$η_{Q}$ meson photoproduction in ultrarelativistic heavy ion collisionsAug 20 2017Jan 03 2018The transverse momentum distributions for inclusive $\eta_{c,b}$ meson described by gluon-gluon interactions from photoproduction processes in relativistic heavy ion collisions are calculated. We considered the color singlet (CS) and color octet (CO) ... More

Heavy octets and Tevatron signals with three or four b jetsDec 28 2010Hypothetical color-octet particles of spin 0, pair-produced at hadron colliders through their QCD coupling, may lead to final states involving three or four b jets. We analyze kinematic distributions of the 3b final state that differentiate the scalar ... More

CP Violating Contribution to Delta Gamma in the B_s System from Mixing with a Hidden PseudoscalarJul 04 2010Recent evidence for a CP violating asymmetry in the semileptonic decays of B_s mesons cannot be accommodated within the Standard Model. Such an asymmetry can be explained by new physics contributions to Delta B=2 components of either the mass matrix or ... More

Resonant Dark MatterSep 16 2009Nov 11 2009It is usually assumed that dark matter direct detection is sensitive to a large fraction of the dark matter (DM) velocity distribution. We propose an alternative form of dark matter-nucleus scattering which only probes a narrow range of DM velocities ... More

A Search for Exoplanets around Northern Circumpolar Stars. IV. Six Planet Candidates to the K Giants, HD 44385, HD 97619, HD 106574, HD 118904, HD 164428, and HD 202432Aug 03 2018We report the discovery of long-period radial velocity (RV) variations in six intermediate-mass K-giant stars using precise RV measurements. These discoveries are part of the Search for Exoplanets around Northern Circumpolar Stars (SENS) survey being ... More

A Holographic Model of Heavy-light MesonsJun 12 2013We construct a holographic model of heavy-light mesons by extending the AdS/QCD to incorporate the behavior of the heavy quark limit. In that limit, the QCD dynamics is governed by the light quark and the heavy quark simply plays the role of a static ... More

Image Restoration using Group Sparse Representation via Weighted Nuclear Norm MinimizationAug 16 2016As the matrix formed by nonlocal similar patches in a natural image is of a low rank, the nuclear norm minimization (NNM) has been widely studied for image processing. Since the singular values have clear meanings and should be treated differently, NNM ... More

Superconductivity in tantalum self-intercalated 4$Ha$-Ta$_{1.03}$Se$_2$Jan 29 2018TaSe$_2$ has several different polytypes and abundant physical properties such as superconductivity and charge density waves (CDW), which had been investigated in the past few decades. However, there is no report on the physical properties of 4$Ha$ polytype ... More

Epidemic spreading on heterogeneous networks with identical infectivitySep 17 2006In this paper, we propose a modified susceptible-infected-recovered (SIR) model, in which each node is assigned with an identical capability of active contacts, $A$, at each time step. In contrast to the previous studies, we find that on scale-free networks, ... More

MWPC prototyping and performance test for the STAR inner TPC upgradeMay 10 2018A new prototype of STAR inner Time Projection Chamber (iTPC) MWPC sector has been fabricated and tested in an X-ray test system. The wire chamber built at Shandong University has a wire tension precision better than 6$\%$ and wire pitch precision better ... More

TorontoCity: Seeing the World with a Million EyesDec 01 2016In this paper we introduce the TorontoCity benchmark, which covers the full greater Toronto area (GTA) with 712.5 $km^2$ of land, 8439 $km$ of road and around 400,000 buildings. Our benchmark provides different perspectives of the world captured from ... More

Strongly enhanced critical current density in Fe-sheathed MgB2 tapes by stearic acid and stearate dopingJan 16 2007Feb 14 2007Fe-sheathed MgB2 tapes with cheap stearic acid, Mg stearate and Zn stearate doping were prepared through the in situ powder-in-tube method. It is found that Jc, Hirr, and Hc2 were significantly enhanced by doping. Compared to the pure tapes, Jc for all ... More

Extremes of $α(t)$-Locally stationary Gaussian processes with non-constant variancesJun 22 2016Aug 21 2016With motivation from K. D\c{e}bicki and P. Kisowski (2007), in this paper we derive the exact tail asymptotics of $\alpha(t)$-locally stationary Gaussian processes with non-constant variance functions. We show that some certain variance functions lead ... More

Estimation of Change-point ModelsMay 01 2018May 08 2018We consider the testing and estimation of change-points, locations where the distribution abruptly changes, in a sequence of observations. Motivated by this problem, in this contribution we first investigate the extremes of Gaussian fields with trend ... More

Natural Milli-Charged InflationMay 26 2014We construct a natural inflation model with the inflaton as a linear combination of the fifth components of Abelian gauge fields in a five-dimensional theory. A seesaw mechanism is introduced to provide a natural milli-charge for matter fields under one ... More

Entanglement and measurement-induced nonlocality of mixed maximally entangled states in multipartite dynamicsJun 23 2015Jun 12 2016The maximally entangled state can be in a mixed state as well as the well-known pure state. Taking the negativity as a measure of entanglement, we study the entanglement dynamics of bipartite, mixed maximally entangled states (MMESs) in multipartite cavity-reservoir ... More

State transition and electrocaloric effect of BaZr$_{x}$Ti$_{1-x}$O$_3$: simulation and experimentAug 17 2016The electrocaloric effect (ECE) of BaZr$_{x}$Ti$_{1-x}$O$_3$ (BZT) is closely related to the relaxor state transition of the materials. This work presents a systematic study on the ECE and the state transition of the BZT, using a combined canonical and ... More

Kinematics and Stellar Population Properties of the Andromeda Galaxy by the Spectroscopic Observations of the Guoshoujing TelescopeMay 18 2011The Andromeda galaxy was observed by the Guoshoujing Telescope (GSJT, formly named the Large Sky Area Multi-Object Fiber Spectroscopic Telescope -- LAMOST) during the 2009 commissioning phase. Due to the absence of standard stars for flux calibration, ... More

High-frequency Oscillations in the Atmosphere above a Sunspot UmbraMar 24 2018We use high spatial and temporal resolution observations, simultaneously obtained with the New Vacuum Solar Telescope and Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory, to investigate the high-frequency oscillations above ... More

Quantum Teichmüller spaces and Kashaev's 6j-symbolsJun 14 2007The Kashaev invariants of 3-manifolds are based on $6j$-symbols from the representation theory of the Weyl algebra, a Hopf algebra corresponding to the Borel subalgebra of $U_q(sl(2,\C))$. In this paper, we show that Kashaev's $6j$-symbols are intertwining ... More

${\mathcal O}$-operators of Loday algebras and analogues of the classical Yang-Baxter equationSep 21 2009We introduce notions of ${\mathcal O}$-operators of the Loday algebras including the dendriform algebras and quadri-algebras as a natural generalization of Rota-Baxter operators. The invertible $\mathcal O$-operators give a sufficient and necessary condition ... More

A characterization of the unitary highest weight modules by Euclidean Jordan algebrasMar 29 2012Nov 28 2012Let $\mathfrak{co}(J)$ be the conformal algebra of a simple Euclidean Jordan algebra $J$. We show that a (non-trivial) unitary highest weight $\mathfrak{co}(J)$-module has the smallest positive Gelfand-Kirillov dimension if and only if a certain quadratic ... More

A Unified Algebraic Approach to Classical Yang-Baxter EquationJul 28 2007In this paper, the different operator forms of classical Yang-Baxter equation are given in the tensor expression through a unified algebraic method. It is closely related to left-symmetric algebras which play an important role in many fields in mathematics ... More

A Uniqueness Property for the Quantization of Teichmüller SpacesSep 28 2005Chekhov, Fock and Kashaev introduced a quantization of the Teichm\"{u}ller space $\mathcal{T}^q(S)$ of a punctured surface $S$, and an exponential version of this construction was developed by Bonahon and Liu. The construction of the quantum Teichm\"{u}ller ... More

Splitting and successively solving augmented Lagrangian method for optimization with semicontinuous variables and cardinality constraintJun 15 2015We propose a new splitting and successively solving augmented Lagrangian (SSAL) method for solving an optimization problem with both semicontinuous variables and a cardinality constraint. This optimization problem arises in several contexts such as the ... More

SU(3) Family Gauge Symmetry and the AxionDec 28 2006Jan 24 2007We analyze the structure of a recently proposed effective field theory (EFT) for the generation of quark and lepton mass ratios and mixing angles, based on the spontaneous breaking of an SU(3) family gauge symmetry at a high scale F. We classify the Yukawa ... More

A Large Sample of Am Candidates from LAMOST Data Release 1Jan 26 2015We present a sample of metallic-line star (Am) candidates from the Large sky Area Multi-Object fiber Spectroscopic Telescope Data Release one (LAMOST DR1). According to the characteristic of under-abundance of calcium and overabundance of iron element ... More

Beauty-full TetraquarksNov 30 2016In this article we present a calculation of the $bb\bar{b}\bar{b}$ tetraquark ground-state energy using a diffusion Monte Carlo method to solve the non-relativistic many-body system. The static potential for the four quark system is chosen to align with ... More

Pulling Out All the Stops: Searching for RPV SUSY with Stop-JetsSep 25 2013If the lighter stop eigenstate decays directly to two jets via baryonic R-parity violation, it could have escaped existing LHC and Tevatron searches in four-jet events, even for masses as small as 100 GeV. In order to recover sensitivity in the face of ... More

Measuring the Invisible Higgs Width at the 7 and 8 TeV LHCDec 19 2011Aug 21 2012The LHC is well on track toward the discovery or exclusion of a light Standard Model (SM)-like Higgs boson. Such a Higgs has a very small SM width and can easily have large branching fractions to physics beyond the SM, making Higgs decays an excellent ... More

Inelastic Dark Matter at the LHCSep 19 2011We perform a model-independent study of inelastic dark matter at the LHC, concentrating on the parameter space with the mass splitting between the excited and ground states of dark matter above a few hundred MeV, where the direct detection experiments ... More

Dichromatic Dark MatterDec 04 2012Both the robust INTEGRAL 511 keV gamma-ray line and the recent tentative hint of the 135 GeV gamma-ray line from Fermi-LAT have similar signal morphologies, and may be produced from the same dark matter annihilation. Motivated by this observation, we ... More

Searches with Mono-LeptonsAug 21 2012Jun 19 2013We explore the implications of the mono-lepton plus missing transverse energy signature at the LHC, and point out its significance on understanding how dark matter interacts with quarks, where the signature arises from dark matter pair production together ... More

Cosmological Constraints on the Gravitational Interactions of Matter and Dark MatterMay 18 2015Although there is overwhelming evidence of dark matter from its gravitational interaction, we still do not know its precise gravitational interaction strength or whether it obeys the equivalence principle. Using the latest available cosmological data ... More

Rotation of easy axis in training effect and recovery of exchange bias in ferromagnet/antiferromagnet bilayersOct 13 2007For ferromagnet/antiferromagnet bilayers, rotation of the easy axis has been \textit{for the first time} observed during measurements of training effect and the recovery of exchange bias using FeNi/FeMn system. These salient phenomena strongly suggest ... More

Monolithic photonic integration of suspended light emitting diode, waveguide and photodetectorDec 07 2015We report here a monolithic photonic integration of light emitting diode (LED) with waveguide and photodetector to build a highly-integrated photonic system to perform functionalities on the GaN-on-silicon platform. Suspended p-n junction InGaN/GaN multiple ... More

J_{E_T}: A Global Jet Finding AlgorithmNov 13 2014We introduce a new jet-finding algorithm for a hadron collider based on maximizing a J_{E_T} function for all possible combinations of particles in an event. This function prefers a larger value of the jet transverse energy and a smaller value of the ... More

Color-octet Companions of a 750 GeV Heavy PionApr 26 2016Color octet bosons are a universal prediction of models in which the 750 GeV diphoton resonance corresponds to a pion of a QCD-like composite sector. We show that the existing searches for dijet and photon plus jet resonances at the LHC constrain single ... More

A 750 GeV Dark Pion: Cousin of a Dark G-parity-odd WIMPDec 17 2015Dec 25 2015We point out a potential common origin of the recently observed 750 GeV diphoton resonance and a Weakly Interacting Massive Particle (WIMP) candidate. In a dark QCD sector with an unbroken dark G-parity, the diphoton resonance could be a dark G-even pion, ... More