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[ { "content": "positron emission tomography ( pet ) is a nuclear imaging technique used to monitor metabolic activity of the body . \n the pet system detects gamma rays generated when electrons collide with positrons emitted by radiolabelled biologically active molecules , such as fluorodeoxyglucose . in oncolog...
[ { "content": "the authors are grateful to the useful discussion with hsien - chung kao and shoichi kawamoto in the early stage of this work . \n wyw would like to thank the warm hospitality received in the ustc , china when part of this work was presented in the east asia joint workshop on fields and strings an...
[ { "content": "the universe is filled by light . \n there are two principal sources of such photons the cosmic microwave background ( cmb ) and the extragalactic background light ( ebl ) . \n while cmb properties are quite well measured and theoretically understood for more than 20 years ( e.g. @xcite ) , many ...
[ { "content": "it has been recognized that exotic magnetic excitations known as skyrmions may exist @xcite in a two - dimensional electron gas in a strong homogeneous magnetic field ( quantum hall system ) near spin polarized groundstates . \n these are excitations of a two - dimensional spontaneous ferromagnet ...
[ { "content": "the origin of the martian methane ( ch@xmath1 ) is still poorly understood . despite the fact that the presence of ch@xmath1 remains under debate ( zahnle et al . \n 2011 ; zahnle 2015 ) , detections have been claimed at the 1060 parts per billion by volume ( ppbv ) level in mars atmosphere from s...
[ { "content": "let @xmath8 be a field of characteristic @xmath9 . \n let @xmath10 be a reducive algebraic group over @xmath11 , @xmath12 a borel subgroup and @xmath13 the weyl group and its simple reflections . \n denote by @xmath14 the bounded derived category of sheaves of @xmath8-vector spaces on @xmath1 cons...
[ { "content": "recent years have seen a growing interest in the application of the geometrical ideas originally developed for studying einstein s theory of general relativity to other areas of physics , such as condensed matter physics . \n the motivation is both the theoretical aim of developing the mathematica...
[ { "content": "the mass distribution of dark matter haloes provides a direct probe of the nature of the dark matter particle , as the inner structure of dark matter haloes is particularly sensitive to the dark matter properties . \n for example , warm dark matter should produce lower density halo cores than cold...
[ { "content": "quantum phenomenon has been observed by numerous experiments on microscopic scales . however , on macroscopic scales , it is difficult to find quantum effects , such as quantum superpositions . \n a lot of physicists have been looking up the root of quantum - to - classical transition for decades ...
[ { "content": "we are interested in answering two very basic questions about continuous - time , discrete - symbol stochastic processes : * what are their minimal maximally predictive models their ? * what are information - theoretic characterizations of their randomness , predictability , and complexity ? ...
[ { "content": "recent surveys have found a significant population of low - mass stars , brown dwarfs and planetary - mass objects in young open clusters . since low - mass objects evolve little over the lifetime of the universe , the present day mass function of these objects is a good representation of the init...
[ { "content": "in an earlier paper @xcite , hereafter referred to as i , we have explored the lhc implications of imposing @xmath0 quasi - yukawa unification ( qyu ) at the grand unification scale ( @xmath12 gev ) . \n this modified approach to the third family ( @xmath0 ) yu @xcite can be motivated by the desir...
[ { "content": "the broadband spectrum observed in blazars is dominated by beamed emission produced in relativistic jets that emanate from the central black hole . \n these jets propagate through a dense radiative environment , and interact with seed photons that are supplied by extended radiation sources , notab...
[ { "content": "in a number of recent works [ 1 - 3 ] we have calculated various hadronic correlation functions and compared our results to results obtained in lattice simulations of qcd [ 4 - 6 ] . \n the lattice results for the correlators , @xmath2 , may be used to obtain the corresponding spectral functions ,...
[ { "content": "the search of new gauge interactions has been of great interest . \n such efforts help us understand whether there is any other new force in nature and how it fits to the grand picture of particle physics . if found , there is also a possibility that the new force carrier provides a portal between...
[ { "content": "there has been conclusive evidence indicating that our universe is experiencing an accelerated expansion . \n this acceleration is believed driven by a so called dark energy ( de ) in the framework of einstein s general relativity . \n the simplest explanation of such de is the cosmological consta...
[ { "content": "squeezing in an ensemble of two - level systems @xcite is a quantum phenomenon with applications ranging from quantum information @xcite to precision metrology @xcite . \n since the canonical two - level system is a spin-@xmath0 particle , this is often referred to as `` spin squeezing '' , but ph...
[ { "content": "in the @xmath14-dominated , cold dark matter ( @xmath14cdm ) cosmology , massive galaxies form hierarchically inside of dark matter haloes ( eg . * ? ? ? * ; * ? ? ? * ) . \n the mass evolution of these cdm haloes can place stringent constraints on the cosmological models ( eg . * ? ? ? \n * ) , a...
[ { "content": "herb wilf , in addition to having done important work on problems related to counting combinatorial objects , has also done pioneering research on algorithms for generating combinatorial objects `` at random '' ( that is , generating an element of a finite combinatorial set so that each element ha...
[ { "content": "long gamma - ray bursts ( grbs ) are now considered to be death of massive stars ( so called collapsar scenario ) . \n the most convincing observational evidences have been associations with supernovae ( sne ) . \n some associations were spectroscopically , others were photometrically . however , ...
[ { "content": "the paradigm of a quantum spin interacting with its dissipative environment has drawn sustained research interests in a variety of fields including quantum computation @xcite , spin dynamics @xcite , quantum phase transitions @xcite , charge transfer in biological molecules @xcite and impurity eff...
[ { "content": "antiferromagnetic spin systems on fully frustrated lattices show many unusual behaviors in magnetic and thermal properties@xcite . \n one of the main ingredients is that their unit cell allows for a continuous degree of freedom and that the connectivity ( corner sharing ) allows for an extensive n...
[ { "content": "a _ network _ , in the simplest terms , is a collection of points in some space ( e.g. on the euclidean plane ) , called _ nodes _ or _ vertexes _ , and a collection of node pairs , called _ \n edges_. the presence of an edge between two nodes indicates that they can directly communicate with each...
[ { "content": "the _ eigenvalues _ of an @xmath4 complex matrix @xmath13 are the roots in @xmath9 of its characteristic polynomial . \n we label them @xmath14 so that @xmath15 with growing phases \n spectral radius _ is @xmath16 . \n we also denote by @xmath17 the _ singular values _ of @xmath13 , defined for al...
[ { "content": "one - way quantum computing @xcite is an important approach for quantum computation based on a series of one - qubit measurements starting from a cluster state of a qubit array . \n cluster states are highly - entangled states involving all qubits and are typically generated from an ising - like ...
[ { "content": "heavy meson hadronic matrix elements play an essential role in determining many of the parameters of the standard model , such as the ckm matrix elements . \n theoretically , lattice gauge theory provides a means of computing these hadronic matrix elements with better control of systematic errors ...
[ { "content": "experimental information on 3-dimensional imaging \" of hadrons , encoded in unintegrated , transverse momentum dependent ( tmd ) parton density and parton decay functions , comes at present from two main sets of experimental data : deep inelastic scattering ( dis ) at high energy , and low-@xmat...
[ { "content": "the experimental ability to create a superfluid alkali atom fermi gas in optical lattices@xcite opens a new opportunity to study strongly correlated quantum many - particle systems and to emulate high - temperature superconductors . \n theoretical description of ultracold atomic bose and fermi gas...
[ { "content": "it was calabi @xcite who first recognised the rich geometry that can be found on a hypersurface of @xmath6 when the latter is equipped with its natural cross product and @xmath3-structure . \n the realization , much later , of metrics with holonomy _ equal _ to @xmath3 allowed this theory to be ex...
[ { "content": "a bose - einstein condensate ( bec ) in an optical trap @xcite exhibits a rich variety of spin - related phenomena , such as various magnetic phases @xcite and spin domain formation @xcite . \n the nuclear spin of @xmath2 and @xmath3 is @xmath4 , and combined with the spin @xmath5 of the outerm...
[ { "content": "the international linear collider ( ilc ) @xcite is an electron - positron collider with a centre - of - mass energy up to 1 tev and a luminosity goal of @xmath0 . \n the achievement of this goal is challenging , and requires nanometre - sized colliding beams at the interaction point , achieved t...
[ { "content": "the rossiter mclaughlin effect ( hereafter the rm effect ) is a phenomenon originally reported as a `` rotational effect '' in eclipsing binary systems by @xcite ( for the beta lyrae system ) and @xcite ( for the algol system ) . in the context of extrasolar planetary science , \n the rm effect i...
[ { "content": "supernova explosions feature the interplay of all four known fundamental forces . a complete picture of supernova ( sn ) explosions will therefore require true multi - messenger observations , with data from traditional optical telescopes analyzed alongside coincident data from neutrino and gravit...
[ { "content": "-0.3 cm topological quantities are fundamental to describe low dimensional quantum liquids where standard symmetry breaking do not have a primal importance @xcite . \n typical examples are quantum hall liquids @xcite and anisotropic superconductors with time - reversal symmetry breaking @xcite . \...
[ { "content": "the strangeness meson photoproduction off the nucleon target is one of the most well - studied experimental and theoretical subjects to reveal the hadron production mechanisms and its internal structures , in terms of the strange degrees of freedom , breaking the flavor su(3 ) symmetry explicitly ...
[ { "content": "a logarithmic upturn in the resistivity at low temperature has been observed in graphene with vacancies@xcite . \n a fit to the temperature dependence of resistivity with conventional kondo effect yields a large kondo temperature ( with @xmath0 ) which shows a non - monotonic behavior with respect...
[ { "content": "in many applications of quantum mechanics to communication , the sender and the receiver have to share a maximally entangled quantum state of two particles . \n when there is a noiseless quantum communication channel , the sender can send one of two particles in a maximally entangled state to the ...
[ { "content": "collective phenomena play an important role in heavy - ion collisions , but for a long time it was assumed that , at collision energies much greater than 1 gev / nucleon , only longitudinal and azimuthally symmetric transverse radial flow would survive . during the last few years \n the situation...
[ { "content": "an important question in particle physics is the nature of new physics beyond the astoundingly successful standard model . \n one compelling scenario for this new physics is the weak scale supersymmetry which provides an answer to a number of puzzles of the standard model such as a solution to the...
[ { "content": "in a recent study @xcite we proposed a frustrated spring - network model to simulate the surface structures of crosslinked polymer gels into which voids are introduced through templating by surfactant micelles . experimentally , templated polyacrylamide gels are created by mixing acrylamide with a...
[ { "content": "we will explore tropical properties of weighted , or metric trees @xmath2 using the representation theory of the special linear group @xmath1 we direct the reader to the book by fulton and harris @xcite and the book by dolgachev @xcite for an introduction to the representation theory of connected ...
[ { "content": "alfvn waves play important roles in strongly magnetized media . \n they propagate along magnetic field lines with the alfvn speed @xmath2 , where @xmath3 is the strength of the mean magnetic field and @xmath4 is density . \n alfvn waves moving in opposite directions can interact and result in alfv...
[ { "content": "the decay @xmath16 ( @xmath17 ) provides unique information about the dynamics of the strong interactions . \n it has been a testing ground for such theories as current algebra , pcac , chiral perturbation theory(chpt ) . \n the study of this decay has a particular interest in view of new two - lo...
[ { "content": "in non - relativistic mechanics , the trajectory of a particle is most commonly expressed as a function @xmath0 , which describes how the position of the particle evolves with time . in relativistic mechanics , where space and time are treated in a symmetric way \n , the particle s trajectory is r...
[ { "content": "very long baseline interferometry ( vlbi ) is a powerful technique for obtaining positions of celestial objects with milliarcsecond ( mas ) level accuracy . \n the vlbi exploration of radio astrometry ( vera ) telescopes are a japanese vlbi array dedicated to phase referencing vlbi @xcite . \n v...
[ { "content": "the time evolution of the intrinsic continuum v - band polarization ( v - pol ) of @xmath0 aqr is shown in figure 1 . \n we find evidence of clockwise loop - like structures ( figure 2 ) when comparing the evolution of the polarization across the balmer jump ( bj ) vs v - pol , particularly during...
[ { "content": "graphene is recognized as the only two - dimensional crystal that withstands large deformations and high temperatures and is readily integrated into electronic circuits.@xcite the high electron mobility and unique spectral characteristics single out graphene as a promising key element for electron...
[ { "content": "bars are elongated structures frequently present in the central parts of disc galaxies . their formation is ubiquitous in n - body simulations , unless a sufficiently massive and sufficiently centrally concentrated spherical or spheroidal component has been added to stop or at least to delay their...
[ { "content": "more than thirty years , after the discovery of gamma - ray bursts ( grbs ) we have now a reasonable grb model . \n the model is based on the dissipation of an ultra - relativistic outflow . at first the flow \n is dissipated by internal shocks ( or another form of internal dissipation ) that prod...
[ { "content": "high resolution imaging , in particular in biology and materials science , is mostly done using scanning electron microscopy ( sem ) . the ease of use and the widespread availability has made this the number one method for imaging in the aforementioned fields . structuring and manipulation of nano...
[ { "content": "dense nano - particle systems have been shown to exhibit collective behavior , as evidenced by aging , and non - equilibrium effects similar to spin glasses.@xcite whether that collective behavior is associated with a `` true '' spin glass phase transition is still controversial . in this paper , ...
[ { "content": "the birational automorphism groups of projective varieties are extensively studied . nowadays we know that , for a projective variety of general type @xmath6 over an algebraically closed field of characteristic zero , the number of birational automorphisms of @xmath6 is bounded by @xmath7 , where ...
[ { "content": "in mutliagent systems , agents form coalitions to perform tasks . \n a useful model for analyzing how tasks can be allocated to groups of agents is the _ group activity selection problem _ ( ) , proposed by darmann et al . \n @xcite . in s , participants express preferences over pairs of the form ...
[ { "content": "in the last years there have been several attempts to understand the diverse aspects of cosmology , as the presence of stable vacua and inflationary conditions , in the framework of supergravity and string theory @xcite . \n one of the most interesting features emerging from these type of models c...
[ { "content": "a great deal of attention has been devoted recently to the subject of perfect state transfer ( pst ) in quantum networks . \n since an actual quantum processor would require , in fact , the ability to transfer quantum information between spatially separated interacting systems composing a network...
[ { "content": "the term ` animal faith ' in our subtitle is taken from the title of santayana s book skepticism and animal faith\"@xcite ; it refers to what gets us through the day and keeps our thought processes going even through our spells of radical doubt . \n santayana was concerned to delimit animal faith...
[ { "content": "the study of ultra - relativistic heavy - ion collisions provides insight into properties of very high density nuclear matter . \n since the observed particle distributions to first order only reflect the conditions in the final state of the system , signatures originating from the early stage are...
[ { "content": "with most of our used energy being lost as waste heat , there is a growing need for high - performance thermoelectric materials that can directly and reversibly convert heat into electricity . \n the efficiency of a thermoelectric material is determined by the dimensionless figure of merit @xmath2...
[ { "content": "the subject of decoherence of a quantum system has witnessed a renewed interest in the last years . \n in addition to being central to our understanding of the transition from quantum to classical physics@xcite , it is of outmost importance in the blooming field of quantum information@xcite , wher...
[ { "content": "compelling evidences from type ia supernovae ( sn ia ) and other cosmological observations show that the expansion of the universe is undergoing an accelerating stage at late times ( see ref . for reviews ) . within the framework of general relativity and assuming homogeneity and isotropy \n , t...
[ { "content": "suppose @xmath6 particles are placed on vertices of the @xmath0-path , with no site multiply occupied . \n the _ biased exclusion process _ \n is the markov chain @xmath7 with transitions as follows : * choose uniformly among the @xmath8 edges of the path , * if both vertices of the selected ed...
[ { "content": "filaments support both longitudinal and transverse oscillations ( see , * ? ? ? \n the oscillations in the filaments can be used to diagnose the local plasma conditions and magnetic field by applying the principle of mhd seismology ( see , * ? ? ? \n * ; * ? ? ? \n these oscillations are broadly c...
[ { "content": "our knowledge of stellar structure and evolution rests heavily on the comparison between theory and observation . \n double - lined eclipsing binaries ( hereafter ebs ) have long been at the center of this process , since they allow the mass the most fundamental of all stellar properties as well...
[ { "content": "gravitational microlensing surveys were originally suggested by @xcite as a means of detecting dark matter in the galaxy in the form of massive compact objects , commonly abbreviated as machos following @xcite . \n various efforts were undertaken to search for such objects , including the optical ...
[ { "content": "this article presents the calculation , using continuum and lattice methods , of boundary terms in 3-dimensional gravity . \n the gravity theory is presented in first order palatini form , this being a particular example of the general class of bf models @xcite as this is the most convenient prese...
[ { "content": "the dependence of the spectrum of cosmological fluctuations in an inflationary universe on hidden assumptions about the physics on length scales much smaller than the planck length has been recently studied in refs . \n _ a priori _ this dependence comes about since in typical scalar - field - dri...
[ { "content": "over the era of relativistic nuclear collisions , the statistical - thermal models have been widely used in the analysis of particle production . during the past few years \n , these models have been successful in describing particle multiplicities in high energy nuclear reactions at the stage whe...
[ { "content": "inflation @xcite maintains its position as the favourite model for the origin of structure in the universe . \n the reasons are two - fold . \n firstly , the gaussian adiabatic and nearly scale - invariant density perturbations that the usual models produce currently offer the best framework in wh...
[ { "content": "the use of migdal eliashberg ( me ) theory for the study and analysis of electron - phonon systems is widespread . for conventional superconductors such as lead , where the electron - phonon coupling is higher than can be treated with bcs theory , \n me theory has been extremely successful for un...
[ { "content": "when the first galaxies emerged @xmath4 million years after the big bang , their starlight reionized and heated the intergalactic hydrogen that had existed since cosmological recombination . \n much is currently unknown about this process , including what spatial structure it had , when it started...
[ { "content": "astronomers commonly seek to estimate the _ space density _ of objects , and a sky survey such as the sloan digital sky survey ( sdss ) @xcite can yield a representative sample useful for this purpose , due to the assumed isotropy of the universe . \n figure [ rawdata ] depicts redshift and absolu...
[ { "content": "eddy currents are induced electric currents in a conducting material that result when either the object moves through a nonuniform magnetic field or is stationary but subject to a time - changing magnetic field . \n they were first observed by franois arago@xcite but it was not until michael farad...
[ { "content": "savchuk and schmdgen @xcite introduce a method to define and classify the integrable representations of certain * -algebras by an inductive construction . \n the original goal of this article was to clarify this method and thus make it apply to more situations . \n this has led me to reconsider s...
[ { "content": "the moments of velocity differences over spatial scales of size @xmath3 , the so - called structure functions , provide useful measures of the statistical description of fluid turbulence ( kolmogorov 1941a , b ) . \n in particular , the longitudinal structure functions defined as @xmath4^n \\big \...
[ { "content": "an important question in string phenomenology is how and when supersymmetry ( susy ) is broken . \n a great deal of effort has been devoted to frameworks in which it is broken non - perturbatively in the supersymmetric effective field theory . \n much less effort has been devoted to string theorie...
[ { "content": "in this paper we compare different formalisms that can be used to specify and model systems which are distributed , concurrent and mobile , as those that are usually found in the global computing area . \n + global computing is becoming very important because of the great development of networks w...
[ { "content": "a node - capacitated undirected network is a quadruple @xmath9 of node set @xmath10 , ( undirected ) edge set @xmath11 , a specified subset @xmath12 of nodes , called _ \n terminals _ , and a nonnegative integer - valued node capacity @xmath13 on nonterminal nodes . an _ \n @xmath12-path _ is a pa...
[ { "content": "the well - founded semantics was introduced in @xcite to provide 3-valued interpretations to logic programs with negation . since its introduction , the well - founded semantics has become one of the most widely studied and most commonly accepted approaches to negation in logic programming @xcite ...
[ { "content": "decoherence in two - state quantum systems is a significant obstacle to the realization of proposed quantum information technologies . \n coupling between quantum bit ( `` qubit '' ) states and unobserved environmental degrees of freedom leads to decoherence effects which limit the practical imple...
[ { "content": "over the past six decades , much effort has been devoted to determining the critical behavior of statistical properties of lattice models , which would allow a deeper understanding of order - disorder phenomena in magnetic solids . \n following onsager s pioneering exact solution for the square la...
[ { "content": "in relativistic plasmas , such as a quark - gluon plasma ( qgp ) possibly formed in relativistic heavy ion collisions or a qed plasma in a supernova explosion , and in relativistic , degenerate matter , as e.g. strange quark stars , medium effects are of great importance . \n for example , the ori...
[ { "content": "the long - standing quest for a solid state realization of the kitaev honeycomb model@xcite has triggered much of the experimental and theoretical interest in 4d and 5d compounds with two- and three - dimensional tri - coordinated lattices , in which the interplay of the strong spin - orbit coupli...
[ { "content": "recent years have witnessed a growing technological , experimental , and theoretical interest in scaling standard machinery down to micro- and nano - scales as needed for the development of `` lab on a chip '' devices . for applications in , \n e.g. , drug - delivery systems or micromechanics one ...
[ { "content": "the appearance of filaments on the solar disk is associated with the distribution of large - scale magnetic fields and magnetic fields of active regions ( ar ) . \n the filaments are observed virtually at all latitudes in the solar atmosphere . \n systematic @xmath0 observations have been carried ...
[ { "content": "bose - einstein condensates ( becs ) in optical lattices ( ols ) are presently attracting a great deal of interest @xcite due both to their flexibility in parameter design and to the possibility they offer to observe interesting phenomena such as superfluid to mott - insulator transition @xcite ...
[ { "content": "it was recognized by shlyakhter @xcite that isotopic ratios of fission products and secondary neutron absorption reactions that occurred with the oklo natural reactor phenomenon some 2 billion years ago could be used to test whether the fine - structure constant @xmath0 varies with time . \n speci...
[ { "content": "among active galactic nuclei ( agns ) , blazars show intense and variable emission above 100 mev @xcite , and the variability time scale can be as short as a few days , or last a few weeks . \n they emit across several decades of energy , from the radio to the tev energy band and their spectral e...
[ { "content": "[ cols=\"<,^ , < \" , ] trim conditions for the aircraft at 20 m/s are : @xmath0 , @xmath1 and @xmath2 and have been used as initial conditions for the controller . again a prediction window of 5 seconds along with 50 coincidence points were used . the upper limit on the thrust constraint cont...
[ { "content": "the new family of the charmonium or charmonium - like states include @xmath5 , @xmath6 , @xmath7 , @xmath8 , @xmath9 , @xmath10 , @xmath11 , @xmath12 , @xmath13 , @xmath14 and @xmath15 etc @xcite . \n many states sit on the the threshold of two charmed mesons , which inspired some of them ( especi...
[ { "content": "communication is the exchange of physical systems aimed at establishing correlations between the communicating parties . in most circumstances we are interested in the total amount of correlations , _ \n i.e. _ the mutual information , between the sender and receiver @xcite . \n information theor...
[ { "content": "classical and statistical thermodynamics deal with the equilibrium states of matter @xcite . driving the system from one equilibrium state to another \n , however , involves the passage of the system through a sequence of instantaneous states that do not satisfy the conditions for thermodynamic eq...
[ { "content": "a gapped state of quantum condensed matter is called topological phase when it supports stable gapless boundary modes , such as an edge or a surface state . the integer quantum hall effect \n ( qhe ) , which exists in @xmath3 spatial dimensions and under a strong magnetic field , is the best known...
[ { "content": "biological channels are responsible for regulating the fluxes of ions and molecules ( hereafter referred to as particles for short ) across membranes and , therefore , are critically important for the cell functioning @xcite . as well - known , these protein channels are very efficient in the sens...
[ { "content": "the thirring model has been the subject of a very intense research in the last fifty years : it is one of the very few qft models for which non - perturbative informations can be obtained and it shares with more realistic @xmath0 models , like @xmath1 , many features , as it is apparent from a cla...
[ { "content": "black holes through quantum outcome indicate that they radiate due to the hawking effect @xcite . in the absence of established theories of quantum gravity , \n black holes have become a main playground to divulge quantum gravity effects through their thermodynamics . \n black holes have been used...
[ { "content": "the low - energy properties of multilayer graphene@xcite depend crucially on the stacking order of the constituent graphene layers@xcite . in the case of trilayer graphene , there are two stable stacking orders : ( i ) aba or bernard stacking and ( ii ) abc or chiral stacking . recent advances in ...
[ { "content": "a superconductor in electric contact with a normal metal induces superconducting correlations on the normal side . \n this _ proximity effect _ has been studied extensively , both theoretically and experimentally ( see ref . and references therein ) . \n the superconducting properties of the nor...
[ { "content": "the search for new physics beyond the standard model is continuing at the large hadron collider ( lhc ) . \n although we are yet to see any clear hint , there is reason for exhilaration in another way , namely , the discovery of a boson of mass @xmath2 125 gev @xcite . the properties of this part...
[ { "content": "recent proposals in theoretical physics have suggested that our four - dimensional universe could lie on a brane embedded in a higher - dimensional space - time @xcite . \n one of the most studied is the randall sundrum ( rs ) model @xcite where our four - dimensional universe is a brane embedd...
[ { "content": "the formation mechanism of jets is a key issue in the study of the magnetospheric structure of compact astrophysical objects . \n indeed , jets are observed in most compact sources , ranging from active galactic nuclei ( agns ) , quasars , and radio galaxies @xcite to accreting neutron stars , so...