publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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2022-07-11 | Quantum topology in the ultrastrong coupling regime | The coupling between two or more objects can generally be categorized as
strong or weak. In cavity quantum electrodynamics for example, when the
coupling strength is larger than the loss rate the coupling is termed strong,
and otherwise it is dubbed weak. Ultrastrong coupling, where the interaction
energy is of the sam... | 2207.04952v1 |
2022-08-18 | Dynamics of quantum soliton in Lee-Huang-Yang spin-orbit coupled Bose-Einstein condensates | We present the numerical results of the structure and dynamics of the
self-bound ground state arising solely because of the presence of beyond mean
field quantum fluctuation in spin-orbit coupled binary Bose-Einstein
condensates in one dimension. Depending upon spin-obit (SO) and Rabi couplings,
we observe that the gro... | 2208.08777v2 |
2022-09-03 | Homogenization of discrete mesoscale model of concrete for coupled mass transport and mechanics by asymptotic expansion | Mass transport phenomenon in concrete structures is strongly coupled with
their mechanical behavior. The first coupling fabric is the Biot's theory
according to which fluid pressure interacts with solid stress state and
volumetric deformation rate of the solid induces changes in fluid pressure.
Another coupling mechani... | 2209.01419v1 |
2022-09-30 | Generation and transfer of entangled states between two connected microtoroidal cavities: analysis of different types of coupling | We investigate the generation and transfer of entangled states between two
coupled microtoroidal cavities considering two different types of couplings,
namely i) via a bridge qubit and ii) via evanescent fields. The cavities
support two counter-propagating whispering-gallery modes (WGMs) that may also
interact with eac... | 2209.15638v2 |
2022-12-26 | Upper bounds on collective light-matter coupling strength with plasmonic meta-atoms | Ultrastrong coupling between optical and material excitations is a distinct
regime of electromagnetic interaction that enables a variety of intriguing
physical phenomena. Traditional ways to ultrastrong light-matter coupling
involve the use of some sorts of quantum emitters, such as organic dyes,
quantum wells, superco... | 2212.13192v1 |
2023-02-15 | Magnetically-dressed CrSBr exciton-polaritons in ultrastrong coupling regime | The strong coupling between photons and matter excitations such as excitons,
phonons, and magnons is of central importance in the study of light-matter
interactions. Bridging the flying and stationary quantum states, the strong
light-matter coupling enables the coherent transmission, storage, and
processing of quantum ... | 2302.07616v1 |
2023-02-16 | A Superdirective Beamforming Approach with Impedance Coupling and Field Coupling for Compact Antenna Arrays | In most multiple-input multiple-output (MIMO) communication systems, the
antenna spacing is generally no less than half a wavelength. It helps to reduce
the mutual coupling and therefore facilitate the system design. The maximum
array gain equals the number of antennas in this settings. However, when the
antenna spacin... | 2302.08203v1 |
2023-04-06 | Cyclic quantum engines enhanced by strong bath coupling | While strong system-bath coupling produces rich and interesting phenomena,
applications to quantum thermal engines have been so far pointing mainly at
detrimental effects. The delicate trade-off between efficiency loss due to
strong coupling and power increase due to faster equilibration, while
acknowledged, remained l... | 2304.03267v3 |
2023-06-20 | Spin-orbit interaction enabled electronic Raman scattering from charge collective modes | Electronic Raman scattering in the fully symmetric channel couples to the
charge excitations in the system, including the plasmons. However, the plasmon
response has a spectral weight of $\sim q^2$, where $q$, the momentum
transferred by light, is small. In this work, we show that in inversion
symmetry broken systems w... | 2306.11240v2 |
2023-09-20 | Soft-gluon effective coupling: perturbative results and the large-nF limit to all orders | We consider extensions of the soft-gluon effective coupling that generalize
the Catani--Marchesini--Webber (CMW) coupling in the context of soft-gluon
resummation beyond the next-to-leading logarithmic accuracy. Starting from the
probability density of correlated soft emission in d dimensions we introduce a
class of so... | 2309.11584v1 |
2023-11-01 | Cubic and higher-order supergravity couplings for AdS vacua using Exceptional Field Theory | We show how to use Exceptional Field Theory to efficiently compute $n$-point
couplings of all Kaluza-Klein modes for vacua that can be uplifted from maximal
gauged supergravities to 10/11 dimensions via a consistent truncation. Via the
AdS/CFT correspondence, these couplings encode the $n$-point functions of
holographi... | 2311.00742v1 |
2023-11-21 | The effective field theory approach to the strong coupling issue in $f(T)$ gravity with a non-minimally coupled scalar field | The Hamiltonian analysis for $f(T)$ gravity implies the existence of at least
one scalar-type degree of freedom (DoF). However, this scalar DoF of $f(T)$
gravity does not manifest in linear perturbations around a cosmological
background, which indicates an underlying strong coupling problem. In this work
we expand the ... | 2311.12645v2 |
2023-11-27 | Quantum Carnot thermal machines re-examined: Definition of efficiency and the effects of strong coupling | Whether the strong coupling to thermal baths can improve the performance of
quantum thermal machines remains an open issue under active debate. Here, we
revisit quantum thermal machines operating with the quasi-static Carnot cycle
and aim to unveil the role of strong coupling in maximum efficiency. Our
analysis builds ... | 2311.15465v2 |
2023-12-08 | Engineering synthetic gauge fields through the coupling phases in cavity magnonics | Cavity magnonics, which studies the interaction of light with magnetic
systems in a cavity, is a promising platform for quantum transducers, quantum
memories, and devices with non-reciprocal behaviour. At microwave frequencies,
the coupling between a cavity photon and a magnon, the quasi-particle of a spin
wave excitat... | 2312.04915v3 |
2024-01-07 | The role of resonator neuron in the dynamics of two coupled integrator and resonator neurons of different types of excitability | In this manuscript, a silent resonator neuron is coupled with a spiking
integrator neuron through the gap junction, when the coupled neurons are of
different types of excitability and none of the coupled neurons exhibit mixed
mode oscillations and bursting oscillations intrinsically. By using dynamical
systems theory (... | 2401.03419v1 |
2024-01-09 | Determining the structure of $Hqt$ couplings at the LHC | Experiments at the Large Hadron Collider (LHC) have found that the Higgs
boson discovered in 2012 has properties largely consistent with predictions
from the standard model (SM). However, the determination of the couplings of
the Higgs boson to various other SM particles is not very precise, and it is
possible that fut... | 2401.04551v1 |
1994-05-19 | A Coupling of Pseudo Nambu Goldstone Bosons to Other Scalars and Role in Double Field Inflation | We find a coupling of Pseudo Nambu Goldstone bosons (PNGBs) to other
(ordinary) scalars, and consider its importance in various contexts. Our
original motivation was the model of Double Field inflation [1]. We also
briefly consider the role of this coupling for the case of the QCD axion. | 9405045v1 |
2002-05-14 | Loop Corrections to Scalar Quintessence Potentials | The stability of scalar quintessence potentials under quantum fluctuations is
investigated both for uncoupled models and models with a coupling to fermions.
We find that uncoupled models are usually stable in the late universe. However,
a coupling to fermions is severely restricted. We check whether a graviton
induced ... | 0205206v1 |
2006-01-23 | Bulk viscosity of a gas of neutrinos and coupled scalar particles, in the era of recombination | Bulk viscosity may serve to damp sound waves in a system of neutrinos coupled
to very light scalar particles, in the era after normal neutrino decoupling but
before recombination. We calculate the bulk viscosity parameter in a minimal
scheme involving the coupling of the two systems. We add some remarks on the
bulk vis... | 0601525v1 |
1993-06-09 | Synchronization of coupled maps and stable, dissipative windows | Synchronization among globally coupled, chaotic map lattices can be related
to stable periodic windows in isolated chaotic maps. This relation provides a
simple predictive tool for the understanding of complicated behavior in coupled
physical, chemical and biological systems. | 9306004v1 |
1997-01-13 | Designing coupling that guarantees synchronization between identical chaotic systems | We examine synchronization between identical chaotic systems. A rigorous
criteria is presented which, if satisfied, guarantees that the coupling
produces linearly stable synchronous motion. The criteria can also be used to
design couplings that lead to stable synchronous motion. Analytical results
from a dynamical syst... | 9701011v1 |
1997-09-12 | Fuzzy phase transition in a 1D coupled stable-map lattice | A coupled-map lattice showing complex behavior in presence of a fully
negative Lyapunov spectrum is considered. A phase transition from ordered to
disordered evolution upon changing diffusive coupling is studied in detail.
Various indicators provide a coherent description of the scenario: the
existence of an intermedia... | 9709016v1 |
1999-12-22 | Large Global Coupled Maps with Multiple Attractors | A system of N unidimensional global coupled maps (GCM), which support
multiattractors is studied. We analize the phase diagram and some special
features of the transitions (volume ratios and characteristic exponents), by
controlling the number of elements of the initial partition that are in each
basin of attraction. I... | 9912037v1 |
1994-10-07 | Crossover from Spin-Density-Wave to Neel-like Ground state | The characterization and evolution of a Spin Density Wave into the Quantum
Neel ground state is considered in the context of a weak coupling theory of the
half-filled Hubbard model. Magnetic properties obtained from this weak coupling
approach in one dimension compare favorably with exact results from Bethe
ansatz (BA)... | 9410019v1 |
1996-03-07 | Intensity Fluctuations in Closed and Open Systems | We consider the intensity pattern, generated by a monochromatic source, in a
disordered cavity coupled to the environment. For weak coupling, and when the
source frequency is tuned to a resonance, the intensity distribution is close
to Porter-Thomas distribution. When the coupling increases, gradually crosses
over to t... | 9603057v1 |
1997-05-28 | Coupled Critical Models: Applications to Ising-Potts Models | We discuss the critical behaviour of 2D Ising and q-states Potts models
coupled by their energy density. We found new tricritical points. The procedure
employed is the renormalisation approach of the perturbations series around
conformal field theories representing pure models as already used for
disordered spins model... | 9705292v1 |
1997-08-20 | Some properties of a class of coupled Langevin equations | We present a set of coupled continuum equationswith a specific coupling
between mobile grains $\rho$ and clusters $h$ on the surface of a sandpile. The
equations are analysed self-consistently; we demonstrate that Edwards' infrared
divergence is responsible for the unexpected critical exponents we find, which
are verif... | 9708155v1 |
1997-09-13 | Spin-density Wave in Ising-coupled Antiferromagnetic Chains | The effect of anisotropy in the nearest-neighbor spin interactions that
couple $N\geq 2$ consecutive spin-1/2 antiferromagnetic chains is studied
theoretically by considering the limit where the coupling is purely of the
Ising type. An analysis based on the equivalent Luttinger model reveals that
the groundstate is an ... | 9709153v1 |
1998-03-03 | Theoretical analysis of the resistively-coupled single-electron transistor | The operation of resistively-coupled single-electron transistor (R-SET) is
studied quantitatively. Due to the Nyquist noise of the coupling resistance,
degradation of the R-SET performance is considerable at temperatures $T$ as
small as $10^{-3} e^2/C$ (where $C$ is the junction capacitance) while the
voltage gain beco... | 9803038v1 |
1999-08-20 | Ising cubes with enhanced surface couplings | Using Monte Carlo techniques, Ising cubes with ferromagnetic nearest-neighbor
interactions and enhanced couplings between surface spins are studied. In
particular, at the surface transition, the corner magnetization shows
non-universal, coupling-dependent critical behavior in the thermodynamic limit.
Results on the cri... | 9908291v1 |
2001-03-05 | Parametric phase transition in one dimension | We calculate analytically the phase boundary for a nonequilibrium phase
transition in a one-dimensional array of coupled, overdamped parametric
harmonic oscillators in the limit of strong and weak spatial coupling. Our
results show that the transition is reentrant with respect to the spatial
coupling in agreement with ... | 0103104v1 |
2001-12-03 | Magnetic coupling between mesoscopic superconducting rings | Using the nonlinear Ginzburg-Landau theory we investigated the dependence of
the magnetic coupling between two concentric mesoscopic superconducting rings
on their thickness. The size of this magnetic coupling increases with the
thickness of the rings. | 0112027v1 |
2002-07-25 | Four-wave mixing in coupled semiconductor quantum dots | We present a theoretical analysis of four-wave mixing in coupled quantum dots
subject to inhomogeneous broadening. For the biexciton transitions a clear
signature of interdot-coupling appears in the spectra. The possibility of
experimental observation is discussed. | 0207596v1 |
2002-09-12 | Tetramerisation of a frustrated spin-1/2 chain | We investigate a model of a frustrated spin-1/2 Heisenberg chain coupled to
adiabatic phonons with a general form of magnetoelastic coupling. For large
enough frustration and lattice coupling a new tetramerised phase with three
different bond lengths is found. We argue that the zig-zag spin-1/2 chain
LiV$_2$O$_5$ might... | 0209278v1 |
2003-10-21 | Microscopic Derivation of Magnetic Coupling in Ca3Co2O6 | For cobalt atoms placed along chain structures in Ca3Co2O6, we investigate
the spin exchange coupling between atoms in high spin states. Consistent with
experimental findings, the coupling is weakly ferromagnetic. | 0310500v1 |
2004-05-20 | An asymptotic formula for marginal running coupling constants and universality of loglog corrections | Given a two-loop beta function for multiple marginal coupling constants, we
derive an asymptotic formula for the running coupling constants driven to an
infrared fixed point. It can play an important role in universal loglog
corrections to physical quantities. | 0405466v2 |
2004-07-02 | Dielectric anomaly in coupled rotor systems | The correlated dynamics of coupled quantum rotors carrying electric dipole
moment is theoretically investigated. The energy spectra of coupled rotors as a
function of dipolar interaction energy is analytically solved. The calculated
dielectric susceptibilities of the system show the peculiar temperature
dependence diff... | 0407050v1 |
2005-03-27 | Duality in the Kondo model and perturbative approach to strong coupling theory | We investigate the duality in the Kondo model. Starting from the s-d model
with the coupling constant $J$, the strong coupling model with the constant of
1/J is identified. The model shows the unitary limit of the conductance, $G=2
e^{2}/h$ at zero temperature. The perturbation theory of the model gives
qualitative agr... | 0503633v1 |
2005-08-19 | Influence of spin-orbit interaction on quantum cascade transitions | We have investigated the effect of spin-orbit (SO) coupling on the emission
spectra of a quantum cascade laser. In an externally applied magnetic field
parallel to the electron plane, the SO coupling would result in a double-peak
structure of the optical spectra. This structure can be observed within some
interval of m... | 0508473v1 |
2005-09-09 | Synchronization in large directed networks of coupled phase oscillators | We extend recent theoretical approximations describing the transition to
synchronization in large undirected networks of coupled phase oscillators to
the case of directed networks. We also consider extensions to networks with
mixed positive/negative coupling strengths. We compare our theory with
numerical simulations a... | 0509255v1 |
2006-03-20 | Enhanced Shot Noise in Tunneling through a Stack of Coupled Quantum Dots | We have investigated the noise properties of the tunneling current through
vertically coupled self-assembled InAs quantum dots. We observe
super-Poissonian shot noise at low temperatures. For increased temperature this
effect is suppressed. The super-Poissonian noise is explained by capacitive
coupling between differen... | 0603512v1 |
2006-10-26 | Coupled Breathing Oscillations of Two-Component Fermion Condensates in Deformed Traps | We investigate collective excitations coupled with monopole and quadrupole
oscillations in two-component fermion condensates in deformed traps. The
frequencies of monopole and dipole modes are calculated using Thomas-Fermi
theory and the scaling approximation. When the trap is largely deformed, these
collective motions... | 0610727v1 |
2007-01-11 | Some exact identities connecting one- and two-particle Green's functions in spin-orbit coupling systems | Some exact identities connecting the one- and two-particle Green's functions
in the presence of spin-orbit coupling have been derived. These identities is
similar to the usual Ward identity in the particle or charge transport theory
and a satisfying spin transport theory in spin-orbit coupling system should
also preser... | 0701227v1 |
1995-10-11 | Dilaton Gravity with a Non-Minimally Coupled Scalar Field | We discuss the two-dimensional dilaton gravity with a scalar field as the
source matter. The coupling between the gravity and the scalar, massless, field
is presented in an unusual form. We work out two examples of these couplings,
and solutions with black-hole behaviour are discussed and compared with those
found in t... | 9510021v1 |
1996-10-10 | Slow Roll Inflation in Non-Minimally Coupled Theories: Hyperextended Gravity Approach | The slow roll approximation is studied for cosmological models in
Hyperextended Scalar-Tensor Theories of Gravity. A procedure to obtain slow
roll solutions in non-minimally coupled gravity is outlined and some examples
are provided. An integral condition over the functional form of the non-minimal
coupling is imposed ... | 9610021v1 |
1996-11-22 | Conformal Couplings in Induced Gravity | It is found that the induced gravity with conformal couplings requires the
conformal invariance in both classical and quantum levels for consistency. This
is also true for the induced gravity with an extended conformal coupling
interacting with torsion. | 9611053v1 |
1999-04-07 | Conformally Coupled Induced Gravity with Gradient Torsion | It is found that conformally coupled induced gravity with gradient torsion
gives a dilaton gravity in Riemann geometry. In the Einstein frame of the
dilaton gravity the conformal symmetry is hidden and a non-vanishing
cosmological constant is not plausible due to the constraint of the conformal
coupling. | 9904018v1 |
2000-06-10 | Self-similar spherically symmetric wave maps coupled to gravity | We investigate spherically symmetric continuously self-similar (CSS)
solutions in the SU(2) sigma model coupled to gravity. Using mixed numerical
and analytical methods, we provide evidence for the existence (for small
coupling) of a countable family of regular CSS solutions. This fact is argued
to have important impli... | 0006034v1 |
2003-10-08 | Chaotic self-similar wave maps coupled to gravity | We continue our studies of spherically symmetric self-similar solutions in
the SU(2) sigma model coupled to gravity. For some values of the coupling
constant we present numerical evidence for the chaotic solution and the fractal
threshold behavior. We explain this phenomenon in terms of horseshoe-like
dynamics and hete... | 0310050v2 |
2005-02-10 | Feynman diagams coupled to three-dimensional quantum gravity | A framework for quantum field theory coupled to three-dimensional quantum
gravity is proposed. The coupling with quantum gravity regulates the Feynman
diagrams. One recovers the usual Feynman amplitudes in the limit as the
cosmological constant tends to zero. | 0502048v2 |
1999-11-02 | Tau Electroweak Couplings | We review world-average measurements of the tau lepton electroweak couplings,
in both decay (including Michel parameters) and in production ($Z^0\to
\tau^+\tau^-$ and $W^-\to\tau^-\nubar_\tau$). We review the searches for
anomalous weak and EM dipole couplings. Finally, we present the status of
several other tau lepton... | 9911002v1 |
2000-05-15 | Search for Anomalous ZZgamma and Zgammagamma couplings in the process e+e- -> Zgamma at LEP | We search for anomalous trilinear gauge couplings in the ZZgamma and
Zgammagamma vertices using data collected with the L3 detector at LEP at a
centre-of-mass energy \sqrt{s}=189 GeV. No evidence is found and limits on
these couplings and on new physics scales are derived from the analysis of the
process e+e- -> Zgamma... | 0005024v1 |
1994-12-23 | Asymptotic scaling from strong coupling in 2-d lattice chiral models | Two dimensional $N=\infty$ lattice chiral models are investigate by a strong
coupling analysis. Strong coupling expansion turns out to be predictive for the
evaluation of continuum physical quantities, to the point of showing asymptotic
scaling (within 5\%). | 9412097v1 |
1995-11-13 | Lattice Investigations of the Running Coupling | A review of investigations of running couplings using lattice techniques is
given. This includes i) studies of the running of particular non-perturbatively
defined renormalized couplings in pure gauge theories over a range of energies,
and ii) how estimates of $\alpha_{\overline{MS}}(m_Z)$ in lattice QCD are
presently ... | 9511017v1 |
1997-10-02 | A Note on the Action in d>4 Dynamical Triangulations | For dynamical triangulations in dimensions d<=4 the most general action has
two couplings. We note that the most general action for d=5 has three
couplings. We explore this larger coupling space using Monte Carlo simulations.
Initial results indicate evidence for non-trivial phase structure. | 9710014v1 |
1997-12-03 | Monte Carlo Simulation Calculation of Critical Coupling Constant for Continuum φ^4_2 | We perform a Monte Carlo simulation calculation of the critical coupling
constant for the continuum {\lambda \over 4} \phi^4_2 theory. The critical
coupling constant we obtain is [{\lambda \over \mu^2}]_crit=10.24(3). | 9712008v1 |
1999-09-04 | Strongly coupled 't Hooft model on the lattice | A lattice strong coupling calculation of the spectrum and chiral condensate
of the 't Hooft model is presented. The agreement with the results of the
continuum theory is strikingly good even at the fourth order in the strong
coupling expansion. | 9909027v1 |
1999-09-14 | N=1 Super Yang-Mills on the Lattice in the Strong Coupling Limit | We study the N=1 supersymmetric SU(N) Yang-Mills theory on the lattice at
strong coupling. We analyse and discuss the recent results obtained at strong
coupling and large N for the mesonic and fermionic propagators and spectrum. | 9909113v1 |
2001-10-31 | Schrödinger functional at N_f=-2 | We study the Schr\"odinger functional coupling for lattice Yang-Mills theory
coupled to an improved bosonic spinor field, which corresponds to QCD with
minus two light flavors. This theory serves as a less costly testcase than QCD
for the scaling of the coupling. | 0110224v1 |
2002-08-27 | Strongly coupled N=1 SYM theory on the lattice | We propose a strong coupling expansion as a possible tool to obtain
qualitative and quantitative informations about N=1 SYM theory. We point out
the existence of a mapping between strongly coupled lattice N=1 SYM theory and
a generalized SO(4) antiferromagnetic spin system. | 0208061v1 |
2005-12-25 | The behavior of the sextic coupling for the the three-dimensional $φ^4 $ theory | In this work we use the lattice regularization method to study the behavior
of the six point renormalized coupling constant defined at zero momentum for
the three-dimensional $\phi^4 $ theory in the intermediate and strong coupling
domain. The result is in good agreement with the corresponding study in the
Ising limit. | 0512037v1 |
1992-09-15 | Anomalous Gauge-Boson Couplings at Hadron Supercolliders | We discuss anomalous gauge boson couplings at hadron supercolliders. We
review the usual description of these couplings, as well as the studies of a
strongly interacting electroweak symmetry breaking sector. We present an
effective field theory formulation of the problem that relates the two
subjects, and that allows a... | 9209237v1 |
1994-12-01 | High-colour pomerons with a running coupling constant in the Hartree-Fock approximation | The Hartree-Fock approximation is applied to study the "high-colour pomerons"
in the system of many reggeized gluons with a running QCD coupling constant. It
is shown that, contrary to the fixed coupling case, the high-colour pomerons
result supercritical, although with a smaller intercept than the multipomeron
states. | 9412202v1 |
1995-01-09 | TESTING THE $WWγ$ COUPLING AT $e^+e^-$ COLLIDERS | The production of single photons plus missing energy at future $e^{+}e^{-}$
colliders can provide a testing ground for non-standard $WW\gamma$ couplings.
We show that even with conservative estimates of systematic errors there is
still considerable sensitivity to anomalous couplings. | 9501237v1 |
1995-04-24 | Selection Rules for Nonrenormalizable Couplings in Superstring Theories | We study nonrenormalizable coupling terms in $Z_N$ orbifold models.
Nontrivial selection rules of couplings are provided and cannot be understood
in terms of a simple symmetry of effective field theories. We also discuss
phenomenological implications of theses selection rules for the quark mass
matrices. | 9504371v1 |
1995-10-11 | Self-Couplings of Electroweak Bosons: Theoretical Aspects and Tests at Hadron Colliders | The current theoretical understanding of anomalous gauge boson couplings is
reviewed, and the direct measurement of these couplings in present and future
hadron collider experiments is briefly discussed. | 9510265v1 |
1995-11-21 | Structure of Pomeron Couplings and Single-Spin Asymmetry in Diffractive $Q \bar Q$ Production | Transverse single spin asymmetry in polarized diffractive $Q \bar Q$
production is calculated. It is shown that this asymmetry depends strongly on
the spin structure of the pomeron coupling, which permits one to study the
pomeron couplings properties in future polarized experiments. | 9511382v1 |
1996-02-14 | Proton lifetime, Yukawa couplings and dynamical SUSY breaking in SU(5) GUT | We study the influence of messenger Yukawa couplings and top, bottom and
$\tau$ Yukawa couplings on the proton lifetime in SU(5) Supersymmetric GUT with
dynamical supersymmetry breaking mechanism due to Dine and Nelson. | 9602310v1 |
1997-09-11 | Non-decoupling effects due to a dimensionful coupling | We show that the dimensionful scalar cubic coupling in 3+1 dimensions gives
rise to non-decoupling effects and analyze the behavior of these effects. In
the process, we clarify how it is perturbatively consistent to construct
theories in which the cubic coupling is dominant. We use the scalar sector of
the Supersymmetr... | 9709309v1 |
1997-11-18 | Quark-Gluon Coupling in the Global Colour Model of QCD | The Global Colour Model of QCD is used in conjunction with a pure-gluon
lattice correlator (by Marenzoni et al.) to extract from meson data a
momentum-dependent quark-gluon coupling down to $s \approx 0.3 GeV^2$. This is
compared with a lattice calculation (by Skullerud) of the quark-gluon coupling. | 9711359v1 |
1999-02-25 | g_{K LAMBDA N} and g_{K SIGMA N} coupling constants in light cone QCD sum rules | The strong coupling constants g_{K LAMBDA N} and g_{K SIGMA N} for the
structure (sigma_{mu,nu} gamma_5) are calculated within light cone QCD sum
rules. A comparison of our results on these couplings with predictions from
traditional QCD sum rules is presented. | 9902466v1 |
1999-04-11 | Pion--baryon coupling constants in light cone QCD sum rules | We calculate the "pi Sigma Lambda" and "pi Sigma Sigma" coupling constants in
light cone QCD sum rules for the structure "sigma_{alpha beta} gamma_5 p^alpha
q^beta". A comparison of our results on these coupling constants with
prediction of the SU(3) symmetry is presented. | 9904296v2 |
1999-04-20 | Proton Spin Based On Chiral Dynamics | Chiral spin fraction models agree with the proton spin data only when the
chiral quark-Goldstone boson couplings are pure spinflip. For axial-vector
coupling from soft-pion physics this is true for massless quarks but not for
constituent quarks. Axial-vector quark-Goldstone boson couplings with {\bf
constituent} quarks... | 9904405v1 |
1999-11-24 | Diffractive hadron production and pomeron coupling structure | Large-distance effects, which lead to the spin-flip part of the hadron
-pomeron coupling in QCD -models, are discussed. We study spin asymmetries in
exclusive reactions and in diffractive $Q \bar Q$ and vector meson production
which are sensitive to the spin-dependent part of the pomeron coupling. | 9911469v1 |
2000-06-22 | A Calculation of Higgs Mass in the Standard Model | The assumption that the ratio of the Higgs self-coupling to the square of its
yukawa coupling to the top is (almost) independent of the renormalization scale
fixes the Higgs mass within narrow limits at m=160 GeV using only the values of
gauge couplings and top mass. | 0006258v1 |
2004-03-05 | Calculation of coupling constant g_phi-pi-gamma in QCD sum rules | The coupling constant of g_phi-pi-gamma decay is calculated in the method of
QCD sum rules. A comparison of our prediction on the coupling constant with the
result obtained from analysis of the experimental data is performed. | 0403060v1 |
2004-09-27 | Quartic gauge couplings from e+e- -> WWZ | Effective anomalous quartic gauge couplings on tree level appear, e.g., in a
strong interacting Higgs scenario. We present a status report on our study on
triple boson production sensitive to these couplings. The study is done for
parameters of a future linear collider. | 0409305v1 |
2004-10-14 | Gauge boson couplings at LEP | A review is given of the measurements of triple and quartic couplings among
the electroweak gauge bosons performed at LEP by the four experiments ALEPH,
DELPHI, L3 and OPAL. Emphasis is placed on recently published results and on
combinations of results performed by the LEP electroweak gauge-couplings group.
All measur... | 0410208v1 |
2005-01-20 | A Charge-Conjugation-Invariance Constrained Pomeron-Quark Coupling | The commonly used $\gamma_{\mu}} Pomeron-quark coupling changes its sign
under charge conjugation, in contradiction to the property of Pomeron. I show
that the Pomeron-quark coupling is tensorial and is invariant under the charge
conjugation. | 0501195v1 |
2005-03-14 | Coupling constants g_a0-omega-gamma as derived from light cone QCD sum rules | We investigate the a0-omega-gamma vertex and estimate the coupling constant
in the framework of the light cone QCD sum rules. We compare our result with
the value of the coupling constant was calculated in the QCD sum rules. | 0503128v2 |
2005-07-28 | The Quartic Higgs Coupling at Hadron Colliders | The quartic Higgs self-coupling is the final measurement in the Higgs
potential needed to fully understand electroweak symmetry breaking. None of the
present or future colliders are known to be able to determine this parameter.
We study the chances of measuring the quartic self-coupling at hadron colliders
in general a... | 0507321v1 |
2006-01-16 | Running coupling and screening in the (s)QGP | Emphasizing the importance of renormalization in the context of thermal field
theory in general, it is pointed out that the Debye mass in the hot quark gluon
plasma is determined by the coupling at the scale $m_D$, not $T$ as commonly
presumed. The mended result agrees quantitatively with lattice QCD calculations
in th... | 0601119v2 |
2006-03-06 | g_a0-rho-gamma and g_f0-rho-gamma coupling constants in three point QCD sum rules | The coupling constant of a0-->rho-gamma and f0-->rho-gamma decays are
calculated using 3-point sum rule. We estimate the coupling constant
g_a0-rho-gamma and g_f0-rho-gamma which are an essential ingredient in the
analysis of physical processes involving isoscalar f0(980) and isovector
a0(980) mesons. | 0603045v1 |
1993-06-23 | Exact Solution for the Most General Minimally Coupled One Dimensional Lattice Gauge Theory | We consider one dimensional lattice gauge theories constructed by the minimal
coupling prescription. It is shown that these theories are exactly solvable in
the thermodynamic limit. After considering the most general case, we discuss
some special cases on finite lattices, and also work out some examples. There
is no ph... | 9306121v1 |
1994-01-12 | Nonrenormalization Theorem for Gauge Coupling in 2+1D | We prove that $\be$-function of the gauge coupling in $2+1D$ gauge theory
coupled to any renormalizable system of spinor and scalar fields is zero. This
result holds both when the gauge field action is the Chern-Simons action and
when it is the topologically massive action. | 9401053v1 |
1994-03-15 | Strong Coupling Phase of Chiral Gross Neveu Model | We perform the numerical simulation of the two dimensional chiral Gross Neveu
model using the Kogut-Susskind(KS) fermion. In the case of SU(4), the
Kosterlitz-Thouless phase transition happens at some critical value of the
coupling constant. In the case of one flavour, there exists the strong coupling
phase in which th... | 9403078v1 |
1996-01-22 | CP^{N-1} models and the Quantized 2D Black Holes | We have examined the coupled system of the dilaton gravity and the $CP^{N-1}$
theory known as a model of the confinement of massive scalar quarks. After the
quantization of the system, we could see the quantum effect of the gravitation
on the coupling constant of $CP^{N-1}$ model and how the coupling constant of
dynami... | 9601110v1 |
1996-03-22 | Coupling supergravity to non-supersymmetric matter | By introducing a nonlinearly transforming goldstino field
non-super\-sym\-metric matter can be coupled to supergravity. This implies the
possibility of coupling a standard model with one Higgs to supergravity. | 9603148v2 |
1996-05-06 | I-Brane Inflow and Anomalous Couplings on D-Branes | We show that the anomalous couplings of $D$-brane gauge and gravitational
fields to Ramond-Ramond tensor potentials can be deduced by a simple anomaly
inflow argument applied to intersecting $D$-branes and use this to determine
the eight-form gravitational coupling. | 9605033v1 |
1996-11-07 | Relativistic QFTH - Couplings on the Worldline | In the framework of the worldline path integral approach to QFTH we discuss
spin and relativistic couplings, in particular Yukawa and axial couplings to
spin 1/2, and the case of spin 1 in the loop. | 9611044v1 |
1997-07-24 | Singular Yukawa and gauge couplings in d=4 Heterotic String Vacua | In this paper we discuss the singularities in the Yukawa and gauge couplings
of N=1 compactifications of the SO(32) heterotic string in four space-time
dimensions. Such singularities can arise from the strong coupling dynamics of a
confined non-perturbative gauge group. | 9707212v1 |
1997-12-17 | Tensor Multiplets in Six-Dimensional (2,0) Supergravity | We construct the complete coupling of $(2,0)$ supergravity in six dimensions
to $n$ tensor multiplets, extending previous results to all orders in the fermi
fields. The truncation to $(1,0)$ supergravity coupled to tensor multiplets
exactly reproduces the complete couplings recently obtained. | 9712176v1 |
1998-12-17 | (Non-)Anomalous D-brane and O-plane couplings: the normal bundle | The direct string computation of anomalous D-brane and orientifold plane
couplings is extended to include the curvature of the normal bundle. The
normalization of these terms is fixed unambiguously. New, non-anomalous
gravitational couplings are found. | 9812149v2 |
1999-04-23 | Pauli's Term and Fractional Spin | In this work we consider an Abelian Chern-Simons-Higgs model coupled
non-minimally to matter fields. This coupling is implemented by means of a
Pauli-type coupling. We show that the Pauli term is sufficient to gives rise to
fractional spin. | 9904159v1 |
1999-04-29 | Finiteness of 2D Topological BF-Theory with Matter Coupling | We study the ultraviolet and the infrared behavior of 2D topological
BF-Theory coupled to vector and scalar fields. This model is equivalent to 2D
gravity coupled to topological matter. Using techniques of the algebraic
renormalization program we show that this model is anomaly free and ultraviolet
as well as infrared ... | 9904204v1 |
1999-05-21 | Ramond-Ramond couplings of non-BPS D-branes | We study how non-BPS type II D-branes couple to R-R potentials. Upon tachyon
condensation the couplings we find give rise to the Wess-Zumino action of BPS
D-branes. | 9905157v2 |
2000-03-06 | Quantisation of Extended Objects | The `strong-coupling' perturbation theory over the inverse interaction
constant $1/g$ near the nontrivial solution of Lagrange equation is formulated.
The ordinary `week-coupling' perturbation theory over $g$ is described also to
compare both perturbation theories. The `strong-coupling' perturbation theory
is developed... | 0003039v1 |
2001-07-17 | Gauge Couplings and Group Dimensions in the Standard Model | The gauge field term in the Standard Model Lagrangian is slightly rewritten,
suggesting that the three gauge couplings have absorbed factors which depend on
the dimensions of the corresponding gauge groups. The ratios of the physical
couplings may turn out to be dominated by these factors, with deviations due to
quantu... | 0107144v1 |
2002-09-18 | Vanishing of the Bare Coupling in Four Dimensions | We examine two restructurings of the series relationship between the bare and
renormalized coupling constant in dimensional regularization. In one of these
restructurings, we are able to demonstrate via all-orders summation of leading
and successive epsilon = 0 (dimensionality = 4) poles that the bare coupling
vanishes... | 0209151v2 |
2003-03-03 | Heterotic Yukawa couplings and continuous Wilson lines | Realistic heterotic string models require the presence of the Wilson lines.
We study the effect of continuous Wilson lines on the heterotic Yukawa
couplings and find that the presence of continuous Wilson lines affects the
magnitude of the twisted Yukawa couplings resulting in their stronger
hierarchy. | 0303009v2 |
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