Tensor Particles Research Articles

Phenomenology of dark tensor currents

In this work we suggest a dark mediator model which extends the usual U(1) Lagrangian by including new degrees of freedom coupling to Standard Model fermions. Such dark particles can contribute to the neutral pion decay. For interaction constant and the dark particle mass consistent with the observed anomalies in the nuclear decays by the ATOMKI group we show that the dark tensor particles naturally incorporate lepton universality violation which introduces sizable effect on the muon anomalous magnetic moment.

Collider constraints on massive gravitons coupling to photons

We study the discovery potential of massive graviton-like spin-2 particles coupled to standard model fields, produced in photon-photon collisions at the Large Hadron Collider (LHC) as well as in electron-positron (e+e−) collisions, within an effective theory with and without universal couplings. Our focus is on a massive graviton G coupled to the electromagnetic field, which decays via G→γγ and leads to a resonant excess of diphotons over the light-by-light scattering continuum at the LHC, and of triphoton final states at e+e− colliders. Based on similar searches performed for pseudoscalar axion-like particles (ALPs), and taking into account the different cross sections, γγ partial widths, and decay kinematics of the pseudoscalar and tensor particles, we reinterpret existing experimental bounds on the ALP-γ coupling into G-γ ones. Using the available data, exclusion limits on the graviton-photon coupling are set down to gGγ≈1–0.05 TeV−1 for masses mG≈100 MeV–2 TeV. Such bounds can be improved by factors of 100 at Belle II in the low-mass region, and of 4 at the HL-LHC at high masses, with their expected full integrated luminosities.

Helmholtz Hamiltonian Mechanics Electromagnetic Physics Gaging Charge Fields Having Novel Quantum Circuitry Model

This article shows novel model Pauli-Dirac-Planck-quantum-circuit-assembly-gage, consisting of the monopole quasiparticles and electron-positron particle fields, demonstrating power of Iyer Markoulakis Helmholtz Hamiltonian mechanics of point vortex and gradient fields general formalism. Transforming this general metrics to Coulombic gaging metrics and performing gage charge fields calculations, derivation of assembly eigenvector matrix bundle constructs of magnetic monopoles, and electron positron particle gage metrics were successfully compiled, like SUSY (?( 1 &?@?*&1 )) Hermitian quantum matrix., modified to asymmetric strings gage metrics to account for asymmetrical magnetic pole forces measurements recently in physics. Physical analysis with graphics discussing scenarios of electric tensor particles and magnetic tensor monopoles permutationally interacting, figures showing simulations of fermions’ spins with Clifford algebraic geometry, and the graphs explaining vortex sinusoidal pulsed signal output distribution profile of typical equivalent wave velocity of the related point fields partially verify this quantum circuity assembly model. Table shows estimated size of this assembly greater than 10-34 Planck unit and less than quasi-particle size of 10-26 metrics unit. Wide-ranging applications of this quantum circuitry assembly model exist for quantum supercomputing expertise antenna networks, alongside quantum astrophysical grand unifying genesis of electromagnetic gravitational matter antimatter systems. This quantum model can be verified by experimental techniques, such as spin-ice and Bose-Einstein condensate spinors.

Helmholtz Hamiltonian Mechanics Electromagnetic Physics Gaging Charge Fields Having Novel Quantum Circuitry Model

This article shows novel model Pauli-Dirac-Planck-quantum-circuit-assembly-gage, consisting of the monopole quasiparticles and electron-positron particle fields, demonstrating power of Iyer Markoulakis Helmholtz Hamiltonian mechanics of point vortex and gradient fields general formalism. Transforming this general metrics to Coulombic gaging metrics and performing gage charge fields calculations, derivation of assembly eigenvector matrix bundle constructs of magnetic monopoles, and electron positron particle gage metrics were successfully compiled, like SUSY (?( 1 &?@?*&1 )) Hermitian quantum matrix., modified to asymmetric strings gage metrics to account for asymmetrical magnetic pole forces measurements recently in physics. Physical analysis with graphics discussing scenarios of electric tensor particles and magnetic tensor monopoles permutationally interacting, figures showing simulations of fermions’ spins with Clifford algebraic geometry, and the graphs explaining vortex sinusoidal pulsed signal output distribution profile of typical equivalent wave velocity of the related point fields partially verify this quantum circuity assembly model. Table shows estimated size of this assembly greater than 10-34 Planck unit and less than quasi-particle size of 10-26 metrics unit. Wide-ranging applications of this quantum circuitry assembly model exist for quantum supercomputing expertise antenna networks, alongside quantum astrophysical grand unifying genesis of electromagnetic gravitational matter antimatter systems. This quantum model can be verified by experimental techniques, such as spin-ice and Bose-Einstein condensate spinors.

Several BBN Constraints on Beyond Standard Model Physics

We present several Big Bang Nucleosynthesis constraints on nonequilibrium processes in the Early Universe, representing Beyond Standard Model Physics, including neutrino oscillations, processes with considerable lepton asymmetry, with sterile neutrinos, chiral tensor particles (CTP) interactions, etc.

Cosmological constraints on chiral tensor particles

We discuss an extended model with chiral tensor particles in the Universe. Their direct influence on the Universe dynamics and their characteristic interactions in the hot Universe plasma, considered in the previous publications, are briefly reviewed. A short discussion on the contemporary cosmological bounds on effective number of the relativistic degrees of freedom is provided. Cosmological constraints on the tensor particles interactions strength are obtained, corresponding to different cosmological bounds on the relativistic degrees of freedom and for different assumptions about right-handed neutrinos.

Search for heavy resonances decaying into WW in the enu mu nu final state in pp collisions at sqrt{s}=13,text {TeV} with the ATLAS detector

A search for neutral heavy resonances is performed in the WWrightarrow enu mu nu decay channel using pp collision data corresponding to an integrated luminosity of 36.1,hbox {fb}^{-1}, collected at a centre-of-mass energy of 13,text {TeV} by the ATLAS detector at the Large Hadron Collider. No evidence of such heavy resonances is found. In the search for production via the quark–antiquark annihilation or gluon–gluon fusion process, upper limits on sigma _Xtimes B(X rightarrow WW) as a function of the resonance mass are obtained in the mass range between 200,text {GeV} and up to 5,text {TeV} for various benchmark models: a Higgs-like scalar in different width scenarios, a two-Higgs-doublet model, a heavy vector triplet model, and a warped extra dimensions model. In the vector-boson fusion process, constraints are also obtained on these resonances, as well as on a Higgs boson in the Georgi–Machacek model and a heavy tensor particle coupling only to gauge bosons.

Chiral tensor particles in the early Universe — Present status

In this work, an update of the cosmological role and place of the chiral tensor particles in the Universe history is provided. We discuss an extended model with chiral tensor particles. The influence of these particles on the early Universe evolution is studied. Namely, the increase of the Universe expansion rate caused by the additional particles in this extended model is calculated, their characteristic interactions with the particles of the hot Universe plasma are studied and the corresponding times of their creation, scattering, annihilation and decay are estimated for accepted values of their masses and couplings, based on the recent experimental constraints. The period of abundant presence of these particles in the Universe evolution is determined.

Dynamical friction in a relativistic plasma

The work of Spitzer on dynamical friction in a plasma [L. Spitzer, Jr., Physics of Fully Ionized Gases, 2nd ed. (Wiley, New York, 1962), Chap. 5] is extended to relativistic systems. We derive the force of dynamical friction, diffusion tensor, and test particle relaxation rates for a Maxwellian background in the same form as Trubnikov [B. A. Trubnikov, in Reviews of Plasma Physics, edited by M. A. Leontovich (Consultants Bureau, New York, 1965), Vol. 1, p. 105], enabling high-temperature laboratory and astrophysical plasmas to be modeled in a consistent manner.

Magnetic dipole moment of the light tensor mesons in light cone QCD sum rules

The magnetic dipole moments of the light tensor mesons f2, a2 and the strange K*02(1430) tensor meson are calculated in the framework of the light cone QCD sum rules. It is observed that the values of the magnetic dipole moment for the charged tensor particles are considerably different from zero. These values are very close to zero for the light neutral f2 and a2 tensor mesons, while it has a small nonzero value for the neutral strange K*02(1430) tensor meson.

SPEEDING THE FRIEDMANN EXPANSION BY CHIRAL TENSOR PARTICLES

The status of the chiral tensor particles in the extended electroweak model, their experimental constraints, signatures and the possibilities for their detection at the new colliders are shortly reviewed. The cosmological effects of the additional particles are discussed. Namely, their characteristic interactions with the other components of the early Universe plasma and the corresponding cosmic times and temperatures are determined. The dynamical cosmological effect, namely the speeding of the Friedmann expansion due to the density increase caused by the chiral tensor particles and the additional Higgs doublet is discussed. The presence of the chiral tensor particles is allowed from cosmological considerations and welcomed by the particle physics phenomenology.

Regge-trajectory analysis ofDSJ⋆(2317)±,DSJ(2460)±andDSJ(2632)+mesons

Status of investigations of the new observed charmed strange mesons D{sub SJ}*(2317){sup {+-}}, D{sub SJ}(2460){sup {+-}} and D{sub SJ}(2632){sup +} is simply reviewed. A systemic classification to these states with Regge trajectories (RTs) was made. We found that D{sub SJ}*(2317){sup {+-}} and D{sub SJ}(2460){sup {+-}} are reasonable to be arranged as (0{sup +},1{sup +}) states, but D{sub SJ}(2632){sup +} seems not possible to be an orbital excited tensor particle. As a byproduct, the nonstrange charmed mesons including D{sub 1}{sup '}(2427) and D*(2637){sup +} were analyzed also.

Non-leptonic decays of the Bc into tensor mesons

We have computed the branching ratios of the exclusive pseudoscalar (vector) + tensor modes that are allowed in the decays of the Bc meson. The dominant spectator and annihilation contributions in those decays are evaluated using the factorization hypothesis. We find that some of these decay channels, such as Bc− → (ρ−, Ds*−, Ds−)χc2 and Bc− → π−, have branching ratios of the order of 10−4, which seems to be within the reach of forthcoming experiments at the LHC. The inclusive branching fraction of the two-body Bc decays involving tensor particles is approximately 1.28 × 10−3. At the dynamical level, it is interesting to observe that the exclusive decays Bc− → K−(π−), π0 D2*−, η′Ds2*− are dominated by the annihilation contributions.

Numerical validation of velocity gradient tensor particle trackingvelocimetry for highly deformed flow fields

Particle tracking velocimetry (PTV) has recently been recognized asquite an effective engineering research tool for understandingmulti-dimensional fluid flow structures. There are, however, still a number ofunsettled problems in the practical use of PTV, i.e. the lack of generalityof the PTV algorithm for various types of flows and the measurementuncertainty with respect to spatial resolution. The authors have developed ageneralized PTV algorithm named the velocity gradient tensor (VGT) method inorder to accurately track the tracer particles in a flow field with stronglocal deformation rates. The performance of the VGT method has already beenexamined for several simple flow fields, such as linear shearing andTaylor-Green vortex flows. In this paper, the applicability of the VGT methodfor complicated flows, which include a wide dynamic range in wavenumber, isquantitatively examined by simulation of Rankine vortex flows, Karmanvortex-shedding flows around a rectangular cylinder and homogeneous turbulentflows, which are numerically solved by using the unsteady Navier-Stokesequations. The results show that the VGT technique, using only two frames toestimate velocity, performs better than does the four-frame PTV technique andhas a remarkably higher tracking performance than those of typicalconventional PTV algorithms.

Is there cosmological evidence for additional particles?

Abstract An extended cosmological model of the early Universe with additional antisymmetric tensor particles is described. The cosmological effects of the additional particles, namely, additional interactions of the early Universe plasma with the tensor particles, a shift of the early Universe temperature-time dependence and the total energy density increase are discussed. The efficiency of the tensor particle interactions with early Universe plasma components and their corresponding cosmological time and temperature are determined.

Intermediate scalars and the effective string model of black holes

We consider five-dimensional black holes modeled by D-strings bound to D5-branes, with momentum along the D-strings. We study the greybody factors for the non-minimally coupled scalars which originate from the gravitons and R-R antisymmetric tensor particles polarized along the 5-brane, with one index along the string and the other transverse to the string. These scalars, which we call intermediate, couple to the black holes differently from the minimal and the fixed scalars which were studied previously. Analysis of their fluctuations around the black hole reveals a surprising mixing between these NS-NS and R-R scalars. We disentangle this mixing and obtain two decoupled scalar equations. These equations have some new features, and we are able to calculate the greybody factors only in certain limits. The results agree with corresponding calculations in the effective string model provided one of the intermediate scalars couples to an operator of dimension (I,2), while the other to an operator of dimension (2,I). Thus, the intermediate scalars are sensitive probes of the chiral operators in the effective string action.

On t-quark decay

An extended electroweak model with second-rank antisymmetric tensor fields was proposed. The effective interactions resulting from the exchange of these fields have a specific dependence on the momentum transfer. This leads to the introduction of new model-independent muon decay parameters (M.V. Chizhov, Mod. Phys. Lett. A 9 (1994) 2979), which can be measured experimentally in SLAC and TRIUMF. The new tensor interactions can affect the three-particle semileptonic meson decays (M.V. Chizhov, Mod. Phys. Lett. A 8 (1993) 2753). In this connection it will be interesting to carry out new experiments on K + → l + νγ, K + → π 0 l + ν decays at DAφNE. The K L-K S mass difference sets constraints to the tensor particles masses. The mass of the lightest tensor particle could be less than the t-quark mass. Therefore, the lightest tensor particle may give an additional W-boson contribution to the t-quark decay with the same signature. In this Letter we have calculated the contribution of the new tensor particles to the t-quark decay.

The size of p-branes

We obtain form factors for scattering of gravitons and anti-symmetric tensor particles off Dirichlet p-branes in Type II superstring theory. As expected, the form factor of the −1-brane (the D-instanton) exhibits point-like behavior: in fact it is saturated by the dilaton tadpole graph. In contrast, p-branes with p > −1 acquire size of order the string scale due to quantum effects and exhibit Regge behavior. We find their leading form factors in closed form and show that they contain an infinite sequence of poles associated with p-brane excitations. Finally, we argue that the p-brane form factors for scattering of R-R bosons will have the same stringy features found with NS-NS states.

The one-loop closed bosonic string amplitude with external gravitons, antisymmetric tensor fields and dilations

The one-loop amplitude of the closed bosonic string with M (⩽ 26) external massless tensor particles is calculated in the oscillator formalism. The result is expressed in term of multilinear parts of exponentials of polarization tensors. The two-point function is obtained explicitly, and shown to be doubly periodic and modular invariant.

Gravitational waves and massive tensor particles in thef-g theory of gravity

Starting from the generally covariant version of the Pauli-Fierz mass term, it is stressed that the tensor fields representing spin-2 particles, eigenstates of strong and gravitational interactions, are linear combinations of one massive and one massless state. This implies that any hadronic reaction, in which massive tensor particles are produced, can be regarded, at least in principle, also as an effective source of gravitons which may become very important in the early stages of the universe; conversely, any process in which gravitational radiation of sufficiently high energy is emitted, should be a source of strongly interacting tensor particles which decay into photons and neutrinos. These two effects could be used for producing and detecting gravitational waves.