Results 31 to 40 of about 2,171,046 (195)

Particle production in the oscillating inflation model [PDF]

, 2000
We investigate the particle production of a scalar field $\chi$ coupled to an inflaton field $\phi$ ($g^2\phi^2\chi^2/2$) in the {\it oscillating inflation} model, which was recently proposed by Damour and Mukhanov. Although the fluctuation of the $\phi$
A. D. Dolgov, A. D. Linde, A. H. Guth, A. R. Liddle, A. R. Liddle, A. Taruya, B. A. Bassett, B. A. Bassett, B. R. Greene, D. Boyanovsky, D. Boyanovsky, D. Boyanovsky, D. Boyanovsky, D. Boyanovsky, D. Cormier, D. H. Lyth, D. I. Kaiser, D. I. Kaiser, D. T. Son, E. W. Kolb, E. W. Kolb, E. W. Kolb, F. Finelli, H. Kodama, I. I. Tkachev, I. I. Tkachev, J. Baacke, J. Baacke, J. Baacke, J. Garcia-Bellido, J. Traschen, K. Sato, K. Sato, L. F. Abbott, L. Kofman, L. Kofman, L. Kofman, M. Parry, N. W. Mac Lachlan, P. B. Greene, S. Kasuya, S. Kasuya, S. Khlebnikov, S. Khlebnikov, S. Khlebnikov, S. Khlebnikov, S. Tsujikawa, S. Tsujikawa, Shinji Tsujikawa, T. Damour, T. Prokopec, Y. Nambu, Y. Shatanov   +52 more
core   +2 more sources

Primitive particle model

Physics Letters B, 1978
Abstract The present pattern of six almost identical SU(2)L × U(1) quark or lepton doublet-singlet sets appears to indicate that all matter is “made” of one fundamental fermion set (α0, α−)L, αR0, αR− and two bosons φ B 2 3 and φs0 (in addition to the SU(2)L × U(1) and QCD gauge fields).
openaire   +3 more sources

Assessment of Contact Laws Accounting for Softening in 3D Rigid Concrete Particle Models

Buildings
To obtain predictions closer to concrete behaviour, it is necessary to employ a particle model (PM) that considers contact softening. A bilinear softening contact model (BL) has been adopted in PM studies.
Nuno Monteiro Azevedo, Maria Luísa Braga Farinha, Sérgio Oliveira   +2 more
doaj   +1 more source

Hubbard model versus t-J model: The one-particle spectrum [PDF]

, 1996
The origin of the apparent discrepancies between the one-particle spectra of the Hubbard and t-J models is revealed: Wavefunction corrections, in addition to the three-site terms, should supplement the bare t-J.
A. Nazarenko, A.B. Harris, A.R. Kampf, B.O. Wells, C.T. Chen, E. Dagotto, F.C. Zhang, H. Eskes, H. Eskes, Henk Eskes, J. Bała, K.J. von Szczepanski, L.F. Feiner, M.S. Hybertsen, P. Horsch, P.W. Anderson, P.W. Leung, R. Eder, R. Eder, R. Eder, R. Eder, R. Preuss, Robert Eder, S. Uchida, S.A. Trugman, S.A. Trugman, W. Stephan, W. Stephan, X.G. Wen   +28 more
core   +3 more sources

Covariant quantization of infinite spin particle models, and higher order gauge theories

, 2006
Further properties of a recently proposed higher order infinite spin particle model are derived. Infinitely many classically equivalent but different Hamiltonian formulations are shown to exist. This leads to a condition of uniqueness in the quantization
, , A.M. Khan, C. Lanczos, D. Zoller, E.P. Wigner, E.P. Wigner, G.J. Iverson, I. Antoniadis, I.L. Buchbinder, J. Govaerts, J. Mourad, J. Mourad, J. Yngvason, L. Edgren, Ludde Edgren, M.V. Ostrogradski, P.A.M. Dirac, P.D. Mannheim, R.D. Pisarski, Robert Marnelius, S. Hawking, V. Bargmann, X. Bekaert, X. Gracia   +24 more
core   +1 more source

A Novel 3D Reinforced Particle Model for Reinforced Concrete Fracture Assessment: Formulation and Validation

Applied Mechanics
Rigid particle models (PMs) that explicitly consider the influence of the aggregate structure and its physical interaction mechanisms have been used to predict cracking phenomena in concrete.
Nuno Monteiro Azevedo, Maria Luísa Braga Farinha, Sérgio Oliveira   +2 more
doaj   +1 more source

Particle model with generalized Poincaré symmetry

Physics Letters B, 2017
Using the techniques of nonlinear coset realization with a generalized Poincaré group, we construct a relativistic particle model, invariant under the generalized symmetries, providing a dynamical realization of the B5 algebra.
A. Smith
doaj   +1 more source

Volume Dependence of Spectral Weights for Unstable Particles in a Solvable Model

, 2008
Volume dependence of the spectral weight is usually used as a simple criteria to distinguish single-particle states from multi-particle states in lattice QCD calculations. Within a solvable model, the Lee model, we show that this criteria is in principle
C. Michael, Chuan Liu, Guozhan Meng, S. S. Schweber   +3 more
core   +1 more source

Relic Abundance in a Secluded Dark Matter Scenario with a Massive Mediator [PDF]

, 2016
The relic abundance of the dark matter (DM) particle $d$ is studied in a secluded DM scenario, in which the $d$ number decreasing process dominantly occurs not through the pair annihilation of $d$ into the standard model particles, but via the $dd \to mm$
73046, 73047, 73048, Okawa, Shohei, Tanabashi, Masaharu, Yamanaka, Masato   +5 more
core   +2 more sources

Hybrid Modified Particle Swarm Optimization Algorithm for Adjustment of Water Distribution Network Coefficients [PDF]

آب و فاضلاب, 2019
Regarding the complexity of WDNs, the need for computerized modelling of WDNs is felt more than ever for monitoring their performance at the operational stage.
Mehdi Dini
doaj   +1 more source