Results 31 to 40 of about 559,341 (295)

Symmetries and mass degeneracies in the scalar sector

Journal of High Energy Physics, 2019
We explore some aspects of models with two and three SU(2) scalar doublets that lead to mass degeneracies among some of the physical scalars. In Higgs sectors with two scalar doublets, the exact degeneracy of scalar masses, without an artificial fine ...
Howard E. Haber, O. M. Ogreid, P. Osland, M. N. Rebelo   +3 more
doaj   +1 more source

On the way from matter-dominated era to dark energy universe [PDF]

, 2006
We develop the general program of the unification of matter-dominated era with acceleration epoch for scalar-tensor theory or dark fluid. The general reconstruction of single scalar-tensor theory is fulfilled.
Hrvoje Štefančić, L. Perivolaropoulos, Sergei D. Odintsov, Shin’ichi Nojiri, V. Faraoni, W. Fang, Y. Fujii   +6 more
core   +2 more sources

Effective potential in scalar field theory [PDF]

Physical Review D, 1987
We study the \ensuremath{\lambda}${\ensuremath{\varphi}}^{4}$ theory in 4 space-time dimensions in a Monte Carlo simulation on a ${10}^{4}$ lattice, through an especially simple and accurate way to calculate the effective potential. All renormalized parameters are obtained via the effective potential and the propagator.
, Huang, , Manousakis, , Polonyi
openaire   +2 more sources

Analytic study of superradiant stability of Kerr–Newman black holes under charged massive scalar perturbation

European Physical Journal C: Particles and Fields, 2021
The superradiant stability of a Kerr–Newman black hole and charged massive scalar perturbation is investigated. We treat the black hole as a background geometry and study the equation of motion of the scalar perturbation.
Jun-Huai Xu, Zi-Han Zheng, Ming-Jian Luo, Jia-Hui Huang   +3 more
doaj   +1 more source

A modified version of the Koide formula from flavor nonets in a scalar potential model and in a Yukawaon model

Nuclear Physics B, 2021
We present a modified version of the Koide formula from a scalar potential model or from a Yukawaon model, based on scalar fields set up in a nonet representation of the SU(3) flavor symmetry in the Standard Model.
Zhengchen Liang, Zheng Sun
doaj   +1 more source

Dynamics of Scalar field in a Brane World

, 2002
We study the dynamics of a scalar field in the brane cosmology. We assume that a scalar field is confined in our 4-dimensional world. As for the potential of the scalar field, we discuss three typical models: (1) a power-law potential, (2) an inverse ...
A. Mazumdar, A. R. Liddle, A. S. Majumdar, A. Vilenkin, B. Ratra, B. Spokoiny, B. Whitt, C. Csaki, D. Langlois, D. Wands, E. J. Copeland, E. J. Copeland, F. Lucchin, G. Huey, I. Antoniadis, I. Zlatev, J. D. Barrow, J. Khoury, J. M. Cline, J. Preskill, K. Maeda, K. Maeda, Kei-ichi Maeda, Kohta Yamamoto, L. H. Ford, L. Mendes, L. P. Grishchuk, L. Randall, L. Randall, N. Arkani-Hamed, N. Goheer, N. Kaloper, P. Binétruy, P. Binétruy, P. Hořava, P. Hořava, P. J. Steinhardt, P. Kanti, R. M. Hawkins, R. Maatens, R. R. Caldwell, S. C. Davis, S. Mizuno, S. Mukohyama, S. Tsujikawa, Shuntaro Mizuno, T. Nihei, T. Shiromizu, T. W. B. Kibble, V. A. Rubakov, V. Sahni, Y. Shtanov   +51 more
core   +1 more source

Active and passive fields face to face

, 2004
The statistical properties of active and passive scalar fields transported by the same turbulent flow are investigated. Four examples of active scalar have been considered: temperature in thermal convection, magnetic potential in two-dimensional ...
Bernard D, Biskamp D, Boffetta G, Celani A, Celani A Cencini M Noullez A, Chertkov M, Chertkov M, Ching E S C, Constantin P, Crisanti A, Ellis R S, Falkovich G, Frisch U, Gat O, Gawe?dzki K, Held I M, Kraichnan R H, Monin A, Pasquill F, Pouquet A, Pumir A, Risken H, Salmon R, Shraiman B I, Shraiman B I, Williams F A, Yakhot V, Zel'dovich Ya B   +27 more
core   +3 more sources

Series solutions for a static scalar potential in a Salam-Sezgin Supergravitational hybrid braneworld [PDF]

, 2005
The static potential for a massless scalar field shares the essential features of the scalar gravitational mode in a tensorial perturbation analysis about the background solution.
A. Chamblin, A. Salam, Alex B. Nielsen, Benedict M. N. Carter, C. Barcelo, F. Leblond, G.W. Gibbons, J. Louko, L. Randall, L. Randall, Y. Aghababaie   +10 more
core   +1 more source

Scalar field cosmologies with inverted potentials [PDF]

Journal of Cosmology and Astroparticle Physics, 2015
Regular bouncing solutions in the framework of a scalar-tensor gravity model were found in a recent work. We reconsider the problem in the Einstein frame (EF) in the present work. Singularities arising at the limit of physical viability of the model in the Jordan frame (JF) are either of the Big Bang or of the Big Crunch type in the EF.
Boisseau, Bruno, Giacomini, Hector, Polarski, David   +2 more
openaire   +2 more sources

Neutron stars in scalar–tensor gravity with quartic order scalar potential

Annals of Physics, 2022
In this work we investigate the effects of a non-minimally coupled quartic order scalar model on static neutron stars, with the non-minimal coupling in the Jordan frame being of the form $f(ϕ) = 1 + ξϕ^2$. Particularly we derive the Einstein frame Tolman-Oppenheimer-Volkoff equations, and by numerically integrating them for both the interior and the ...
S.D. Odintsov, V.K. Oikonomou
openaire   +4 more sources