Prof.
Vyacheslav Dokuchaev
(Institute for Nuclear Research of the Russian Academy of Sciences)
11/10/2016, 13:15
Nuclear physics and particle physics
Plenary/section talk
We find the exact analytical expressions for metric functions of the classical Vaidya metric in the diagonal coordinates in the case of the linear mass function. By using these coordinates, we elaborate the maximum analytic extension of the Vaidya metric with a linear growth of the black hole mass and construct the corresponding Carter-Penrose diagrams for different specific cases. The derived...
Prof.
Alexander Zakharov
(leading researcher)
11/10/2016, 13:30
Nuclear physics and particle physics
Plenary/section talk
In the
papers reporting about this discovery, the joint LIGO \&
VIRGO team presented an upper limit on graviton mass such as $m_g <
1.2 \times 10^{-22} eV$ \cite{Abbott_16,ligo16}. The authors
concluded that their observational data do not show violations of
classical general relativity because the graviton mass limit is very
small.
We show that an analysis of bright star trajectories...
Sergey Sushkov
(Kazan Federal University)
11/10/2016, 13:45
Nuclear physics and particle physics
Plenary/section talk
We present a systematic analysis of homogeneous and isotropic cosmologies in a particular Horndeski model with Galileon shift symmetry, containing also a $\Lambda$-term and a matter. The model, sometimes called Fab Five, admits a rich spectrum of solutions. Some of them describe the standard late time cosmological dynamic dominated by the $\Lambda$-term and matter, while at the early times...
Alexander Smirnov
(IZMIRAN)
11/10/2016, 14:00
Nuclear physics and particle physics
Plenary/section talk
We study hypermagnetic helicity and lepton asymmetry evolution in plasma of the early Universe before the electroweak phase transition (EWPT) accounting for chirality flip processes via inverse Higgs decays and sphaleron transitions which violate the left lepton number and wash out the baryon asymmetry of the Universe (BAU). In the scenario where the right electron asymmetry supports the BAU...
Prof.
Kirill Bronnikov
(VNIIMS)
11/10/2016, 14:15
Nuclear physics and particle physics
Plenary/section talk
In 6D general relativity with a scalar field as a source of gravity, a new type of static wormhole solutions is presented: such wormholes connect our universe with a small 2D extra subspace with a universe where this extra subspace is large. We consider manifolds
with the structure M0 x M1 x M2, where M0 is 2D Lorentzian space-time while each of M1 and M2 can be a 2-sphere or a 2-torus. After...
Dr.
Sergei Bolokhov
(Peoples' Friendship University of Russia)
11/10/2016, 14:30
Nuclear physics and particle physics
Plenary/section talk
We study the properties of an effective potential for the scale factor of extra dimensions
in a Kaluza-Klein-type model with a spherical extra factor space, including a function of the scalar curvature and other quadratic curvature invariants, taking into account the Casimir energy of massless scalar fields. We demonstrate the existence of a minimum of the potential, able to induce a...
Prof.
Sergey Rubin
(MEPhI)
11/10/2016, 14:45
Nuclear physics and particle physics
Plenary/section talk
Reduction mechanism of a scalar field insertion into a Lagrangian of nonlinear gravity is proposed. Equivalence between nonlinear gravity with two extra space and nonlinear gravity with an extra space plus a scalar field is studied. The scalar field mass depends on properties of a smaller extra space.
