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16 papers · 1 filter
Symmetric Invariant Subspaces of Complexifications of Linear Operators
K. V. Storozhuk
We prove the existence of the invariant subspaces of some operators in a real Banach space. For example, linear isometries have invariant subspaces
First Observation of the Decays chi_{cJ} -> pi^0 pi^0 pi^0 pi^0
BESIII Collaboration
We present a study of the P-wave spin -triplet charmonium chi_{cJ} decays (J=0,1,2) into pi^0 pi^0 pi^0 pi^0. The analysis is based on 106 million \psiprime decays recorded with th…
Confirmation of the X(1835) and observation of the resonances X(2120) and X(2370) in J/psi->gamma pi^+pi^-eta'
BESIII Collaboration
With a sample of (225.2\pm2.8)*10^{6} J/psi events registered in the BESIII detector, J/psi->gamma pi^+ pi^- eta' is studied using two eta' decay modes: eta'->pi^+ pi^- eta and eta…
Abstract commensurators of solvable Baumslag - Solitar groups
Oleg Bogopolski
We prove that for any natural n>1, the abstract commensurator group of the Baumslag - Solitar group BS(1,n) is isomorphic to the group of 2 by 2 upper triangular matrices A over ra…
On the contribution of the horizontal sea-bed displacements into the tsunami generation process
Denys Dutykh, Dimitrios Mitsotakis, Leonid Chubarov +1
The main reason for the generation of tsunamis is the deformation of the bottom of the ocean caused by an underwater earthquake. Usually, only the vertical bottom motion is taken i…
-superderivations of simple finite-dimensional Jordan and Lie superalgebras
Ivan Kaygorodov
We introduce the concept of a -superderivation of a superalgebra. -Derivations of Cartan-type Lie superalgebras are treated, as well as -superderivations of simple finite-…
Role of the mean curvature in the geometry of magnetic confinement configurations
A. A. Skovoroda, I. A. Taimanov
Examples are presented of how the geometric notion of the mean curvature is used for general magnetic field configurations and magnetic surfaces. It is shown that the mean magnetic…
Dane developments for the KLOE-2 experimental run
C. Milardi, D. Alesini, M. E. Biagini +38
Recently the peak luminosity achieved on the DAΦNE collider has been improved by almost a factor three by implementing a novel collision scheme based on large Piwinski angle and Cr…
Fluorographene: Two Dimensional Counterpart of Teflon
R. R. Nair, W. C. Ren, R. Jalil +16
We report a stoichiometric derivative of graphene with a fluorine atom attached to each carbon. Raman, optical, structural, micromechanical and transport studies show that the mate…
Orthogonal invariants of skew-symmetric matrices
A. A. Lopatin
The algebra of invariants of d-tuples of n x n skew-symmetric matrices under the action of the orthogonal group by simultaneous conjugation is considered over an infinite field of…
Measurements of h_c(^1P_1) in psi' Decays
The BESIII Collaboration
We present measurements of the charmonium state made with 106M events collected by BESIII at BEPCII. Clear signals are observed for with and withou…
Should recombinations of radical pairs be considered as accompanied by measurements?
Leonid V. Il'ichov, Sergey V. Anishchik
The so-called "phenomenological" kinetic equation for one-pair density operator for spin-selective reactions is defended. We derive this equation from the kinetic equation for dens…
A theory of MHD instability of an inhomogeneous plasma jet
Anatoly S. Leonovich
A problem of the instability of an inhomogeneous axisymmetric plasma jet in a parallel magnetic field is solved. The jet boundary becomes, under certain conditions, unstable relati…
Branching fraction measurements of χ_{c0} and χ_{c2} to π^0π^0 and ηη
The BESIII Collaboration
Using a sample of 1.06 \times 10^8 ψ^{\prime} decays collected by the BESIII detector, χ_{c0} and χ_{c2} decays into π^0π^0 and ηηare studied. The branching fraction results are Br…
Periodic magnetic geodesics on almost every energy level via variational methods
I. A. Taimanov
For strong exact magnetic fields the action functional (i.e., the length plus the linear magnetic term) is not bounded from below on the space of closed contractible curves and the…
Forming the Moon from terrestrial silicate-rich material
R. J. de Meijer, V. F. Anisichkin, W. van Westrenen
Recent high-precision measurements of the isotopic composition of lunar rocks demonstrate that the bulk silicate Earth and the Moon show an unexpectedly high degree of similarity.…