419 research outputs found
Yuri M. Romanovsky – destiny, science, rendezvous
No full textThe article is a recollection of Yuri Mikhailovich Romanovsky, a world-famous biophysicist, Honorary Professor of Lomonosov Moscow State Uаniversity, the stages of his life, scientific and personal destiny, of his sons – Mikhail and Alexander. The development of Yu. M. Romanovsky as a scientist and personality, the influence on him of his family, classmates, senior associates and friends, who represented the best people of Soviet and Russian science over the past 60 years, are described, as well as his personal contribution to world science – especially to mathematical biophysics. Much attention is paid to his scientific and social activities – from the chairman of the housing cooperative of scientists and teachers of Lomonosov Moscow State University to the collector of biographies of graduates of the Physics Department of Lomonosov Moscow State University, who made a huge contribution to the development of the scientific and industrial potential of our country. His enormous role in the development of cooperation between Lomonosov Moscow State University and Saratov State University in the field of biophysics and nonlinear dynamics is also presented
Author Correction: Nitze, I; Grosse, G; Jones, B.M.; Romanovsky, V.E.; Boike, J.: Remote sensing quantifies widespread abundance of permafrost region disturbances across the Arctic and Subarctic. - Nature Communications. - 9 (2018), 5423
No full textThe original version of this Article contained an error in the author affiliations. Affiliation 5 incorrectly read ‘Tyumen State Oil and Gas University, Tyumen, Tyument. Oblast, Russian Federation, 625000’.This has now been corrected in both the PDF and HTML versions of the Article
Gauss broadening of X-ray laser lines by electric potential fluctuations inside atomic nuclei
No full textThe broadening of X-ray laser lines by fluctuations of electric potential inside corresponding nuclei is studied. The fluctuations are produced by neutron-proton and proton-neutron transformations when localization of electric charge inside heavy nuclei changes. Atomic (and ionic) bound electrons "feel" such fluctuation as non-central Coulomb potential.
It is shown that the potential fluctuations have the Gauss distribution while nuclei are considered as drops both of normal and Fermi-liquids. Finally, an electron level asquires the Gauss broadening. Estimations show that the linewidth can be of the same order as the Doppler width for highly-ionized plasmas ions
Transverse electron acceleration in the field of terahertz radiation. Terahertz synchrotron
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«Our military organization ... continues to consider you as leader»: the letter and report to General M. V. Alekseev about the white underground in Kazan and Tsaritsyn. 1918
No full textThe readers are invited to publish a letter and a report to the leader of the
White movement in the South of Russia, General M.V. Alekseev about the white
underground in Kazan and Tsaritsyn in 1918. The author of the letter, General
Yu.D. Romanovsky, led an underground anti-Bolshevik organization in Kazan. The
documents deal with a wide range of significant issues: the activities of the antiBolshevik underground in the Volga, relations between different factions within the
anti-Bolshevik camp, and white relations with French representative
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
No full textFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
Measurement of the ratio of branching fractions B(B0→K∗0γ )/B(B0s→φγ ) and the directCP asymmetry inB 0→K∗0γ
No full textThe ratio of branching fractions of the radiative B decays B0→K⁎0γ and B0s→ϕγ has been measured using an integrated luminosity of 1.0 fb−1 of pp collision data collected by the LHCb experiment at a centre-of-mass energy of s√=7TeV. The value obtained is
B(B0→K⁎0γ)B(B0s→ϕγ)=1.23±0.06(stat.)±0.04(syst.)±0.10(fs/fd),
where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions fs/fd. Using the world average value for B(B0→K⁎0γ), the branching fraction B(B0s→ϕγ) is measured to be (3.5±0.4)×10−5.
The direct CP asymmetry in B0→K⁎0γ decays has also been measured with the same data and found to be
ACP(B0→K⁎0γ)=(0.8±1.7(stat.)±0.9(syst.))%.
Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations
Measurement of the polarization amplitudes and triple product asymmetries in the B0s → Φ Φ decay
No full text<p>Using 1.0 fb−1 of pp collision data collected at a centre-of-mass energy of s√=7 TeV with the LHCb detector, measurements of the polarization amplitudes, strong phase difference and triple product asymmetries in the B0s→ϕϕ decay mode are presented. The measured values are</p>
<p>|A0|2=0.365±0.022(stat)±0.012(syst),|A⊥|2=0.291±0.024(stat)±0.010(syst),cos(δ∥)=−0.844±0.068(stat)±0.029(syst),AU=−0.055±0.036(stat)±0.018(syst),AV=0.010±0.036(stat)±0.018(syst).</p>
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