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Wyświetlanie pozycji 11-20 z 35
Modelowanie procesów radiacyjnych wysokich energii w układach podwójnych gwiazd i ich otoczeniu
(2015)
Wyniki obserwacji układów podwójnych gwiazd niektórych typów, przeprowadzone w zakresie promieniowania gamma, wskazują na istotną rolę procesów wysokich energii wewnątrz tych układów lub w ich otoczeniu. Zaobserwowano ...
Modification of thin films induced by slow heavy ions analysed with PIXE and SRIM
(Springer, 2015-03-17)
In the present work the particle induced X-rays (PIXE) emitted during interaction of inert and active slow heavy (HI) ions with specially prepared thin films were measured. Kinematics of the interaction was simulated ...
Hidden Lorentz symmetry of the Hořava–Lifshitz gravity
(North-Holland, 2014)
In this Letter it is shown that the Hořava–Lifshitz gravity theory admits Lorentz symmetry preserving preferred global time foliation of the spacetime.
β decay of 6He into the α+d continuum
(American Physical Society, 2015)
The rare β-decay channel of 6He into the α+d continuum was investigated at the REX-ISOLDE facility. Bunches of postaccelerated 6He ions were implanted into the optical time projection chamber (OTPC), where the decays with ...
Perturbative quantum damping of cosmological expansion
(North-Holland, 2014)
Perturbative quantum gravity in the framework of the Schwinger–Keldysh formalism is applied to compute lowest-order corrections to expansion of the Universe described in terms of the spatially flat Friedman–Lemaître–Robe ...
Quantum gravity stability of isotropy in homogeneous cosmology
(North-Holland, 2011)
It has been shown that anisotropy of homogeneous spacetime described by the general Kasner metric can be damped by quantum fluctuations coming from perturbative quantum gravity in one-loop approximation. Also, a formal ...
Conformal Newton–Hooke symmetry of Pais–Uhlenbeck oscillator
(North-Holland, 2014)
It is demonstrated that the Pais–Uhlenbeck oscillator in arbitrary dimension enjoys the l -conformal Newton–Hooke symmetry provided frequencies of oscillation form the arithmetic sequence ωk=(2k−1)ω1, where k=1,…,n, and ...
On the triviality of higher-derivative theories
(North-Holland, 2012)
The higher-derivative theories with degenerate frequencies exhibit BRST symmetry [V.O. Rivelles, Phys. Lett. B 577 (2003) 147]. In the present Letter meaning of BRST-invariance condition is analyzed. The BRST symmetry is ...