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M. Y. Khlopov

Publications and source records attributed to M. Y. Khlopov.

13 recordsLinked to original sources
arXiv2026

Strong primordial inhomogeneities of axion-like field in Einstein-Gauss-Bonnet gravity

In this paper we consider complex scalar field with Mexican hat potential coupled with Gauss-Bonnet scalar resulting in restored U(1) symmetry at the stage of inflation, corresponding to the modern cosmological horizon. In our model, the phase transition takes place during inflation, avoiding large-scale axion isocurvature perturbations. Our model provides strong primordial inhomogeneities on small scales and ultra-light axion-like particle as either a fuzzy dark matter candidate or a candidate for inhomogeneous dark energy. We also study the possibility of black hole formation and gravitational wave background in this scenario. We find that in the case when the symmetry breaking field does not backreact on inflation, black hole production is not feasible. However, under specific conditions, gravitational waves fitting the NANOGrav band can be obtained.

hep-th↗
arXiv2026

PeV neutrons as origin of separated SS433 TeV signals

The SS433, a well-known binary system with an internal black hole, have shown since half a century, an inner (a few year light distances) twin precessing jets spirals. These beams are made by tidal forces while stripping mass from large stellar companion feeding an inner BH accretion disk and an orthogonal accelerating twin jet. From it, the radio, X gamma jet emission. A couple of years ago H.E.S.S telescope as well as HAWC and LHAASO array detectors, discovered also the surprising signature of an unexpected far twin separated gamma beam at tens TeV energy. At a hundred light years distances from its central source. We suggest that it is the legacy of a past rare eruption, a century ago, of tens PeV (10^16 eV) relativistic twin neutron beams. Their beta decay in flight at far distances, into proton, neutrino and in particular into tens TeV electrons, could feed the observed TeV gamma traces. They are originated by the same secondary tens TeV electrons emitting hard gamma, by Inverse Compton Scattering onto interstellar infrared photons.

astro-ph.HE↗
arXiv2022

How can we explain last UHERC anisotropies?

We consider the recent results on UHECR (Ultra High Energy Cosmic Ray), clustering, composition, distribution in the sky, from the energy of several EeV with the dipole anisotropy up to the highest ones. We have suggested since 2008 and we reconfirm here that UHECR at 40 up to 70 EeV are mostly made by light and lightest nuclei. The remarkable Virgo absence and the few localized nearby extragalactic sources as CenA, NG 253, M82 may be well understood by the lightest nuclei fragility and opacity within Mpc distances. We comment also on the role of a few galactic UHECR sources at ten EeV that may be partially feeding the Auger dipole UHECR anisotropy. The recent anisotropy in the UHECR spectral composition of lightest and heavy nuclei, outside and along the galactic plane, could also be a first confirmation of our previous claims (2012). The interplay of the heavier and most energetic UHECR galactic nuclei with the mainly local (Mpcs) extragalactic signals ruled by lightest nuclei, seems to fit the main pieces of UHECR puzzle.

astro-ph.HE↗
arXiv2021

Preface to the 23rd International Workshop "What Comes Beyond the Standard Models", July 04 -- July 12, 2020, Bled, Slovenia, [Virtual Workshop -- July 6-10 2020], Invited Talks, Talks And Scientific Debuts debuts

The contribution contains the preface to the Proceedings to the 23rd International Workshop "What Comes Beyond the Standard Models", July 04 -- July 12, 2020, Bled, Slovenia, [Virtual Workshop -- July 6.--10. 2020], Volume 1: Invited Talks and Volume 2: Further Talks And Scientific Debuts, published in Bled workshops in physics, Vol.21, No. 1 and 2, DMFA-Založnistvo, Ljubljana, Dec. 2020, links to (most of) the published contributions, section (by M.Yu. Khlopov) on VIA and virtual conference at Bled 2020, and two poems by Astri Kleppe.

physics.gen-ph↗
arXiv2020

Preface to the 22nd workshop "What comes beyond the standard models", Bled July 06--July 14, 2019, and links to the talks appearing in the proceedings, and/or in arXiv

The contribution contains the preface to the Proceedings to the 22nd Workshop "What Comes Beyond the Standard Models", Bled, July 06 - July 14, 2019, published in Bled workshops in physics, Vol.20, No. 2, DMFA-Založnistvo, Ljubljana, Dec. 2019, links to (most of) the published contributions and section (by M.Yu. Khlopov) on VIA at Bled 2019.

physics.gen-ph↗
arXiv2019

Proceedings to the 21st workshop "What comes beyond the standard models", Bled June 23--July 1, 2018, with links to the talks appearing in the proceedings, and/or in arXiv

The contribution contains the preface to the Proceedings to the 21st Workshop "What Comes Beyond the Standard Models", Bled, June 23 - July 1, 2018, published in Bled workshops in physics, Vol.19, No. 2, DMFA-Založnistvo, Ljubljana, Dec. 2018, links to (most of) the published contributions and section (by M.Yu. Khlopov) on VIA at Bled 2018.

physics.gen-ph↗
arXiv2018

Preface to the 20th workshop "What comes beyond the standard models", Bled July 09--17, 2017, and links to the talks appearing in the proceedings, and/or in arXiv

The contribution contains the preface to the Proceedings to the 20th Workshop "What Comes Beyond the Standard Models", Bled, July 09 - 17, 2017, published in Bled workshops in physics, Vol.18, No. 2, DMFA-Založnistvo, Ljubljana, Dec. 2017, links to (most of) the published contributions and section (by M.Yu. Khlopov) on VIA at Bled 2017.

hep-ph↗