A. Introduction. — At present, the attempt to synthetize superheavy elements is one of important tasks of modern physics. The study of the structure of such isotopes is then a question of a near future. Very recently, in the isotope of 254 No (Z=102), the ground-state band of even–even nucleus up to spin 14 was identified [1]. Moreover a production of more heavier element – Z=118, A=293 – was i...

We consider a setup where R-parity is violated in the framework of split supersymmetry. The out-of-equilibrium decays of heavy squarks successfully lead to the generation of a baryon asymmetry. We restrict the R-parity violating couplings to the baryon number violating subset to keep the neutralino sufficiently stable to provide the dark matter. The observed baryon asymmetry can be generated fo...

We show that, contrary to the standard lore, dark matter may be superheavy (many orders of magnitude larger than the weak scale). We show that massive particles may be produced naturally during the transition from the inflationary phase to either a matter-dominated or radiation-dominated phase as a result of the expansion of the background spacetime acting on vacuum quantum fluctuations of the ...

Abstract Superheavy element research has been a strong pillar of the program at GSI Darmstadt since its foundation. Six new elements were discovered along with many isotopes. Initial results on chemical properties heaviest obtained that allowed for comparing their behavior lighter homologs and theoretical predictions. Main achievements past five decades superheavy are described an outlook into ...

Chemical investigations of transactinides are a very exciting field of research. Through these experiments the dramatic influence of relativity on chemical properties of these extremely heavy elements can be studied, and the newly produced atoms are assigned their place in the periodic table. However, there are a number of challenges connected with this research. All the superheavy elements are...

We re-examine collisional annihilation of superheavy dark matter particles in dark matter density spikes in the galactic halo as a possible source of ultrahigh energy cosmic rays. We estimate the possible flux in a way that does not depend on detailed assumptions about the density profiles of dark matter clumps. The result confirms that collisional annihilation is compatible with annihilation c...

Abstract As LIGO-Virgo-KAGRA enters its fourth observing run, a new opportunity to search for electromagnetic counterparts of compact object mergers will also begin. The light curves and spectra from the first “kilonova” associated with binary neutron star merger (NSM) suggests that these sites are hosts rapid capture (“ r ”) process. However, it is unknown just how robust elemental production ...

Fission tracks with a range 19% longer than tracks produced by uranium fission fragments were observed on mylar foils after a three year underground (100 m w. e.) exposure to 3600 cm2 of radlogemc lead. Ordinary lead which was simultaneously exposed to mylar foils under the same conditions yielded a background effect of only 3% of the effect from radiogenic lead. The observed long-range tracks ...

We re-examine collisional annihilation of superheavy dark matter particles in dark matter density spikes in the galactic halo as a possible source of ultrahigh energy cosmic rays. We estimate the possible flux in a way that does not depend on detailed assumptions about the density profiles of dark matter clumps. The result confirms that collisional annihilation is compatible with annihilation c...