Zobrazeno 1 - 10
of 195
pro vyhledávání: '"Meissner, Krzysztof"'
In a previous work [K.A. Meissner and H. Nicolai, Eur. Phys. J. C {\bf 84}, 269 (2024)], two of the present authors have suggested possible experimental ways to search for stable supermassive particles with electric charges of $\cO(1)$ in upcoming un
Externí odkaz:
http://arxiv.org/abs/2407.04883
We examine possible experimental signatures that may be exploited to search for stable supermassive particles with electric charges of $O(1)$ in future underground experiments, and the upcoming JUNO experiment in particular. The telltale signal provi
Externí odkaz:
http://arxiv.org/abs/2306.12797
Some time ago it was suggested that dark matter may consist in part of an extremely dilute gas of supermassive gravitinos with fractional charge 2$e$/3 \cite{MeissnerNicolai2019}. This scheme makes the definite (and falsifiable) prediction that massi
Externí odkaz:
http://arxiv.org/abs/2303.09131
We elaborate on the cosmological implications of the recently established non-perturbative $O(D,D$)-symmetric approach. Following the $\alpha'$-complete Friedmann equations, we provide a qualitative description of the dynamics of anisotropy perturbat
Externí odkaz:
http://arxiv.org/abs/2301.06616
The existence of de-Sitter solutions and their stability within string theory became, in recent years, one of the central research questions within the string theory community. The so-called de-Sitter conjecture states that the de-Sitter vacua are un
Externí odkaz:
http://arxiv.org/abs/2208.06010
We study the quantization of the bosonic sector of supermembrane theory in double dimensional reduction, in order to extract the dependence of the resulting world-sheet action on the string dilaton (which cannot be obtained from a purely kinematic re
Externí odkaz:
http://arxiv.org/abs/2208.05822
Building on the insight that primordial black holes can arise from the formation and subsequent gravitational collapse of bound states of stable supermassive elementary particles during the early radiation era, we offer a comprehensive picture descri
Externí odkaz:
http://arxiv.org/abs/2101.05233
Publikováno v:
Phys. Rev. D 102, 103008 (2020)
We argue that the stable (color singlet) supermassive gravitinos proposed in our previous work can serve as seeds for giant primordial black holes. These seeds are hypothesized to start out as tightly bound states of fractionally charged gravitinos i
Externí odkaz:
http://arxiv.org/abs/2007.11889
Application of the Weinberg's conditions of asymptotic safety to amplitudes and not to couplings of the effective action can help to uniquely define the running in the UV and avoid some of the asymptotic safety program problems. The idea is illustrat
Externí odkaz:
http://arxiv.org/abs/2005.03559
We argue that the superheavy gravitinos that we had previously proposed as candidates for Dark Matter can offer a possible explanation for the ultra-high energy cosmic ray (UHECR) events observed at the Pierre Auger Observatory, via gravitino anti-gr
Externí odkaz:
http://arxiv.org/abs/1906.07262