Zobrazeno 1 - 10
of 128
pro vyhledávání: '"Yang, Cheng Tao"'
Autor:
Rafelski, Johann, Birrell, Jeremiah, Grayson, Christopher, Steinmetz, Andrew, Yang, Cheng Tao
We describe in the context of the particle physics (PP) standard model (SM) `PP-SM' the understanding of the primordial properties and composition of the Universe in the temperature range $130\GeV>T>20\keV$. The Universe evolution is described using
Externí odkaz:
http://arxiv.org/abs/2409.19031
Self-consistent strong plasma screening around light nuclei is implemented in the Big Bang nucleosynthesis (BBN) epoch to determine the short-range screening potential, $e\phi(r)/T \geq 1$, relevant for thermonuclear reactions. We numerically solve t
Externí odkaz:
http://arxiv.org/abs/2406.13055
We characterize in a novel manner the physical properties of the low temperature Fermi gas in the degenerate domain as a function of temperature and chemical potential. For the first time we obtain low temperature $T$ results in the domain where seve
Externí odkaz:
http://arxiv.org/abs/2405.05287
Publikováno v:
International Journal of Modern Physics A Vol. 38, No. 31 (2023) 2350163
We show that Majorana neutrino flavor mixing can be driven by transition dipole moments in the presence of external electromagnetic fields. We demonstrate the sensitivity of the rotation mixing matrix to strong fields obtaining dynamical mass eigenst
Externí odkaz:
http://arxiv.org/abs/2309.15797
We explore the hypothesis that the abundant presence of relativistic antimatter (positrons) in the primordial universe is the source of the intergalactic magnetic fields we observe in the universe today. We evaluate both Landau diamagnetic and magnet
Externí odkaz:
http://arxiv.org/abs/2308.14818
We characterize in detail the very dense $e^- e^+ \gamma$ plasma present during the Big-Bang Nucleosynthesis (BBN) and explore how it is perturbed electromagnetically by \lq\lq impurities, {\it i.e.\/}, spatially dispersed protons and light nuclei un
Externí odkaz:
http://arxiv.org/abs/2307.11264
Publikováno v:
MDPI Universe 2023, 9(7), 309
We offer a survey of the matter-antimatter evolution within the primordial Universe. While the origin of the tiny matter-antimatter asymmetry has remained one of the big questions in modern cosmology, antimatter itself has played a large role for muc
Externí odkaz:
http://arxiv.org/abs/2305.09055
Autor:
Yang, Cheng Tao, Rafelski, Johann
We investigate the strange particle composition of the early Universe in the hadron epoch $T_h\approx 150\ge T\ge 10$\,MeV. We study strangeness yield in thermal and chemical equilibrium constrained by prescribed entropy per baryon in a charge neutra
Externí odkaz:
http://arxiv.org/abs/2108.01752
Autor:
Rafelski, Jan, Yang, Cheng Tao
Publikováno v:
Acta Phys. Pol. B 52, 277 (2021)
Muon abundance is required for the understanding of several fundamental questions regarding properties of the primordial Universe. In this paper we evaluate the production and decay rates of muons in the cosmic plasma as a function of temperature. Th
Externí odkaz:
http://arxiv.org/abs/2103.07812
Autor:
Rafelski, Johann, Yang, Cheng Tao
Publikováno v:
EPJ Web Conf. \textbf{259} (2022), 13001
Strangness production processes can balance natural strangeness decay in the early hadronic Universe. Comparing to the characteristic Hubble time $1/H$, the reaction rates for $\mu^\pm+\nu_{\mu}\rightarrow K^\pm$, $l^-+l^+\rightarrow\phi$, and $\pi+\
Externí odkaz:
http://arxiv.org/abs/2009.05661