Zobrazeno 1 - 10
of 6 079
pro vyhledávání: '"Eichmann, A"'
Autor:
Walter, Dominik, Eichmann, Björn
Turbulent magnetic fields are to some extent a universal feature in astrophysical phenomena. Charged particles that encounter these turbulence get on average accelerated according to the so-called second-order Fermi process. However, in most astrophy
Externí odkaz:
http://arxiv.org/abs/2411.14804
We present results for single axial-vector and scalar meson pole contributions to the hadronic light-by-light scattering (HLbL) part of the muon's anomalous magnetic moment. In the dispersive approach to these quantities (in narrow width approximatio
Externí odkaz:
http://arxiv.org/abs/2411.05652
Two-dimensional particle-in-cell (PIC) simulations explore the collisionless tearing instability developing in a Harris equilibrium configuration in a pair (electron-positron) plasma, with no guide field, for a range of parameters from non-relativist
Externí odkaz:
http://arxiv.org/abs/2410.05619
We present quantitative results for masses and the internal structure of four-quark states with two heavy quarks, i.e. $QQ'\bar{q}\bar{q}'$ with $Q,Q'\in \{c,b\}$ and $q,q' \in \{u,d,s\}$, and $J^{P} \in {1^+}$. The composition of these states in ter
Externí odkaz:
http://arxiv.org/abs/2409.05779
Autor:
Padovani, P., Resconi, E., Ajello, M., Bellenghi, C., Bianchi, S., Blasi, P., Huang, K. -Y., Gabici, S., Rosas, V. Gámez, Niederhausen, H., Peretti, E., Eichmann, B., Guetta, D., Lamastra, A., Shimizu, T.
We present a comprehensive multi-messenger study of NGC 1068, the prototype Seyfert II galaxy recently associated with high-energy IceCube neutrinos. Various aspects of the source, including its nuclear activity, jet, outflow, and starburst region, a
Externí odkaz:
http://arxiv.org/abs/2405.20146
Autor:
Eichmann, Sascha
We are looking for an optimal convex domain on which the boundary value problem $$\left\{\begin{array}{cc}(-\Delta)^2 u_\gamma-\gamma\Delta u_\gamma = f,& \mbox{ in }\Omega\\ u_\gamma=\partial_\nu u_\gamma=0,& \mbox{ on }\partial\Omega\end{array}\rig
Externí odkaz:
http://arxiv.org/abs/2402.16575
Publikováno v:
Phys. Rev. D 109, 074025 (2024)
We discuss the spectrum and the internal composition of ground and excited four-quark states in the charm and bottom energy region. To this end we extend previous calculations within the framework of the relativistic four-body Faddeev-Yakubovsky equa
Externí odkaz:
http://arxiv.org/abs/2402.12830
Autor:
Eichmann, Sascha
To avoid possible singularities in the Willmore flow, one usually works under an energy threshold provided by the Li-Yau inequality. Here we improve this threshold by also considering parts outside of a possible singularity together with Dirichlet bo
Externí odkaz:
http://arxiv.org/abs/2402.05580
Autor:
Steffen, Lea, Schulze, Martin, Eichmann, Christian, Koch, Robin, Hermann, Andreas, Mussulin, Rosa Frietsch, Graaf, Friedrich, Wilbrandt, Robert, Besselmann, Marvin Große, Roennau, Arne, Dillmann, Rüdiger
Care robotics as a research field has developed a lot in recent years, driven by the rapidly increasing need for it. However, these technologies are mostly limited to a very concrete and usually relatively simple use case. The bimanual robot House of
Externí odkaz:
http://arxiv.org/abs/2312.06292
Publikováno v:
A&A 687, A139 (2024)
NGC 1068 is a nearby widely studied Seyfert II galaxy presenting radio, infrared, X- and $\gamma$-ray emission as well as strong evidence for high-energy neutrino emission. Recently, the evidence for neutrino emission could be explained in a multimes
Externí odkaz:
http://arxiv.org/abs/2310.20629