Zobrazeno 1 - 10
of 15 502
pro vyhledávání: '"Meißner, P"'
We work out the spatial density distributions corresponding to the axial-vector charge density operator for spin-1/2 systems using states described by sharply localized wave packets in arbitrary Lorentz-frames. The static approximation, leading to th
Externí odkaz:
http://arxiv.org/abs/2412.05050
The proton-rich nucleus $^{22}$Si is studied using Nuclear Lattice Effective Field Theory with high-fidelity chiral forces. Our results indicate that $^{22}$Si is more tightly bound than $^{20}$Mg, thereby excluding the possibility of two-proton emis
Externí odkaz:
http://arxiv.org/abs/2411.17462
Molecular Dynamics (MD) simulations are a powerful tool for studying matter at the atomic scale. However, to simulate solids, an initial atomic structure is crucial for the successful execution of MD simulations, but can be difficult to prepare due t
Externí odkaz:
http://arxiv.org/abs/2411.17348
Quanto options allow the buyer to exchange the foreign currency payoff into the domestic currency at a fixed exchange rate. We investigate quanto options with multiple underlying assets valued in different foreign currencies each with a different str
Externí odkaz:
http://arxiv.org/abs/2411.16617
We present a systematic \textit{ab initio} study of the low-lying states in beryllium isotopes from $^7\text{Be}$ to $^{12}\text{Be}$ using nuclear lattice effective field theory with the N$^3$LO interaction. Our calculations achieve excellent agreem
Externí odkaz:
http://arxiv.org/abs/2411.14935
Autor:
Meißner, Ulf-G.
In the limit of vanishing up, down and strange quark masses, QCD exhibits a chiral symmetry. This symmetry is broken spontaneously to its vector subgroup, giving rise to Goldstone bosons. These acquire a small mass through the explicit chiral symmetr
Externí odkaz:
http://arxiv.org/abs/2410.21912
We derive a systematic perturbative expansion for the finite-volume energy spectrum of the non-linear $O(N)$ $\sigma$-model in the $\delta$-regime. The violation of the power-counting rules that emerges after the separation of the fast and slow modes
Externí odkaz:
http://arxiv.org/abs/2410.17825
A study of light $\Lambda$ hypernuclei in chiral effective field theory is presented. For the first time chiral $\Lambda$NN and $\Sigma$NN three-body forces are included consistently. The calculations are performed within the no-core shell model. Res
Externí odkaz:
http://arxiv.org/abs/2409.18577
Autor:
Dias, Jorgivan Morais, Ji, Teng, Dong, Xiang-Kun, Guo, Feng-Kun, Hanhart, Christoph, Meißner, Ulf-G., Zhang, Yu, Zhang, Zhen-Hua
We analyze the latest LHCb data on the $\pi^+\pi^-$ spectrum in the isospin-violating $X(3872)~\to~J/\psi \pi^+\pi^-$ decay, employing a model-independent approach based on dispersion theory to deal with the $\pi\pi$ final state interactions. Additio
Externí odkaz:
http://arxiv.org/abs/2409.13245
PrePaMS: Privacy-Preserving Participant Management System for Studies with Rewards and Prerequisites
Taking part in surveys, experiments, and studies is often compensated by rewards to increase the number of participants and encourage attendance. While privacy requirements are usually considered for participation, privacy aspects of the reward proce
Externí odkaz:
http://arxiv.org/abs/2409.10192