Zobrazeno 1 - 10
of 50 416
pro vyhledávání: '"Meissner, A"'
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
Publikováno v:
Phys. Lett. B 859 (2024) 139086
In this work, we present a calculation of the triton $\beta$-decay lifetime using Nuclear Lattice Effective Field Theory (NLEFT) at next-to-next-to-next-to-leading order in the chiral expansion. By incorporating a non-perturbative treatment of the hi
Externí odkaz:
http://arxiv.org/abs/2408.06670
We investigate the feasibility of measuring the proton charge radius through dimuon photoproduction off a proton target. Our findings indicate that the Bethe-Heitler mechanism, which dominates at small momentum transfers, allows for an extraction of
Externí odkaz:
http://arxiv.org/abs/2407.20375
Many excited states in the hadron spectrum have large branching ratios to the three-hadron final states. Understanding such particles from first principles QCD requires input from lattice QCD with one-, two-, and three-meson interpolators as well as
Externí odkaz:
http://arxiv.org/abs/2407.16659
Autor:
Saulnier, Tiphaine, Meissner, Wassilios G., Fabbri, Margherita, Foubert-Samier, Alexandra, Proust-Lima, Cécile
In clinical studies, measurement scales are often collected to report disease-related manifestations from clinician or patient perspectives. Their analysis can help identify relevant manifestations throughout the disease course, enhancing knowledge o
Externí odkaz:
http://arxiv.org/abs/2407.08278
In previous work two of the present authors have suggested possible experimental ways to search for stable supermassive particles with electric charges of $\mathcal{O}(1)$ in upcoming underground experiments and the new JUNO observatory in particular
Externí odkaz:
http://arxiv.org/abs/2407.04883