Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Thomas Vonk"'
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 2, Pp 1-30 (2022)
Abstract We investigate the phase shifts of low-energy α-α scattering under variations of the fundamental parameters of the Standard Model, namely the light quark mass, the electromagnetic fine-structure constant as well as the QCD θ-angle. As a f
Externí odkaz:
https://doaj.org/article/072e6e01cda14ec681151dd1ae37d857
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 8, Pp 1-40 (2021)
Abstract In the past, the axion-nucleon coupling has been calculated in the framework of SU(2) heavy baryon chiral perturbation theory up to third order in the chiral power counting. Here, we extend these earlier studies to the case of heavy baryon c
Externí odkaz:
https://doaj.org/article/30cd22f8742a4241ab431a005d1b243b
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 5, Pp 1-23 (2020)
Abstract At low energies, the strong interaction is governed by the Goldstone bosons associated with the spontaneous chiral symmetry breaking, which can be systematically described by chiral perturbation theory. In this paper, we apply this theory to
Externí odkaz:
https://doaj.org/article/760a676acd2b4e1ca0c60ad123d6159b
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 3, Pp 1-19 (2020)
Abstract We derive the axion-nucleon interaction Lagrangian in heavy baryon chiral perturbation theory up to next-to-next-to-leading order. The effective axion-nucleon coupling is calculated to a few percent accuracy.
Externí odkaz:
https://doaj.org/article/8cfb65cc3ead45e59d2583c02b8d48d2
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 6, Pp 1-34 (2019)
Abstract This paper addresses two aspects concerning the θ-vacuum of Quantum Chro-modynamics. First, large-N c chiral perturbation theory is used to calculate the first two non-trivial cumulants of the distribution of the winding number, i.e. the to
Externí odkaz:
https://doaj.org/article/7a1c3dfcb0ff4afba0848d45d3afe4e1
Publikováno v:
Physical Review Research, Vol 2, Iss 3, p 033392 (2020)
We investigate the impact of the QCD vacuum at nonzero θ on the properties of light nuclei, Big Bang nucleosynthesis, and stellar nucleosynthesis. Our analysis starts with a calculation of the θ-dependence of the neutron-proton mass difference and
Externí odkaz:
https://doaj.org/article/0b9c6e3b69be4688bf2b6ab642698f71
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 10, Pp 1-2 (2019)
In the original paper [1]
Externí odkaz:
https://doaj.org/article/24bf49d902d8412ba2628c6e0141bec9
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 8, Pp 1-40 (2021)
Journal of high energy physics 2021(8), 24 (2021). doi:10.1007/JHEP08(2021)024
Journal of High Energy Physics
Journal of high energy physics 2021(8), 24 (2021). doi:10.1007/JHEP08(2021)024
Journal of High Energy Physics
In the past, the axion-nucleon coupling has been calculated in the framework of SU(2) heavy baryon chiral perturbation theory up to third order in the chiral power counting. Here, we extend these earlier studies to the case of heavy baryon chiral per
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 5, Pp 1-23 (2020)
Journal of high energy physics 2020(5), 1 (2020). doi:10.1007/JHEP05(2020)001
Journal of High Energy Physics
Journal of high energy physics 2020(5), 1 (2020). doi:10.1007/JHEP05(2020)001
Journal of High Energy Physics
At low energies, the strong interaction is governed by the Goldstone bosons associated with the spontaneous chiral symmetry breaking, which can be systematically described by chiral perturbation theory. In this paper, we apply this theory to study th
Publikováno v:
Physical review / D 105(5), 054029 (2022). doi:10.1103/PhysRevD.105.054029
Physical Review
Physical Review
The process of pion axioproduction, $aN\to\pi N$, with an intermediate $\Delta$ resonance is analyzed using baryon chiral parturbation theory. The $\Delta$ resonance is included in two ways: First, deriving the $a\Delta N$-vertices, the axion is brou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cdc5a5ae0801e6381e792db49a6cd05f
https://juser.fz-juelich.de/record/911085
https://juser.fz-juelich.de/record/911085