Zobrazeno 1 - 10
of 156
pro vyhledávání: '"Bastian Kubis"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 7, Pp 1-56 (2024)
Abstract We study the effects of anomalous thresholds on the non-local form factors describing the hadronization of the light-quark contribution to B → (P, V)γ * transitions. Starting from a comprehensive discussion of anomalous thresholds in the
Externí odkaz:
https://doaj.org/article/a50842b23e0b4e14a586598be6765f9b
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 3, Pp 1-34 (2024)
Abstract Based on recent progress in the systematic analysis of C and CP violation in the light-meson sector, we calculate the C-odd transition amplitudes η → π 0 ℓ + ℓ − and η ′ → ηℓ + ℓ − . Focusing on long-distance contributi
Externí odkaz:
https://doaj.org/article/cabb2d675c0f4ba2b82cf6e3b91f230e
Publikováno v:
Physics Letters B, Vol 853, Iss , Pp 138698- (2024)
A reliable determination of the pole parameters and residues of nucleon resonances is notoriously challenging, given the required analytic continuation into the complex plane. We provide a comprehensive analysis of such resonance parameters accessibl
Externí odkaz:
https://doaj.org/article/7d5b0af53299465f9d31ed6f380f44b5
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 8, Pp 1-30 (2023)
Abstract We study the transition form factors (TFFs) of axial-vector mesons in the context of currently available experimental data, including new constraints from e + e − → f 1(1285)π + π − that imply stringent limits on the high-energy beha
Externí odkaz:
https://doaj.org/article/151b3bd857e04ec3b351e92777f3139e
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 8, Pp 1-31 (2023)
Abstract Isospin-breaking (IB) effects are required for an evaluation of hadronic vacuum polarization at subpercent precision. While the dominant contributions arise from the e + e − → π + π − channel, also IB in the subleading channels can b
Externí odkaz:
https://doaj.org/article/e7cc8013afa94fcb9fe9a0ffb3ea7d03
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 6, Pp 1-76 (2023)
Abstract The quest for new sources of the simultaneous violation of C and CP symmetry was popular in the 1960s and has since been mostly neglected for more than half a century. In this work we revisit fundamental quark-level operators that break C an
Externí odkaz:
https://doaj.org/article/8183592ccc774b90a7cbb7a703519506
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 6, Pp 1-22 (2023)
Abstract Decays into three particles are often described in terms of two-body resonances and a non-interacting spectator particle. To go beyond this simplest isobar model, crossed-channel rescattering effects need to be accounted for. We quantify the
Externí odkaz:
https://doaj.org/article/f6fbca902bd34e07805249304edc73a8
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 7, Pp 1-3 (2023)
Externí odkaz:
https://doaj.org/article/c910d3459a9f40ce8f34e1616942bbac
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 12, Pp 1-6 (2022)
A correction to this paper has been published: https://doi.org/10.1007/JHEP02(2022)137
Externí odkaz:
https://doaj.org/article/f396d36f02f741339cd54593a240b1d9
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 12, Pp 1-23 (2022)
Abstract It has been pointed out recently that a certain set of dimension-6 scalar P- and CP-violating light-quark-muon operators may be tested in η and η′ decays to various final states involving μ + μ − pairs, at a level not yet excluded by
Externí odkaz:
https://doaj.org/article/28e0a0ba370643c8a259cb5b922fde6a