Zobrazeno 1 - 10
of 254
pro vyhledávání: '"Christoph Hanhart"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 5, Pp 1-12 (2024)
Abstract We study the inclusive and exclusive cross sections of $$e^+e^-\rightarrow \text {hadrons}$$ e + e - → hadrons for center-of-mass energies between 3.70 and $$3.83\,\,\textrm{GeV} $$ 3.83 GeV to infer the mass, width, and couplings of the $
Externí odkaz:
https://doaj.org/article/76dae3f9a4f44e6980c523f0258cd368
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 9, Pp 1-14 (2023)
Abstract It was demonstrated in a series of papers employing unitarized chiral perturbation theory that the phenomenology of the scalar open-charm state, the $$D_0^*(2300)$$ D 0 ∗ ( 2300 ) , can be understood as the interplay of two poles, correspo
Externí odkaz:
https://doaj.org/article/7500f337aafb435fbb5cc719cda7203b
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 12, Pp 1-3 (2022)
Abstract In this addendum to Ref. [1] we show that the mismatch between the $$\rho $$ ρ – $$\omega $$ ω mixing parameter $$\epsilon _{\rho \omega }$$ ϵ ρ ω as extracted from $$\eta '\rightarrow \pi ^+\pi ^-\gamma $$ η ′ → π + π - γ and
Externí odkaz:
https://doaj.org/article/1199125475c344f08380c87862e44d3f
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 5, Pp 1-17 (2022)
Abstract We present a dispersive representation of the $$\eta '$$ η ′ transition form factor that allows one to account, in a consistent way, for the effects of $$\rho $$ ρ – $$\omega $$ ω mixing in both the isoscalar and the isovector contrib
Externí odkaz:
https://doaj.org/article/9034080c5bcb4d939488e5f374ea1734
Autor:
Vadim Baru, Xiang-Kun Dong, Meng-Lin Du, Arseniy Filin, Feng-Kun Guo, Christoph Hanhart, Alexey Nefediev, Juan Nieves, Qian Wang
Publikováno v:
Physics Letters B, Vol 833, Iss , Pp 137290- (2022)
We discuss some general features of the effective range expansion, the content of its parameters with respect to the nature of the pertinent near-threshold states and the necessary modifications in the presence of coupled channels, isospin violations
Externí odkaz:
https://doaj.org/article/ad4ae23edaa94875bf18f4d03e067c03
Autor:
Meng-Lin Du, Vadim Baru, Feng-Kun Guo, Christoph Hanhart, Ulf-G. Meißner, José A. Oller, Qian Wang
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 8, Pp 1-50 (2021)
Abstract The nature of the three narrow hidden-charm pentaquark P c states, i.e., P c (4312), P c (4440) and P c (4457), is under intense discussion since their discovery from the updated analysis of the process Λ b 0 → J / ψ pK − $$ {\Lambda}_
Externí odkaz:
https://doaj.org/article/c0009a956aa94883906241c2ea7fdb63
Autor:
Meng-Lin Du, Vadim Baru, Feng-Kun Guo, Christoph Hanhart, Ulf-G. Meißner, Alexey Nefediev, Igor Strakovsky
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 11, Pp 1-6 (2020)
Abstract The photoproduction of the $$J/\psi $$ J / ψ off the proton is believed to deepen our understanding of various physics issues. On the one hand, it is proposed to provide access to the origin of the proton mass, based on the QCD multipole ex
Externí odkaz:
https://doaj.org/article/e184f425bc294c21b305ab5b7baeb6ba
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 12, Pp 1-18 (2018)
Abstract We derive a new parametrization for the scalar pion form factors that allows us to analyze data over a large energy range via the inclusion of resonances, and at the same time to ensure consistency with the high-accuracy dispersive represent
Externí odkaz:
https://doaj.org/article/8ccfa6d821404115a0f40d5afdb867c1
Publikováno v:
Physics Letters B, Vol 736, Iss C, Pp 221-225 (2014)
Direct production of the charmonium-like state X(3872) in e+e− collisions is considered in the framework of the vector meson dominance model. An order-of-magnitude estimate for the width Γ(X→e+e−) is found to be ≳0.03 eV. The same approach a
Externí odkaz:
https://doaj.org/article/a1d4af32b5eb4a39bae2837dad5675e5
The internal structure of the charm-strange mesons $D_{s0}^*(2317)$ and $D_{s1}(2460)$ are subject of intensive studies. Their widths are small because they decay dominantly through isospin-breaking hadronic channels $D_{s0}^*(2317)^+\to D_s^+\pi^0$
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24ee9f04e49375ec5806c6e1e80278a1
http://arxiv.org/abs/2303.18225
http://arxiv.org/abs/2303.18225