% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Holz:907692,
      author       = {Holz, Simon and Hanhart, Christoph and Hoferichter, Martin
                      and Kubis, Bastian},
      title        = {{A} dispersive analysis of ${\eta '\rightarrow \pi ^+\pi
                      ^-\gamma }$ and ${\eta '\rightarrow \ell ^+\ell ^-\gamma }$},
      journal      = {The European physical journal / C},
      volume       = {82},
      number       = {5},
      issn         = {1434-6044},
      address      = {Heidelberg},
      publisher    = {Springer},
      reportid     = {FZJ-2022-02163},
      pages        = {434},
      year         = {2022},
      abstract     = {We present a dispersive representation of the η′
                      transition form factor that allows one to account, in a
                      consistent way, for the effects of ρ–ω mixing in both
                      the isoscalar and the isovector contributions. Using this
                      formalism, we analyze recent data on η′→π+π−γ to
                      constrain the isovector part of the form factor,
                      individually and in combination with data for the pion
                      vector form factor, which suggests a tension in the ρ–ω
                      mixing parameter. As a first application, we use our
                      results, in combination with the most recent input for the
                      isoscalar part of the form factor, to predict the
                      corresponding spectrum of η′→ℓ+ℓ−γ, in
                      particular we find the slope parameter
                      bη′=1.455(24)GeV−2. With forthcoming data on the latter
                      process, our results establish the necessary framework to
                      improve the evaluation of the η′-pole contribution to the
                      anomalous magnetic moment of the muon using experimental
                      input from both η′ decay channels.},
      cin          = {IAS-4 / IKP-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-4-20090406 / I:(DE-Juel1)IKP-3-20111104},
      pnm          = {5111 - Domain-Specific Simulation Data Life Cycle Labs
                      (SDLs) and Research Groups (POF4-511) / DFG project
                      196253076 - TRR 110: Symmetrien und Strukturbildung in der
                      Quantenchromodynamik (196253076)},
      pid          = {G:(DE-HGF)POF4-5111 / G:(GEPRIS)196253076},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {35578684},
      UT           = {WOS:000794907700004},
      doi          = {10.1140/epjc/s10052-022-10247-7},
      url          = {https://juser.fz-juelich.de/record/907692},
}