On the transition form factors of the axial-vector resonance f1(1285) and its decay into e+e−

Zanke, Marvin; Hoferichter, Martin; Kubis, Bastian

doi:10.1007/jhep07(2021)106

Cited by 54 publications

(38 citation statements)

References 157 publications

(280 reference statements)

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“…Some recent developments include refs [34][35][36][37][38][39][40]. for hadronic vacuum polarization and refs [41][42][43][44][45][46][47][48]. for hadronic light-by-light scattering.…”

mentioning

confidence: 99%

Consequences of chirally enhanced explanations of (g − 2)μ for h → μμ and Z → μμ

Crivellin

Hoferichter

2021

J. High Energ. Phys.

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With the long-standing tension between experiment and Standard-Model (SM) prediction in the anomalous magnetic moment of the muon aμ recently reaffirmed by the Fermilab experiment, the crucial question becomes which other observables could be sensitive to the underlying physics beyond the SM to which aμ may be pointing. While from the effective field theory (EFT) point of view no direct correlations exist, this changes in specific new physics models. In particular, in the case of explanations involving heavy new particles above the electroweak (EW) scale with chiral enhancement, which are preferred to evade exclusion limits from direct searches, correlations with other observables sensitive to EW symmetry breaking are expected. Such scenarios can be classified according to the SU(2)L representations and the hypercharges of the new particles. We match the resulting class of models with heavy new scalars and fermions onto SMEFT and study the resulting correlations with h → μμ and Z → μμ decays, where, via SU(2)L symmetry, the latter process is related to Z → νν and modified W-μ-ν couplings.

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“…Some recent developments include refs [34][35][36][37][38][39][40]. for hadronic vacuum polarization and refs [41][42][43][44][45][46][47][48]. for hadronic light-by-light scattering.…”

mentioning

confidence: 99%

Consequences of chirally enhanced explanations of (g − 2)μ for h → μμ and Z → μμ

Crivellin

Hoferichter

2021

J. High Energ. Phys.

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“…with the energy-dependent width chosen in accordance with the parameterization employed for g 1 1 [40][41][42] (see Ref. [47] for alternatives),…”

Section: Isovector Partmentioning

confidence: 99%

“…in which case the uncertainty is dominated by subleading contributions beyond pseudoscalar poles and two-meson cuts, see Refs. [47,[151][152][153][154][155][156][157][158][159] for recent work in this direction. Meanwhile, KK states prove to be appreciably suppressed compared to their ππ analog, which is true for both the leading box contributions (estimated in VMD [34] or DS equations [35,36]) and rescattering corrections [157], in the latter case despite the strong coupling between the ππ and KK channels via the f 0 (980).…”

Section: Kaon-box Contribution To Hlbl Scatteringmentioning

confidence: 99%

Kaon electromagnetic form factors in dispersion theory

Stamen,

Hariharan,

Hoferichter

et al. 2022

Preprint

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The electromagnetic form factors of charged and neutral kaons are strongly constrained by their lowenergy singularities, in the isovector part from twopion intermediate states and in the isoscalar contribution in terms of ω and φ residues. The former can be predicted using the respective ππ → KK partialwave amplitude and the pion electromagnetic form factor, while the latter parameters need to be determined from electromagnetic reactions involving kaons. We present a global analysis of time-and spacelike data that implements all of these constraints. The results enable manifold applications: kaon charge radii, elastic contributions to the kaon electromagnetic self energies and corrections to Dashen's theorem, kaon boxes in hadronic light-by-light (HLbL) scattering, and the φ region in hadronic vacuum polarization (HVP). Our main results are: r 2 c = 0.359(3) fm 2 , r 2 n = −0.060(4) fm 2 for the charged and neutral radii, = 0.63( 40) for the elastic contribution to the violation of Dashen's theorem, a K-box µ = −0.48(1) × 10 −11 for the charged kaon box in HLbL scattering, and a HVP µ [K + K − , ≤ 1.05 GeV] = 184.5(2.0) × 10 −11 , a HVP µ [K S K L , ≤ 1.05 GeV] = 118.3(1.5) × 10 −11 for the HVP integrals around the φ resonance. The global fit to KK gives Mφ = 1019.479(5) MeV, Γφ = 4.207(8) MeV for the φ resonance parameters including vacuumpolarization effects.

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“…. Note that for HLbL scattering there is good agreement between phenomenology and lattice QCD, see Refs [42][43][44][45][46][47][48][49]. for some recent developments.…”

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confidence: 82%

Mixed leptonic and hadronic corrections to the anomalous magnetic moment of the muon

Hoferichter,

Teubner

2021

Preprint

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Higher-order hadronic corrections to the anomalous magnetic moment of the muon have been evaluated including next-to-next-toleading-order insertions of hadronic vacuum polarization and next-to-leading-order corrections to hadronic light-by-light scattering. This leaves a set of mixed leptonic and hadronic corrections in the form of double-bubble topologies as the only remaining hadronic effect at O(α 4 ). Here, we estimate these contributions by analyzing the respective cuts of the diagrams, suggesting that the impact is limited to 1 × 10 −11 and thus negligible at the level of the final precision of the Fermilab g − 2 experiment.

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On the transition form factors of the axial-vector resonance f1(1285) and its decay into e+e−

Cited by 54 publications

References 157 publications

Consequences of chirally enhanced explanations of (g − 2)μ for h → μμ and Z → μμ

Consequences of chirally enhanced explanations of (g − 2)μ for h → μμ and Z → μμ

Kaon electromagnetic form factors in dispersion theory

Mixed leptonic and hadronic corrections to the anomalous magnetic moment of the muon

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