{"id":"1d491b89-0d7f-4d85-9aae-3f97b9acfd3e","arxiv_id":"2505.03363","paper_version":2,"verdict":"CONDITIONAL","confidence":"MODERATE","novelty_score":6.0,"correctness_risk":"medium","formal_verification":"none","parameter_count":6,"one_line_summary":"A model with a strange quark, a diquark, and a kaon cloud gives Omega^- form factors in both spacelike and timelike regions and predicts the spin components of e+e- -> Omega^- anti-Omega^+.","lead":"This paper computes the electric and magnetic structure of the Omega-minus particle using a quark-diquark model with a kaon cloud around the strange quark. It compares the model with collider data and predicts how the particle spins when produced in electron-positron annihilation.","discovery_kind":"extension","skeptic_critique":{"model":"deepseek-v4-flash","headline":"The timelike bridge Eq. (7) is applied at q^2 just above threshold yet maps to spacelike Q^2 up to ~16 GeV^2, outside the fitted and validated range; the claimed data agreement and polarization predictions hinge on this unvalidated continuation.","rationale":"The reader's weakest_assumption already identifies the asymptotic continuation Eq. (7) as the load-bearing point, and our read agrees. We sharpen the concern by noting that the shift in Eq. (7) maps the timelike window onto spacelike Q^2 values (about 6.4 to 16.4 GeV^2) that are far outside the 0-2 GeV^2 range where the model is fitted to lattice QCD and where the meson-cloud delta_i plots are shown. Consequently, the agreement with CLEO/BESIII data in Fig. 10 depends on two untested ingredients: the validity of the Phragmen-Lindelof relation at tau near 1, and the model's behavior at high spacelike Q^2. The polarization predictions inherit the same issue, and the paper's own footnote 2 concedes that phase information is omitted. We found no internal algebraic inconsistency in the quark-diquark calculation itself, and the magnetic-moment comparison is a legitimate lattice-calibrated output, so a rejection is not warranted. The appropriate response is to keep the conditional verdict: acceptance should require either a direct justification of Eq. (7) in the applied range or a demonstration that the model's own analytic continuation gives the same timelike form factors.","tokens_in":16473,"tokens_out":6731,"duration_ms":70228,"concrete_test":"Compute the model's loop integrals directly at timelike q^2 values (q^2 = 12, 14, 16, 18, 20, 22 GeV^2) using the same dressed-quark vertex and regularization, i.e. evaluate the Feynman amplitudes of Eqs. (12)-(16) with positive q^2, and compare the resulting real parts, and also the magnitudes, with Eq. (7). If the direct timelike continuation disagrees with Eq. (7) at these energies, or develops substantial imaginary parts, then the effective form factor and polarization predictions in Figs. 9-12 are not supported. As a secondary cross-check, recompute |G_eff| with the alternative no-shift continuation G_TL(q^2) = G_SL(-q^2) and overlay the CLEO/BESIII data; if the agreement changes significantly, the reported match depends on the +2M^2 shift and the unvalidated large-Q^2 spacelike extrapolation.","verdict_should_be":"UNCHANGED","load_bearing_attack":"The central timelike results, including the effective form factor compared with CLEO/BESIII data and the polarization observables, all pass through Eq. (7), which is presented as an asymptotic consequence of the Phragmen-Lindelof theorem. That theorem equates limits as |q^2| -> infinity. The paper applies Eq. (7) at q^2 = 12 to 22 GeV^2, i.e. tau = q^2/(4M^2) from 1.07 to 1.97, only slightly above the pair-production threshold 4M^2 ~ 11.2 GeV^2. More concretely, the shift -q^2 + 2M^2 means that the spacelike input is evaluated at Q^2 = q^2 - 2M^2, which runs from about 6.4 to 16.4 GeV^2. The spacelike model, however, was fitted to lattice QCD data only for Q^2 <= 2 GeV^2, and the claimed Q^2-independence of the meson-cloud corrections (delta_E0 ~ 1%, delta_E2 ~ 2%, delta_M1 ~ 10%, delta_M3 ~ 15%) was extracted from Figures 5-8 in that same low-Q^2 window. Thus the timelike comparison does not test the model's continuum physics; it tests a continuation theorem at non-asymptotic scales plus an extrapolation of the spacelike form factors to momentum transfers where they have not been validated. The paper itself notes in footnote 2 that only real timelike form factors can be obtained, so the imaginary parts, which are generically nonzero above threshold, are dropped; this also affects the polarization formulas, which assume real form factors. If Eq. (7) is inaccurate in this kinematic window, the agreement in Fig. 10 and the polarization predictions are artifacts of the continuation rather than evidence for the quark-diquark-plus-kaon-cloud description.","agreement_with_reader":"agree"},"referee_report":{"model":"deepseek-v4-flash","summary":"The manuscript computes the four electromagnetic form factors (charge, electric-quadrupole, magnetic-dipole, magnetic-octupole) of the Omega^- hyperon in the spacelike region within a covariant quark-diquark model, in which the strange quark is dressed by a kaon meson cloud. The model parameters c2, c3, and mR are fitted to lattice QCD form factors at three unphysical pion masses, and the physical-point results are obtained by a linear mass extrapolation. Using the asymptotic relation Eq. (7), the authors continue the form factors to the timelike region, compare the resulting effective form factor with CLEO and BESIII data, and compute double differential cross sections and final-state spin components for e+e- -> Omega^- anti-Omega^+. The central claims are that the magnetic moment at the physical point agrees with experiment, that the kaon-cloud correction is nearly Q^2-independent and should therefore be included at all energies, and that the timelike effective form factor describes the experimental data within uncertainties.","tokens_in":16873,"tokens_out":9400,"duration_ms":86374,"significance":"If the timelike continuation were reliable, the paper would provide useful first quark-diquark predictions for Omega^- timelike form factors and polarization observables, and it would strengthen the case for meson-cloud effects in baryon structure. The spacelike calculation is internally coherent, the physical-point magnetic moment is a genuine extrapolation after fitting at unphysical pion masses, and the polarization predictions in Eqs. (28)-(30) are concrete and falsifiable at BESIII and Belle II. The kaon-cloud dressing is a systematic improvement over a point-like quark treatment. However, the timelike claims rest on an asymptotic relation applied in a non-asymptotic kinematic window, and the spacelike agreement with the fitted lattice data is not an independent test; these limitations materially reduce the force of the experimental comparisons.","major_comments":[{"comment":"The relation G_TL(q^2) = G_SL(-q^2 + 2M^2) is applied for q^2 between 12 and 22 GeV^2, which corresponds to spacelike Q^2 = q^2 - 2M^2 in the range 6.4 to 16.4 GeV^2. The Phragmen-Lindelof theorem invoked in Refs. [44,47] only equates the limits of the spacelike and timelike form factors as |q^2| tends to infinity, and no argument is given that this asymptotic regime has been reached at tau = q^2/(4M^2) ~ 1.1 to 2.0. Because the model was fitted to lattice data only for Q^2 <= 2 GeV^2, the timelike curves in Figs. 9 and 10 are obtained from an extrapolation of the spacelike form factors to large Q^2 combined with an assumed continuation. This is load-bearing for the central claim that \"the theoretical result can describe the experimental measurements within uncertainties\" (Sec. III.C): the quoted agreement is not a test of the model unless the validity of Eq. (7) in this kinematic window is assessed.","section":"Sec. III.C, Eq. (7)"},{"comment":"The parameters c2, c3, and mR are adjusted to reproduce the lattice QCD form factors, so the statement that \"the lattice QCD calculations can be well reproduced\" in Sec. III.B is a measure of fit quality rather than an independent prediction. The physical magnetic moment quoted in Sec. III.B is an extrapolation of the lattice-fitted inputs, and its agreement with the PDG value is partially inherited from this calibration. The paper should explicitly separate quantities that are predicted, such as radii, multipole ratios, and polarization observables, from quantities that are constrained by the fit.","section":"Sec. III.A and Fig. 5"},{"comment":"The claim that the kaon cloud effect \"remains almost unchanged as the energy becomes high\" and \"should be considered in all the energy region\" is based on the relative differences delta_i(Q^2) computed for Q^2 between 0 and 2 GeV^2. The model is not constrained at larger Q^2, and a nearly constant relative difference over this narrow interval does not logically imply constancy at the high-Q^2 values used in the timelike extension, up to about 16 GeV^2. This statement should be restricted to the computed range unless a separate argument for the high-Q^2 behavior is provided.","section":"Sec. III.B, Eq. (27), Fig. 8, and Summary"},{"comment":"The polarization observables are computed under the assumption that the timelike form factors are real, as acknowledged in footnote 2 and in the sentence \"three additional differential cross sections have been ignored because the EMFFs in the timelike region are also real in this work.\" Above the pair-production threshold the timelike form factors generically acquire imaginary parts from intermediate-state contributions, and the omitted phase information enters interference terms such as Re(G_E0 G_E2^*) in Eq. (29a) and Re(G_M1 G_M3^*) in Eq. (29c). The polarization predictions are therefore incomplete; they must either be derived from a model with complex timelike form factors or be presented with an explicit caveat that all phase effects are neglected.","section":"Sec. III.C, Eqs. (29a-c) and Fig. 11"}],"minor_comments":[{"comment":"The section title reads \"Quark-siquark approach\" and should be \"Quark-diquark approach\".","section":"Sec. II.B title"},{"comment":"The word \"timeklike\" appears repeatedly and should be corrected to \"timelike\".","section":"Sec. III.B and III.C"},{"comment":"The legend of Fig. 6 is garbled, with rotated or mojibake text that makes the comparison with other models unreadable; the figure should be regenerated.","section":"Figure 6"},{"comment":"The axis labels use \"Gev2\" instead of \"GeV^2\" throughout the figures.","section":"Figures 5, 7, 8, 10"},{"comment":"The phrase \"attracted from the total cross sections\" should be \"extracted from the total cross sections\".","section":"Sec. III.C"},{"comment":"The formula for dsigma_x_LT/dcosθ is missing parentheses around the difference of absolute values; as typeset it reads |A| - |B||C| rather than (|A| - |B|)|C|, which should be clarified.","section":"Eq. (29b)"}],"recommendation":"major_revision","confidential_remarks":"The main weakness of the manuscript is the unvalidated application of Eq. (7) in the timelike region. If the authors cannot validate or convincingly motivate the asymptotic relation in the 12-22 GeV^2 window, the timelike comparison should be repositioned as a speculative prediction rather than as a successful description of data. The paper would also benefit from an explicit discussion of the circularity in the lattice fit, and from a clearer separation of fitted, extrapolated, and predicted quantities. The spacelike calculation and the meson-cloud analysis are worth publishing in a suitably revised form."},"author_rebuttal":null,"desk_editor":{"model":"deepseek-v4-flash","letter":"Dear colleague,\n\nWhat you should know: this paper is a straightforward extension of the authors' earlier quark-diquark work on the Omega- form factors. The genuinely new ingredient is the kaon-cloud dressed strange quark, which adds a Pauli term to the quark electromagnetic vertex. That changes the magnetic moments and radii in the right direction, and the spacelike form factors look reasonable against lattice data. The timelike part is the soft spot: the authors use the asymptotic relation G_TL(q^2)=G_SL(-q^2+2M^2) at q^2 from about 12 to 22 GeV^2, which is only slightly above the Omega Omega-bar threshold. The relation is derived from Phragmen-Lindelof in the large-|q^2| limit; at these energies the spacelike input is evaluated at Q^2 ~ 6-16 GeV^2, far outside the region where the model was actually fitted (Q^2 <= 2 GeV^2). So the claimed agreement with CLEO/BESIII effective form factors is not a robust test of the model—it pretty much amounts to trusting an asymptotic continuation in a non-asymptotic regime, plus a low-Q^2 model extrapolated to high Q^2. The paper does note that only real form factors are obtained, but that means the phases are dropped, which also affects polarization observables.\n\nWhat's done well: the spacelike calculation is internally coherent. The kaon cloud is physically motivated, the parameters are few and clearly stated, and the comparison with lattice points is transparent. The magnetic moment comes out near the experimental value—probably a bit of calibration, since lattice fits determine the model parameters, but not a fatal flaw. The citations to the prior quark-diquark work and Ramalho's Omega- paper are appropriate.\n\nThe weak spots in proportion: (1) The 'meson cloud should be considered in all the energy region' claim is much stronger than the evidence. The Q^2-independence of delta_i is shown only up to Q^2=2 GeV^2. That's a real overstatement. (2) The timelike continuation. It would be fine if presented as a speculative extension with a caveat about the kinematic range, but at present the paper treats it as a prediction. (3) No uncertainties propagated from the fit parameters, so the 'within uncertainties' for the effective form factor is hard to judge.\n\nWho this is for: practitioners in hadron phenomenology, especially those using quark-diquark models or thinking about hyperon timelike form factors. It's not a groundbreaking paper, but it does add a new piece to a narrow, active topic.\n\nRecommendation: it deserves peer review, but the referee should ask the authors to either justify the use of Eq. (7) at these q^2 or clearly label the timelike results as model-dependent, and to soften the 'all energy region' claim. The spacelike results can stand on their own.","headline":"Solid spacelike quark-diquark calculation with a kaon cloud; the timelike bridge via asymptotic relations is overreaching and the 'all energy region' claim needs qualification.","tokens_in":17437,"tokens_out":3923,"would_cite":false,"duration_ms":33423,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":["13.40.Gp","14.20.Jn"],"model":"deepseek-v4-flash","headline":"A quark–diquark model with a kaon cloud reproduces the Omega-minus hyperon's electromagnetic form factors in both spacelike and timelike regions.","keywords":["Omega hyperon","electromagnetic form factors","quark-diquark model","kaon meson cloud","spacelike region","timelike region","spin-3/2 baryons","e+e- annihilation"],"falsifier":"A high-statistics angular-distribution measurement of $e^+e^- \\to \\Omega^- \\bar{\\Omega}^+$ that extracts $S_{LL}$, $S_{LT}$, and $S_{TT}$ would directly test the model: it predicts $\\cos\\theta$-even $S_{LL}$ and $S_{TT}$, a $\\cos\\theta$-odd $S_{LT}$ that vanishes along the beam, and a well-defined energy where longitudinal polarization takes over from transverse. If those patterns appear at the predicted $q^2$, the real continuation is supported; if the phases of the timelike form factors show up as measurable interference, the continuation is falsified. Alternatively, a lattice QCD computation of the effective timelike form factor just above $q^2 = 4M^2$ would test whether the asymptotic mirror holds at threshold.","tokens_in":16219,"feed_emoji":"⚛️","tokens_out":13553,"duration_ms":110693,"temperature":0.7,"pith_summary":"The paper sets out to show that the $\\Omega^-$ hyperon's four electromagnetic form factors—charge, magnetic-dipole, electric-quadrupole, and magnetic-octupole—can be described in one framework by a quark–diquark model in which the strange quark is dressed by a kaon-meson cloud. The dressing adds an anomalous magnetic term to the quark–photon vertex, and that term is what brings the magnetic moment to the measured value and enlarges the magnetic radius. The paper's central quantitative finding is that the meson-cloud correction is nearly independent of momentum transfer, remaining about 1% on the charge form factor, 2% on the electric-quadrupole, 10% on the magnetic-dipole, and 15% on the magnetic-octupole, across the spacelike range studied; the authors conclude the cloud cannot be neglected at any energy. Using an asymptotic continuation to the timelike region, the same calculation yields an effective form factor that matches electron-positron annihilation measurements within uncertainties. If correct, the work would give a single dressing prescription that covers both kinematic regions, and concrete, testable polarization patterns for the production process.","feed_headline":"Kaon cloud shifts Omega baryon form factors at all energies","feed_subtitle":"A quark-diquark model with a dressed strange quark matches timelike e+e− data and predicts final-state polarization.","key_machinery":"The argument is carried by a covariant quark–diquark description of the spin-3/2 hyperon plus a dressed-quark vertex. The vertex $j_s^\\mu = \\gamma^\\mu F_{1s}(q^2) + \\frac{i\\sigma^{\\mu q}}{2m_q} F_{2s}(q^2)$ is generated by a kaon-loop self-energy, giving the strange quark a size and an anomalous magnetic term that a point-like quark lacks; the wave-function renormalization $Z = 0.907$ fixes the probability of hitting the bare quark. The four physical form factors are read off from the Rarita–Schwinger current matrix elements through the standard definitions of $G_{E0}$, $G_{E2}$, $G_{M1}$, and $G_{M3}$. The bridge to the timelike region is the asymptotic relation $G^{TL}(q^2) = G^{SL}(-q^2 + 2M^2)$, which follows from the Phragmén–Lindelöf theorem and is applied with $q^2$ between about 12 and 22 GeV$^2$; it converts the spacelike curves into the effective form factor and into the helicity-amplitude combinations that produce the polarization predictions.","core_discovery":"Treating the $\\Omega^-$ as a bound state of one strange quark and an axial-vector diquark, with the quark's electromagnetic vertex dressed by a kaon loop, the paper reproduces the spacelike lattice form factors after fitting three parameters, and at the physical mass point obtains a magnetic moment $\\mu_{\\Omega^-} = -1.97\\,\\mu_N$ in agreement with experiment and equal charge and magnetic radii of $0.378\\,\\mathrm{fm}^2$. The kaon-cloud contributions to the four form factors are approximately constant in relative size: $\\delta_{E0}\\approx 1\\%$, $\\delta_{E2}\\approx 2\\%$, $\\delta_{M1}\\approx 10\\%$, and $\\delta_{M3}\\approx 15\\%$ up to $Q^2 = 2\\,\\mathrm{GeV}^2$, so the cloud matters most for the magnetic-octupole and least for the charge form factor. By applying the asymptotic relation $G^{TL}(q^2) = G^{SL}(-q^2 + 2M^2)$ for $q^2 > 4M^2$, the spacelike results are shifted into the timelike region, the effective form factor $|G^{eff}_{EM}(q^2)|$ matches the available $e^+e^-$ annihilation data within uncertainties, and the resulting spin-tensor cross sections predict that longitudinal polarization of the final $\\Omega^-$ dominates at high energies while transverse polarization is significant near threshold.","pith_inferences":["Because the continuation in Eq. (7) drops all phases, the polarization predictions are effectively predictions about the magnitudes of the form factors; a measurement sensitive to interference phases—for instance through polarized beams or final-state spin correlations—would test whether a complex extension is needed beyond the real approximation.","The same dressed-quark machinery could be applied to other decuplet baryons such as $\\Xi^*$ or $\\Delta$, with analogous kaon or pion clouds; if the near-constancy of the $\\delta_i$ is generic, model estimates of their high-$Q^2$ form factors could be corrected by a fixed percentage shift rather than a full recalculation.","The paper's neglect of the pion cloud for the strange quark is justified by isospin conservation, but whether heavier strange-light fluctuations (for example $K^*$ or two-meson states) introduce energy dependence at larger $Q^2$ remains open; extending the computation beyond $Q^2 = 2\\,\\mathrm{GeV}^2$ would test this."],"forward_implications":["The near-constancy of $\\delta_{E0}$, $\\delta_{E2}$, $\\delta_{M1}$, $\\delta_{M3}$ means a meson-cloud correction fitted at low $Q^2$ remains valid at higher energies, so omitting the cloud would systematically misestimate magnetic-dipole and magnetic-octupole predictions by 10–15% everywhere.","The magnetic radius, previously underestimated without the cloud, changes substantially and now equals the charge radius ($0.378\\,\\mathrm{fm}^2$), while the electric radius changes little; this gives a concrete signature for future scattering experiments.","The timelike effective form factor built from real, phase-less continuation agrees with current $e^+e^-$ production data, which supports using the same model to predict observables in the unmeasured parts of the timelike region.","In $e^+e^- \\to \\Omega^- \\bar{\\Omega}^+$, the model predicts that the longitudinal spin component $S_{LL}$ grows with energy while $S_{TT}^{xx}$ falls, with transverse polarization vanishing along the beam direction; these angular patterns are directly testable at current and future facilities."],"supporting_citations":[{"why":"Supplies the lattice QCD spacelike form factors at several pion masses; these are the data the three model parameters are fitted to.","marker":"[18]"},{"why":"Defines the four independent electromagnetic form factors of a spin-3/2 particle through the Rarita–Schwinger current.","marker":"[11]"},{"why":"Earlier quark-diquark calculation of the Omega-minus form factors without the meson cloud, which this work extends by dressing the strange quark.","marker":"[41]"},{"why":"Provides the asymptotic spacelike-to-timelike continuation relation used to reach the timelike region.","marker":"[44]"},{"why":"Supplies the dressed-quark vertex with meson-cloud form factors and the proper-time regularization parameters used for the kaon loop.","marker":"[45]"},{"why":"Gives the helicity formalism and spin-tensor decomposition from which the polarization-dependent cross sections are constructed.","marker":"[63]"},{"why":"Provides one of the recent electron-positron annihilation data sets used to compare the predicted effective timelike form factor.","marker":"[16]"},{"why":"Provides the newest electron-positron annihilation data set near 4.2 GeV used in the effective form factor comparison.","marker":"[17]"},{"why":"Provides the earlier measurement of hyperon timelike form factors that the effective form factor comparison also uses.","marker":"[50]"}],"fun_headline_variants":["Kaon cloud persists at all energies in Omega form factors","Omega e+e- data fit by kaon-cloud dressed diquark model","Polarization of Omega from e+e- predicted in quark-diquark model","Timelike Omega form factors derived from spacelike via asymptotic relation","Magnetic octupole feels kaon cloud most at all energies"],"cache_read_input_tokens":3200,"weakest_assumption_plain":"The load-bearing premise is that the asymptotic mirror relation between spacelike and timelike form factors, $G^{TL}(q^2) = G^{SL}(-q^2 + 2M^2)$, remains accurate at the moderate timelike momenta where the data sit—even though the relation is derived for very large $|q^2|$ and discards all phases; if that premise fails, the timelike comparison and the polarization predictions collapse even though the spacelike calculation may stand.","fun_headline_variants_meta":{"raw":{"variants":["Kaon cloud persists at all energies in Omega form factors","Omega e+e- data fit by kaon-cloud dressed diquark model","Polarization of Omega from e+e- predicted in quark-diquark model","Timelike Omega form factors derived from spacelike via asymptotic relation","Magnetic octupole feels kaon cloud most at all energies"]},"model":"deepseek-v4-flash","effort":"low","cost_usd":0.002123,"raw_usage":{"total_tokens":8292,"prompt_tokens":1043,"completion_tokens":7249,"prompt_tokens_details":{"cached_tokens":384},"prompt_cache_hit_tokens":384,"prompt_cache_miss_tokens":659,"completion_tokens_details":{"reasoning_tokens":7156}},"tokens_in":659,"tokens_out":7249,"duration_ms":44619,"temperature":1.0,"reasoning_tokens":7156,"cache_read_input_tokens":384,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-08-15T23:53:23.031454+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":"A high-statistics angular-distribution measurement of $e^+e^- \\to \\Omega^- \\bar{\\Omega}^+$ that extracts $S_{LL}$, $S_{LT}$, and $S_{TT}$ would directly test the model: it predicts $\\cos\\theta$-even $S_{LL}$ and $S_{TT}$, a $\\cos\\theta$-odd $S_{LT}$ that vanishes along the beam, and a well-defined energy where longitudinal polarization takes over from transverse. If those patterns appear at the predicted $q^2$, the real continuation is supported; if the phases of the timelike form factors show up as measurable interference, the continuation is falsified. Alternatively, a lattice QCD computation of the effective timelike form factor just above $q^2 = 4M^2$ would test whether the asymptotic mirror holds at threshold.","supporting_citations":[{"cited_title":"Alexandrou, T","cited_arxiv_id":null,"evidence_quote":"Supplies the lattice QCD spacelike form factors at several pion masses; these are the data the three model parameters are fitted to."},{"cited_title":"Nozawa and D","cited_arxiv_id":null,"evidence_quote":"Defines the four independent electromagnetic form factors of a spin-3/2 particle through the Rarita–Schwinger current."},{"cited_title":"Form fac- tors of Ω− in a covariant quark-diquark approach","cited_arxiv_id":null,"evidence_quote":"Earlier quark-diquark calculation of the Omega-minus form factors without the meson cloud, which this work extends by dressing the strange quark."},{"cited_title":null,"cited_arxiv_id":null,"evidence_quote":"Provides the asymptotic spacelike-to-timelike continuation relation used to reach the timelike region."},{"cited_title":"Clo¨ et, Wolfgang Bentz, and Anthony W","cited_arxiv_id":null,"evidence_quote":"Supplies the dressed-quark vertex with meson-cloud form factors and the proper-time regularization parameters used for the kaon loop."},{"cited_title":"Refined analysis of Ω− ¯Ω+ polarization in electron-positron anni- hilation process","cited_arxiv_id":null,"evidence_quote":"Gives the helicity formalism and spin-tensor decomposition from which the polarization-dependent cross sections are constructed."},{"cited_title":"Study of e+e−→Ω− ¯Ω+ at center- of-mass energies from 3.49 to 3.67 GeV","cited_arxiv_id":null,"evidence_quote":"Provides one of the recent electron-positron annihilation data sets used to compare the predicted effective timelike form factor."},{"cited_title":"Dobbs, Kamal K","cited_arxiv_id":null,"evidence_quote":"Provides the earlier measurement of hyperon timelike form factors that the effective form factor comparison also uses."}],"review_version":1}