Measurement of the 
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Ачасов, М. Н.; Dimova, T.; Kononov, S.A.; Onuchin, A. P.; Beloborodov, K.; Berdyugin, A. V.; Kovrizhin, D. P.; Kravchenko, E. A.; Koop, I. A.; Koshuba, S. V.; Голубев, В. Б.; Berkaev, D. E.; Kardapoltsev, L.; Kharlamov, A. G.; Богданчиков, А. Г.; Aulchenko, V.; Usov, Y.; Пахтусова, Е. В.; Serednyakov, S. I.; Martin, K. A.; Korol, A. A.; Zemlyansky, I. M.; Vasiljev, A. V.; Shatunov, P. Yu.; Бузыкаев, А. Р.; Perevedentsev, E. A.; Rogovsky, Yu. A.; Shatunov, Yu. M.; Barnyakov, A.; Surin, I. K.; Otboyev, A. V.; Barnyakov, M.Yu.; Shtol, D.; Obrazovsky, A. E.; Tikhonov, Yu. A.; Skrinsky, A.N.; Лысенко, А. П.; Botov, A. A.; Силагадзе, З. К.; Kupich, A.

doi:10.1103/physrevd.94.112006

Cited by 38 publications

(20 citation statements)

References 35 publications

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“…In particular, as shown in Fig. 6, at low ffiffiffiffiffi q 2 p , the DM2 experiment [19] collected data in the range ð1.05 ≤ ffiffiffiffiffi q 2 p ≤ 2.00Þ GeV, while the SND experiment [20] covered the interval FIG. 6.…”

Section: The Weird Case Of ωπmentioning

confidence: 99%

“…6. Data on the dressed nonresonant cross section σðe þ e − → ωπ 0 Þ from SND [20] (empty circles), DM2 [19] (empty squares), BES [21] (empty stars), CLEO [22] (empty diamonds), and Belle [23] (empty triangles). The red and blue curves represent the fits described in the text, and the vertical dashed line indicates the J=ψ mass.…”

Section: The Weird Case Of ωπmentioning

confidence: 99%

See 1 more Smart Citation

New G -parity violating amplitude in the J/ψ decay?

Ferroli¹,

Mori²,

Destefanis³

et al. 2017

Phys. Rev. D

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The J=ψ meson has negative G parity so that, in the limit of isospin conservation, its decay into π þ π − should be purely electromagnetic. However, the measured branching fraction BðJ=ψ → π þ π − Þ exceeds by more than 4.5 standard deviations the expectation computed according to BABAR data on the e þ e − → π þ π − cross section. The possibility that the two-gluon plus one-photon decay mechanism is not suppressed by G-parity conservation is discussed, even by considering other multipion decay channels. As also obtained by phenomenological computation, such a decay mechanism could be responsible for the observed discrepancy. Finally, we notice that the BESIII experiment, having the potential to perform an accurate measurement of the e þ e − → π þ π − cross section in the J=ψ mass energy region, can definitely prove or disprove this strong G-parity-violating mechanism by confirming or confuting the BABAR data.

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Section: The Weird Case Of ωπmentioning

confidence: 99%

Section: The Weird Case Of ωπmentioning

confidence: 99%

New G -parity violating amplitude in the J/ψ decay?

Ferroli¹,

Mori²,

Destefanis³

et al. 2017

Phys. Rev. D

View full text Add to dashboard Cite

show abstract

“…The existing CMD-2 scans in the same region [47] are omitted from this work as they suffer from an overestimation of the trigger efficiency for slow kaons [46] and are awaiting reanalysis [48]. In addition, two new scans by the SND Collaboration measured at the tail of the ϕ and into the continuum are included [49]. The systematic uncertainties of these two scans, along with the existing two scans by SND [26], are considered to be fully correlated [39].…”

Section: Kk Channelsmentioning

confidence: 99%

Zeroing in on the Muon’s Magnetism

Roberts

2018

Physics

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This work presents a complete reevaluation of the hadronic vacuum polarization contributions to the anomalous magnetic moment of the muon, a had;VP μ , and the hadronic contributions to the effective QED coupling at the mass of the Z boson, Δα had ðM 2 Z Þ, from the combination of e þ e − → hadrons cross section data. Focus has been placed on the development of a new data combination method, which fully incorporates all correlated statistical and systematic uncertainties in a bias free approach. All available e þ e − → hadrons cross section data have been analyzed and included, where the new data compilation has yielded the full hadronic R-ratio and its covariance matrix in the energy range m π ≤ ffiffi ffi s p ≤ 11.2 GeV. Using these combined data and perturbative QCD above that range results in estimates of the hadronic vacuum polarization contributions to g − 2 of the muon of a had;LO VP μ ¼ ð693.26 AE 2.46Þ × 10 −10 and a had;NLO VP μ ¼ ð−9.82 AE 0.04Þ × 10 −10. The new estimate for the Standard Model prediction is found to be a SM μ ¼ ð11659182.04 AE 3.56Þ × 10 −10 , which is 3.7σ below the current experimental measurement. The prediction for the five-flavor hadronic contribution to the QED coupling at the Z boson mass is Δα ð5Þ had ðM 2 Z Þ ¼ ð276.11 AE 1.11Þ × 10 −4 , resulting in α −1 ðM 2 Z Þ ¼ 128.946 AE 0.015. Detailed comparisons with results from similar related works are given.

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“…energy range from 1.1 GeV to 2 GeV. The previous measurements of this cross section were performed with the SND [1] and BaBar [2] detectors.…”

Section: Introductionmentioning

confidence: 99%

Study of the e⁺e⁻→ K_S K_Lπ⁰ process up to 2 GeV with the CMD-3 detector at the VEPP-2000 collider

et al. 2019

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Measurement of the e+e−→K+K−

Abstract: The e + e − → KSKLπ 0 cross section is measured in the center-of-mass energy range √ s = 1.3−2.0 GeV. The analysis is based on the data sample with an integrated luminosity of 33.5 pb −1 collected with the SND detector at the VEPP-2000 e + e − collider.

Cited by 38 publications

References 35 publications

New G -parity violating amplitude in the J/ψ decay?

New G -parity violating amplitude in the J/ψ decay?

Zeroing in on the Muon’s Magnetism

Study of the e⁺e⁻→ K_S K_Lπ⁰ process up to 2 GeV with the CMD-3 detector at the VEPP-2000 collider

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Measurement of the e+e−→K+K−

Abstract: The e + e − → KSKLπ 0 cross section is measured in the center-of-mass energy range √ s = 1.3−2.0 GeV. The analysis is based on the data sample with an integrated luminosity of 33.5 pb −1 collected with the SND detector at the VEPP-2000 e + e − collider.

Cited by 38 publications

References 35 publications

New G -parity violating amplitude in the J/ψ decay?

New G -parity violating amplitude in the J/ψ decay?

Zeroing in on the Muon’s Magnetism

Study of the e+e−→ KS KLπ0 process up to 2 GeV with the CMD-3 detector at the VEPP-2000 collider

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Study of the e⁺e⁻→ K_S K_Lπ⁰ process up to 2 GeV with the CMD-3 detector at the VEPP-2000 collider