The search for narrow resonances in the reactione + e ??hardrons at centre-of-mass energy range between 7.23 and 10.34 GeV

Blinov, A. E.; Blinov, V. E.; Beilin, M. V.; Bondar, A.; Bukin, A. D.; Groshev, V.R.; Eidelman, Yu.I.; Киселев, В. А.; Klimenko, S.; Mishnev, S. I.; Muratov, V.V.; Onuchin, A. P.; Panin, V.S.; Petrov, Vladimir; Protopopov, I.Ya.; Shamov, A.G.; Sidorov, V.; Skovpen, Yu. I.; Skrinsky, A.N.; Tayursky, V.A.; Telnov, V. I.; Temnykh, A.; Tikhonov, Yu. A.; Tymaikin, G. M.; Undrus, A.; Воробйов, А.І.; Zhilich, V.; Zholents, A.

doi:10.1007/bf01555496

Cited by 13 publications

(10 citation statements)

References 11 publications

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“…The R measurements in this region are essentially provided by the γγ2 [34] and MARK I [35] collaborations. MARK I data above 5 GeV lie systematically above the measurements of the Crystal Ball [36] and MD1 [37] Collaborations as well as the QCD prediction.…”

mentioning

confidence: 53%

Improved determination of α(MZ2) and the anomalous magnetic moment of the muon

1998

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We reevaluate the hadronic contribution to the running of the QED fine structure constant α(s) at s = M 2 Z . We use data from e + e − annihilation and τ decays at low energy and at the qq thresholds, where resonances occur. Using so-called spectral moments and the Operator Product Expansion (OPE), it is shown that a reliable theoretical prediction of the hadronic production rate R(s) is available at relatively low energies. Its application improves significantly the precision on the hadronic vacuum polarization contribution. We obtain ∆α had (M 2 Z ) = (277.8 ± 2.6) × 10 −4 yielding α −1 (M 2 Z ) = 128.923 ± 0.036. Inserting this value in a global electroweak fit using current experimental input, we constrain the mass of the Standard Model Higgs boson to be M Higgs = 129 +103 −62 GeV. Analogously, we improve the precision of the hadronic contribution to the anomalous magnetic moment of the muon for which we obtain a had

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mentioning

confidence: 53%

Improved determination of α(MZ2) and the anomalous magnetic moment of the muon

1998

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“…Values of R for each of the energy points are shown in Table VII and are presented in Fig. 10 along with MARK I [21], MD1 [22], Crystal Ball [23], and prior CLEO [17] results. Our new measurements of R are in good agreement with previous MD1, Crystal Ball, and CLEO measurements; however, they do not agree with the MARK I results.…”

Section: Systematic Uncertainties and Resultsmentioning

confidence: 99%

Measurement of the total hadronic cross section ine+e−annihilation below 10.56 GeV

Besson¹,

Pedlar²,

Cronin-Hennessy³

et al. 2007

Phys. Rev. D

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“…-At higher energy the total cross section ratio R is measured inclusively. We use the data provided by the experiments γγ2 [56], MARK I [57], DELCO [58], DASP [59], PLUTO [60], LENA [61], Crystal Ball [62], MD-1 [63], CELLO [64], JADE [65], MARK-J [66], TASSO [67], CLEO [68], CUSB [69] and MAC [70]. Above 3.5 GeV the measurements of the MARK I Collaboration are significantly higher than those from LENA, PLUTO and Crystal Ball.…”

Section: The Origin Of the Datamentioning

confidence: 99%

Improved determination of the hadronic contribution to the muon ( ${g-2}$) and to ${\alpha(M_{\mathrm Z}^2)}$ Using new data from hadronic $\tau$ decays

Alemany¹,

Davier²,

Höcker³

1998

Eur. Phys. J. C

200

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We have reevaluated the hadronic contribution to the anomalous magnetic moment of the muon (g − 2) and to the running of the QED fine structure constant α(s) at s = M 2 Z . We incorporated new data from hadronic τ decays, recently published by the ALEPH Collaboration. In addition, compared to previous analyses, we use more extensive e + e − annihilation data sets. The integration over the total hadronic cross section is performed using experimental data up to 40 GeV and results from perturbative QCD above 40 GeV. The improvement from τ data concerns mainly the pion form factor, where the uncertainty in the corresponding integral could be reduced by more than a factor of two. We obtain for the lowest order hadronic vacuum polarization graph a had µ = (695.0 ± 15.0)×10 −10 and ∆α (5) had (M 2 Z ) = (280.9 ± 6.3)×10 −4 using e + e − data only. The corresponding results for combined e + e − and τ data are a had µ = (701.1 ± 9.4)×10 −10 and ∆α (5) had (M 2 Z ) = (281.7 ± 6.2) ×10 −4 , where the latter is calculated using the contribution from the five lightest quarks.

show abstract

The search for narrow resonances in the reactione + e ??hardrons at centre-of-mass energy range between 7.23 and 10.34 GeV

Cited by 13 publications

References 11 publications

Improved determination of α(MZ2) and the anomalous magnetic moment of the muon

Improved determination of α(MZ2) and the anomalous magnetic moment of the muon

Measurement of the total hadronic cross section ine+e−annihilation below 10.56 GeV

Improved determination of the hadronic contribution to the muon ( ${g-2}$) and to ${\alpha(M_{\mathrm Z}^2)}$ Using new data from hadronic $\tau$ decays

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