Hadron production by<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>annihilation at center-of-mass energies between 2.6 and 7.8 GeV. I. Total cross section, multiplicities, and inclusive momentum distributions

Siegrist, J.; Schwitters, R. F.; Alam, M. S.; Boyarski, A. M.; Breidenbach, M.; Bulos, F.; Dakin, J.T.; Dorfan, J.; Feldman, G. J.; Fryberger, D.; Hanson, G.; Jaros, J. A.; Jean‐Marie, B.; Larsen, R. R.; Lüth, V.; Lynch, H. L.; Lyon, D.; Morehouse, C. C.; Перл, М.; Peruzzi, I.; Piccolo, M.; Pun, T. P.; Rapidis, P. A.; Richter, B.; Schindler, R. H.; Tanenbaum, W.; Vannucci, F.; Chinowsky, W.; Abrams, G. S.; Briggs, D.; Carithers, W.; Cooper, S.; DeVoe, R.; Friedberg, C. E.; Goldhaber, G.; Hollebeek, R. J.; Johnson, A. D.; Kadyk, J. A.; Litke, A. M.; Madaras, R. J.; Nguyen, H. K.; Pierre, F.; Sadoulet, B.; Trilling, G. H.; Whitaker, J. S.; Wiss, J.

doi:10.1103/physrevd.26.969

Cited by 113 publications

(36 citation statements)

References 58 publications

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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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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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“…Early measurements of R = σ(e + e − → hadrons)/σ(e + e − → µ + µ − ) at √ s ≃ 1 − 3 GeV indeed observed R ≈ 2 as predicted by the quark-parton model for u, d and s quarks [99]. However, the measurements were difficult to interpret quantitatively due to the presence of resonances.…”

Section: Highlights Of Qcd Before the Lep Aeramentioning

confidence: 98%

Tests of quantum chromo dynamics at e⁺e⁻ colliders

Kluth¹

2006

Rep. Prog. Phys.

107

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Abstract.The current status of tests of the theory of strong interactions, Quantum Chromo Dynamics (QCD), with data from hadron production in e + e − annihilation experiments is reviewed. The LEP experiments ALEPH, DELPHI, L3 and OPAL have published many analyses with data recorded on the Z 0 resonance at √ s = 91.2 GeV and above up to √ s > 200 GeV. There are also results from SLD at √ s = 91.2 GeV and from reanalysis of data recorded by the JADE experiment at 14 ≤ √ s ≤ 44 GeV. The results of studies of jet and event shape observables, of particle production and of quark gluon jet differences are compared with predictions by perturbative QCD calculations. Determinations of the strong coupling constant α S (m Z 0 ) from jet and event shape observables, scaling violation and fragmentation functions, inclusive observables from Z 0 decays, hadronic τ decays and hadron production in low energy e + e − annihilation are discussed. Updates of the measurements are performed where new data or improved calculations have become available. The best value of α S (m Z 0 ) is obtained from an average of measurements using inclusive observables calculated in NNLO QCD: α S (m Z 0 ) = 0.1211 ± 0.0021 where the error is dominated by theoretical systematic uncertainties. The other measurements of α S (m Z 0 ) are in good agreement with this value. Finally, investigations of the gauge structure of QCD are summarised and the best values for the colour factors are determined: C A = 2.89 ± 0.21 C F = 1.30 ± 0.09 with errors dominated by systematic uncertainties and in good agreement with the expectation from QCD with the SU(3) gauge symmetry.

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“…at 90% C.L.. A puzzling phenomenon of the Y(4260) is that it is absent in the R value scan [137,138,139,140,129,141], which is the challenge to the traditional vector charmonium interpretation of the Y(4260). We note that the R value denotes the ratio of the rate of hadron production to that for muon pairs in the annihilation of e + e − pair, i.e., R = σ(e + e − → hadrons)/σ(e + e − → µ + µ − ).…”

Section: Its Open Charm Decay Modesmentioning

confidence: 99%

The hidden-charm pentaquark and tetraquark states

et al. 2016

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In the past decade many charmonium-like states were observed experimentally. Especially those charged charmoniumlike Z c states and bottomonium-like Z b states can not be accommodated within the naive quark model. These charged Z c states are good candidates of either the hidden-charm tetraquark states or molecules composed of a pair of charmed mesons. Recently, the LHCb Collaboration discovered two hidden-charm pentaquark states, which are also beyond the quark model. In this work, we review the current experimental progress and investigate various theoretical interpretations of these candidates of the multiquark states. We list the puzzles and theoretical challenges of these models when confronted with the experimental data. We also discuss possible future measurements which may distinguish the theoretical schemes on the underlying structures of the hidden-charm multiquark states.

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Hadron production bye+e−annihilation at center-of-mass energies between 2.6 and 7.8 GeV. I. Total cross section, multiplicities, and inclusive momentum distributions

Cited by 113 publications

References 58 publications

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

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

Tests of quantum chromo dynamics at e⁺e⁻ colliders

The hidden-charm pentaquark and tetraquark states

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Hadron production bye+e−annihilation at center-of-mass energies between 2.6 and 7.8 GeV. I. Total cross section, multiplicities, and inclusive momentum distributions

Cited by 113 publications

References 58 publications

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

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

Tests of quantum chromo dynamics at e+e− colliders

The hidden-charm pentaquark and tetraquark states

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Product

Resources

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Tests of quantum chromo dynamics at e⁺e⁻ colliders