Electron–positron annihilation into three pions and the radiative return

Czyż, Henryk; Grzelińska, Agnieszka; Kühn, Johann H.; Rodrigo, Germán

doi:10.1140/epjc/s2006-02614-7

Cited by 50 publications

(84 citation statements)

References 25 publications

(43 reference statements)

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“…An indirect comparison of the results in Refs. [3,6,7] was also reported in Ref. [8] via a comparison of the two Monte Carlo programs PHOKHARA [9] and KK MC [10], as these two Monte Carlos have the realizations of the results in Ref.…”

mentioning

confidence: 72%

“…[6,7], where the result is obtained by an independent method via a leptonic tensor calculated to investigate radiative return, with particular emphasis on the 1-2 GeV cms energy regime. This permits a cross-check at the NNLL level of the corresponding results.…”

mentioning

confidence: 99%

“…[8] via a comparison of the two Monte Carlo programs PHOKHARA [9] and KK MC [10], as these two Monte Carlos have the realizations of the results in Ref. [6,7] (PHOKHARA) and Ref. [3] ( KK MC).…”

mentioning

confidence: 99%

“…[7] The squared matrix element for real photon emission can be obtained by contracting this with a final-state tensor…”

mentioning

confidence: 99%

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THE VIRTUAL CORRECTION TO BREMSSTRAHLUNG IN RESULTS HIGH-ENERGY e⁺e^- ANNIHILATION: COMPARISON OF EXACT RESULTS

Yost

Glosser

Jadach

et al. 2005

High Energy Physics

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We have compared the virtual corrections to single hard bremsstrahlung as calculated by S. Jadach, M. Melles, B.F.L. Ward and S.A. Yost to several other expressions. The most recent of these comparisons is to the leptonic tensor calculated by J.H. Kühn and G. Rodrigo for radiative return. Agreement is found to within 10 −5 or better, as a fraction of the Born cross section, for most of the range of photon energies. The massless limits have been shown to agree analytically to NLL order.

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confidence: 72%

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confidence: 99%

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THE VIRTUAL CORRECTION TO BREMSSTRAHLUNG IN RESULTS HIGH-ENERGY e⁺e^- ANNIHILATION: COMPARISON OF EXACT RESULTS

Yost

Glosser

Jadach

et al. 2005

High Energy Physics

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“…The main difference in the event selection with respect to the LA analysis is that the detection of the ISR photon is vetoed. The simulation of signal and ISR background events makes use of the Phokhara [25] event generator, which takes into account next-to-leading-order radiative corrections. The maximum transverse momentum of the pp system must be smaller than 0.15 GeV/c, and the missing mass squared M 2 miss < 1 GeV/c 2 , consistently with an event with a missing photon at small polar angle.…”

Section: Measurement Of E + E − → Ppmentioning

confidence: 99%

The time-like electromagnetic form factors of proton and charged kaon at high energies

Anulli¹

2016

AIP Conference Proceedings

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Abstract. The Initial State Radiation method in the BABAR experiment has been used to measure the time-like electromagnetic form factors at the momentum transfer from 9 to 42 (GeV/c) 2 for proton and from 7 to 56 (GeV/c) 2 for charged kaon. The obtained data show the tendency to approach the QCD asymptotic prediction for kaons and space-like form factor values for proton. The BABAR data have been used together with data from other experiments, to perform a model-independent determination of the relative phases between the single-photon and the three-gluon amplitudes in ψ → KK decays. The values of the branching fractions measured in the reaction e + e − → K + K − are shifted due to interference of resonant and nonresonant amplitudes. We have determined the absolute values of the shifts to be 5% for J/ψ and 15% for ψ(2S) decays.

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Complete QED NLO contributions to the reaction e + e − → μ + μ − γ and their implementation in the event generator PHOKHARA

Campanario

Czyż

Gluza

et al. 2014

J. High Energ. Phys.

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KLOE and Babar have an observed discrepancy of 2% to 5% in the invariant pion pair production cross section. These measurements are based on approximate NLO µ + µ − γ cross section predictions of the Monte Carlo event generator PHOKHARA7.0. In this article, the complete NLO radiative corrections to µ + µ − γ production are calculated and implemented in the Monte Carlo event generator PHOKHARA9.0. Numerical reliability is guaranteed by two independent approaches to the real and the virtual corrections. The novel features include the contribution of pentagon diagrams in the virtual corrections, which form a gauge-invariant set when combined with their box diagram partners. They may contribute to certain distributions at the percent level. Also the real emission was complemented with two-photon final state emission contributions not included in the generator PHOKHARA7.0. We demonstrate that the numerical influence reaches, for realistic charge-averaged experimental setups, not more than 0.1% at KLOE and 0.3% at BaBar energies. As a result, we exclude the approximations in earlier versions of PHOKHARA as origin of the observed experimental discrepancy.

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Electron–positron annihilation into three pions and the radiative return

Cited by 50 publications

References 25 publications

THE VIRTUAL CORRECTION TO BREMSSTRAHLUNG IN RESULTS HIGH-ENERGY e⁺e^- ANNIHILATION: COMPARISON OF EXACT RESULTS

THE VIRTUAL CORRECTION TO BREMSSTRAHLUNG IN RESULTS HIGH-ENERGY e⁺e^- ANNIHILATION: COMPARISON OF EXACT RESULTS

The time-like electromagnetic form factors of proton and charged kaon at high energies

Complete QED NLO contributions to the reaction e + e − → μ + μ − γ and their implementation in the event generator PHOKHARA

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Electron–positron annihilation into three pions and the radiative return

Cited by 50 publications

References 25 publications

THE VIRTUAL CORRECTION TO BREMSSTRAHLUNG IN RESULTS HIGH-ENERGY e+e- ANNIHILATION: COMPARISON OF EXACT RESULTS

THE VIRTUAL CORRECTION TO BREMSSTRAHLUNG IN RESULTS HIGH-ENERGY e+e- ANNIHILATION: COMPARISON OF EXACT RESULTS

The time-like electromagnetic form factors of proton and charged kaon at high energies

Complete QED NLO contributions to the reaction e + e − → μ + μ − γ and their implementation in the event generator PHOKHARA

Contact Info

Product

Resources

About

THE VIRTUAL CORRECTION TO BREMSSTRAHLUNG IN RESULTS HIGH-ENERGY e⁺e^- ANNIHILATION: COMPARISON OF EXACT RESULTS

THE VIRTUAL CORRECTION TO BREMSSTRAHLUNG IN RESULTS HIGH-ENERGY e⁺e^- ANNIHILATION: COMPARISON OF EXACT RESULTS