Standard

γ* → γf 2(1270) and γ* → γa 2(1320) Transition Form Factors in e + e − Collisions. / Achasov, N. N.; Kiselev, A. V.

In: Physics of Atomic Nuclei, Vol. 81, No. 1, 01.01.2018, p. 43-50.

Research output: Contribution to journal › Article › peer-review

Harvard

Achasov, NN & Kiselev, AV 2018, 'γ* → γf 2(1270) and γ* → γa 2(1320) Transition Form Factors in e + e − Collisions', Physics of Atomic Nuclei, vol. 81, no. 1, pp. 43-50. https://doi.org/10.1134/S1063778818010027

APA

Achasov, N. N., & Kiselev, A. V. (2018). γ* → γf 2(1270) and γ* → γa 2(1320) Transition Form Factors in e + e − Collisions. Physics of Atomic Nuclei, 81(1), 43-50. https://doi.org/10.1134/S1063778818010027

Vancouver

Achasov NN, Kiselev AV. γ* → γf 2(1270) and γ* → γa 2(1320) Transition Form Factors in e + e − Collisions. Physics of Atomic Nuclei. 2018 Jan 1;81(1):43-50. doi: 10.1134/S1063778818010027

Author

Achasov, N. N. ; Kiselev, A. V. / γ* → γf 2(1270) and γ* → γa 2(1320) Transition Form Factors in e + e − Collisions. In: Physics of Atomic Nuclei. 2018 ; Vol. 81, No. 1. pp. 43-50.

BibTeX

@article{8a890cde25ca434b99c0e6e68965cbc2,
title = "γ* → γf 2(1270) and γ* → γa 2(1320) Transition Form Factors in e + e − Collisions",
abstract = "The γ* → γf2(1270) and γ* → γa2(1320) transition form factors are considered up to high energies, along with the cross sections for the respective processes e+e− → γ* → f2γ and e+e− → γ* → a2γ. It is shown that QCD asymptotic behavior of the amplitudes for the reactions e+e− → γ* → f2γ and e+e− → γ* → a2γ can be reached after the compensation of the contributions of the ρ(770) and ω(782) mesons with the contributions of their radial excitations. The ratio σ(e+e− → γ* → f2γ)/σ(e+e− → γ* → a2γ) ≈ 25/9, obtained on the basis of the two-quark model of a2 and f2 and within QCD, is used to determine σ(e+e− → γ* → a2γ) at high energies. Recent data from the Belle detector on the γ*(Q2)γ → f2 transition over the region extending up to Q2 = 30 GeV2 are taken into account. A substantial improvement of experimental accuracies is required for a detailed comparison of our predictions with experimental data at high energies. A recent measurement of the e+e− → f2γ → π+π−γ cross section at 10.58 GeV with the BaBar detector gives grounds to hope for this.",
keywords = "RESONANCES, BEHAVIOR",
author = "Achasov, {N. N.} and Kiselev, {A. V.}",
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language = "English",
volume = "81",
pages = "43--50",
journal = "Physics of Atomic Nuclei",
issn = "1063-7788",
publisher = "Maik Nauka-Interperiodica Publishing",
number = "1",

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RIS

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AU - Kiselev, A. V.

PY - 2018/1/1

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N2 - The γ* → γf2(1270) and γ* → γa2(1320) transition form factors are considered up to high energies, along with the cross sections for the respective processes e+e− → γ* → f2γ and e+e− → γ* → a2γ. It is shown that QCD asymptotic behavior of the amplitudes for the reactions e+e− → γ* → f2γ and e+e− → γ* → a2γ can be reached after the compensation of the contributions of the ρ(770) and ω(782) mesons with the contributions of their radial excitations. The ratio σ(e+e− → γ* → f2γ)/σ(e+e− → γ* → a2γ) ≈ 25/9, obtained on the basis of the two-quark model of a2 and f2 and within QCD, is used to determine σ(e+e− → γ* → a2γ) at high energies. Recent data from the Belle detector on the γ*(Q2)γ → f2 transition over the region extending up to Q2 = 30 GeV2 are taken into account. A substantial improvement of experimental accuracies is required for a detailed comparison of our predictions with experimental data at high energies. A recent measurement of the e+e− → f2γ → π+π−γ cross section at 10.58 GeV with the BaBar detector gives grounds to hope for this.

AB - The γ* → γf2(1270) and γ* → γa2(1320) transition form factors are considered up to high energies, along with the cross sections for the respective processes e+e− → γ* → f2γ and e+e− → γ* → a2γ. It is shown that QCD asymptotic behavior of the amplitudes for the reactions e+e− → γ* → f2γ and e+e− → γ* → a2γ can be reached after the compensation of the contributions of the ρ(770) and ω(782) mesons with the contributions of their radial excitations. The ratio σ(e+e− → γ* → f2γ)/σ(e+e− → γ* → a2γ) ≈ 25/9, obtained on the basis of the two-quark model of a2 and f2 and within QCD, is used to determine σ(e+e− → γ* → a2γ) at high energies. Recent data from the Belle detector on the γ*(Q2)γ → f2 transition over the region extending up to Q2 = 30 GeV2 are taken into account. A substantial improvement of experimental accuracies is required for a detailed comparison of our predictions with experimental data at high energies. A recent measurement of the e+e− → f2γ → π+π−γ cross section at 10.58 GeV with the BaBar detector gives grounds to hope for this.

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