Infrared-suppressed QCD coupling and the hadronic contribution to muon g-2

Cvetic G, Kögerler R (2020)
Journal of Physics G: Nuclear and Particle Physics 47(10): 10LT01.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Cvetic, Gorazd; Kögerler, ReinhartUniBi
Abstract / Bemerkung
A variant of QCD with the coupling suppressed in the infrared (IR) regime, as suggested by large-volume lattice calculations of the Landau gauge gluon and ghost dressing functions, is considered. The coupling is further restricted by the condition of approximate coincidence with perturbative QCD in the high momentum regime, and by the tau-lepton semihadronic decay rate in the intermediate momentum regime, the rate which is evaluated by a renormalon-motivated resummation method. The obtained coupling turns out to be free of Landau singularities. The D = 4, 6 condensate values of the Adler function are then extracted by application of the Borel sum rules to the OPAL and ALEPH (V + A)-channel data of tau-decay, and the corresponding V-channel condensate values are deduced as well. We then show that the correct value of the hadronic vacuum polarization contribution to the muon anomalous magnetic moment, a(mu)(had(1)), is reproduced by regularizing the D = 4, 6 OPE terms in the V-channel Adler function with IR-regularization masses M-D/2 less than or similar to 1 GeV, suggesting the internal consistency of the presented QCD framework.
Stichworte
perturbative QCD; resummation; QCD phenomenology; lattice QCD
Erscheinungsjahr
2020
Zeitschriftentitel
Journal of Physics G: Nuclear and Particle Physics
Band
47
Ausgabe
10
Art.-Nr.
10LT01
ISSN
0954-3899
eISSN
1361-6471
Page URI
https://pub.uni-bielefeld.de/record/2945829

Zitieren

Cvetic G, Kögerler R. Infrared-suppressed QCD coupling and the hadronic contribution to muon g-2. Journal of Physics G: Nuclear and Particle Physics. 2020;47(10): 10LT01.
Cvetic, G., & Kögerler, R. (2020). Infrared-suppressed QCD coupling and the hadronic contribution to muon g-2. Journal of Physics G: Nuclear and Particle Physics, 47(10), 10LT01. doi:10.1088/1361-6471/aba421
Cvetic, G., and Kögerler, R. (2020). Infrared-suppressed QCD coupling and the hadronic contribution to muon g-2. Journal of Physics G: Nuclear and Particle Physics 47:10LT01.
Cvetic, G., & Kögerler, R., 2020. Infrared-suppressed QCD coupling and the hadronic contribution to muon g-2. Journal of Physics G: Nuclear and Particle Physics, 47(10): 10LT01.
G. Cvetic and R. Kögerler, “Infrared-suppressed QCD coupling and the hadronic contribution to muon g-2”, Journal of Physics G: Nuclear and Particle Physics, vol. 47, 2020, : 10LT01.
Cvetic, G., Kögerler, R.: Infrared-suppressed QCD coupling and the hadronic contribution to muon g-2. Journal of Physics G: Nuclear and Particle Physics. 47, : 10LT01 (2020).
Cvetic, Gorazd, and Kögerler, Reinhart. “Infrared-suppressed QCD coupling and the hadronic contribution to muon g-2”. Journal of Physics G: Nuclear and Particle Physics 47.10 (2020): 10LT01.

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arXiv: 2007.05584

Inspire: 1806574

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