Lattice QCD Calculation of Hadronic Light-by-Light Scattering
نویسندگان
چکیده
منابع مشابه
Hadronic light-by-light scattering contribution to the muon anomalous magnetic moment from lattice QCD.
The most compelling possibility for a new law of nature beyond the four fundamental forces comprising the standard model of high-energy physics is the discrepancy between measurements and calculations of the muon anomalous magnetic moment. Until now a key part of the calculation, the hadronic light-by-light contribution, has only been accessible from models of QCD, the quantum description of th...
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For reliable comparison of the standard model prediction to the muon g−2 with its experimental value, the hadronic light-by-light scattering (HLbL) contribution must be calculated by lattice QCD simulation. HLbL contribution has many types of disconnected-type diagrams. Here, we start with recalling the point that must be taken care of in every method to calculate them by lattice QCD, and prese...
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The hadronic light-by-light scattering contribution to muon g −2 is examined using low energy effective theories of QCD, the Nambu-Jona-Lasinio model and hidden local chiral symmetry, as guides. Our result is −36 × 10 −11 with an uncertainty of ±16 × 10 −11 , which includes our best estimate of model dependence. This is within the expected measurement uncertainty of 40 × 10 −11 in the forthcomi...
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We consider an impact of hadronic light-by-light scattering on the muonium hyperfine structure. A shift of the hyperfine interval ∆ν(Mu)HLBL is calculated with the light-by-light scattering approximated by exchange of pseudoscalar and pseudovector mesons. Constraints from the operator product expansion in QCD are used to fix parameters of the model similar to the one used earlier for the hadron...
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Kevin T. Engel, Hiren H. Patel, and Michael J. Ramsey-Musolf California Institute of Technology, Pasadena, California 91125, USA Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA and Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA (Received ...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2015
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.115.222003