2023-05-31 15:00  P7F/Online

[Journal Club] Dispersive determination of Higgs boson mass

Prof. Hsiang-nan Li

We extract the Higgs boson mass from the dispersion relation obeyed by the correlation function of two b-quark scalar currents. The solution to the dispersion relation with the input from the perturbative evaluation of the correlation function up to next-to-leading order in QCD and with the b quark mass m_b=4.43 GeV demands a specific Higgs mass 114^{+12}_{-2} GeV. Our observation offers an alternative resolution to the long-standing fine-tuning problem of the SM: the Higgs mass is fixed dynamically for the internal consistency of the SM. The similar formalism leads to the Z boson mass 90.8 GeV and the top quark mass 176 GeV. (arXiv:2304.05921)