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Limits on W_{R} from Meson Decays.

Gustavo F S Alves1, Chee Sheng Fong2, Luighi P S Leal3

  • 1Fermilab, Instituto de Física, Universidade de São Paulo, C.P. 66.318, 05315-970 São Paulo, Brazil and Particle Theory Department, P.O. Box 500, Batavia, Illinois 60510, USA.

Physical Review Letters
|November 1, 2024
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This summary is machine-generated.

Pseudoscalar meson leptonic decays constrain the mass of right-handed W bosons (W_R). This study sets the most stringent experimental limits on W_R mass for heavy neutrinos, specifically between 50-1900 MeV.

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Area of Science:

  • Particle Physics
  • High Energy Physics
  • Beyond Standard Model Physics

Background:

  • Left-right symmetric models propose a right-handed W boson (W_R).
  • Experimental constraints on W_R mass are crucial for testing these models.
  • Pseudoscalar meson leptonic decays offer a potential probe for new physics.

Purpose of the Study:

  • To establish stringent limits on the mass of the right-handed W boson (W_R).
  • To utilize pseudoscalar meson leptonic decay data for constraining W_R mass.
  • To explore the implications for heavy neutrino masses within specific ranges.

Main Methods:

  • Analysis of experimental data from pseudoscalar meson leptonic decays.
  • Application of theoretical frameworks, specifically left-right symmetric models.
  • Calculation of exclusion limits on W_R mass based on decay data.

Main Results:

  • Pseudoscalar meson leptonic decay data yield stringent limits on W_R mass.
  • For heavy neutrinos with masses between 50-1900 MeV, W_R mass is constrained to be above 4-19 TeV at 90% confidence level.
  • These results represent the most stringent experimental limits on W_R mass for this heavy neutrino mass range.

Conclusions:

  • Pseudoscalar meson leptonic decays are effective in constraining W_R boson properties.
  • The study provides significant experimental bounds on W_R mass, impacting theories beyond the Standard Model.
  • Future studies can further refine these limits with more precise experimental data.