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Observation of D+ --> etae + nue.

R E Mitchell1, M R Shepherd, D Besson

  • 1Indiana University, Bloomington, Indiana 47405, USA.

Physical Review Letters
|March 5, 2009
PubMed
Summary
This summary is machine-generated.

Researchers observed the decay of a D+ meson into eta and a neutrino. New upper limits were set for related decays, improving upon previous experimental results.

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Area of Science:

  • Particle Physics
  • High Energy Physics
  • Experimental Physics

Background:

  • The study of D+ meson decays provides insights into fundamental particle interactions.
  • Understanding these decays is crucial for testing the Standard Model of particle physics.

Purpose of the Study:

  • To report the first observation of the decay D+ --> etae + nue.
  • To establish more restrictive upper limits for the decays D+ --> eta'e + nue and D+ --> varphie + nue.

Main Methods:

  • Data collected at the psi(3770) resonance using the CLEO-c detector at the Cornell Electron Storage Ring.
  • Analysis of a 281 pb-1 data sample.

Main Results:

  • First observation of the decay D+ --> etae + nue.
  • Set upper limits for D+ --> eta'e + nue and D+ --> varphie + nue decays, significantly more restrictive than previous experiments.

Conclusions:

  • The observed decay provides new data for the study of D+ meson properties.
  • The improved upper limits place tighter constraints on potential new physics beyond the Standard Model.