Experimental Study of the Radiative Decays K+ -> mu+ nu e+e- and K+ -> e+ nu e+e-
A. A. Poblaguev (4), R. Appel (6,3), G. S. Atoyan (4), B. Bassalleck, (2), D. R. Bergman (6), N. Cheung (3), S. Dhawan (6), H. Do (6), J. Egger, (5), S. Eilerts (2), W. Herold (5), V. V. Issakov (4), H. Kaspar (5), D. E., Kraus (3), D. M. Lazarus (1), P. Lichard (3), J. Lowe (2)
TL;DR
This study reports precise measurements of the branching ratios and form factors for the radiative decays of K+ mesons into muons or electrons with neutrinos and electron-positron pairs, providing experimental data for theoretical models.
Contribution
The paper presents new experimental measurements of branching ratios and decay form factors for K+ -> mu+ nu e+e- and K+ -> e+ nu e+e- decays, improving existing data.
Findings
Branching ratio for K+ -> e+ nu e+e-: (2.48+-0.14+-0.14)x10^-8
Branching ratio for K+ -> mu+ nu e+e-: (7.06+-0.16+-0.26)x10^-8
Measured decay form factors for both decay modes
Abstract
Experiment 865 at the Brookhaven AGS obtained 410 K+ -> e+ nu e+e- and 2679 K+ -> mu+ nu e+e- events including 10% and 19% background. The branching ratios were measured to be (2.48+-0.14(stat.)+-0.14(syst.))x10^-8 (m_ee>150 MeV) and (7.06+-0.16+-0.26)x10^-8 (m_ee>145 MeV), respectively. Results for the decay form factors are presented.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.