Precision Measurement of the Ratio of the Charged Kaon Leptonic Decay Rates - INSPIRE

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Precision Measurement of the Ratio of the Charged Kaon Leptonic Decay Rates

NA62

Collaboration

•

C. Lazzeroni
(
- Birmingham U.
)

Dec, 2012

18 pages

Published in:

Phys.Lett.B 719 (2013) 326-336

Published: Feb 26, 2013

e-Print:

1212.4012 [hep-ex]

DOI:

10.1016/j.physletb.2013.01.037

PDG:

{{\mathit K}^{+}}

\rightarrow

{{\mathit \mu}^{+}}{{\mathit \nu}_{{{\mu}}}}

Report number:

CERN-PH-EP-2012-367

Experiments:

CERN-NA-062

View in:

reference search189 citations

Citations per year

Abstract: (Elsevier)

A precision measurement of the ratio R_K of the rates of kaon leptonic decays K^+/-->e^+/-@n and K^+/-->@m^+/-@n with the full data sample collected by the NA62 experiment at CERN in 2007-2008 is reported. The result, obtained by analysing ~150000 reconstructed K^+/-->e^+/-@n candidates with 11% background contamination, is R_K=(2.488+/-0.010)x10^-^5, in agreement with the Standard Model expectation.

Note:

Accepted for publication in Physics Letters B (18 January 2013). 18 pages, 6 figures

K: leptonic decay
precision measurement
decay rate: ratio
CERN SPS
NA62
experimental results
K+ --> positron neutrino/e
K+ --> muon+ neutrino/mu

References(18)

Figures(15)

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