Test of Lepton Flavour Universality in K+−>l+ν Decays

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Test of Lepton Flavour Universality in K+−>l+ν Decays. / Lazzeroni, Cristina; Romano, Angela; Hallgren, Bjorn.

In: Physics Letters B, Vol. B698, No. 2, 04.04.2011, p. 105-114.

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@article{7c00e94293ab444bacab1cb6937c3319,
title = "Test of Lepton Flavour Universality in K+−>l+ν Decays",
abstract = "A precision test of lepton flavour universality has been performed by measuring the ratio RKRK of kaon leptonic decay rates K+→e+νK+→e+ν and K+→μ+νK+→μ+ν in a sample of 59 813 reconstructed K+→e+νK+→e+ν candidates with (8.71±0.24)%(8.71±0.24)% background contamination. The result RK=(2.487±0.013)×10−5RK=(2.487±0.013)×10−5 is in agreement with the Standard Model expectation.",
keywords = "Lepton universality, Leptonic kaon decay",
author = "Cristina Lazzeroni and Angela Romano and Bjorn Hallgren",
year = "2011",
month = apr,
day = "4",
doi = "10.1016/j.physletb.2011.02.064",
language = "English",
volume = "B698",
pages = "105--114",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "Elsevier",
number = "2",

}

RIS

TY - JOUR

T1 - Test of Lepton Flavour Universality in K+−>l+ν Decays

AU - Lazzeroni, Cristina

AU - Romano, Angela

AU - Hallgren, Bjorn

PY - 2011/4/4

Y1 - 2011/4/4

N2 - A precision test of lepton flavour universality has been performed by measuring the ratio RKRK of kaon leptonic decay rates K+→e+νK+→e+ν and K+→μ+νK+→μ+ν in a sample of 59 813 reconstructed K+→e+νK+→e+ν candidates with (8.71±0.24)%(8.71±0.24)% background contamination. The result RK=(2.487±0.013)×10−5RK=(2.487±0.013)×10−5 is in agreement with the Standard Model expectation.

AB - A precision test of lepton flavour universality has been performed by measuring the ratio RKRK of kaon leptonic decay rates K+→e+νK+→e+ν and K+→μ+νK+→μ+ν in a sample of 59 813 reconstructed K+→e+νK+→e+ν candidates with (8.71±0.24)%(8.71±0.24)% background contamination. The result RK=(2.487±0.013)×10−5RK=(2.487±0.013)×10−5 is in agreement with the Standard Model expectation.

KW - Lepton universality

KW - Leptonic kaon decay

U2 - 10.1016/j.physletb.2011.02.064

DO - 10.1016/j.physletb.2011.02.064

M3 - Article

VL - B698

SP - 105

EP - 114

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

IS - 2

ER -