High statistics measurement of the K+->pi(0)e(+)nu (Ke3(+)) branching ratio.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F03%3A20000012" target="_blank" >RIV/47813059:19240/03:20000012 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

High statistics measurement of the K+->pi(0)e(+)nu (Ke3(+)) branching ratio.

Original language description

E865 at the Brookhaven National Laboratory AGS collected about 70 000 K-e3(+) events to measure the K-e3(+) branching ratio relative to the observed K+-->pi(+)pi(0), K+-->pi(0)mu(+)nu, and K+-->pi(+)pi(0)pi(0) decays. The pi(0) in all the decays was detected using the e(+)e(-) pair from pi(0)-->e(+)e(-)gamma decay and no photons were required. Using the 2002 Particle Data Group branching ratios for the normalization decays, we obtain BR(K-e3(gamma)(+))=(5.13+/-0.02(stat)+/-0.09(syst)+/-0.04(norm))%, where K-e3(gamma)(+) includes the effect of virtual and real photons. This result is approximate to2.3sigma higher than the current Particle Data Group value. Implications for the V-us element of the CKM matrix, and the matrix's unitarity are discussed.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BF - Elementary particle theory and high energy physics

OECD FORD branch

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Project

<a href="/en/project/GA202%2F01%2F1592" target="_blank" >GA202/01/1592: Many-body initial states in dilepton production</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2003

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physical Review Letters

ISSN

0031-9007

e-ISSN

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Volume of the periodical

91

Issue of the periodical within the volume

26

Country of publishing house

US - UNITED STATES

Number of pages

3

Pages from-to

2618021-4

UT code for WoS article

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EID of the result in the Scopus database

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