ÚTEF - Ústav technické a experimentální fyziky ČVUT - České vysoké učení technické v Praze
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ÚTEF - Ústav technické a experimentální fyziky ČVUT - České vysoké učení technické v Praze
ČVUT - České vysoké učení technické v Praze
Publikace  > Články v impaktovaných časopisech  > 'High statistics measurement of Ke4 decay properties'
High statistics measurement of Ke4 decay properties

Autor

Rok
2003

Časopis
Phys. Rev. D 67, 072004

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Obsah
We report experimental details and results of a new measurement of the decay K+→π+π-e+νe(Ke4). A sample of more than 400,000 Ke4 events with low background has been collected by Experiment 865 at the Brookhaven Alternate Gradient Synchrotron. From these data, the branching ratio (4.11±0.01±0.11)×10-5 and the ππ invariant mass dependence of the form factors F, G, and H of the weak hadronic current as well as the phase shift difference δ00-δ11 for ππ scattering were extracted. Using constraints based on analyticity and chiral symmetry, a new value with considerably improved accuracy for the s-wave ππ scattering length a00 has been obtained also: a00=0.216±0.013 (stat)±0.002 (syst)±0.002 (theor).
Granty


Příklad citace článku:
S. Pislak, P. Lichard, . E865 Collaboration, "High statistics measurement of Ke4 decay properties", Phys. Rev. D 67, 072004 (2003)

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