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Description
| - We report experimental details and results of a new measurement of the decay K+-->pi(+)pi(-)e(+)nu(e)(K-e4). A sample of more than 400,000 K-e4 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)x10(-5) and the pipi invariant mass dependence of the form factors F, G, and H of the weak hadronic current as well as the phase shift difference delta(0)(0)-delta(1)(1) for pipi scattering were extracted. Using constraints based on analyticity and chiral symmetry, a new value with considerably improved accuracy for the s-wave pipi scattering length a(0)(0) has been obtained also: a(0)(0)=0.216+/-0.013 (stat)+/-0.002 (syst)+/-0.002 (theor).
- We report experimental details and results of a new measurement of the decay K+-->pi(+)pi(-)e(+)nu(e)(K-e4). A sample of more than 400,000 K-e4 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)x10(-5) and the pipi invariant mass dependence of the form factors F, G, and H of the weak hadronic current as well as the phase shift difference delta(0)(0)-delta(1)(1) for pipi scattering were extracted. Using constraints based on analyticity and chiral symmetry, a new value with considerably improved accuracy for the s-wave pipi scattering length a(0)(0) has been obtained also: a(0)(0)=0.216+/-0.013 (stat)+/-0.002 (syst)+/-0.002 (theor). (en)
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Title
| - High statistics measurement of K-e4 decay properties.
- High statistics measurement of K-e4 decay properties. (en)
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skos:prefLabel
| - High statistics measurement of K-e4 decay properties.
- High statistics measurement of K-e4 decay properties. (en)
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skos:notation
| - RIV/47813059:19240/03:20000011!RIV/2004/GA0/192404/N
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http://linked.open.../vavai/riv/strany
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http://linked.open...avai/riv/aktivita
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http://linked.open...avai/riv/aktivity
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http://linked.open...iv/cisloPeriodika
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http://linked.open...vai/riv/dodaniDat
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http://linked.open...aciTvurceVysledku
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http://linked.open.../riv/druhVysledku
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http://linked.open...iv/duvernostUdaju
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http://linked.open...titaPredkladatele
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http://linked.open...dnocenehoVysledku
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http://linked.open...ai/riv/idVysledku
| - RIV/47813059:19240/03:20000011
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http://linked.open...riv/jazykVysledku
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http://linked.open.../riv/klicovaSlova
| - pi-pi- scattering; chiral perturbation-theory; K-L4 form-factors; low energy; particle physics; one-loop; 2 loops; constants; quark mass (en)
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http://linked.open.../riv/klicoveSlovo
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http://linked.open...odStatuVydavatele
| - US - Spojené státy americké
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http://linked.open...ontrolniKodProRIV
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http://linked.open...i/riv/nazevZdroje
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http://linked.open...in/vavai/riv/obor
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http://linked.open...ichTvurcuVysledku
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http://linked.open...cetTvurcuVysledku
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http://linked.open...ocetUcastnikuAkce
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http://linked.open...nichUcastnikuAkce
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http://linked.open...vavai/riv/projekt
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http://linked.open...UplatneniVysledku
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http://linked.open...v/svazekPeriodika
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http://linked.open...iv/tvurceVysledku
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issn
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number of pages
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http://localhost/t...ganizacniJednotka
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