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Type: Artigo de periódico
Title: Detailed Study Of The Kl→π0π0π0 Dalitz Plot
Author: Abouzaid E.
Arenton M.
Barker A.R.
Bellantoni L.
Blucher E.
Bock G.J.
Cheu E.
Coleman R.
Corcoran M.D.
Cox B.
Erwin A.R.
Escobar C.O.
Glazov A.
Golossanov A.
Gomes R.A.
Gouffon P.
Hsiung Y.B.
Jensen D.A.
Kessler R.
Kotera K.
Ledovskoy A.
McBride P.L.
Monnier E.
Nguyen H.
Niclasen R.
Phillips D.G.
Ramberg E.J.
Ray R.E.
Ronquest M.
Santos E.
Slater W.
Smith D.
Solomey N.
Swallow E.C.
Toale P.A.
Tschirhart R.
Wah Y.W.
Wang J.
White H.B.
Whitmore J.
Wilking M.J.
Winstein B.
Winston R.
Worcester E.T.
Yamanaka T.
Zimmerman E.D.
Zukanovich R.F.
Abstract: Using a sample of 68.3×106 KL→π0π0π0 decays collected in 1996-1999 by the KTeV (E832) experiment at Fermilab, we present a detailed study of the KL→π0π0π0 Dalitz plot density. We report the first observation of interference from KL→π+π-π0 decays in which π+π- rescatters to π0π0 in a final-state interaction. This rescattering effect is described by the Cabibbo-Isidori model, and it depends on the difference in pion scattering lengths between the isospin I=0 and I=2 states, a0-a2. Using the Cabibbo-Isidori model, and fixing (a0-a2)mπ+=0. 268±0.017 as measured by the CERN-NA48 collaboration, we present the first measurement of the KL→π0π0π0 quadratic slope parameter that accounts for the rescattering effect: h000=(+0.59±0.20stat±0. 48syst±1.06ext)×10-3, where the uncertainties are from data statistics, KTeV systematic errors, and external systematic errors. Fitting for both h000 and a0-a2, we find h000=(-2.09±0.62stat±0. 72syst±0.28ext)×10-3, and mπ+(a0-a2)=0.215±0. 014stat±0.025syst±0.006ext; our value for a0-a2 is consistent with that from NA48. © 2008 The American Physical Society.
Citation: Physical Review D - Particles, Fields, Gravitation And Cosmology. , v. 78, n. 3, p. - , 2008.
Rights: aberto
Identifier DOI: 10.1103/PhysRevD.78.032009
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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