Measurement of D{sup 0}-D{sup 0} Mixing Parameters Using D{sup 0}{yields}K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} and D{sup 0}{yields}K{sub S}{sup 0}K{sup +}K{sup -} Decays

Journal Article · Fri Aug 20 04:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.081803· OSTI ID:21470971

Amo Sanchez, P del; Lees, J P; Poireau, V; Prencipe, E; Tisserand, V ^[1]; Garra Tico, J; Grauges, E ^[2]; Martinelli, M; Palano, A; Pappagallo, M ^[3]; Eigen, G; Stugu, B; Sun, L ^[4]; Battaglia, M; Brown, D N; Hooberman, B; Kerth, L T; Kolomensky, Yu G; Lynch, G; Osipenkov, I L ^[5]

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1. Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France)
2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
3. INFN Sezione di Bari, I-70126 Bari (Italy)
4. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
5. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

We report a direct measurement of D{sup 0}-D{sup 0} mixing parameters through a time-dependent amplitude analysis of the Dalitz plots of D{sup 0}{yields}K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} and, for the first time, D{sup 0}{yields}K{sub S}{sup 0}K{sup +}K{sup -} decays. The low-momentum pion {pi}{sub s}{sup +} in the decay D{sup *+{yields}}D{sup 0{pi}}{sub s}{sup +} identifies the flavor of the neutral D meson at its production. Using 468.5 fb{sup -1} of e{sup +}e{sup -} colliding-beam data recorded near {radical}(s)=10.6 GeV by the BABAR detector at the PEP-II asymmetric-energy collider at SLAC, we measure the mixing parameters x=[1.6{+-}2.3(stat){+-}1.2(syst){+-}0.8(model)]x10{sup -3}, and y=[5.7{+-}2.0(stat){+-}1.3(syst){+-}0.7(model)]x10{sup -3}. These results provide the best measurement to date of x and y. The knowledge of the value of x, in particular, is crucial for understanding the origin of mixing.

• OSTI ID: 21470971
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 8 Vol. 105; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ASYMMETRY
BEAMS
BOSONS
CHARM PARTICLES
CHARMED MESONS
COLLIDING BEAMS
COMPOSITE MODELS
D MESONS
D NEUTRAL MESONS
D*-2010 MESONS
DALITZ PLOT
DECAY
DIAGRAMS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FLAVOR MODEL
HADRONS
INFORMATION
INTERACTIONS
KAONS
KAONS MINUS
KAONS NEUTRAL
KAONS NEUTRAL SHORT-LIVED
KAONS PLUS
LEPTON-LEPTON INTERACTIONS
MATHEMATICAL MODELS
MESONS
MIXING
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
PEP STORAGE RINGS
PIONS
PIONS MINUS
PSEUDOSCALAR MESONS
QUARK MODEL
SCATTERPLOTS
STORAGE RINGS
STRANGE MESONS
STRANGE PARTICLES
TIME DEPENDENCE
VECTOR MESONS