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Measurement of D0-D̄0 mixing parameters using D0→KS0π+π-and D0→KS0K+K-decays

  • Author(s): Del Amo Sanchez, P
  • Lees, JP
  • Poireau, V
  • Prencipe, E
  • Tisserand, V
  • Garra Tico, J
  • Grauges, E
  • Martinelli, M
  • Palano, A
  • Pappagallo, M
  • Eigen, G
  • Stugu, B
  • Sun, L
  • Battaglia, M
  • Brown, DN
  • Hooberman, B
  • Kerth, LT
  • Kolomensky, YG
  • Lynch, G
  • Osipenkov, IL
  • Tanabe, T
  • Hawkes, CM
  • Watson, AT
  • Koch, H
  • Schroeder, T
  • Asgeirsson, DJ
  • Hearty, C
  • Mattison, TS
  • McKenna, JA
  • Khan, A
  • Randle-Conde, A
  • Blinov, VE
  • Buzykaev, AR
  • Druzhinin, VP
  • Golubev, VB
  • Onuchin, AP
  • Serednyakov, SI
  • Skovpen, YI
  • Solodov, EP
  • Todyshev, KY
  • Yushkov, AN
  • Bondioli, M
  • Curry, S
  • Kirkby, D
  • Lankford, AJ
  • Mandelkern, M
  • Martin, EC
  • Stoker, DP
  • Atmacan, H
  • Gary, JW
  • Liu, F
  • Long, O
  • Vitug, GM
  • Campagnari, C
  • Hong, TM
  • Kovalskyi, D
  • Richman, JD
  • Eisner, AM
  • Heusch, CA
  • Kroseberg, J
  • Lockman, WS
  • Martinez, AJ
  • Schalk, T
  • Schumm, BA
  • Seiden, A
  • Winstrom, LO
  • Cheng, CH
  • Doll, DA
  • Echenard, B
  • Hitlin, DG
  • Ongmongkolkul, P
  • Porter, FC
  • Rakitin, AY
  • Andreassen, R
  • Dubrovin, MS
  • Mancinelli, G
  • Meadows, BT
  • Sokoloff, MD
  • Bloom, PC
  • Ford, WT
  • Gaz, A
  • Hirschauer, JF
  • Nagel, M
  • Nauenberg, U
  • Smith, JG
  • Wagner, SR
  • Ayad, R
  • Toki, WH
  • Karbach, TM
  • Merkel, J
  • Petzold, A
  • Spaan, B
  • Wacker, K
  • Kobel, MJ
  • Schubert, KR
  • Schwierz, R
  • Bernard, D
  • et al.
Abstract

We report a direct measurement of D0-D̄0 mixing parameters through a time-dependent amplitude analysis of the Dalitz plots of D0→KS0π+π-and, for the first time, D0→KS0K+K-decays. The low-momentum pion πs+ in the decay D*+→D0πs+ identifies the flavor of the neutral D meson at its production. Using 468.5fb-1 of e+e-colliding-beam data recorded near √s=10.6GeV 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) ]×10-3, and y=[5.7±2.0(stat)±1.3(syst)±0. 7(model)]×10-3. 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. © 2010 The American Physical Society.

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