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Time-dependent dalitz plot analysis of B0→ K0Sπ+π-

  • Author(s): Aubert, B
  • Bona, M
  • Boutigny, D
  • Karyotakis, Y
  • Lees, JP
  • Poireau, V
  • Prudent, X
  • Tisserand, V
  • Zghiche, A
  • Garra Tico, J
  • Grauges, E
  • Lopez, L
  • Palano, A
  • Pappagallo, M
  • Eigen, G
  • Stugu, B
  • Sun, L
  • Abrams, GS
  • Battaglia, M
  • Brown, DN
  • Button-Shafer, J
  • Cahn, RN
  • Groysman, Y
  • Jacobsen, RG
  • Kadyk, JA
  • Kerth, LT
  • Kolomensky, YG
  • Kukartsev, G
  • Lopes Pegna, D
  • Lynch, G
  • Mir, LM
  • Orimoto, TJ
  • Osipenkov, IL
  • Ronan, MT
  • Tackmann, K
  • Tanabe, T
  • Wenzel, WA
  • Del Amo Sanchez, P
  • Hawkes, CM
  • Watson, AT
  • Koch, H
  • Schroeder, T
  • Walker, D
  • Asgeirsson, DJ
  • Cuhadar-Donszelmann, T
  • Fulsom, BG
  • Hearty, C
  • Mattison, TS
  • McKenna, JA
  • Khan, A
  • Saleem, M
  • Teodorescu, L
  • Blinov, VE
  • Bukin, AD
  • Druzhinin, VP
  • Golubev, VB
  • Onuchin, AP
  • Serednyakov, SI
  • Skovpen, YI
  • Solodov, EP
  • Todyshev, KY
  • Bondioli, M
  • Curry, S
  • Eschrich, I
  • Kirkby, D
  • Lankford, AJ
  • Lund, P
  • Mandelkern, M
  • Martin, EC
  • Stoker, DP
  • Abachi, S
  • Buchanan, C
  • Foulkes, SD
  • Gary, JW
  • Liu, F
  • Long, O
  • Shen, BC
  • Vitug, GM
  • Zhang, L
  • Paar, HP
  • Rahatlou, S
  • Sharma, V
  • Berryhill, JW
  • Campagnari, C
  • Cunha, A
  • Dahmes, B
  • Hong, TM
  • Kovalskyi, D
  • Richman, JD
  • Beck, TW
  • Eisner, AM
  • Flacco, CJ
  • Heusch, CA
  • Kroseberg, J
  • Lockman, WS
  • Schalk, T
  • Schumm, BA
  • Seiden, A
  • Wilso, MG
  • Winstrom, LO
  • et al.
Creative Commons Attribution 4.0 International Public License
Abstract

We perform a time-dependent Dalitz plot analysis of B0 → K0 S π+π- in order to extract the CP violation parameters of f0(980)K0 S and ρ0(770)K0 S and direct CP-asymmetries of Kz.ast;+(892)π-. The results are obtained from a data sample of (383 ± 3) × 106 BB decays, collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. The measured values of 2βeff in B0 decays to f0(980)K0S and ρ0(770)K0 S are (89+22-20 ± 5 ±8) and (37+19 -17 ± 5 ±6), respectively, where the first quoted uncertainty is statistical, the second is systematic and the third is Dalitz plot signal model uncertainty. We measure the significance of 2βeff (f0(980)K0S) 6= 0 to be 4.3 σ. In decays to Kz.ast;(892)π we find ACP = -0.18 ± 0.10 ± 0.03 ± 0.03. The measured phase difference between the decay amplitudes of B0 → Kz.ast;+(892)π- and B0 → Kz.ast;-(892)π+ is (-164 ± 24 ± 12 ± 15). All results are preliminary.

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