Measurement of CP Asymmetry in a Time-Dependent Dalitz Analysis of B{sup 0}{yields}({rho}{pi}){sup 0} and a Constraint on the Quark Mixing Matrix Angle {phi}{sub 2}

Journal Article · Fri Jun 01 00:00:00 EDT 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.221602· OSTI ID:20951440

Kusaka, A; Aihara, H; Hastings, N C; Ishikawa, A; Iwasaki, M; Kakuno, H ^[1]; Wang, C C; Chang, P; Chao, Y; Chen, K -F; Hou, W -S; Hsiung, Y B; Lin, S -W; Wang, M -Z ^[2]; Ishino, H; Khan, H R; Watanabe, Y ^[3]; Abe, K; Adachi, I; Dragic, J ^[4]

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1. Department of Physics, University of Tokyo, Tokyo (Japan)
2. Department of Physics, National Taiwan University, Taipei (China)
3. Tokyo Institute of Technology, Tokyo (Japan)
4. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)

We present a measurement of CP asymmetry using a time-dependent Dalitz plot analysis of B{sup 0}{yields}{pi}{sup +}{pi}{sup -}{pi}{sup 0} decays based on a 414 fb{sup -1} data sample containing 449x10{sup 6}BB pairs. The data was collected on the {upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric energy e{sup +}e{sup -} collider. Combining our analysis with information on charged B decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the CKM angle {phi}{sub 2}, 68 deg. <{phi}{sub 2}<95 deg. as the 68.3% confidence interval for the {phi}{sub 2} solution consistent with the standard model (SM). A large SM-disfavored region also remains.

• OSTI ID: 20951440
• Journal Information: Physical Review Letters, Vol. 98, Issue 22; Other Information: DOI: 10.1103/PhysRevLett.98.221602; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
B NEUTRAL MESONS
CP INVARIANCE
DALITZ PLOT
ISOSPIN
MATHEMATICAL SOLUTIONS
PARTICLE DECAY
PARTICLE PRODUCTION
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
QUARKS
RESONANCE
STANDARD MODEL
TIME DEPENDENCE