Improved measurement of time-dependent CP violation in B{sup 0}{yields}J/{psi}{pi}{sup 0} decays

Journal Article · Tue Apr 01 00:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.071101· OSTI ID:21249909

Lee, S E; Kim, S K; Lee, M J ^[1]; Miyabayashi, K; Hayashii, H; Kataoka, S U; Noguchi, S; Sekiya, A ^[2]; Aihara, H; Iwasaki, M ^[3]; Aushev, T ^[4]; Aziz, T ^[5]; Bakich, A M; McOnie, S; Varvell, K E ^[6]; Balagura, V; Chistov, R; Liventsev, D; Medvedeva, T; Mizuk, R ^[7]

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1. Seoul National University, Seoul (Korea, Republic of)
2. Nara Women's University, Nara (Japan)
3. Department of Physics, University of Tokyo, Tokyo (Japan)
4. Ecole Polytecnique Federale Lausanne, EPFL, Lausanne (Switzerland)
5. Tata Institute of Fundamental Research, Mumbai (India)
6. University of Sydney, Sydney, New South Wales (Australia)
7. Institute for Theoretical and Experimental Physics, Moscow (Russian Federation)

We report improved measurements of time-dependent CP violation parameters for B{sup 0}(B{sup 0}){yields}J/{psi}{pi}{sup 0} decay. This analysis is based on 535x10{sup 6} BB pairs accumulated at the {upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider. From the distribution of proper time intervals between the two B decays, we obtain the following CP violation parameters S{sub J/{psi}}{sub {pi}{sup 0}}=-0.65{+-}0.21(stat){+-}0.05(syst) and A{sub J/{psi}}{sub {pi}{sup 0}}=+0.08{+-}0.16(stat){+-}0.05(syst),which are consistent with standard model expectations.

• OSTI ID: 21249909
• Journal Information: Physical Review. D, Particles Fields, Vol. 77, Issue 7; Other Information: DOI: 10.1103/PhysRevD.77.071101; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
B NEUTRAL MESONS
CP INVARIANCE
DISTRIBUTION
ELECTRON-POSITRON COLLISIONS
ELECTRONS
PARTICLE DECAY
PIONS NEUTRAL
POSITRONS
RESONANCE
STANDARD MODEL
TIME DEPENDENCE