Measurement of CP violating asymmetries in B{sup 0{yields}}K{sup +}K{sup -}K{sub S}{sup 0} decays with a time-dependent Dalitz approach

Journal Article · Fri Oct 01 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.073011· OSTI ID:21421352

Nakahama, Y; Aihara, H; Iwasaki, M ^[1]; Sumisawa, K; Haba, J; Hazumi, M; Higuchi, T; Itoh, R; Iwasaki, Y; Katayama, N; Kichimi, H; Krokovny, P; Nakao, M; Nishida, S; Nozaki, T; Ozaki, H; Sakai, Y; Trabelsi, K; Uehara, S; Uno, S ^[2]

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1. Department of Physics, University of Tokyo, Tokyo (Japan)
2. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)

We report a measurement of CP violating asymmetries in B{sup 0}(B{sup 0}){yields}K{sup +}K{sup -}K{sub S}{sup 0} decays with a time-dependent Dalitz approach. This analysis is based on a data sample of 657x10{sup 6} BB pairs accumulated at the {Upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider. As the result of an unbinned maximum likelihood fit to the selected candidates, the mixing-induced and direct CP violation parameters {phi}{sub 1}{sup eff} and A{sub CP} are obtained for B{sup 0{yields}{phi}}(1020)K{sub S}{sup 0}, B{sup 0{yields}}f{sub 0}(980)K{sub S}{sup 0}, and other B{sup 0{yields}}K{sup +}K{sup -}K{sub S}{sup 0} decays. We find four solutions that describe the data. There are {phi}{sub 1}{sup eff}(B{sup 0{yields}{phi}}(1020)K{sub S}{sup 0})=(32.2{+-}9.0{+-}2.6{+-}1.4) deg.; {phi}{sub 1}{sup eff}(B{sup 0{yields}{phi}}(1020)K{sub S}{sup 0})=(26.2{+-}8.8{+-}2.7{+-}1.2) deg.; {phi}{sub 1}{sup eff}(B{sup 0{yields}{phi}}(1020)K{sub S}{sup 0})=(27.3{+-}8.6{+-}2.8{+-}1.3) deg.; and {phi}{sub 1}{sup eff}(B{sup 0{yields}{phi}}(1020)K{sub S}{sup 0})=(24.3{+-}8.0{+-}2.9{+-}5.2) deg. The values for the CP violating phase in B{sup 0{yields}{phi}}(1020)K{sub S}{sup 0} are similar, but other properties of the Dalitz plot are quite different for the four solutions. These four solutions have consistent {phi}{sub 1}{sup eff} values for all three B-meson decay channels and none of them deviates significantly from the values measured in B{yields}(cc)K{sup 0} decays with the currently available statistics. In addition, we find no significant direct CP violation.

• OSTI ID: 21421352
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 82; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ASYMMETRY
B MESONS
B NEUTRAL MESONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
COLLISIONS
CP INVARIANCE
DALITZ PLOT
DECAY
DIAGRAMS
ELECTRON COLLISIONS
ELECTRON-POSITRON COLLISIONS
ELEMENTARY PARTICLES
HADRONS
INFORMATION
INVARIANCE PRINCIPLES
KAONS
KAONS MINUS
KAONS NEUTRAL
KAONS NEUTRAL SHORT-LIVED
KEK LINAC
LINEAR ACCELERATORS
MATHEMATICAL SOLUTIONS
MAXIMUM-LIKELIHOOD FIT
MESONS
MIXING
NUMERICAL SOLUTION
PARTICLE DECAY
POSITRON COLLISIONS
PSEUDOSCALAR MESONS
RESONANCE
SCATTERPLOTS
STRANGE MESONS
STRANGE PARTICLES
TIME DEPENDENCE