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 00:00:00 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, Vol. 82, Issue 7; Other Information: DOI: 10.1103/PhysRevD.82.073011; (c) 2010 American Institute of Physics; 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
DALITZ PLOT
ELECTRON-POSITRON COLLISIONS
KAONS MINUS
KAONS NEUTRAL SHORT-LIVED
KEK LINAC
MAXIMUM-LIKELIHOOD FIT
MIXING
PARTICLE DECAY
RESONANCE
TIME DEPENDENCE
ACCELERATORS
B MESONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
COLLISIONS
DECAY
DIAGRAMS
ELECTRON COLLISIONS
ELEMENTARY PARTICLES
HADRONS
INFORMATION
INVARIANCE PRINCIPLES
KAONS
KAONS NEUTRAL
LINEAR ACCELERATORS
MATHEMATICAL SOLUTIONS
MESONS
NUMERICAL SOLUTION
POSITRON COLLISIONS
PSEUDOSCALAR MESONS
SCATTERPLOTS
STRANGE MESONS
STRANGE PARTICLES