Rare B Decays with eta' in the Final State
Date Issued
2005
Date
2005
Author(s)
Schuemann, Jan
DOI
en-US
Abstract
We present the results of the searches for two body hadronic B meson decays with an eta'
meson in the final state. We observe the decay B->eta' D0 and report the first observation of B->eta' D*0, using 140/fb of data collected at the Upsilon(4S) resonance with the Belle detector
at the KEKB asymmetric energy e+e⣵76; collider. We find the branching fractions to be:
BF(B->D0 eta') = [1.14+-0.20(stat.)+0.10-0.13(syst.)] x 10^-4,
BF(B->D*0 eta') = [1.21+-0.34(stat.)+-0.22(syst.)] x 10^-4,
with significances including systematic uncertainty of 8.9 and 5.3 standard deviations, respectively.
Additionally, we report the results for the charmless decays B-> eta' h, with h = K+, K_S and Pi+, using a data set of 350/fb collected with the Belle detector. We find:
BF(B->eta' K+) = [6.86+-0.36(stat.)+-0.21(syst.)] x 10^-5,
BF(B->eta' K_S) = [5.66+0.36-0.35(stat.)+0.33-0.32(syst.)] x 10^-5,
BF(B->eta' Pi+) = [1.73+0.69-0.63(stat.)+0.11-0.10(syst.)] x 10^-6,
where the decay including a pion has a significance of 3 sigma.
For the charged charmless decays, we search for direct CP violation and find:
ACP(B->eta' K+) = 0.029+-0.028(stat.)+0.021(syst.)] x 10^-6,
ACP(B->eta' Pi+) = 0.16+0.39-0.38(stat.)+0.02-0.06(syst.)] x 10^-6.
meson in the final state. We observe the decay B->eta' D0 and report the first observation of B->eta' D*0, using 140/fb of data collected at the Upsilon(4S) resonance with the Belle detector
at the KEKB asymmetric energy e+e⣵76; collider. We find the branching fractions to be:
BF(B->D0 eta') = [1.14+-0.20(stat.)+0.10-0.13(syst.)] x 10^-4,
BF(B->D*0 eta') = [1.21+-0.34(stat.)+-0.22(syst.)] x 10^-4,
with significances including systematic uncertainty of 8.9 and 5.3 standard deviations, respectively.
Additionally, we report the results for the charmless decays B-> eta' h, with h = K+, K_S and Pi+, using a data set of 350/fb collected with the Belle detector. We find:
BF(B->eta' K+) = [6.86+-0.36(stat.)+-0.21(syst.)] x 10^-5,
BF(B->eta' K_S) = [5.66+0.36-0.35(stat.)+0.33-0.32(syst.)] x 10^-5,
BF(B->eta' Pi+) = [1.73+0.69-0.63(stat.)+0.11-0.10(syst.)] x 10^-6,
where the decay including a pion has a significance of 3 sigma.
For the charged charmless decays, we search for direct CP violation and find:
ACP(B->eta' K+) = 0.029+-0.028(stat.)+0.021(syst.)] x 10^-6,
ACP(B->eta' Pi+) = 0.16+0.39-0.38(stat.)+0.02-0.06(syst.)] x 10^-6.
Subjects
電荷宇稱破壞
hig-energy-physics
direct-CP-violation
Type
thesis
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