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research article
First Measurement of Inclusive B -> X-s eta Decays
We report a first measurement of inclusive B -> X-s eta decays, where X-s is a charmless state with unit strangeness. The measurement is based on a pseudoinclusive reconstruction technique and uses a sample of 657 x 10(6)B (B) over bar pairs accumulated with the Belle detector at the KEKB e(+)e(-) collider. For M-X1 < 2.6 GeV/c(2), we measure a branching fraction of [26.1 +/- 3.0(stat)(-2.1)(+1.9)(syst)(-7.1)(+4.0)(model)] x 10(-5) and a direct CP asymmetry of A(CP) = 0.13 +/- 0.04(-0.03)(+0.02). Over half of the signal occurs in the range M-X2 > 1.8 GeV/c(2).
Type
research article
Web of Science ID
WOS:000283849300006
Authors
Nishimura, K.
•
Browder, T. E.
•
Adachi, I.
•
Aihara, H.
•
Arinstein, K.
•
Aushev, T.
•
Bakich, A. M.
•
Balagura, V.
•
Barberio, E.
•
Belous, K.
Publication date
2010
Published in
Volume
105
Issue
19
Article Number
191803
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
December 16, 2011
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