Journal
PHYSICAL REVIEW LETTERS
Volume 105, Issue 19, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.191803
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Funding
- MEXT
- JSPS
- Nagoya's TLPRC (Japan)
- ARC
- DIISR (Australia)
- NSFC (China)
- MSMT (Czechia)
- DST (India)
- MEST
- NRF
- NSDC of KISTI (Korea)
- MNiSW (Poland)
- MES
- RFAAE (Russia)
- ARRS (Slovenia)
- SNSF (Switzerland)
- NSC
- MOE (Taiwan)
- DOE (USA)
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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).
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