Nishida, S;
Abe, K;
Abe, K;
Abe, T;
Aihara, H;
Asano, Y;
Aushev, T;
... Belle Collaboration; + view all
(2004)
Measurement of the CP asymmetry in B -> X-s gamma.
PHYS REV LETT
, 93
(3)
, Article 031803. 10.1103/PhysRevLett.93.031803.
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Abstract
Direct CP violation in the b-->sgamma process is a sensitive probe of physics beyond the standard model. We report a measurement of the CP asymmetry in B-->X(s)gamma, where the hadronic recoil system X-s is reconstructed using a pseudoreconstruction technique. In this approach there is negligible contamination from b-->dgamma decays, which are expected to have a much larger CP asymmetry. We find A(CP)=0.002+/-0.050(stat)+/-0.030(syst) for B-->X(s)gamma events having recoil mass smaller than 2.1 GeV/c(2). The analysis is based on a data sample of 140 fb(-1) recorded at the Y(4S) resonance with the Belle detector at the KEKB e(+)e(-) storage ring.
| Type: | Article |
|---|---|
| Title: | Measurement of the CP asymmetry in B -> X-s gamma |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.93.031803 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.93.031803 |
| Language: | English |
| Additional information: | The American Physical Society |
| Keywords: | BELLE DETECTOR, DECAYS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1308428 |
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