Measurement of the CP Asymmetry in B -> X_s gamma
| dc.creator | Nishida, S. | |
| dc.date | 2003-08-15 | |
| dc.date | 2004-07-22 | |
| dc.date.accessioned | 2026-07-07T12:02:04Z | |
| dc.date.available | 2026-07-07T12:02:04Z | |
| dc.description | 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 Xs is reconstructed using a pseudo-reconstruction technique. In this approach there is negligible contamination from b->dgamma decays, which are expected to have a much larger CP asymmetry. We find ACP = 0.002 +- 0.050(stat.) +- 0.030(syst.) for B -> Xs gamma events having recoil mass smaller than 2.1 GeV/c^2. The analysis is based on a data sample of 140 /fb recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB e+e- storage ring. | |
| dc.description | published version in PRL. (9 pages, 2 postscript figures) | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0308038 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0308038 | |
| dc.identifier | Phys.Rev.Lett.93:031803,2004 | |
| dc.identifier | doi:10.1103/PhysRevLett.93.031803 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/207309 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Measurement of the CP Asymmetry in B -> X_s gamma | |
| dc.type | text |