sin2phi1 with 45 Million BBbar Pairs at Belle
| dc.creator | Hazumi, Masashi | |
| dc.date | 2002-07-25 | |
| dc.date | 2002-07-31 | |
| dc.date.accessioned | 2026-07-07T03:35:26Z | |
| dc.date.available | 2026-07-07T03:35:26Z | |
| dc.description | We present an improved measurement of the standard model CP violation parameter sin2phi1 (also known as sin2beta) based on a sample of 45 x 10^6 BBbar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEK asymmetric-energy e^+e^- collider. One neutral B meson is reconstructed in a J/psi Ks, psi(2s) Ks, chi_c1 Ks, eta_c Ks, J/psi K*, or J/psi KL CP-eigenstate decay channel and the flavor of accompanying B meson is identified from its decay products. From the asymmetry in the distribution of the time intervals between the two B meson decay points, we obtain sin2phi1 = 0.82 +/- 0.12(stat) +/- 0.05(syst). | |
| dc.description | 8 pages, Talk presented at Flavor Physics and CP Violation (FPCP), Philadelphia, U.S.A., May 16-18, 2002 | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0207075 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0207075 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/37345 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | sin2phi1 with 45 Million BBbar Pairs at Belle | |
| dc.type | text |