Future Colliders

Research group

Research theme

Sub department

About

Observation of CP violation in the B0 meson system

Physical Review Letters 87:9 (2001)

Authors:

B Aubert, D Boutigny, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Palano, GP Chen, JC Chen, ND Qi, G Rong, P Wang, YS Zhu, G Eigen, PL Reinertsen, B Stugu, B Abbott, GS Abrams, AW Borgland, AB Breon, DN Brown, J Button-Shafer, RN Cahn, AR Clark, MS Gill, AV Gritsan, Y Groysman, RG Jacobsen, RW Kadel, J Kadyk, LT Kerth, S Kluth, YG Kolomensky, JF Kral, C LeClerc, ME Levi, T Liu, G Lynch, AB Meyer, M Momayezi, PJ Oddone, A Perazzo, M Pripstein, NA Roe, A Romosan, MT Ronan, VG Shelkov, AV Telnov, WA Wenzel, MS Zisman, PG Bright-Thomas, TJ Harrison, CM Hawkes, DJ Knowles, SW O'Neale, RC Penny, AT Watson, NK Watson, T Deppermann, K Goetzen, H Koch, J Krug, M Kunze, B Lewandowski, K Peters, H Schmuecker, M Steinke, JC Andress, NR Barlow, W Bhimji, N Chevalier, PJ Clark, WN Cottingham, N De Groot, N Dyce, B Foster, JD McFall, D Wallom, FF Wilson, K Abe, C Hearty, TS Mattison, JA McKenna, D Thiessen, S Jolly, AK McKemey, J Tinslay, VE Blinov, AD Bukin, DA Bukin, AR Buzykaev, VB Golubev, VN Ivanchenko, AA Korol, EA Kravchenko, AP Onuchin, AA Salnikov, SI Serednyakov

Abstract:

We present an updated measurement of time-dependent CP-violating asymmetries in neutral B decays with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. This result uses an additional sample of 纬(4S)decays collected in 2001, bringing the data available to 32 脳106 BB炉 We select events in which one neutral B meson is fully reconstructed in a final state containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2尾, is derived from the decay time distributions in such events. The result sin2尾=0.59 卤 0.14(stat)卤0.05(syst) establishes CP violation in the B0 meson system. We also determine |位|= 0.93卤0.09(stat)卤0.03(syst), consistent with no direct CP violation. 漏 2001 The American Physical Society.

A 51猎奇入口 of B0 -> J/psi K(*)0 pi+ pi- Decays with the Collider Detector at Fermilab

ArXiv hep-ex/0108022 (2001)

Search for New Heavy Particles in the WZ Final State in Proton Anti-Proton Collisions at Sqrt{s} = 1.8 TeV

ArXiv hep-ex/0108004 (2001)

Double Diffraction Dissociation at the Fermilab Tevatron Collider

ArXiv hep-ex/0107070 (2001)

Observation of Diffractive $J/蠄$ Production at the Fermilab Tevatron

ArXiv hep-ex/0107071 (2001)