Measurements of the CKM Angle {gamma}/{phi}3 at BABAR and BELLE
Journal Article
·
· AIP Conference Proceedings
- LLR, Ecole polytechnique - 91128 PALAISEAU Cedex (France)
We present recent measurements of the CP violating angle {gamma}/ {phi}3 ({gamma} notation will be used) performed by the BABAR and BELLE collaborations. Measurements with B{+-}{yields}D(*)0K(*){+-} decays of charged B mesons exploit the Gronau-London-Wyler (GLW), Atwood-Dunietz-Soni (ADS) and Giri-Grossman-Soffer-Zupan (GGSZ) methods. The GGSZ method provides the strongest constrain; BABAR, using 227x106 BB(bar sign) pairs, reports {gamma} = 67 deg. {+-} 28 deg. (stat.) {+-} 13 deg. (syst.) {+-} 11 deg. (Dalitz model) and BELLE measures, with 386x106 BB(bar sign) pairs, {gamma} = 53 deg. {sub -18}{sup +15} deg. (stat.) {+-} 3 deg. (syst.) {+-} 9 deg. (Dalitz model). Measurements with neutral B decays are based on time-dependent analyses of B0{yields}D(*)-{pi}+, D-{rho}+ decays. BABAR obtains |sin(2{beta}+{gamma})|>0.64(0.40) at 68(90)% CL using 232x106 BB-bar pairs and BELLE, with 386x106 BB(bar sign) pairs, reports vertical bar sin(2{beta}+{gamma}) vertical bar >0.44(0.13) at 68(95)% CL for D*{pi} and vertical bar sin(2{beta}+{gamma}) vertical bar >0.52(0.07) at 68(95)% CL for D{pi} . Searches for other decay modes useful for the {gamma} measurement are reported. BABAR observes the allowed B-bar0 {yields} D0K-bar*0 decay, but not the suppressed B-bar0 {yields} D-bar0K-bar*0 one. This translates to the limit on the ratio of the suppressed to allowed amplitudes rB < 0.4 at 90% CL.
- OSTI ID:
- 20895004
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 870; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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