Measurements Of Branching Fractions And Direct Cp Asymmetries In Pi Pi0 K Pi0 And K0 Pi0 B Decays
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From Quarks To Black Holes: Progress In Understanding The Logic Of Nature - Proceedings Of The International School Of Subnuclear Physics
Author: Antonino Zichichi
language: en
Publisher: World Scientific
Release Date: 2005-06-16
This volume is a unique report on the frontiers of subnuclear physics presented by global specialists in a clear and rigorous style.The question of Lattice QCD is presented by R D Kenway, and that of Quark-Gluon Plasma Physics by F Karsch. Quantum Field theory is discussed by R G Dijkgraff, and the status of Local Supersymmetry by M J Duff. Detailed analysis of Supersymmetry in Nuclei is made by F Iachello, and that of Inflation, Dark Matter and Dark Energy by E W Kolb. Compactified dimensions are outlined by I Antoniadis, Horizons in the quantization of the gravitational force by Nobel Laureate G 't Hooft, as also are Neutrino Oscillations by G Fogli and Fundamental Constants by H Fritzsch. The experimental data from BNL and Babar are presented by T W Ludlum and M A Giorgi, those from Fermilab and Hera by Parke and G Wolf. The status at CERN is given by L Maiani for the LHC and by W-D Schlatter for the non-LHC experiments. Highlights from Gran Sasso are presented by A Bettini. This volume also contains reports by a selected group of “new talents” on various topics in the field of subnuclear physics.The proceedings have been selected for coverage in:• Index to Scientific & Technical Proceedings® (ISTP® / ISI Proceedings)• Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings)• CC Proceedings — Engineering & Physical Sciences
MEASUREMENTS OF BRANCHING FRACTIONS AND DIRECT CP ASYMMETRIES IN PI+ PI0, K+ PI0 AND K0 PI0 B DECAYS.
The authors present preliminary results of the analyses of B[sup+][yields] h[sup+][pi][sup 0] (with H[sup+]=[pi][sup+], K[sup+]) and B[sup 0][yields] K[sup 0][pi][sup 0] decays from a sample of approximately 88 million b[bar B] pairs collected by the BaBar detector at the PEP-II asymmetric-energy B Factory at SLAC. They measure the[pi][sup+][pi][sup 0] branching fraction and they obtain[Beta](B[sup+][yields][pi][sup+][pi][sup 0])= (5.5[sub -0.9][sup+1.0][+-] 0.6) x 10[sup -6] with a significance of 7.7[sigma] including systematic uncertainties. The measure the K[sup+][pi][sup 0] and K[sup 0][pi][sup 0] branching fractions to be[Beta](B[sup+][yields] K[sup+][pi][sup 0])= (12.8[sub -1.1][sup+1.2][+-] 1.0) x 10[sup -6] and[Beta](B[sup 0][yields] K[sup 0][pi][sup 0])= (10.4[+-] 1.5[+-] 0.8) x 10[sup -6]. At the same time, the direct CP-violating asymmetries are investigated and they find[Alpha][sub[pi][sup+][pi][sup 0]]= -0.03[sub -0.17][sup+0.18][+-] 0.02, [Alpha][sub K[sup+][pi][sup 0]]= -0.09[+-] 0.09[+-] 0.01and[Alpha][sub K[sup 0][pi][sup 0]]= 0.03[+-] 0.36[+-] 0.09, where the errors are statistical and systematic, respectively.
Measurement of CP Asymmetries and Branching Fractions in B0 -] Pi+ Pi-, B0 -] K+ Pi-, B0 -] Pi0 Pi0, B0 -] K0 Pi0 and Isospin Analysis of B -] Pi Pi Decays
The authors present preliminary results of improved measurements of the CP-violating asymmetries and branching fractions in the decays B° →??−, B° → K+?−, B° →?°?°, and B° → K°?°. This update includes all data taken at the?(4S) resonance by the BABAR experiment at the asymmetric PEP-II B-meson factory at SLAC, corresponding to 467 ± 5 million B{bar B} pairs. They find S{sub??} = -0.68 ± 0.10 ± 0.03, C{sub??} = -0.25 ± 0.08 ± 0.02,?{sub K{sub?}} = -0.107 ± 0.016{sub -0.004}, {sup +0.006}, C{sub?°?°} = -0.43 ± 0.26 ± 0.05,?(B° →?°?°) = (1.83 ± 0.21 ± 0.13) x 10−6,?(B° → K°?°) = (10.1 ± 0.6 ± 0.4) x 10−6, where the first error is statistical and the second is systematic. They observe CP violation with a significance of 6.7? in B° → {pi}− and 6.1? in B° → K+{pi}−. Constraints on the Unitarity Triangle angle? are determined from the isospin relation between all B → {pi}{pi} rates and asymmetries.