Publication View

Determination of $|V_{ub}|$ from the measurement of the inclusive charmless semileptonic branching ratio of b hadrons (1998)

Abstract
From a study of the kinematic properties of the final state produced in the semileptonic decays b-->X l nu, the inclusive charmless semileptonic branching ratio of b hadrons is measured. With a sam ple of 3.6 million hadronic Z decays recorded between 1992 and 1995 with the ALEPH detector at LEP, the value Br(b-->X_u l nu) is determined to be (1.73 +- 0.55_stat +- 0.55_syst)*10^{-3}, where X_u represents any charmless hadronic state and b is a mixture of b hadrons weighted by their production rates. This measurement yields the result |V_ub|^2= (18.68 +- 5.94_stat +- 5.94_syst +- 1 .45_HQE)*10^{-6}, where the last error comes from the conversion of the branching ratio to the CKM matrix element squared.

Publication details
Download http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=ep-98-067
http://cdsweb.cern.ch/record/355437/files/ep-98-067.pdf
http://cdsweb.cern.ch/record/355437/files/ep-98-067.ps.gz
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_01.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_02.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_03.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_04.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_05.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_06.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_07.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_08.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_09.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_10.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_11.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_12.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_13.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_14.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_15.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_16.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_17.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_18.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_19.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_20.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_21.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_22.eps
http://cdsweb.cern.ch/record/355437/files/ep-98-067.fig_23.eps
Repository CERN Document Server (Switzerland)
Keywords Particle Physics - Experimental Results
Language eng