From: B meson decays
Experiment
Lepton energy range
â„’ MathType@MTEF@5@5@+=feaagaart1ev2aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8bkY=wiFfYlOipiY=Hhbbf9v8qqaqFr0xc9vqpe0di9q8qqpG0dHiVcFbIOFHK8Feei0lXdar=Jb9qqFfeaYRXxe9vr0=vr0=LqpWqaaeaabiGaciaacaqabeaabeqacmaaaOqaamrtHrhAL1wy0L2yHvtyaeHbnfgDOvwBHrxAJfwnaGabciab=jrimbaa@35BA@ int (fb-1)
Δ ℬ MathType@MTEF@5@5@+=feaagaart1ev2aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8bkY=wiFfYlOipiY=Hhbbf9v8qqaqFr0xc9vqpe0di9q8qqpG0dHiVcFbIOFHK8Feei0lXdar=Jb9qqFfeaYRXxe9vr0=vr0=LqpWqaaeaabiGaciaacaqabeaabeqacmaaaOqaamrtHrhAL1wy0L2yHvtyaeHbnfgDOvwBHrxAJfwnaGabaiab=Xsicbaa@35C8@ (Xuℓ ν ¯ MathType@MTEF@5@5@+=feaagaart1ev2aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8bkY=wiFfYlOipiY=Hhbbf9v8qqaqFr0xc9vqpe0di9q8qqpG0dHiVcFbIOFHK8Feei0lXdar=Jb9qqFfeaYRXxe9vr0=vr0=LqpWqaaeaabiGaciaacaqabeaabeqacmaaaOqaaiqbe27aUzaaraaaaa@2CC7@ ℓ) (×104)
|V ub | (×103)
Ï’(4S)
cont.
CLEO [255]
2.6 GeV > Eâ„“ > 2.1 GeV
9.1
4.3
3.28 ± 0.23 ± 0.75
3.94 ± 0.46 − 0.33 + 0.37 MathType@MTEF@5@5@+=feaagaart1ev2aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8bkY=wiFfYlOipiY=Hhbbf9v8qqaqFr0xc9vqpe0di9q8qqpG0dHiVcFbIOFHK8Feei0lXdar=Jb9qqFfeaYRXxe9vr0=vr0=LqpWqaaeaabiGaciaacaqabeaabeqacmaaaOqaaiabiodaZiabc6caUiabiMda5iabisda0iabgglaXkabicdaWiabc6caUiabisda0iabiAda2maaDaaaleaacqGHsislcqaIWaamcqGGUaGlcqaIZaWmcqaIZaWmaeaacqGHRaWkcqaIWaamcqGGUaGlcqaIZaWmcqaI3aWnaaaaaa@3DED@
Belle [256]
2.6 GeV > Eâ„“ > 1.9 GeV
27
8.8
5.72 ± 0.41 ± 0.65
4.74 ± 0.44 − 0.30 + 0.35 MathType@MTEF@5@5@+=feaagaart1ev2aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8bkY=wiFfYlOipiY=Hhbbf9v8qqaqFr0xc9vqpe0di9q8qqpG0dHiVcFbIOFHK8Feei0lXdar=Jb9qqFfeaYRXxe9vr0=vr0=LqpWqaaeaabiGaciaacaqabeaabeqacmaaaOqaaiabisda0iabc6caUiabiEda3iabisda0iabgglaXkabicdaWiabc6caUiabisda0iabisda0maaDaaaleaacqGHsislcqaIWaamcqGGUaGlcqaIZaWmcqaIWaamaeaacqGHRaWkcqaIWaamcqGGUaGlcqaIZaWmcqaI1aqnaaaaaa@3DDD@
BaBar [257]
2.6 GeV > Eâ„“ > 2.0 GeV
80
9.5
4.29 ± 0.24 − 0.30 + 0.35 MathType@MTEF@5@5@+=feaagaart1ev2aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8bkY=wiFfYlOipiY=Hhbbf9v8qqaqFr0xc9vqpe0di9q8qqpG0dHiVcFbIOFHK8Feei0lXdar=Jb9qqFfeaYRXxe9vr0=vr0=LqpWqaaeaabiGaciaacaqabeaabeqacmaaaOqaaiabisda0iabc6caUiabikdaYiabiMda5iabgglaXkabicdaWiabc6caUiabikdaYiabisda0maaDaaaleaacqGHsislcqaIWaamcqGGUaGlcqaIZaWmcqaIWaamaeaacqGHRaWkcqaIWaamcqGGUaGlcqaIZaWmcqaI1aqnaaaaaa@3DD9@