Il Nuovo Cimento A Series 11

, Volume 109, Issue 6–7, pp 851–861 | Cite as

Beauty semi-leptonic branching ratios

  • M. Schmitt


Recent measurements of inclusive and exclusive semi-leptonic b branching ratios are reviewed. Model-independent analyses from ARGUS and CLEO confirm the value BR(b→ℓνX)=10.4%, while new analyses from ALEPH obtain higher values above 11%. The difference is not consistent with measured values of b hadron lifetime. New measurements of BR(B→D*ℓν) from CLEO and ALEPH are in good agreement. First measurements of B→D*πℓν branching ratios from OPAL, DELPHI, and ALEPH confirm indirect evidence for a large D** component in semi-leptonic B decays.


13.20.He - Decays of bottom mesons 


13.30.Ce - Leptonic and semileptonic decays 


01.30.Cc - Conference proceedings 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    Shipsey I.,Measurements of V cb, paper presented at paper presented at theVI International Symposium on Heavy-Flavour Physics, Pisa, June 6–10, 1995.Google Scholar
  2. [2]
    Grinstein B. et al., this issue, p. 863.Google Scholar
  3. [3]
    Bigi I. et al., Phys. Lett. B,323 (1994) 408.CrossRefADSGoogle Scholar
  4. [4]
    Bagan E., Ball P., Braun V. M. andGosdzinsky P.,Phys. Lett. B,342 (1995) 362;Ball P. et al., CERN-TH/95-65 (hep-ph/9503493).CrossRefADSGoogle Scholar
  5. [5]
    Patterson Ritchie J.,Weak and Rare Decays, CLNS 95/137.Google Scholar
  6. [6]
    Katayama N.,ICHEP94 (Ref. GLS0741), CLEO TALK 94-32.Google Scholar
  7. [7]
    DELPHICollaboration,Z. Phys. C,66 (1995) 323.CrossRefGoogle Scholar
  8. [8]
    ALEPHCollaboration,Phys. Lett. B,313 (1993) 535.CrossRefGoogle Scholar
  9. [9]
    ALEPHCollaboration, contribution toEPS-HEP95, Brussels, Ref. EPS0404.Google Scholar
  10. [10]
    L3Collaboration,Proceedings of ICHEP94, Glasgow, Vol.2, p. 1089.Google Scholar
  11. [11]
    ALEPHCollaboration,Phys. Lett. B,343 (1995) 444.CrossRefGoogle Scholar
  12. [12]
    ARGUSCollaboration,Phys. Lett. B,318 (1993) 397.CrossRefADSGoogle Scholar
  13. [13]
    CLEOCollaboration,ICHEP94 (Ref. GLS0741), CLEO CONF 94-6.Google Scholar
  14. [14]
    Sharma V.,Measurement of beauty lifetime, paper presented at theVI International Symposium on Heavy-Flavour Physics, Pisa, June 6–10, 1995.Google Scholar
  15. [15]
    Browder T. andHonscheid K.,Prog. Nucl. Part. Phys.,35 (1995) 81.CrossRefGoogle Scholar
  16. [16]
    Voloshin M. B. andShifman M. A.,Sov. J. Nucl. Phys.,47 (1998) 511.Google Scholar
  17. [17]
    CLEOCollaboration, CLNS 94/1285, CLEO 94-13; ALEPHCollaboration, CERN-PPE/95-094.Google Scholar
  18. [18]
    ALEPHCollaboration,Phys. Lett. B,345 (1995) 103; DELPHICollaboration, ICHEP94 (Ref. GLS0185); OPALCollaboration,Z. Phys. C,67 (1995) 57.CrossRefGoogle Scholar
  19. [19]
    Furtjes A., this issue, p. 641.Google Scholar

Copyright information

© Società Italiana di Fisica 1996

Authors and Affiliations

  1. 1.University of WisconsinUSA

Personalised recommendations