RATIOS OF B-MESON AND D-MESON DECAY CONSTANTS WITH HEAVY-QUARK SYMMETRY

Authors
GIRI AK MAHARANA L MOHANTA R
Citation
Ak. Giri et al., RATIOS OF B-MESON AND D-MESON DECAY CONSTANTS WITH HEAVY-QUARK SYMMETRY, Pramana, 46(6), 1996, pp. 411-416
Citations number
26
Categorie Soggetti
Physics
Journal title
Pramana → ACNP
ISSN journal
03044289
Volume
46
Issue
6
Year of publication
1996
Pages
411 - 416
Database
ISI
SICI code
0304-4289(1996)46:6<411:ROBADD>2.0.ZU;2-E
Abstract
SU(3) flavor symmetry allows the decay constants f(Ds) and f(Dd) as we ll as f(Bs) and f(Bd) to be equal. But due to SU(3) flavor symmetry br eaking the ratios f(Bs)/f(Bd) and f(Ds)/f(Dd) are deviated from unity. We have estimated these ratios in the heavy quark effective theory an d obtained f(Bs)/f(Bd) = 0.93, f(Ds)/f(Dd) = 0.94 and the double ratio (f(Bs)/f(Bd))/(f(Ds)/f(Dd)) = 0.99.