TY - JOUR
T1 - Evading the CKM hierarchy
T2 - Intrinsic charm in B decays
AU - Brodsky, S. J.
AU - Gardner, S.
PY - 2002
Y1 - 2002
N2 - We show that the presence of intrinsic charm in the hadrons' light-cone wave functions, even at a few percent level, provides new, competitive decay mechanisms for B decays which are nominally CKM suppressed. For example, the weak decays of the B-meson to two-body exclusive states consisting of strange plus light hadrons, such as B→πK, are expected to be dominated by penguin contributions since the tree-level b →suū decay is CKM suppressed. However, higher Fock states in the B wave function containing charm quark pairs can mediate the decay via a CKM-favored b→scc̄ tree-level transition. Such intrinsic charm contributions can be phenomenologically significant. Since they mimic the amplitude structure of "charming" penguin contributions, the latter need not be penguin contributions at all.
AB - We show that the presence of intrinsic charm in the hadrons' light-cone wave functions, even at a few percent level, provides new, competitive decay mechanisms for B decays which are nominally CKM suppressed. For example, the weak decays of the B-meson to two-body exclusive states consisting of strange plus light hadrons, such as B→πK, are expected to be dominated by penguin contributions since the tree-level b →suū decay is CKM suppressed. However, higher Fock states in the B wave function containing charm quark pairs can mediate the decay via a CKM-favored b→scc̄ tree-level transition. Such intrinsic charm contributions can be phenomenologically significant. Since they mimic the amplitude structure of "charming" penguin contributions, the latter need not be penguin contributions at all.
UR - http://www.scopus.com/inward/record.url?scp=0036496993&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036496993&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.65.054016
DO - 10.1103/PhysRevD.65.054016
M3 - Article
AN - SCOPUS:0036496993
SN - 0556-2821
VL - 65
JO - Physical review D
JF - Physical review D
IS - 5
M1 - 054016
ER -