0 v 1 1 5 Ja n 19 97 Hints for Enhanced b → sg from Charm and Kaon Counting
نویسندگان
چکیده
Previously, motivation for enhanced b → sg from new flavor physics has centered on discrepancies between theory and experiment. Here two experimental hints are considered: (1) updated measurements of the charm multiplicity and B(B → Xcc̄s) at the Υ(4S) imply B(B → Xno charm) ≈ 12.4 ± 5.6%, (2) the B → KX and B → K+/K−X branching fractions are in excess of conventional B → Xc → KX yields by about 16.9 ± 5.6% and 18± 5.3%, respectively. JETSET 7.4 was used to estimate kaon yields from ss̄ popping in B → Xcūd decays. JETSET 7.4 Monte Carlos for B(B → Xsg) ∼ 15% imply that the additional kaon production would lead to 1σ agreement with observed charged and neutral kaon yields. The Ks momentum spectrum would be consistent with recent CLEO bounds in the end point region. Search strategies for enhanced b → sg are discussed in light of large theoretical uncertainty in the standard model fast kaon background from b → s penguin operators.
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