Hints for Enhanced b - sg from Charm and Kaon Counting.pdf

a r X i v : h e p - p h / 9 7 0 1 3 0 0 v 1 1 5 J a n 1 9 9 7 Hints for Enhanced b → sg from Charm and Kaon Counting Alexander L. Kagan Department of Physics University of Cincinnati, Cincinnati, OH 45221 Johan Rathsman Stanford Linear Accelerator Center Stanford University, Stanford, California 94309 February 1, 2008 Abstract 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 → Xcc?s) at the Υ(4S) imply B(B → Xno charm) ≈ 12.4 ± 5.6%, (2) the B → K?X 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 ss? popping in B → Xcu?d 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. 1 Introduction Quark masses or Cabibbo-Kobayashi-Maskawa mixing angles arising from new in- teractions at the TeV scale are often directly correlated with large flavor changing chromomagnetic dipole moments since the chirality flip inherent in both sets of operators has a common origin [1, 2, 3]. Examples include radiatively induced quark masses via exchange of superpartners or vectorlike quarks [1], and dynam- ically generated quark masses in models with techniscalars [1] or enhanced four fermion interactions [2]. Another source for such correlations might be quark sub- structure [4, 5]. In the case of enhanced s → dg a model-independent analysis suggests that 20% to 30% of the K → ππ ?I = 1 2 amplitude could be