English

Hints for Enhanced b -> sg from Charm and Kaon Counting

High Energy Physics - Phenomenology 2007-05-23 v1

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 BR(Bbar -> X_{ccbars}) at the Upsilon (4S) imply BR(B -> Xnocharm}) \approx 12.4 \pm 5.6 %, (2) the Bbar} -> K- X and Bbar -> K+/K- X branching fractions are in excess of conventional Bbar -> Xc -> KX yields by about 16.9 \pm 5.6 % and 18 \pm 5.3 %, respectively. JETSET 7.4 was used to estimate kaon yields from ssbar popping in Bbar -> Xcubard decays. JETSET 7.4 Monte Carlos for BR(Bbar -> Xsg) \sim 15 % imply that the additional kaon production would lead to 1 \sigma 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.

Keywords

Cite

@article{arxiv.hep-ph/9701300,
  title  = {Hints for Enhanced b -> sg from Charm and Kaon Counting},
  author = {Alexander L. Kagan and Johan Rathsman},
  journal= {arXiv preprint arXiv:hep-ph/9701300},
  year   = {2007}
}

Comments

23 pages, Latex, 1 figure, 6 tables

R2 v1 2026-07-22T14:35:25.230Z