DMCA
Inclusive Search for the Charmless Radiative Decay of the
BibTeX
@MISC{On_inclusivesearch,
author = {Quark Collaborati On and L Collaboration},
title = {Inclusive Search for the Charmless Radiative Decay of the},
year = {}
}
Share
 |
 |
 |
 |
||
OpenURL
Abstract
We report on the search for the electromagnetic penguin decay b ! sfl at p s m Z . We find no evidence for a signal and place an upper limit on the decay rate Br(b ! sfl) ! 1:2 \Theta 10 \Gamma3 at 90% C.L. (Submitted to Physics Letters B) Introduction The electromagnetic penguin b decay b ! sfl[1] is a flavor changing neutral current transition induced at leading order by one-loop diagrams with a W boson propagator and u; c; t quarks in the loop. Within the Standard Model[2], the inclusive branching ratio b ! sfl is expected to be Br(b ! sfl) = (2:56 \Gamma 3:94) \Theta 10 \Gamma4 for m t in the range 90--200 GeV[3]. Electromagnetic penguin decays offer a unique window to probe new hypotheses[4, 5] beyond the Standard Model. In particular, Two Higgs Doublets[6] theories contain new diagrams with a charged Higgs boson that add constructively to the W boson loop diagram. The dominant contribution of the t- quark loop make the b ! sfl transition particularly sensitive to the ...
Keyphrases
charmless radiative decay inclusive search electromagnetic penguin decay sfl standard model upper limit quark loop neutral current transition sfl transition physic letter higgs doublet dominant contribution one-loop diagram unique window higgs boson new diagram boson loop diagram new hypothesis decay rate br inclusive branching ratio sfl boson propagator electromagnetic penguin decay
