[SLAC] [SLAC Pubs and Reports]

CP Asymmetries in B Decays with New Physics in Decay Amplitudes


We make a systematic analysis of the effects of new physics in the $B$ decay amplitudes on the $CP$ asymmetries in neutral $B$ decays. Although these are expected to be smaller than new physics effects on the mixing amplitude, they are easier to probe in some cases. The effects of new contributions to the mixing amplitude are felt universally across all decay modes, whereas the effects of new decay amplitudes could vary from mode to mode. In particular the prediction that the $CP$ asymmetries in the $B_d$ decay modes with $b\to c\bar c s$, $b \to c\bar c d$, $ b\to c \bar u d$ and $ b\to s \bar s s$ should all measure the same quantity ($\sin2\beta$ in the \sm) could be violated. Since the above \sm\ prediction is very precise, new decay amplitudes which are a few percent of the \sm\ amplitudes can be probed. Three examples of models where measurable effects are allowed are given: effective supersymmetry, models with enhanced chromomagnetic dipole operators, and supersymmetry without $R$ parity.

(Equations render on Windows, Mac OS, AIX, Linux, Solaris, and IRIX with the techexplorer plug-in.)

Full Text


Compressed PostScript

Not available for this document.


More Information

Full bibliographic data for this document, including its complete author list, is (or soon will be) available from SLAC's SPIRES-HEP Database.

Please report problems with this file to posting@slac.stanford.edu. The SLAC preprint inventory is provided by the SLAC Technical Publications Department.
Page generated 04 Apr 2001 @ 15:11 PDT by htmlme.pl