LargeCPphase inBs–B¯smixing and unparticle physics

Abstract

In this work we investigate the contribution to ${B}_{d,s}$ mixing from both scalar and vector unparticles in a number of scenarios. The emphasis of this work is to show the impact of the recently discovered $3\ensuremath{\sigma}$ evidence for new physics found in the $CP$ phase of ${B}_{s}$ mixing. Here we show that the inclusion of the $CP$ phase constraints for both ${B}_{d}$ and ${B}_{s}$ mixing improves the bounds set on the unparticle couplings by a factor of $2\ensuremath{\sim}4$, and one particular scenario of scalar unparticles is found to be excluded by the $3\ensuremath{\sigma}$ measurement of ${\ensuremath{\phi}}_{s}$.