Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-03-31
Int.J.Mod.Phys.A26:1273-1294,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
28 pages, 4 figures. References and discussions added. To appear in IJMPA
Scientific paper
10.1142/S0217751X11051573
Motivated by the measured large branching ratio of $\bar{B}^{0}\to\pi^0\pi^0$ (the so-called "$\pi\pi$" puzzle), we investigate the effects of a family non-universal $Z^{\prime}$ model on the tree-dominated $B\to\pi\pi$ decays. We find that the $Z^{\prime}$ coupling parameter $\zeta_{d}^{LR}\sim0.05$ with a nontrivial new weak phase $\phi_d^L\sim-50^{\circ}$, which is relevant to the $Z^{\prime}$ contributions to the QCD penguin sector $\triangle C_5$, is needed to reconcile the observed discrepancy. Combined with the recent fitting results from $B\to\pi K$, $\pi K^{\ast}$ and $\rho K$ decays, the $Z^{\prime}$ parameter spaces are severely reduced but still not excluded entirely, implying that both the "$\pi\pi$" and "$\pi K$" puzzles could be accommodated simultaneously within such a family non-universal $Z^{\prime}$ model.
Chang Qin
Li Xin-Qiang
Yang Ya-Dong
No associations
LandOfFree
The effects of a family non-universal Z-prime boson on B--->pipi decays does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The effects of a family non-universal Z-prime boson on B--->pipi decays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The effects of a family non-universal Z-prime boson on B--->pipi decays will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-580036