Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-04-18
Phys.Lett. B538 (2002) 327-334
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pages, revtex4. Minor changes. Version to appear in PLB
Scientific paper
In the standard model the CP asymmetries in $B\to \psi K_S$ and $B\to \psi K_L$ are equal in magnitude and opposite in sign to very good approximation. We compute the order $\epsilon_K$ corrections to each of these CP asymmetries and find that they give a deviation from $\sin 2\beta$ at the half percent level, which may eventually be measurable. However, the correction to $a_{CP}(B\to \psi K_S)+a_{CP}(B\to \psi K_L)$ due to $\epsilon_K$ is further suppressed. The dominant corrections to this sum, at the few times $10^{-3}$ level, come from the $B$ lifetime difference, and CP violation in $B- \bar B$ mixing and $B \to \psi K$ decay. New physics could induce a significant difference in the $\sin(\Delta m_B t)$ time dependence in the asymmetries if and only if the "wrong-flavor" amplitudes $B \to \psi \bar K$ or $\bar B \to \psi K$ are generated. A scale of new physics that lies well below the weak scale would be required. Potential scenarios are therefore highly constrained, and do not appear feasible. A direct test is proposed to set bounds on such effects.
Grossman Yuval
Kagan Alexander L.
Ligeti Zoltan
No associations
LandOfFree
Can the CP asymmetries in $B\to ψK_S$ and $B\to ψK_L$ differ? 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 Can the CP asymmetries in $B\to ψK_S$ and $B\to ψK_L$ differ?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Can the CP asymmetries in $B\to ψK_S$ and $B\to ψK_L$ differ? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-358183