Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-04-18
Phys.Rev.D52:6374-6382,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages, 3 figures, LaTeX file. The full postscript manuscript is available by anonymous ftp at ftp://lpsvsh.lps.umontreal.
Scientific paper
10.1103/PhysRevD.52.6374
We discuss the role of electroweak penguins in $B$ decays to two light pseudoscalar mesons. We confirm that the extraction of the weak phase $\alpha$ through the isospin analysis involving $B\to\pi\pi$ decays is largely unaffected by such operators. However, the methods proposed to obtain weak and strong phases by relating $B\to\pi\pi$, $B\to\pi K$ and $B\to KK$ decays through flavor SU(3) will be invalidated if electroweak penguins are large. We show that, although the introduction of electroweak penguin contributions introduces no new amplitudes of flavor SU(3), there are a number of ways to experimentally measure the size of such effects. Finally, using SU(3) amplitude relations we present a new way of measuring the weak angle $\gamma$ which holds even in the presence of electroweak penguins.
Gronau Michael
Hernandez Oscar F.
London David
Rosner Jonathan L.
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