Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-11-19
Phys.Rev. D59 (1999) 114005
Physics
High Energy Physics
High Energy Physics - Phenomenology
25 pages, Latex, 4 figures included
Scientific paper
10.1103/PhysRevD.59.114005
CP violation from physics beyond the Standard Model is investigated in $B_{l4}$ decays: $B\to D\pi l\bar{\nu}_l$. The semileptonic $B$-meson decay to a $D$-meson with an emission of single pion is analyzed with heavy quark effective theory and chiral perturbation theory. In the decay process, we include various excited states as intermediate states decaying to the final hadrons, $D+\pi$. The CP violation is implemented in a model independent way, in which we extend leptonic current by including complex couplings of the scalar sector and those of the vector sector in extensions of the Standard Model. With these complex couplings, we calculate the CP-odd rate asymmetry and the optimal asymmetry. We find that the optimal asymmetry is sizable and can be detected at $1\sigma$ level with about $10^6$-$10^7$ $B$-meson pairs, for some reference values of new physics effects.
Kim Chang Sub
Lee Jake
Namgung Wuk
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