A Method to Measure $φ_1$ Using $\bar{B}^0 \to D h^0$ With Multibody $D$ Decay

Details A Method to Measure $φ_1$ Using $\bar{B}^0 \to D h^0$ With Multibody $D$ Decay A Method to Measure $φ_1$ Using $\bar{B}^0 \to D h^0$ With Multibody $D$ Decay

2005-03-17

arxiv.org/abs/hep-ph/0503174v2

Phys.Lett.B624:1-10,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 7 figures, 2 tables. See also talk presented by T.G. at CKM2005 (http://ckm2005.ucsd.edu/) Submitted to Physics Lett

Scientific paper

10.1016/j.physletb.2005.07.053

We describe a new method to measure the angle $\phi_1$ of the CKM Unitarity Triangle using amplitude analysis of the multibody decay of the neutral $D$ meson produced via $\bar{B} \to D h^0$ colour-suppressed decays. The method employs the interference between $D^0$ and $\bar{D}^0$ to directly extract the value of $2\phi_1$, and thus resolve the ambiguity between $2\phi_1$ and $\pi-2\phi_1$ in the measurement of $\sin(2\phi_1)$ using $\bar{B}^0 \to J/ \psi \ks$. We present a feasibility study of this method using Monte Carlo simulation.

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