Time-Dependent CP Violation Effects in Partially Reconstructed $B^0\to D^{\ast }\pi$ Decays

Abstract

We report measurements of time-dependent decay rates for $B^0\to D^{\ast \mp }{\pi }^{\pm }$ decays and extraction of CP violation parameters related to ${\varphi }_3$. We use a partial reconstruction technique, whereby signal events are identified using information only from the primary pion and the charged pion from the decay of the $D^{\ast \mp }$. The analysis uses $140{\mathrm{fb}}^{-1}$ of data accumulated at the ${\rm Y}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider. We measure the CP violation parameters $S^{+}=0.035\pm 0.041(\mathrm{stat})\pm 0.018(\mathrm{syst})$ and $S^{-}=0.025\pm 0.041(\mathrm{stat})\pm 0.018(\mathrm{syst})$.

15 pages, 5 figures. To appear in Physics Letters B

References in corpus (2)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Improved Measurement of CP-Violation Parameters sin(2phi1) and |lambda|, B Meson Lifetimes, and B0-B0bar Mixing Parameter Delta m_d

Cited by in corpus (7)

• The 2004 UTfit Collaboration Report on the Status of the Unitarity Triangle in the Standard Model
• Measurements of CP Violation in $B^0\to D^{\ast -}{\pi }^{+}$ and $B^0\to D^{-}{\pi }^{+}$ Decays
• CP violation and limits on New Physics including recent $B_s$ measurements
• Measurements of time-dependent CP asymmetries in $B\to D^{\ast \mp }{\pi }^{\pm }$ decays using a partial reconstruction technique
• Search for the Rare Decays B0 -> Ds(*)+ a0(2)-
• Nondecoupling of Heavy Fermions and a Special Yukawa Texture
• Improved measurement of (2 beta+gamma)