Measurement of the angle $\phi_1$($\beta$) and B$\overline B$ mixing: Recent results from BaBar and Belle)

Abe, Kazuo

Report/Contribution to a conference proceedings

PUBDB-2016-03515

Measurement of the angle $\phi_1$($\beta$) and B$\overline B$ mixing: Recent results from BaBar and Belle)

Abe, K. (Corresponding author)

2003

23rd International Conference on Physics in Collision, PIC 2003, Zeuthen, Germany, 26 Jun 2003 - 28 Jun 2003 105-116 (2003)

Report No.: PIC-2003-FRAT01; hep-ex/0308072

Abstract: Recent results from BaBar and Belle experiments on $B \bar B$ mixing and $\sin 2\phi_1$ are presented. Accuracy of $\Delta m_d$ measurements has reached 1.2%. Higher order effects within the Standard Model or possible new physics effect that might appear in the $B \bar B$ mixing through non-zero $\Delta \Gamma/\Gamma$, CP violation, or $CPT$ violation have been explored. The BaBar and Belle results on $\sin 2\phi_1$ from the $b \to c \bar{c} s$ modes are in good agreement with each other and a combined result with an accuracy of 8% is in good agreement with a global CKM fit. A simple average of the $\sin 2\phi_1$ values that were measured in the penguin-loop dominated decay modes, $\phi K_S$, $\eta^{\prime} K_S$, and $K^+ K^- K_S$, shows about 2.5$\sigma$ deviation from the Standard Model.

Keyword(s): talk: Zeuthen 2003/06/26 ; electron positron: colliding beams ; electron positron: annihilation ; Upsilon(10570): electroproduction ; B: pair production ; B0 anti-B0: mixing ; B0: mass difference ; CKM matrix: unitarity ; B0: hadronic decay ; charmonium ; experimental results ; BaBar ; SLAC PEP Stor ; BELLE ; KEK TRISTAN Stor ; beauty --> 2charm strangeness ; B --> quarkonium strange meson ; B --> J/psi(3100) pi ; B --> 2charmed meson ; B --> eta(958) K0(S) ; B --> K0(S) K+ K- ; approx. 10.6 GeV-cms