Trapping Penguins with Entangled B Mesons

Abstract

The first direct observation of time-reversal (T) violation in the $B\bar{B}$ system has been reported by the BaBar collaboration, employing the method of Ba$\tilde{\mathrm{n}}$uls and Bernabéu. Given this, we generalize their analysis of the time-dependent T-violating asymmetry ($A_T$) to consider different choices of CP tags for which the dominant amplitudes have the same weak phase. As one application, we find that it is possible to measure departures from the universality of $\sin (2\beta )$ directly. If $\sin (2\beta )$ is universal, as in the Standard Model, the method permits the direct determination of penguin effects in these channels. Our method, although no longer a strict test of T, can yield tests of the $\sin (2\beta )$ universality, or, alternatively, of penguin effects, of much improved precision even with existing data sets.

11 pages, 2 figures; refs. added; reframed with expanded discussions; version to appear in PLB; Metadata abstract updated only

References in corpus (10)

• QCD and strongly coupled gauge theories: challenges and perspectives
• The Physics of the B Factories
• Observation of Time Reversal Violation in the B0 Meson System
• The Golden Modes B^0 -> J/psi K_{S,L} in the Era of Precision Flavour Physics
• Penguin contributions to CP phases in $B_{d,s}$ decays to charmonium
• Measurement of $CP$ violation in $B^0\to J/\psi K_S^0$ decays
• Search for Time-Dependent CPT Violation in Hadronic and Semileptonic B Decays
• Direct test of time reversal invariance violation in B mesons
• CP Asymmetries in B to f_0 K_S Decays
• T Violation and CPT Tests in Neutral-Meson Systems

Cited by in corpus (2)

• Experimental prospects for C, P, T, CP, and CPT tests
• Experimental Status of the CKM Matrix