Precision Physics with B^0_s -> J/psi phi at the LHC: The Quest for New Physics

Abstract

CP-violating effects in the time-dependent angular distribution of the B^0_s -> J/psi[-> ell^+ ell^-] phi[-> K^+K^-] decay products play a key role for the search of new physics. The hadronic Standard-Model uncertainties are related to doubly Cabibbo-suppressed penguin contributions and are usually assumed to be negligibly small. In view of recent results from the Tevatron and the quickly approaching start of the data taking at the LHC, we have a critical look at the impact of these terms, which could be enhanced through long-distance QCD phenomena, and explore the associated uncertainty for the measurement of the CP-violating B^0_s-\bar B^0_s mixing phase. We point out that these effects can actually be controlled by means of an analysis of the time-dependent angular distribution of the B^0_s -> J/psi[-> ell^+ ell^-] \bar K^{*0}[-> pi^+ K^-] decay products, and illustrate this through numerical studies. Moreover, we discuss SU(3)-breaking effects, which limit the theoretical accuracy of our method, and suggest internal consistency checks of SU(3).

28 pages, 10 figures

References in corpus (9)

• Averages of b-hadron and c-hadron Properties at the End of 2007
• Measurement of $\boldmath {B_s^0}$ mixing parameters from the flavor-tagged decay
• The Golden Modes B^0 -> J/psi K_{S,L} in the Era of Precision Flavour Physics
• $B_{s,d}\to \pi \pi ,\pi K,KK$: Status and Prospects
• Lifetime Difference in B_s mixing: Standard Model and beyond
• B decays dominated by omega-phi mixing
• Flavor symmetry for strong phases and determination of ${\beta }_s,\Delta \Gamma$ in $B_s\to J/\psi \varphi$
• Is there a non-Standard-Model contribution in non-leptonic b -> s decays?
• Search for $B^0\to J/\psi \varphi$

Cited by in corpus (1)

• The Golden Modes B^0 -> J/psi K_{S,L} in the Era of Precision Flavour Physics