Measurement of the CP-violating phase ϕs in Bs->J/ψπ+π- decays

Abstract

Measurement of the mixing-induced CP-violating phase phi_s in Bs decays is of prime importance in probing new physics. Here 7421 +/- 105 signal events from the dominantly CP-odd final state J/ψpi+ pi- are selected in 1/fb of pp collision data collected at sqrt{s} = 7 TeV with the LHCb detector. A time-dependent fit to the data yields a value of phi_s=-0.019^{+0.173+0.004}_{-0.174-0.003} rad, consistent with the Standard Model expectation. No evidence of direct CP violation is found.

15 pages, 10 figures; minor revisions on May 23, 2012

References in corpus (3)

• PYTHIA 6.4 Physics and Manual
• Precision Physics with B^0_s -> J/psi phi at the LHC: The Quest for New Physics
• Analysis of the resonant components in B0->J/ψpi+pi-

Cited by in corpus (7)

• Analysis of the resonant components in B0->J/ψpi+pi-
• Measurement of the CP-violating phase ${\varphi }_s$ in ${\overline{B}}_s^0\to J/\psi {\pi }^{+}{\pi }^{-}$ decays
• Measurement of the Bs effective lifetime in the J/psi f0(980) final state
• Time-dependent Dalitz-plot formalism for B_q -> J/ψ h+ h-
• Heavy Flavour Physics at the LHC
• First evidence for mixing-induced $CP$ violation in B${}_{\mathrm{s}}^0$ $\to$ J/$\psi \varphi$(1020) decays in pp collisions at $\sqrt{s}=$ 13 TeV
• Associated Production of Different Flavor Heavy Quarks Through $W^{\prime }$ Bosons at the LHC