First study of the CP-violating phase and decay-width difference in Bs0→ψ(2S)ϕ decays

2016/08/31 by LHCb collaboration, R. Aaij, B. Adeva +772 · 2 citations
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Phase (matter) #Philosophy #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Scroll #Theology #hep-ex

paper · pdf · doi:10.1016/j.physletb.2016.09.028

published as Phys. Lett. B762 (2016) 253-262 · All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-027.html

openalex created_date 2016/09/16 · openalex publication_date 2016/09/21 · arxiv created 2017/01/13 · arxiv updated 2017/01/16 · openalex updated_date 2026/08/05

Abstract

A time-dependent angular analysis of B s 0 → ψ ( 2 S ) ϕ decays is performed using data recorded by the LHCb experiment. The data set corresponds to an integrated luminosity of 3.0 fb − 1 collected during Run 1 of the LHC. The CP -violating phase and decay-width difference of the B s 0 system are measured to be ϕ s = 0.23 − 0.28 + 0.29 ± 0.02 rad and Δ Γ s = 0.066 − 0.044 + 0.041 ± 0.007 ps − 1 , respectively, where the first uncertainty is statistical and the second systematic. This is the first time that ϕ s and Δ Γ s have been measured in a decay containing the ψ ( 2 S ) resonance.

Citations

• Measurement of theCP-violating phaseβsJ/ψϕinBs0→J/ψϕdecays with the CDF II detector
• PHOTOS Monte Carlo: a precision tool for QED correctionsin Z and W decays
• CP violation and the CKM matrix: assessing the impact of the asymmetric B factories
• A Decision-Theoretic Generalization of On-Line Learning and an Application to Boosting
• Geant4 developments and applications
• Current status of the standard model CKM fit and constraints onΔF=2new physics
• CP-Violation in the Renormalizable Theory of Weak Interaction
• Determination of the Sign of the Decay Width Difference in theBs0System
• Review of Multibody Charm Analyses
• Big-Bang Nucleosynthesis

Cited by

• Measurement of the CP-violating phase φ _s in B_s⁰ → J/ψ φ decays in ATLAS at 13 TeV
• Observation of the decay B s 0 → η c ϕ and evidence for B s 0 → η c π + π −