The Library
Measurement of the CP-violating phase βsJ/ψ in Bs0→J/ψ decays with the CDF II detector
Tools
Tools
Tools
(2012) Measurement of the CP-violating phase βsJ/ψ in Bs0→J/ψ decays with the CDF II detector. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.85 (No.7). 072002. doi:10.1103/PhysRevD.85.072002 ISSN 1550-7998.
Research output not available from this repository.
Request-a-Copy directly from author or use local Library Get it For Me service.
Official URL: http://dx.doi.org/10.1103/PhysRevD.85.072002
Abstract
We present a measurement of the CP-violating parameter βsJ/ψ using approximately 6500 Bs0→J/ψ decays reconstructed with the CDF II detector in a sample of pp̄ collisions at √s=1.96TeV corresponding to 5.2fb -1 integrated luminosity produced by the Tevatron collider at Fermilab. We find the CP-violating phase to be within the range βsJ/ψ [0.02,0.52] [1.08,1.55] at 68% confidence level where the coverage property of the quoted interval is guaranteed using a frequentist statistical analysis. This result is in agreement with the standard model expectation at the level of about one Gaussian standard deviation. We consider the inclusion of a potential S-wave contribution to the Bs0→J/ψK +K - final state which is found to be negligible over the mass interval 1.009<m(K +K -)<1.028GeV/c2. Assuming the standard model prediction for the CP-violating phase βsJ/ψ, we find the Bs0 decay width difference to be ΔΓ s=0.075±0.035(stat) ±0.006(syst)ps -1. We also present the most precise measurements of the Bs0 mean lifetime τ(Bs0)=1.529±0.025(stat) ±0.012(syst)ps, the polarization fractions |A 0(0)|2=0. 524±0.013(stat)±0.015(syst) and |A -(0)|2=0. 231±0.014(stat)±0.015(syst), as well as the strong phase δ -=2.95±0.64(stat)±0.07(syst)rad. In addition, we report an alternative Bayesian analysis that gives results consistent with the frequentist approach. © 2012 American Physical Society.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Physical Review D (Particles, Fields, Gravitation and Cosmology) | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 1550-7998 | ||||
| Official Date: | 24 April 2012 | ||||
| Dates: |
|
||||
| Volume: | Vol.85 | ||||
| Number: | No.7 | ||||
| Page Range: | 072002 | ||||
| DOI: | 10.1103/PhysRevD.85.072002 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
Request changes or add full text files to a record
Repository staff actions (login required)
 |
View Item |
