Angular Analysis of the B [superscript o] → K*[superscript o] μ ⁺ μ⁻ Decay Using 3 Fb⁻¹ of Integrated Luminosity
Name
JHEP02(2016)104.pdf
Size
6.46 MB
Format
Adobe PDF
Checksum (MD5)
8ef4a537039e569f7d38e3aa484a5900
Author(s)
LHCB Collaboration
Ilten, Philip J
Williams, Michael
Date Issued
February 2016
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
Aaij, R. et al. “Angular Analysis of the B [superscript o] → K*[superscript o] μ ⁺ μ⁻ Decay Using 3 Fb⁻¹ of Integrated Luminosity.” Journal of High Energy Physics 2016, 2 (February 2016): 104 © 2016 The Author(s)
Version
Final published version
Abstract
An angular analysis of the B [superscript o] → K*[superscript o] (→ K⁺π⁻)μ ⁺μ⁻ decay is presented. The dataset corresponds to an integrated luminosity of 3.0 fb⁻¹ of pp collision data collected at the LHCb experiment. The complete angular information from the decay is used to determine CP-averaged observables and CP asymmetries, taking account of possible contamination from decays with the K⁺π⁻ system in an S-wave configuration. The angular observables and their correlations are reported in bins of q², the invariant mass squared of the dimuon system. The observables are determined both from an unbinned maximum likelihood fit and by using the principal moments of the angular distribution. In addition, by fitting for q²-dependent decay amplitudes in the region 1.1 < q²< 6.0 GeV 2 /c⁴, the zero-crossing points of several angular observables are computed. A global fit is performed to the complete set of CP-averaged observables obtained from the maximum likelihood fit. This fit indicates differences with predictions based on the Standard Model at the level of 3.4 standard deviations. These differences could be explained by contributions from physics beyond the Standard Model, or by an unexpectedly large hadronic effect that is not accounted for in the Standard Model predictions.[Figure not available: see fulltext.] Keywords: Rare decay; Hadron-Hadron scattering; FCNC Interaction; B physics; Flavor physics
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 4.0 International License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/JHEP02(2016)104
