Amplitude analysis of the B+→π+ π+ π- decay
Name
PhysRevD.101.012006.pdf
Size
4.74 MB
Format
Adobe PDF
Checksum (MD5)
dc8017afaeccc3dabbb3e33325fcbc3d
Author(s)
LHCb Collaboration
Boettcher, T.
Craik, D. C
Weisser, Constantin
Williams, Michael
Alternative Title
Amplitude analysis of the B[superscript +]→π[superscript +]π[superscript +]π[superscript -] decay
Date Issued
January 2020
Journal
Physical Review D
Publisher
American Physical Society
Citation
LHCb Collaboration (Aaij, R., et al.), "Amplitude analysis of the B+→π+ π+ π- decay." Physical Review D 101 (Jan. 2020): no. 012006 doi 10.1103/PhysRevD.101.012006 ©2020 Author(s)
Version
Final published version
Abstract
The results of an amplitude analysis of the charmless three-body decay B[superscript +]→π[superscript +]π[superscript +]π[superscript -], in which CP-violation effects are taken into account, are reported. The analysis is based on a data sample corresponding to an integrated luminosity of 3 fb[superscript -1] of pp collisions recorded with the LHCb detector. The most challenging aspect of the analysis is the description of the behavior of the π[superscript +]π[superscript -] S-wave contribution, which is achieved by using three complementary approaches based on the isobar model, the K-matrix formalism, and a quasi-model-independent procedure. Additional resonant contributions for all three methods are described using a common isobar model, and include the ρ(770)[superscript 0], ω(782) and ρ(1450)[superscript 0] resonances in the π[superscript +]π[superscript -] P-wave, the f[subscript 2](1270) resonance in the π[superscript +]π[superscript -] D-wave, and the ρ[subscript 3](1690)[superscript 0] resonance in the π[superscript +]π[superscript -] F-wave. Significant CP-violation effects are observed in both S- and D-waves, as well as in the interference between the S- and P-waves. The results from all three approaches agree and provide new insight into the dynamics and the origin of CP-violation effects in B[superscript +]→π[superscript +]π[superscript +]π[superscript -] decays.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution 3.0 unported license
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.101.012006
