Amplitude analysis of B[superscript −]→D[superscript +]π[superscript −]π[superscript −] decays
Name
PhysRevD.94.072001.pdf
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1.97 MB
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Checksum (MD5)
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Ajaltouni, Z.
Akar, S.
Albrecht, J.
Alessio, F.
Alexander, M.
Ali, S.
Alkhazov, G.
Alternative Title
Amplitude analysis of B−→D+π−π− decays
Date Issued
October 2016
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aaij, R. et al. “Amplitude Analysis of B[superscript −] → D[superscript +] π[superscript −]π[superscript −] Decays.” Physical Review D 94.7 (2016): n. pag. © 2016 American Physical Society
Version
Final published version
Abstract
The Dalitz plot analysis technique is used to study the resonant substructures of B[superscript -]→D[superscript +]π[superscript -]π[superscript -] decays in a data sample corresponding to 3.0 fb[superscript -1] of pp collision data recorded by the LHCb experiment during 2011 and 2012. A model-independent analysis of the angular moments demonstrates the presence of resonances with spins 1, 2 and 3 at high D[superscript +]π[superscript -] mass. The data are fitted with an amplitude model composed of a quasi-model-independent function to describe the D[superscript +]π[superscript -] S wave together with virtual contributions from the D*(2007)[superscript 0] and B*[superscript 0] states, and components corresponding to the D*[subscript 2](2460)[superscript 0], D*[subscript 1](2680)[superscript 0], D*[subscript 3](2760)[superscript 0] and D*[subscript 2](3000)[superscript 0] resonances. The masses and widths of these resonances are determined together with the branching fractions for their production in B[superscript -]→D[superscript +]π[superscript -]π[superscript -] decays. The D[superscript +]π[superscript -] S wave has phase motion consistent with that expected due to the presence of the D*[subscript 0](2400)[superscript 0] state. These results constitute the first observations of the D*[subscript 3](2760)[superscript 0] and D*[subscript 2](3000)[superscript 0] resonances, with significances of 10σ and 6.6σ, respectively.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevD.94.072001
