Search for the CP -violating strong decays η → π + π − and η ′ (958)→ π + π −
Name
1-s2.0-S0370269316306955-main.pdf
Size
894.73 KB
Format
Unknown
Checksum (MD5)
9ee63d485df9553999c65493d4a4432e
Author(s)
The LHCb Collaboration
Boettcher, Thomas Julian
Ilten, Philip J
Williams, M.
Date Issued
November 2016
Journal
Physics Letters B
Publisher
Elsevier BV
Citation
Aaij, R., B. Adeva, M. Adinolfi, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, et al. “Search for the CP -Violating Strong Decays η → π + π − and η ′ (958)→ π + π −.” Physics Letters B 764 (January 2017): 233–240. doi:10.1016/j.physletb.2016.11.032.
Version
Final published version
Abstract
© 2016 The Author A search for the CP-violating strong decays η→π+π−and η'(958)→π+π−has been performed using approximately 2.5×107events of each of the decays D+→π+π+π−and Ds+→π+π+π−, recorded by the LHCb experiment. The data set corresponds to an integrated luminosity of 3.0 fb−1of pp collision data recorded during LHC Run 1 and 0.3 fb−1recorded in Run 2. No evidence is seen for D(s)+→π+η(')with η(')→π+π−, and upper limits at 90% confidence level are set on the branching fractions, B(η→π+π−)<1.6×10−5and B(η'→π+π−)<1.8×10−5. The limit for the η decay is comparable with the existing one, while that for the η'is a factor of three smaller than the previous limit.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/J.PHYSLETB.2016.11.032
