Model-Independent Search for CP Violation in D[superscript 0]→K[superscript −]K[superscript +]π[superscript −]π[superscript +] and D[superscript 0]→π[superscript −]π[superscript +]π[superscript +]π[superscript −] Decays
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Author(s)
Williams, Michael
Date Issued
November 2013
Journal
Physics Letters B
Publisher
Elsevier BV
Citation
Aaij, R., et al. “Model-Independent Search for CP Violation in D[superscript 0]→K[superscript −]K[superscript +]π[superscript −]π[superscript +] and D[superscript 0]→π[superscript −]π[superscript +]π[superscript +]π[superscript −] Decays.” Physics Letters B, vol. 726, no. 4–5, Nov. 2013, pp. 623–33.
© CERN for the benefit of the LHCb Collaboration
Version
Final published version
Abstract
A search for CP violation in the phase-space structures of D[superscript 0] and [bar over D][superscript 0]decays to the final states K[superscript -]K[superscript +] π[superscript -]π[superscript +] and π[superscript -]π[superscript +]π[superscript +]π[superscript -] is presented. The search is carried out with a data set corresponding to an integrated luminosity of 1.0fb[superscript -1] collected in 2011 by the LHCb experiment in pp collisions at a centre-of-mass energy of . For the K[superscript -]K[superscript +]π[superscript -]π[superscript +] final state, the four-body phase space is divided into 32 bins, each bin with approximately 1800 decays. The p-value under the hypothesis of no CP violation is 9.1%, and in no bin is a CP asymmetry greater than 6.5% observed. The phase space of the π[superscript -]π[superscript +]π[superscript +]π[superscript -] final state is partitioned into 128 bins, each bin with approximately 2500 decays. The p-value under the hypothesis of no CP violation is 41%, and in no bin is a CP asymmetry greater than 5.5% observed. All results are consistent with the hypothesis of no CP violation at the current sensitivity.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Attribution 3.0 United States (CC BY 3.0 US)
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DOI of Published Version
https://doi.org/10.1016/J.PHYSLETB.2013.09.011
