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LHCb Collaboration,Aaij, R.,Abellan Beteta, C.,Adeva, B.,Adinolfi, M.,Adrover, C.,Affolder, A.,Ajaltouni, Z.,Albrecht, J.,Alessio, F.,Alexander, M.,Alkhazov, G.,Alvarez Cartelle, P.,Alves, A.A.,Amato, North-Holland Pub. Co 2011 Physics letters: B Vol.706 No.1
The first observation of the decay B@?<SUB>s</SUB><SUP>0</SUP>→D<SUP>0</SUP>K<SUP>@?0</SUP> using pp data collected by the LHCb detector at a centre-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 36 pb<SUP>-1</SUP>, is reported. A signal of 34.4+/-6.8 events is obtained and the absence of signal is rejected with a statistical significance of more than nine standard deviations. The B@?<SUB>s</SUB><SUP>0</SUP>→D<SUP>0</SUP>K<SUP>@?0</SUP> branching fraction is measured relative to that of B@?<SUP>0</SUP>→D<SUP>0</SUP>ρ<SUP>0</SUP>: B(B@?<SUB>s</SUB><SUP>0</SUP>→D<SUP>0</SUP>K<SUP>@?0</SUP>)B(B@?<SUP>0</SUP>→D<SUP>0</SUP>ρ<SUP>0</SUP>)=1.48+/-0.34+/-0.15+/-0.12, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the ratio of the B<SUP>0</SUP> and B<SUB>s</SUB><SUP>0</SUP> hadronisation fractions.
Search for CP violation in the decay D<sup>+</sup>→π<sup>-</sup>π<sup>+</sup>π<sup>+</sup>
North-Holland Pub. Co 2014 Physics letters: B Vol.728 No.-
A search for CP violation in the phase space of the decay D<SUP>+</SUP>→π<SUP>-</SUP>π<SUP>+</SUP>π<SUP>+</SUP> is reported using pp collision data, corresponding to an integrated luminosity of 1.0 fb<SUP>-1</SUP>, collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. The Dalitz plot distributions for 3.1x10<SUP>6</SUP>D<SUP>+</SUP> and D<SUP>-</SUP> candidates are compared with binned and unbinned model-independent techniques. No evidence for CP violation is found.