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Observation of Bc+ → D0K+ decays
Physical Review Letters. 2017. Vol. 118. No. 11. P. 111803-1-111803-9.
Using proton-proton collision data corresponding to an integrated luminosity of 3.0fb−1, recorded by the LHCb detector at centre-of-mass energies of 7 and 8TeV, the Bc+ → D0K+ decay is observed with a statistical significance of 5.1 standard deviations. By normalising to B+ → D0π+ decays, a measurement of the branching fraction multiplied by the production rates for Bc+ relative to B+ mesons in the LHCb acceptance is obtained,
R 0 =fc ×B(B+→D0K+)=(9.3+2.8±0.6)×10−7, DKfu c −2.5
where the first uncertainty is statistical and the second is systematic. This decay is expected to proceed predominantly through weak annihilation and penguin amplitudes, and is the first Bc+ decay of this nature to be observed.
Keywords: HEP LHC Standard Model
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Aaij R., Beteta C. A., Arzymatov K. et al., Journal of High Energy Physics 2021 Vol. 2021 No. 3 Article 75
The time-dependent CP asymmetries of B0 → π+π− and B0s → K+K− decays are measured using a data sample of pp collisions corresponding to an integrated luminosity of 1.9 fb−1, collected with the LHCb detector at a centre-of-mass energy of 13 TeV. The results are
Cππ=−0.311±0.045±0.015, Sππ=−0.706±0.042±0.013, CKK=0.123±0.034±0.015, SKK=0.164±0.034±0.014, AΔΓKK=−0.83±0.05±0.09,
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IEEE, 2015
Added: March 16, 2015
Пенза : ПГУ, 2015
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