Measurement of angular and CP asymmetries in D0→π+π−μ+μ− and D0→K+K−μ+μ− decaysстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 20 ноября 2020 г.
Аннотация:The first measurements of the forward-backward asymmetry of the dimuon pair (AFB), the triple-product asymmetry (A2ϕ), and the charge-parity-conjugation asymmetry (ACP), in D0→π+π−μ+μ− and D0→K+K−μ+μ− decays are reported. They are performed using data from proton-proton collisions collected with the LHCb experiment from 2011 to 2016, corresponding to a total integrated luminosity of 5 fb−1. The asymmetries are measured to be
AFB(D0→π+π−μ+μ−)A2ϕ(D0→π+π−μ+μ−)ACP(D0→π+π−μ+μ−)AFB(D0→K+K−μ+μ−)A2ϕ(D0→K+K−μ+μ−)ACP(D0→K+K−μ+μ−)=(3.3±3.7±0.6)%,=(−0.6±3.7±0.6)%,=(4.9±3.8±0.7)%,=(0±11±2)%,=(9±11±1)%,=(0±11±2)%,
where the first uncertainty is statistical and the second systematic. The asymmetries are also measured as a function of the dimuon invariant mass. The results are consistent with the Standard Model predictions.