Determination of γ and −2$β_s$ from charmless two-body decays of beauty mesonsстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 22 октября 2015 г.
Аннотация:
Time-dependent CP violation is measured in the \optbarB0→J/ψπ+π− channel for each π+π− resonant final state using data collected with an integrated luminosity of 3.0 fb−1 in pp collisions using the LHCb detector. The final state with the largest rate, J/ψρ0(770), is used to measure the CP -violating angle 2βeff to be (41.7±9.6+2.8−6.3)∘. This result can be used to limit the size of penguin amplitude contributions to CP violation measurements in, for example, \optbarB0s→J/ψϕ decays. Assuming approximate SU(3) flavour symmetry and neglecting higher order diagrams, the shift in the CP -violating phase ϕs is limited to be within the interval [−1.05∘, +1.18∘] at 95\% confidence level. Changes to the limit due to SU(3) symmetry breaking effects are also discussed.