Measurement of the CP violating phase φs in B-s0→J/ψf0(980)

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Abstract

Measurement of mixing-induced CP violation in B-s0 decays is of prime importance in probing new physics. So far only the channel B-s0→J/ψφ has been used. Here we report on a measurement using an LHCb data sample of 0.41 fb-1, in the CP odd eigenstate J/ψf0(980), where f0(980)→π+π-. A time-dependent fit of the data with the B-s0 lifetime and the difference in widths of the heavy and light eigenstates constrained to the values obtained from B-s0→J/ψφ yields a value of the CP violating phase of -0.44±0.44±0.02 rad, consistent with the Standard Model expectation. © 2012 CERN.

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Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., … Zvyagin, A. (2012). Measurement of the CP violating phase φs in B-s0→J/ψf0(980). Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 707(5), 497–505. https://doi.org/10.1016/j.physletb.2012.01.017

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