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First study of the CP-violating phase and decay-width difference in B0s → ψ(2S)φ decays

MPS-Authors
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Blouw,  J.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Popov,  D.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Schmelling,  M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Zavertiaev,  M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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1608.04855.pdf
(Preprint), 638KB

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Citation

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., et al. (2017). First study of the CP-violating phase and decay-width difference in B0s → ψ(2S)φ decays. Physics Letters B, 762, 253-236. doi:10.1016/j.physletb.2016.09.028.


Cite as: https://hdl.handle.net/21.11116/0000-0005-8B35-3
Abstract
A time-dependent angular analysis of $B_s^0\to\psi(2S)\phi$ decays is
performed using data recorded by the LHCb experiment. The data set corresponds
to an integrated luminosity of 3.0\invfb collected during Run 1 of the LHC. The
CP-violating phase and decay-width difference of the $B_s^0$ system are
measured to be $\phi_s = 0.23^{+0.29}_{-0.28} \pm 0.02$ rad and $\Delta\Gamma_s
= 0.066^{+0.041}_{-0.044} \pm 0.007$ ps$^{-1}$, respectively, where the first
uncertainty is statistical and the second systematic. This is the first time
that $\phi_s$ and $\Delta\Gamma_s$ have been measured in a decay containing the
$\psi(2S)$ resonance.