In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2018, No. 3 ( 2018-03)
Abstract:
We report the measurements of the CP -violating parameters in B s 0 → D s ∓ K ± decays observed in pp collisions, using a data set corresponding to an integrated luminosity of 3.0 fb −1 recorded with the LHCb detector. We measure C f = 0 . 73 ± 0 . 14 ± 0 . 05, A f ΔΓ = 0.39 ± 0.28 ± 0.15, $$ {A}_{\overline{f}}^{\varDelta \varGamma }=0.31\pm 0.28\pm 0.15 $$ A f ¯ Δ Γ = 0.31 ± 0.28 ± 0.15 , S f = −0 . 52 ± 0 . 20 ± 0 . 07, $$ {S}_{\overline{f}}=-0.49\pm 0.20\pm 0.07 $$ S f ¯ = − 0.49 ± 0.20 ± 0.07 , where the uncertainties are statistical and systematic, respectively. These parameters are used together with the world-average value of the B s 0 mixing phase, −2 β s , to obtain a measurement of the CKM angle γ from B s 0 → D s ∓ K ± decays, yielding γ = (128 − 22 + 17 ) ° modulo 180°, where the uncertainty contains both statistical and systematic contributions. This corresponds to 3 . 8 σ evidence for CP violation in the interference between decay and decay after mixing.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP03(2018)059
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2018
detail.hit.zdb_id:
2027350-2
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