In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2018, No. 3 ( 2018-03)
Abstract:
A flavour-tagged decay-time-dependent amplitude analysis of B s 0 → ( K + π − )( K − π + ) decays is presented in the K ± π ∓ mass range from 750 to 1600MeV/ c 2 . The analysis uses pp collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3 . 0 fb −1 . Several quasi-two-body decay modes are considered, corresponding to K ± π ∓ combinations with spin 0, 1 and 2, which are dominated by the K 0 * (800) 0 and K 0 * (1430) 0 , the K * (892) 0 and the K 2 * (1430) 0 resonances, respectively. The longitudinal polarisation fraction for the $$ {B}_s^0\to {K}^{\ast }(892){}^{\circ}{\overline{K}}^{\ast }{(892)}^0 $$ B s 0 → K ∗ 892 ° K ¯ ∗ 892 0 decay is measured as f L = 0 . 208 ± 0 . 032 ± 0 . 046, where the first uncertainty is statistical and the second is systematic. The first measurement of the mixing-induced CP -violating phase, $$ {\phi}_s^{d\overline{d}} $$ ϕ s d d ¯ , in $$ b\to d\overline{d}s $$ b → d d ¯ s transitions is performed, yielding a value of $$ {\phi}_s^{d\overline{d}}=-0.10\pm 0.13\left(\mathrm{stat}\right)\pm 0.14 $$ ϕ s d d ¯ = − 0.10 ± 0.13 stat ± 0.14 (syst) rad.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP03(2018)140
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2018
detail.hit.zdb_id:
2027350-2
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