Measurement of CP asymmetry in B[subscript s][superscript 0 ]→ D[subscript s][superscript ∓]K[superscript ±] decays
Name
13130_2018_Article_7771.pdf
Size
1011.82 KB
Format
Adobe PDF
Checksum (MD5)
c30d5b0f0d2f9aa71882e8c4213ef8f7
Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Ajaltouni, Z.
Akar, S.
Albrecht, J.
Alessio, F.
Alexander, M.
Alfonso Albero, A.
Ali, S.
Date Issued
March 2018
Journal
Journal of High Energy Physics
Publisher
Springer International Publishing AG
Citation
Aaij, R. et al. "Measurement of CP asymmetry in B[subscript s][superscript 0 ]→ D[subscript s][superscript ∓]K[superscript ±] decays." Journal of High Energy Physics 2018 (March 2018): 59 © 2018 The Author(s)
Version
Final published version
Abstract
We report the measurements of the CP-violating parameters in B[subscript s][superscript 0]→ D [subscript s][superscript ∓]K[superscript ±] decays observed in pp collisions, using a data set corresponding to an integrated luminosity of 3.0 fb[superscript −1] recorded with the LHCb detector. We measure C [subscript f] = 0.73 ± 0.14 ± 0.05, A[superscript Δ Γ][subscript f] = 0.39 ± 0.28 ± 0.15, A[superscript Δ Γ]¯[subscript f] = 0.31 ± 0.28 ± 0.15, S [subscript f] = −0.52 ± 0.20 ± 0.07, S [subscript 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[subscript s][superscript 0] mixing phase, −2β[subscript s], to obtain a measurement of the CKM angle γ from B [subscript s][superscript 0] → D s[superscript ∓]K[superscript ±] decays, yielding γ = (128[subscript − 22 ][superscript + 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. Keywords: CKM angle gamma; CP violation; B physics; Flavor physics; Hadron-Hadron scattering (experiments)
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
http://dx.doi.org/10.1007/JHEP03(2018)059
