In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2019, No. 3 ( 2019-03)
Abstract:
The branching fractions of the doubly Cabibbo-suppressed decays D + → K − K + K + , D + → π − π + K + and D s + → π − K + K + are measured using the decays D + → K − π + π + and D s + → K − K + π + as normalisation channels. The measurements are performed using proton-proton collision data collected with the LHCb detector at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 2.0 fb −1 . The results are $$ \begin{array}{c}\hfill \frac{\mathrm{\mathcal{B}}\left({D}^{+}\to {K}^{-}{K}^{+}{K}^{+}\right)}{\mathrm{\mathcal{B}}\left({D}^{+}\to {K}^{-}{\pi}^{+}{\pi}^{+}\right)} = \left(6.541\pm 0.025\pm 0.042\right)\times {10}^{-4},\hfill \\ {}\hfill \frac{\mathrm{\mathcal{B}}\left({D}^{+}\to\ {\pi}^{-}{\pi}^{+}{K}^{+}\right)}{\mathrm{\mathcal{B}}\left({D}^{+}\to {K}^{-}{\pi}^{+}{\pi}^{+}\right)}=\left(5.231\pm 0.009\pm 0.023\right)\times {10}^{-3},\hfill \\ {}\hfill \frac{\mathrm{\mathcal{B}}\left({D}_s^{+}\to\ {\pi}^{-}{K}^{+}{K}^{+}\right)}{\mathrm{\mathcal{B}}\left({D}_s^{+}\to {K}^{-}{K}^{+}{\pi}^{+}\right), } = \left(2.372\pm 0.024\pm 0.025\right)\times {10}^{-3},\hfill \end{array} $$ ℬ D + → K − K + K + ℬ D + → K − π + π + = 6.541 ± 0.025 ± 0.042 × 10 − 4 , ℬ D + → π − π + K + ℬ D + → K − π + π + = 5.231 ± 0.009 ± 0.023 × 10 − 3 , ℬ D s + → π − K + K + ℬ D s + → K − K + π + , = 2.372 ± 0.024 ± 0.025 × 10 − 3 , where the uncertainties are statistical and systematic, respectively. These are the most precise measurements up to date.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP03(2019)176
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2019
detail.hit.zdb_id:
2027350-2
