TY - JOUR
T1 - Measurement of the branching fraction of the B0→D+sπ− decay
AU - Aaij, R.
AU - Adeva, B.
AU - Adinolfi, M.
AU - Ajaltouni, Z.
AU - Akar, S.
AU - Albrecht, J.
AU - Alessio, F.
AU - De Bruyn, K.
AU - Dufour, L.
AU - Mulder, M
AU - Onderwater, C. J. G.
AU - Pellegrino, A.
AU - Tolk, S.
AU - van Veghel, M.
AU - LHCb Collaboration
PY - 2021/4/12
Y1 - 2021/4/12
N2 - A branching fraction measurement of the B0→D+sπ−B0→Ds+π− decay is presented using proton–proton collision data collected with the LHCb experiment, corresponding to an integrated luminosity of 5.0fb−15.0fb−1. The branching fraction is found to be B(B0→D+sπ−)=(19.4±B(B0→Ds+π−)=(19.4± 1.8±1.3±1.2)×10−61.8±1.3±1.2)×10−6, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the B0→D−π+B0→D−π+, D+s→K+K−π+Ds+→K+K−π+ and D−→K+π−π−D−→K+π−π− branching fractions. This is the most precise single measurement of this quantity to date. As this decay proceeds through a single amplitude involving a b→ub→u charged-current transition, the result provides information on non-factorisable strong interaction effects and the magnitude of the Cabibbo–Kobayashi–Maskawa matrix element VubVub. Additionally, the collision energy dependence of the hadronisation-fraction ratio fs/fdfs/fd is measured through B¯¯¯¯0s→D+sπ−B¯s0→Ds+π− and B0→D−π+B0→D−π+ decays.
AB - A branching fraction measurement of the B0→D+sπ−B0→Ds+π− decay is presented using proton–proton collision data collected with the LHCb experiment, corresponding to an integrated luminosity of 5.0fb−15.0fb−1. The branching fraction is found to be B(B0→D+sπ−)=(19.4±B(B0→Ds+π−)=(19.4± 1.8±1.3±1.2)×10−61.8±1.3±1.2)×10−6, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the B0→D−π+B0→D−π+, D+s→K+K−π+Ds+→K+K−π+ and D−→K+π−π−D−→K+π−π− branching fractions. This is the most precise single measurement of this quantity to date. As this decay proceeds through a single amplitude involving a b→ub→u charged-current transition, the result provides information on non-factorisable strong interaction effects and the magnitude of the Cabibbo–Kobayashi–Maskawa matrix element VubVub. Additionally, the collision energy dependence of the hadronisation-fraction ratio fs/fdfs/fd is measured through B¯¯¯¯0s→D+sπ−B¯s0→Ds+π− and B0→D−π+B0→D−π+ decays.
U2 - 10.1140/epjc/s10052-020-08790-2
DO - 10.1140/epjc/s10052-020-08790-2
M3 - Article
SN - 1434-6044
VL - 81
JO - The European Physical Journal C
JF - The European Physical Journal C
IS - 4
M1 - 314
ER -