TY - JOUR
T1 - Measurement of the CKM angle γ and B0s-B¯¯¯¯0s mixing frequency with B0s→D∓sh±π±π∓ decays
AU - Aaij, R.
AU - Adeva, B.
AU - Adinolfi, M.
AU - Ajaltouni, Z.
AU - Akar, S.
AU - Albrecht, J.
AU - Alessio, F.
AU - Dufour, L.
AU - Mulder, M.
AU - De Bruyn, K.
AU - Onderwater, C. J. G.
AU - Pellegrino, A.
AU - Tolk, S.
AU - van Veghel, M.
AU - LHCb Collaboration
PY - 2021/3/15
Y1 - 2021/3/15
N2 - The CKM angle γ is measured for the first time from mixing-induced CP violation between B0s→D∓sK±π±π∓Bs0→Ds∓K±π±π∓ and B¯¯¯¯0s→D±sK∓π∓π±B¯s0→Ds±K∓π∓π± decays reconstructed in proton-proton collision data corresponding to an integrated luminosity of 9 fb−1 recorded with the LHCb detector. A time-dependent amplitude analysis is performed to extract the CP-violating weak phase γ − 2βs and, subsequently, γ by taking the B0s-B¯¯¯¯0sBs0-B¯s0 mixing phase βs as an external input. The measurement yields γ = (44 ± 12)° modulo 180°, where statistical and systematic uncertainties are combined. An alternative model-independent measurement, integrating over the five-dimensional phase space of the decay, yields γ=(44+20−13)∘γ=(44−13+20)∘ modulo 180°. Moreover, the B0s-B¯¯¯¯0sBs0-B¯s0 oscillation frequency is measured from the flavour-specific control channel B0s→D−sπ+π+π−Bs0→Ds−π+π+π− to be ∆ms = (17.757 ± 0.007(stat) ± 0.008(syst)) ps−1, consistent with and more precise than the current world-average value.
AB - The CKM angle γ is measured for the first time from mixing-induced CP violation between B0s→D∓sK±π±π∓Bs0→Ds∓K±π±π∓ and B¯¯¯¯0s→D±sK∓π∓π±B¯s0→Ds±K∓π∓π± decays reconstructed in proton-proton collision data corresponding to an integrated luminosity of 9 fb−1 recorded with the LHCb detector. A time-dependent amplitude analysis is performed to extract the CP-violating weak phase γ − 2βs and, subsequently, γ by taking the B0s-B¯¯¯¯0sBs0-B¯s0 mixing phase βs as an external input. The measurement yields γ = (44 ± 12)° modulo 180°, where statistical and systematic uncertainties are combined. An alternative model-independent measurement, integrating over the five-dimensional phase space of the decay, yields γ=(44+20−13)∘γ=(44−13+20)∘ modulo 180°. Moreover, the B0s-B¯¯¯¯0sBs0-B¯s0 oscillation frequency is measured from the flavour-specific control channel B0s→D−sπ+π+π−Bs0→Ds−π+π+π− to be ∆ms = (17.757 ± 0.007(stat) ± 0.008(syst)) ps−1, consistent with and more precise than the current world-average value.
U2 - 10.1007/JHEP03(2021)137
DO - 10.1007/JHEP03(2021)137
M3 - Article
VL - 2021
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
SN - 1126-6708
IS - 3
M1 - 137
ER -