TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Garcia Martin, L. M.
AU  - Henry, L.
AU  - Jashal, B. K.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Remon Alepuz, C.
AU  - Ruiz Vidal, J.
AU  - Sanchez Mayordomo, C.
PY  - 2020
DA  - 2020//
TI  - Test of lepton universality with Lambda(0)(b) -> pK(-) l(+)l(-)
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 40 - 27pp
VL  - 05
IS  - 5
PB  - Springer
KW  - B physics
KW  - Branching fraction
KW  - Flavour Changing Neutral Currents
KW  - Hadron
KW  - Hadron scattering (experiments)
KW  - Rare decay
AB  - The ratio of branching fractions of the decays -> pK(-)mu(+)mu(-),RpK-1}, is measured for the first time using proton-proton collision data corresponding to an integrated luminosity of 4.7 fb(-1) recorded with the LHCb experiment at center-of-mass energies of 7, 8 and 13 TeV. In the dilepton mass-squared range 0.1 < q(2)< 6.0 GeV2/c(4) and the pK(-) mass range m(pK(-)) < 2600 MeV/c(2), the ratio of branching fractions is measured to be RpK-1=1.17-0.16+0.18 +/- 0.0$$ {R}_{pK}<^>{-1}={1.17}_{-0.16}<^>{+0.18}\pm 0.07 $$\end{document}, where the first uncertainty is statistical and the second systematic. This is the first test of lepton universality with b baryons and the first observation of the decay -> pK(-)e(+)e(-).
SN  - 1029-8479
UR  - https://arxiv.org/abs/1912.08139
UR  - https://doi.org/10.1007/JHEP05(2020)040
DO  - 10.1007/JHEP05(2020)040
LA  - English
N1  - WOS:000534629900001
ID  - LHCbCollaborationAaij_etal2020
ER  -