Three-Nucleon Force and theAyPuzzle in Intermediate Energyp→+dandd→+pElastic Scattering

New vector analyzing-power data on $\overrightarrow{p}+d$ elastic scattering at $E_p=150\mathrm{}$ and $190\mathrm{MeV}$ have been measured. These are presented together with existing data and with recent $\overrightarrow{d}+p$ vector and tensor analyzing power data at $E_d=270\mathrm{}\mathrm{MeV}$. The strong negative extremum of both vector analyzing powers $A_y^p$ and $A_y^d$ at ${\theta }_{\mathrm{c}.\mathrm{m}.\mathrm{}}\simeq 80°–120°$ is underestimated by Faddeev calculations using modern $\mathrm{NN}$ forces. Inclusion of the Tucson-Melbourne $3N$ force shifts the minima upwards, but with conflicting results for $A_y^p$, and leading to a good description for $A_y^d$. An $A_y^p$ puzzle, previously thought to exist at energies $E_N\le 30\mathrm{MeV}$ only, appears to exist also at intermediate energies.