Measurement of the ${\rm Y}$ polarizations in $pp$ collisions at $\sqrt{s}$=7 and 8TeV

LHCb collaboration, R. Aaij, B. Adeva +801

The polarization of the ${\rm Y}(1S)$, ${\rm Y}(2S)$ and ${\rm Y}(3S)$mesons, produced in $pp$ collisions at centre-of-mass energies $\sqrt{s}$=7 and 8TeV, is measured using data samples collected…