PT Journal
AU LHCb Collaboration (Aaij, Rea
   Garcia Martin, LM
   Henry, L
   Martinez-Vidal, F
   Oyanguren, A
   Remon Alepuz, C
   Ruiz Valls, P
   Ruiz Vidal, J
   Sanchez Mayordomo, C
TI Measurement of the Y(nS) polarizations in pp collisions at root s=7 and 8 TeV
SO Journal of High Energy Physics
JI J. High Energy Phys.
PY 2017
BP 110
EP 60pp
VL 12
IS 12
DI 10.1007/JHEP12(2017)110
LA English
DE Hadron-Hadron scattering (experiments); Particle and resonance production; Polarization; QCD
AB The polarization of the (sic) (1S), (sic) (2S) and (sic) (3S) mesons, produced in pp collisions at centre-of-mass energies root s = 7 and 8TeV, is measured using data samples collected by the LHCb experiment, corresponding to integrated luminosities of 1 and 2 fb(-1), respectively. The measurements are performed in three polarization frames, using (sic) -> μμdecays in the kinematic region of the transverse momentum p(T)((sic)) < 30 GeV/c and rapidity 2.2 < y((sic)) < 4.5. No large polarization is observed.
ER