The polarization of the Y(1S), Y(2S) and Y(3S) mesons, produced in pp collisions at centre-of-mass energies s=7 and 8 TeV, 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 Y → μμ decays in the kinematic region of the transverse momentum pTΥ < 30 GeV/c and rapidity 2.2 < yY < 4.5. No large polarization is observed.
(2017). Measurement of the Y(nS) polarizations in pp collisions at √s=7 and 8 TeV [journal article - articolo]. In JOURNAL OF HIGH ENERGY PHYSICS. Retrieved from https://hdl.handle.net/10446/288154
Measurement of the Y(nS) polarizations in pp collisions at √s=7 and 8 TeV
Lupato A;Redi F;
2017-01-01
Abstract
The polarization of the Y(1S), Y(2S) and Y(3S) mesons, produced in pp collisions at centre-of-mass energies s=7 and 8 TeV, 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 Y → μμ decays in the kinematic region of the transverse momentum pTΥ < 30 GeV/c and rapidity 2.2 < yY < 4.5. No large polarization is observed.| File | Dimensione del file | Formato | |
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