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.

Measurement of the Y(nS) polarizations in pp collisions at √s=7 and 8 TeV

De Serio, M.;Pappagallo, M.;
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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/215729
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