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

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2017_ jhighenergphys_lhcbcollab_measurement.pdf (1.52 MB)
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URI: http://hdl.handle.net/10347/22654
ISSN: 1029-8479
DOI: 10.1007/JHEP12(2017)110

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2017

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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 p ΥT < 30 GeV/c and rapidity 2.2 < yY < 4.5. No large polarization is observed.

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Hadron-Hadron scattering (experiments)| Particle and resonance production| Polarization| QCD

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Aaij, R., Adeva, B., Adinolfi, M. et al. Measurement of the Y(nS) polarizations in pp collisions at √s=7 and 8 TeV. J. High Energ. Phys. 2017, 110 (2017). https://doi.org/10.1007/JHEP12(2017)110

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© CERN, for the bene t of the LHCb Collaboration. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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