The ALICE Collaboration has studied J/ψ production in pp collisions at √s=7  TeV at the LHC through its muon pair decay. The polar and azimuthal angle distributions of the decay muons were measured, and results on the J/ψ polarization parameters λθ and λϕ were obtained. The study was performed in the kinematic region 2.5<y<4, 2<pt<8  GeV/c, in the helicity and Collins-Soper reference frames. In both frames, the polarization parameters are compatible with zero, within uncertainties.

J/ψ Polarization in pp Collisions at √s=7  TeV / Abelev, B., Adam, J., Adamová, D., Adare, A.M., Aggarwal, M.M., Aglieri Rinella, G., Agocs, A.G., Agostinelli, A., Aguilar Salazar, S., Ahammed, Z., Ahmad, N., Ahmad Masoodi, A., Ahn, S.U., Akindinov, A., Aleksandrov, D., Alessandro, B., Alfaro Molina, R., Alici, A., Alkin, A., Almaráz Aviña, E., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 108:8(2012). [10.1103/PhysRevLett.108.082001]

J/ψ Polarization in pp Collisions at √s=7  TeV

G. E. Bruno;
2012

Abstract

The ALICE Collaboration has studied J/ψ production in pp collisions at √s=7  TeV at the LHC through its muon pair decay. The polar and azimuthal angle distributions of the decay muons were measured, and results on the J/ψ polarization parameters λθ and λϕ were obtained. The study was performed in the kinematic region 2.5
2012
http://link.aps.org/doi/10.1103/PhysRevLett.108.082001
J/ψ Polarization in pp Collisions at √s=7  TeV / Abelev, B., Adam, J., Adamová, D., Adare, A.M., Aggarwal, M.M., Aglieri Rinella, G., Agocs, A.G., Agostinelli, A., Aguilar Salazar, S., Ahammed, Z., Ahmad, N., Ahmad Masoodi, A., Ahn, S.U., Akindinov, A., Aleksandrov, D., Alessandro, B., Alfaro Molina, R., Alici, A., Alkin, A., Almaráz Aviña, E., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 108:8(2012). [10.1103/PhysRevLett.108.082001]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/7193
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