Angular distribution and rotations of frame in vector meson decays into lepton pairs

Abstract

We discuss how the angular distribution of lepton pairs from decays of vector mesons depends on the choice of reference frame, and provide a geometrical description of the transformations of the coefficients of the angular distribution. Invariant expressions involving all coefficients are discussed, together with bounds and consistency relations.

7 pages, 3 figures

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• Quantum tomography for collider physics: Illustrations with lepton pair production
• Measurement of the ${\rm Y}$ polarizations in $pp$ collisions at $\sqrt{s}$=7 and 8TeV
• Prospects for quarkonium studies at the high-luminosity LHC
• Rotation-invariant observables as Density Matrix invariants
• On the Rotational Invariance and Non-Invariance of Lepton Angular Distributions in Drell-Yan and Quarkonium Production
• J/psi and Upsilon Polarization in Hadronic Production Processes
• $J/\psi$ polarization in large-$P_T$ semi-inclusive deep-inelastic scattering at the EIC
• Heavy quarks and quarkonia production in high-energy experiments