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13 papers
A comparative measurement of and in In-In collisions at the CERN SPS
NA60 Collaboration, R. Arnaldi, K. Banicz +49
The NA60 experiment at the CERN SPS has studied meson production in In-In collisions at 158A GeV via both the and the decay channels. The yields and inverse s…
Determination of chi_c and chi_b polarizations from dilepton angular distributions in radiative decays
Pietro Faccioli, Carlos Lourenco, Joao Seixas +1
The angular distributions of the decay products in the successive decays chi_c (chi_b) to J/psi (Upsilon) gamma and J/psi (Upsilon) to l+l- are calculated as a function of the angu…
Model-independent constraints on the shape parameters of dilepton angular distributions
Pietro Faccioli, Carlos Lourenco, Joao Seixas +1
The coefficients determining the dilepton decay angular distribution of vector particles obey certain positivity constraints and a rotation-invariant identity. These relations are…
Rotation-invariant observables in parity-violating decays of vector particles to fermion pairs
Pietro Faccioli, Carlos Lourenco, Joao Seixas +1
The di-fermion angular distribution observed in decays of inclusively produced vector particles is characterized by two frame-independent observables, reflecting the average spin-a…
Heavy quarkonium: progress, puzzles, and opportunities
N. Brambilla, S. Eidelman, B. K. Heltsley +64
A golden age for heavy quarkonium physics dawned a decade ago, initiated by the confluence of exciting advances in quantum chromodynamics (QCD) and an explosion of related experime…
NA60 results on thermal dimuons
NA60 Collaboration, R. Arnaldi, K. Banicz +50
The NA60 experiment at the CERN SPS has measured muon pairs with unprecedented precision in 158A GeV In-In collisions. A strong excess of pairs above the known sources is observed…