paper

A comparative measurement of $Ï\rightarrow K^+K^-$ and $Ï\rightarrow Î¼^+Î¼^-$ in In-In collisions at the CERN SPS

arXiv:1104.4060 · doi:10.1016/j.physletb.2011.04.028

Abstract

The NA60 experiment at the CERN SPS has studied $Ï$ meson production in In-In collisions at 158A GeV via both the $K^+K^-$ and the $Î¼^+Î¼^-$ decay channels. The yields and inverse slope parameters of the $m_T$ spectra observed in the two channels are compatible within errors, different from the large discrepancies seen in Pb-Pb collisions between the hadronic (NA49) and dimuon (NA50) decay channels. Possible physics implications are discussed.

A comparative measurement of $Ï\rightarrow K^+K^-$ and $Ï\rightarrow Î¼^+Î¼^-$ in In-In collisions at the CERN SPS

Abstract

A comparative measurement of $Ï\rightarrow K^+K^-$ and $Ï\rightarrow Î¼^+Î¼^-$ in In-In collisions at the CERN SPS