Abstract The NA60 experiment at the CERN SPS studies dimuon production in proton–nucleus and nucleus–nucleus collisions. The combined information from a novel vertex telescope made of radiation-tolerant silicon pixel detectors and from the muon spectrometer previously used in NA50 allows for a precise measurement of the muon vertex and a much improved dimuon mass resolution. We report on first results from the data taken for indium–indium collisions at 158 A GeV/nucleon in 2003, concentrating on a subsample of about 370 000 muon pairs in the mass range
First results from NA60 on low mass muon pair production in In-In collisions at 158-GeV/nucleon
DE FALCO, ALESSANDRO;PUDDU, GIOVANNA;USAI, GIANLUCA;
2005-01-01
Abstract
Abstract The NA60 experiment at the CERN SPS studies dimuon production in proton–nucleus and nucleus–nucleus collisions. The combined information from a novel vertex telescope made of radiation-tolerant silicon pixel detectors and from the muon spectrometer previously used in NA50 allows for a precise measurement of the muon vertex and a much improved dimuon mass resolution. We report on first results from the data taken for indium–indium collisions at 158 A GeV/nucleon in 2003, concentrating on a subsample of about 370 000 muon pairs in the mass range
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