NA60 results on the rho spectral function in In-In collisions

The NA60 experiment at the CERN SPS has studied low-mass muon pairs in 158 AGeV In-In collisions. A strong excess of pairs is observed above the yield expected from neutral meson decays. After subtraction of the decay sources, the shape of the resulting mass spectrum is largely consistent with a dom...

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Detalles Bibliográficos
Autores principales: Damjanovic, S., Arnaldi, R., Averbeck, R., Banicz, K., Castor, J., chaurand, B., Cicalo, C., Colla, A., Cortese, P., David, Andre, De Falco, A., Devaux, A., Drees, A., Ducroux, L., En'yo, H., Ferretti, A., Floris, M., Forster, A., Force, P., Guettet, N., Guichard, A., Gulkanian, H., Heuser, J., Keil, M., Kluberg, L., Lourenco, C., Lozano, J., Manso, F., Masoni, A., Martins, P., Neves, A., Ohnishi, H., Oppedisano, C., Parracho, P., Pillot, P., Puddu, G., Radermacher, E., Ramalhete, P., Rosinsky, P., Scomparin, E., Seixas, J., Serci, S., Shahoyan, R., Sonderegger, P., Specht, H.J., Tieulent, R., Usai, G., Veenhof, R., Wohri, H.K.
Lenguaje:eng
Publicado: 2007
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/j.nuclphysa.2006.11.015
http://cds.cern.ch/record/1009254
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author Damjanovic, S.
Arnaldi, R.
Averbeck, R.
Banicz, K.
Castor, J.
chaurand, B.
Cicalo, C.
Colla, A.
Cortese, P.
David, Andre
De Falco, A.
Devaux, A.
Drees, A.
Ducroux, L.
En'yo, H.
Ferretti, A.
Floris, M.
Forster, A.
Force, P.
Guettet, N.
Guichard, A.
Gulkanian, H.
Heuser, J.
Keil, M.
Kluberg, L.
Lourenco, C.
Lozano, J.
Manso, F.
Masoni, A.
Martins, P.
Neves, A.
Ohnishi, H.
Oppedisano, C.
Parracho, P.
Pillot, P.
Puddu, G.
Radermacher, E.
Ramalhete, P.
Rosinsky, P.
Scomparin, E.
Seixas, J.
Serci, S.
Shahoyan, R.
Sonderegger, P.
Specht, H.J.
Tieulent, R.
Usai, G.
Veenhof, R.
Wohri, H.K.
author_facet Damjanovic, S.
Arnaldi, R.
Averbeck, R.
Banicz, K.
Castor, J.
chaurand, B.
Cicalo, C.
Colla, A.
Cortese, P.
David, Andre
De Falco, A.
Devaux, A.
Drees, A.
Ducroux, L.
En'yo, H.
Ferretti, A.
Floris, M.
Forster, A.
Force, P.
Guettet, N.
Guichard, A.
Gulkanian, H.
Heuser, J.
Keil, M.
Kluberg, L.
Lourenco, C.
Lozano, J.
Manso, F.
Masoni, A.
Martins, P.
Neves, A.
Ohnishi, H.
Oppedisano, C.
Parracho, P.
Pillot, P.
Puddu, G.
Radermacher, E.
Ramalhete, P.
Rosinsky, P.
Scomparin, E.
Seixas, J.
Serci, S.
Shahoyan, R.
Sonderegger, P.
Specht, H.J.
Tieulent, R.
Usai, G.
Veenhof, R.
Wohri, H.K.
author_sort Damjanovic, S.
collection CERN
description The NA60 experiment at the CERN SPS has studied low-mass muon pairs in 158 AGeV In-In collisions. A strong excess of pairs is observed above the yield expected from neutral meson decays. After subtraction of the decay sources, the shape of the resulting mass spectrum is largely consistent with a dominant contribution from pi+pi- -> rho -> mu+mu- annihilation. The associated rho spectral function exhibits considerable broadening, but essentially no shift in mass. The acceptance-corrected pT spectra have a shape atypical for radial flow. They also significantly depend on mass, pointing to different sources in different mass regions. Both mass and pT spectra are compared to recent theoretical predictions.
id cern-1009254
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2007
record_format invenio
spelling cern-10092542023-03-12T04:30:36Zdoi:10.1016/j.nuclphysa.2006.11.015http://cds.cern.ch/record/1009254engDamjanovic, S.Arnaldi, R.Averbeck, R.Banicz, K.Castor, J.chaurand, B.Cicalo, C.Colla, A.Cortese, P.David, AndreDe Falco, A.Devaux, A.Drees, A.Ducroux, L.En'yo, H.Ferretti, A.Floris, M.Forster, A.Force, P.Guettet, N.Guichard, A.Gulkanian, H.Heuser, J.Keil, M.Kluberg, L.Lourenco, C.Lozano, J.Manso, F.Masoni, A.Martins, P.Neves, A.Ohnishi, H.Oppedisano, C.Parracho, P.Pillot, P.Puddu, G.Radermacher, E.Ramalhete, P.Rosinsky, P.Scomparin, E.Seixas, J.Serci, S.Shahoyan, R.Sonderegger, P.Specht, H.J.Tieulent, R.Usai, G.Veenhof, R.Wohri, H.K.NA60 results on the rho spectral function in In-In collisionsNuclear Physics - ExperimentThe NA60 experiment at the CERN SPS has studied low-mass muon pairs in 158 AGeV In-In collisions. A strong excess of pairs is observed above the yield expected from neutral meson decays. After subtraction of the decay sources, the shape of the resulting mass spectrum is largely consistent with a dominant contribution from pi+pi- -> rho -> mu+mu- annihilation. The associated rho spectral function exhibits considerable broadening, but essentially no shift in mass. The acceptance-corrected pT spectra have a shape atypical for radial flow. They also significantly depend on mass, pointing to different sources in different mass regions. Both mass and pT spectra are compared to recent theoretical predictions.The NA60 experiment at the CERN SPS has studied low-mass muon pairs in 158 AGeV In-In collisions. A strong excess of pairs is observed above the yield expected from neutral meson decays. After subtraction of the decay sources, the shape of the resulting mass spectrum is largely consistent with a dominant contribution from π + π − → ρ → μ + μ − annihilation. The associated ρ spectral function exhibits considerable broadening, but essentially no shift in mass. The acceptance-corrected p T spectra have a shape atypical for radial flow. They also significantly depend on mass, pointing to different sources in different mass regions. Both mass and p T spectra are compared to recent theoretical predictions.The NA60 experiment at the CERN SPS has studied low-mass muon pairs in 158 AGeV In-In collisions. A strong excess of pairs is observed above the yield expected from neutral meson decays. After subtraction of the decay sources, the shape of the resulting mass spectrum is largely consistent with a dominant contribution from pi+pi- -> rho -> mu+mu- annihilation. The associated rho spectral function exhibits considerable broadening, but essentially no shift in mass. The acceptance-corrected pT spectra have a shape atypical for radial flow. They also significantly depend on mass, pointing to different sources in different mass regions. Both mass and pT spectra are compared to recent theoretical predictions.nucl-ex/0701015oai:cds.cern.ch:10092542007-01-08
spellingShingle Nuclear Physics - Experiment
Damjanovic, S.
Arnaldi, R.
Averbeck, R.
Banicz, K.
Castor, J.
chaurand, B.
Cicalo, C.
Colla, A.
Cortese, P.
David, Andre
De Falco, A.
Devaux, A.
Drees, A.
Ducroux, L.
En'yo, H.
Ferretti, A.
Floris, M.
Forster, A.
Force, P.
Guettet, N.
Guichard, A.
Gulkanian, H.
Heuser, J.
Keil, M.
Kluberg, L.
Lourenco, C.
Lozano, J.
Manso, F.
Masoni, A.
Martins, P.
Neves, A.
Ohnishi, H.
Oppedisano, C.
Parracho, P.
Pillot, P.
Puddu, G.
Radermacher, E.
Ramalhete, P.
Rosinsky, P.
Scomparin, E.
Seixas, J.
Serci, S.
Shahoyan, R.
Sonderegger, P.
Specht, H.J.
Tieulent, R.
Usai, G.
Veenhof, R.
Wohri, H.K.
NA60 results on the rho spectral function in In-In collisions
title NA60 results on the rho spectral function in In-In collisions
title_full NA60 results on the rho spectral function in In-In collisions
title_fullStr NA60 results on the rho spectral function in In-In collisions
title_full_unstemmed NA60 results on the rho spectral function in In-In collisions
title_short NA60 results on the rho spectral function in In-In collisions
title_sort na60 results on the rho spectral function in in-in collisions
topic Nuclear Physics - Experiment
url https://dx.doi.org/10.1016/j.nuclphysa.2006.11.015
http://cds.cern.ch/record/1009254
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