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First measurement of the $\rho$ spectral function in nuclear collisions
The NA60 experiment has studied low-mass muon pairs in 158 AGeV Indium-Indium collisions at the CERN SPS. A strong excess of pairs is observed above the expectation from neutral meson decays. The unprecedented sample size of 360 000 events and the good mass resolution of about 2% allow to isolate th...
| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2005
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/j.nuclphysa.2006.06.121 http://cds.cern.ch/record/896469 |
| _version_ | 1780908609770618880 |
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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. Enyo, H. Ferretti, A. Floris, M. 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. Woehri, 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. Enyo, H. Ferretti, A. Floris, M. 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. Woehri, H.K. |
| author_sort | Damjanovic, S. |
| collection | CERN |
| description | The NA60 experiment has studied low-mass muon pairs in 158 AGeV Indium-Indium collisions at the CERN SPS. A strong excess of pairs is observed above the expectation from neutral meson decays. The unprecedented sample size of 360 000 events and the good mass resolution of about 2% allow to isolate the excess by subtraction of the known sources. The shape of the resulting mass spectrum is consistent with a dominant contribution from pi+ pi- -> rho -> mu+ mu- annihilation. The associated rho spectral function shows a strong broadening, but essentially no shift in mass. |
| id | cern-896469 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2005 |
| record_format | invenio |
| spelling | cern-8964692023-03-14T20:08:08Zdoi:10.1016/j.nuclphysa.2006.06.121http://cds.cern.ch/record/896469engDamjanovic, 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.Enyo, H.Ferretti, A.Floris, M.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.Woehri, H.K.First measurement of the $\rho$ spectral function in nuclear collisionsNuclear Physics - ExperimentThe NA60 experiment has studied low-mass muon pairs in 158 AGeV Indium-Indium collisions at the CERN SPS. A strong excess of pairs is observed above the expectation from neutral meson decays. The unprecedented sample size of 360 000 events and the good mass resolution of about 2% allow to isolate the excess by subtraction of the known sources. The shape of the resulting mass spectrum is consistent with a dominant contribution from pi+ pi- -> rho -> mu+ mu- annihilation. The associated rho spectral function shows a strong broadening, but essentially no shift in mass.The NA60 experiment has studied low-mass muon pairs in 158 AGeV Indium-Indium collisions at the CERN SPS. A strong excess of pairs is observed above the expectation from neutral meson decays. The unprecedented sample size of 360 000 events and the good mass resolution of about 2% allow to isolate the excess by subtraction of the known sources. The shape of the resulting mass spectrum is consistent with a dominant contribution from pi+ pi- -> rho -> mu+ mu- annihilation. The associated rho spectral function shows a strong broadening, but essentially no shift in mass.The NA60 experiment has studied low-mass muon pairs in 158 AGeV Indium-Indium collisions at the CERN SPS. A strong excess of pairs is observed above the expectation from neutral meson decays. The unprecedented sample size of 360 000 events and the good mass resolution of about 2% allow to isolate the excess by subtraction of the known sources. The shape of the resulting mass spectrum is consistent with a dominant contribution from π + π − → ρ → μ + μ − annihilation. The associated ρ spectral function shows a strong broadening, but essentially no shift in mass.nucl-ex/0510044oai:cds.cern.ch:8964692005-10-13 |
| 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. Enyo, H. Ferretti, A. Floris, M. 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. Woehri, H.K. First measurement of the $\rho$ spectral function in nuclear collisions |
| title | First measurement of the $\rho$ spectral function in nuclear collisions |
| title_full | First measurement of the $\rho$ spectral function in nuclear collisions |
| title_fullStr | First measurement of the $\rho$ spectral function in nuclear collisions |
| title_full_unstemmed | First measurement of the $\rho$ spectral function in nuclear collisions |
| title_short | First measurement of the $\rho$ spectral function in nuclear collisions |
| title_sort | first measurement of the $\rho$ spectral function in nuclear collisions |
| topic | Nuclear Physics - Experiment |
| url | https://dx.doi.org/10.1016/j.nuclphysa.2006.06.121 http://cds.cern.ch/record/896469 |
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