First measurement of the ρ spectral function in nuclear collisions

S. Damjanovic; R. Arnaldi; R. Averbeck; K. Banicz; J. Castor; B. Chaurand; C. Cicalò; A. Colla; P. Cortese; S. Damjanovic; A. David; A. De Falco; A. Devaux; A. Drees; L. Ducroux; H. En'yo; A. Ferretti; M. Floris; P. Force; N. Guettet; A. Guichard; H. Gulkanian; J. Heuser; M. Keil; L. Kluberg; C. Lourenço; J. Lozano; F. Manso; A. Masoni; P. Martins; A. Neves; H. Ohnishi; C. Oppedisano; P. Parracho; P. Pillot; G. Puddu; E. Radermacher; P. Ramalhete; P. Rosinsky; E. Scomparin; J. Seixas; S. Serci; R. Shahoyan; P. Sonderegger; H. J. Specht; R. Tieulent; G. Usai; R. Veenhof; H. K. Wöhri

doi:10.1016/j.nuclphysa.2006.06.121

First measurement of the ρ spectral function in nuclear collisions

S. Damjanovic
, R. Arnaldi
, R. Averbeck
, K. Banicz
, J. Castor
, B. Chaurand
, C. Cicalò
, A. Colla
, P. Cortese
, S. Damjanovic
, A. David
, A. De Falco
, A. Devaux
, A. Drees
, L. Ducroux
, H. En'yo
, A. Ferretti
, M. Floris
, P. Force
, N. Guettet

A. Guichard, H. Gulkanian, J. Heuser, M. Keil, L. Kluberg, C. Lourenço, J. Lozano, F. Manso, A. Masoni, P. Martins, A. Neves, H. Ohnishi, C. Oppedisano, P. Parracho, P. Pillot, G. Puddu, E. Radermacher, P. Ramalhete, P. Rosinsky, E. Scomparin, J. Seixas, S. Serci, R. Shahoyan, P. Sonderegger, H. J. Specht, R. Tieulent, G. Usai, R. Veenhof, H. K. Wöhri

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	715-718
Number of pages	4
Journal	Nuclear Physics A
Volume	774
Issue number	1-4
DOIs	https://doi.org/10.1016/j.nuclphysa.2006.06.121
Publication status	Published - 7 Aug 2006
Externally published	Yes

Access to Document

10.1016/j.nuclphysa.2006.06.121

Cite this

Damjanovic, S., Arnaldi, R., Averbeck, R., Banicz, K., Castor, J., Chaurand, B., Cicalò, C., Colla, A., Cortese, P., Damjanovic, S., David, A., De Falco, A., Devaux, A., Drees, A., Ducroux, L., En'yo, H., Ferretti, A., Floris, M., Force, P., ... Wöhri, H. K. (2006). First measurement of the ρ spectral function in nuclear collisions. Nuclear Physics A, 774(1-4), 715-718. https://doi.org/10.1016/j.nuclphysa.2006.06.121

@article{75a77a6dafd54cdfaf6014fb3f5e44ba,

title = "First measurement of the ρ spectral function in nuclear collisions",

abstract = "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.",

author = "S. Damjanovic and R. Arnaldi and R. Averbeck and K. Banicz and J. Castor and B. Chaurand and C. Cical{\`o} and A. Colla and P. Cortese and S. Damjanovic and A. David and \{De Falco\}, A. and A. Devaux and A. Drees and L. Ducroux and H. En'yo and A. Ferretti and M. Floris and P. Force and N. Guettet and A. Guichard and H. Gulkanian and J. Heuser and M. Keil and L. Kluberg and C. Louren{\c c}o and J. Lozano and F. Manso and A. Masoni and P. Martins and A. Neves and H. Ohnishi and C. Oppedisano and P. Parracho and P. Pillot and G. Puddu and E. Radermacher and P. Ramalhete and P. Rosinsky and E. Scomparin and J. Seixas and S. Serci and R. Shahoyan and P. Sonderegger and Specht, \{H. J.\} and R. Tieulent and G. Usai and R. Veenhof and W{\"o}hri, \{H. K.\}",

year = "2006",

month = aug,

day = "7",

doi = "10.1016/j.nuclphysa.2006.06.121",

language = "English",

volume = "774",

pages = "715--718",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier BV",

number = "1-4",

}

Damjanovic, S, Arnaldi, R, Averbeck, R, Banicz, K, Castor, J, Chaurand, B, Cicalò, C, Colla, A, Cortese, P, Damjanovic, S, David, A, De Falco, A, Devaux, A, Drees, A, Ducroux, L, En'yo, H, Ferretti, A, Floris, M, Force, P, Guettet, N, Guichard, A, Gulkanian, H, Heuser, J, Keil, M, Kluberg, L, Lourenço, 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, HJ, Tieulent, R, Usai, G, Veenhof, R & Wöhri, HK 2006, 'First measurement of the ρ spectral function in nuclear collisions', Nuclear Physics A, vol. 774, no. 1-4, pp. 715-718. https://doi.org/10.1016/j.nuclphysa.2006.06.121

TY - JOUR

T1 - First measurement of the ρ spectral function in nuclear collisions

AU - Damjanovic, S.

AU - Arnaldi, R.

AU - Averbeck, R.

AU - Banicz, K.

AU - Castor, J.

AU - Chaurand, B.

AU - Cicalò, C.

AU - Colla, A.

AU - Cortese, P.

AU - Damjanovic, S.

AU - David, A.

AU - De Falco, A.

AU - Devaux, A.

AU - Drees, A.

AU - Ducroux, L.

AU - En'yo, H.

AU - Ferretti, A.

AU - Floris, M.

AU - Force, P.

AU - Guettet, N.

AU - Guichard, A.

AU - Gulkanian, H.

AU - Heuser, J.

AU - Keil, M.

AU - Kluberg, L.

AU - Lourenço, C.

AU - Lozano, J.

AU - Manso, F.

AU - Masoni, A.

AU - Martins, P.

AU - Neves, A.

AU - Ohnishi, H.

AU - Oppedisano, C.

AU - Parracho, P.

AU - Pillot, P.

AU - Puddu, G.

AU - Radermacher, E.

AU - Ramalhete, P.

AU - Rosinsky, P.

AU - Scomparin, E.

AU - Seixas, J.

AU - Serci, S.

AU - Shahoyan, R.

AU - Sonderegger, P.

AU - Specht, H. J.

AU - Tieulent, R.

AU - Usai, G.

AU - Veenhof, R.

AU - Wöhri, H. K.

PY - 2006/8/7

Y1 - 2006/8/7

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/33845408494

U2 - 10.1016/j.nuclphysa.2006.06.121

DO - 10.1016/j.nuclphysa.2006.06.121

M3 - Article

SN - 0375-9474

VL - 774

SP - 715

EP - 718

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 1-4

ER -

First measurement of the ρ spectral function in nuclear collisions

Abstract

Access to Document

Other files and links

Fingerprint

Cite this