Study of dielectron production in C + C collisions at 1 A   GeV

G. Agakishiev; C. Agodi; H. Alvarez-Pol; A. Balanda; R. Bassini; G. Bellia; D. Belver; A. Belyaev; A. Blanco; M. Böhmer; A. Bortolotti; J. L. Boyard; P. Braun-Munzinger; P. Cabanelas; E. Castro; S. Chernenko; T. Christ; M. Destefanis; J. Díaz; F. Dohrmann; A. Dybczak; T. Eberl; L. Fabbietti; O. Fateev; P. Finocchiaro; P. Fonte; J. Friese; I. Fröhlich; T. Galatyuk; J. A. Garzón; R. Gernhäuser; A. Gil; C. Gilardi; M. Golubeva; D. González-Díaz; E. Grosse; F. Guber; M. Heilmann; T. Heinz; T. Hennino; R. Holzmann; A. Ierusalimov; I. Iori; A. Ivashkin; M. Jurkovic; B. Kämpfer; M. Kajetanowicz; K. Kanaki; T. Karavicheva; D. Kirschner; I. Koenig; W. Koenig; B. W. Kolb; R. Kotte; A. Kozuch; A. Krása; F. Krizek; R. Krücken; W. Kühn; A. Kugler; A. Kurepin; J. Lamas-Valverde; S. Lang; J. S. Lange; K. Lapidus; L. Lopes; L. Maier; A. Mangiarotti; J. Marín; J. Markert; V. Metag; B. Michalska; D. Mishra; E. Morinière; J. Mousa; M. Münch; C. Müntz; L. Naumann; R. Novotny; J. Otwinowski; Y. C. Pachmayer; M. Palka; Y. Parpottas; V. Pechenov; O. Pechenova; T. Pérez Cavalcanti; J. Pietraszko; R. Pleskac; V. Pospísil; W. Przygoda; B. Ramstein; A. Reshetin; M. Roy-Stephan; A. Rustamov; A. Sadovsky; B. Sailer; P. Salabura; A. Schmah; C. Schroeder; E. Schwab; R. S. Simon; Yu G. Sobolev; S. Spataro; B. Spruck; H. Ströbele; J. Stroth; C. Sturm; M. Sudol; A. Tarantola; K. Teilab; P. Tlusty; A. Toia; M. Traxler; R. Trebacz; H. Tsertos; I. Veretenkin; V. Wagner; M. Weber; H. Wen; M. Wisniowski; T. Wojcik; J. Wüstenfeld; S. Yurevich; Y. Zanevsky; P. Zhou; P. Zumbruch

doi:10.1016/j.physletb.2008.03.062

Study of dielectron production in C + C collisions at 1 A GeV

G. Agakishiev, C. Agodi, H. Alvarez-Pol, A. Balanda, R. Bassini, G. Bellia, D. Belver, A. Belyaev, A. Blanco, M. Böhmer, A. Bortolotti, J. L. Boyard, P. Braun-Munzinger, P. Cabanelas, E. Castro, S. Chernenko, T. Christ, M. Destefanis, J. Díaz, F. DohrmannA. Dybczak, T. Eberl, L. Fabbietti, O. Fateev, P. Finocchiaro, P. Fonte, J. Friese, I. Fröhlich, T. Galatyuk, J. A. Garzón, R. Gernhäuser, A. Gil, C. Gilardi, M. Golubeva, D. González-Díaz, E. Grosse, F. Guber, M. Heilmann, T. Heinz, T. Hennino, R. Holzmann, A. Ierusalimov, I. Iori, A. Ivashkin, M. Jurkovic, B. Kämpfer, M. Kajetanowicz, K. Kanaki, T. Karavicheva, D. Kirschner, I. Koenig, W. Koenig, B. W. Kolb, R. Kotte, A. Kozuch, A. Krása, F. Krizek, R. Krücken, W. Kühn, A. Kugler, A. Kurepin, J. Lamas-Valverde, S. Lang, J. S. Lange, K. Lapidus, L. Lopes, L. Maier, A. Mangiarotti, J. Marín, J. Markert, V. Metag, B. Michalska, D. Mishra, E. Morinière, J. Mousa, M. Münch, C. Müntz, L. Naumann, R. Novotny, J. Otwinowski, Y. C. Pachmayer, M. Palka, Y. Parpottas, V. Pechenov, O. Pechenova, T. Pérez Cavalcanti, J. Pietraszko, R. Pleskac, V. Pospísil, W. Przygoda, B. Ramstein, A. Reshetin, M. Roy-Stephan, A. Rustamov, A. Sadovsky, B. Sailer, P. Salabura, A. Schmah, C. Schroeder, E. Schwab, R. S. Simon, Yu G. Sobolev, S. Spataro, B. Spruck, H. Ströbele, J. Stroth, C. Sturm, M. Sudol, A. Tarantola, K. Teilab, P. Tlusty, A. Toia, M. Traxler, R. Trebacz, H. Tsertos, I. Veretenkin, V. Wagner, M. Weber, H. Wen, M. Wisniowski, T. Wojcik, J. Wüstenfeld, S. Yurevich, Y. Zanevsky, P. Zhou, P. Zumbruch

Chair of Experimentalphysik - Dense and Strange Hadronic Matter

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

95 Scopus citations

Abstract

The emission of e⁺ e^- pairs from C + C collisions at an incident energy of 1 GeV per nucleon has been investigated. The measured production probabilities, spanning from the π⁰-Dalitz to the ρ / ω invariant-mass region, display a strong excess above the cocktail of standard hadronic sources. The bombarding-energy dependence of this excess is found to scale like pion production, rather than like eta production. The data are in good agreement with results obtained in the former DLS experiment.

Original language	English
Pages (from-to)	43-48
Number of pages	6
Journal	Physics Letters B
Volume	663
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physletb.2008.03.062
State	Published - 15 May 2008

Keywords

DLS puzzle
Dilepton spectroscopy
Excess yield
Excitation function
Heavy-ion reactions

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10.1016/j.physletb.2008.03.062

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Agakishiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Bassini, R., Bellia, G., Belver, D., Belyaev, A., Blanco, A., Böhmer, M., Bortolotti, A., Boyard, J. L., Braun-Munzinger, P., Cabanelas, P., Castro, E., Chernenko, S., Christ, T., Destefanis, M., Díaz, J., ... Zumbruch, P. (2008). Study of dielectron production in C + C collisions at 1 A GeV. Physics Letters B, 663(1-2), 43-48. https://doi.org/10.1016/j.physletb.2008.03.062

@article{263f46c185d446b1bd085f43f9a6e91c,

title = "Study of dielectron production in C + C collisions at 1 A GeV",

abstract = "The emission of e+ e- pairs from C + C collisions at an incident energy of 1 GeV per nucleon has been investigated. The measured production probabilities, spanning from the π0-Dalitz to the ρ / ω invariant-mass region, display a strong excess above the cocktail of standard hadronic sources. The bombarding-energy dependence of this excess is found to scale like pion production, rather than like eta production. The data are in good agreement with results obtained in the former DLS experiment.",

keywords = "DLS puzzle, Dilepton spectroscopy, Excess yield, Excitation function, Heavy-ion reactions",

author = "G. Agakishiev and C. Agodi and H. Alvarez-Pol and A. Balanda and R. Bassini and G. Bellia and D. Belver and A. Belyaev and A. Blanco and M. B{\"o}hmer and A. Bortolotti and Boyard, {J. L.} and P. Braun-Munzinger and P. Cabanelas and E. Castro and S. Chernenko and T. Christ and M. Destefanis and J. D{\'i}az and F. Dohrmann and A. Dybczak and T. Eberl and L. Fabbietti and O. Fateev and P. Finocchiaro and P. Fonte and J. Friese and I. Fr{\"o}hlich and T. Galatyuk and Garz{\'o}n, {J. A.} and R. Gernh{\"a}user and A. Gil and C. Gilardi and M. Golubeva and D. Gonz{\'a}lez-D{\'i}az and E. Grosse and F. Guber and M. Heilmann and T. Heinz and T. Hennino and R. Holzmann and A. Ierusalimov and I. Iori and A. Ivashkin and M. Jurkovic and B. K{\"a}mpfer and M. Kajetanowicz and K. Kanaki and T. Karavicheva and D. Kirschner and I. Koenig and W. Koenig and Kolb, {B. W.} and R. Kotte and A. Kozuch and A. Kr{\'a}sa and F. Krizek and R. Kr{\"u}cken and W. K{\"u}hn and A. Kugler and A. Kurepin and J. Lamas-Valverde and S. Lang and Lange, {J. S.} and K. Lapidus and L. Lopes and L. Maier and A. Mangiarotti and J. Mar{\'i}n and J. Markert and V. Metag and B. Michalska and D. Mishra and E. Morini{\`e}re and J. Mousa and M. M{\"u}nch and C. M{\"u}ntz and L. Naumann and R. Novotny and J. Otwinowski and Pachmayer, {Y. C.} and M. Palka and Y. Parpottas and V. Pechenov and O. Pechenova and {P{\'e}rez Cavalcanti}, T. and J. Pietraszko and R. Pleskac and V. Posp{\'i}sil and W. Przygoda and B. Ramstein and A. Reshetin and M. Roy-Stephan and A. Rustamov and A. Sadovsky and B. Sailer and P. Salabura and A. Schmah and C. Schroeder and E. Schwab and Simon, {R. S.} and Sobolev, {Yu G.} and S. Spataro and B. Spruck and H. Str{\"o}bele and J. Stroth and C. Sturm and M. Sudol and A. Tarantola and K. Teilab and P. Tlusty and A. Toia and M. Traxler and R. Trebacz and H. Tsertos and I. Veretenkin and V. Wagner and M. Weber and H. Wen and M. Wisniowski and T. Wojcik and J. W{\"u}stenfeld and S. Yurevich and Y. Zanevsky and P. Zhou and P. Zumbruch",

note = "Funding Information: We thank H.W. Matis (LBNL) for valuable clarifications on the DLS experiment. The collaboration gratefully acknowledges the support by BMBF grants 06MT238, 06GI146I, 06F-171, and 06DR135 (Germany), by the DFG cluster of excellence Origin and Structure of the Universe ( www.universe-cluster.de ), by GSI (TM-FR1, GI/ME3, OF/STROE), by grants GA ASCR IAA1048304, GA CR 202/00/1668 and MSMT LC7050 (Czech Republic), by grant KBN 1P03B 056 29 (Poland), by INFN (Italy), by CNRS/IN2P3 (France), by grants MCYT FPA2000-2041-C02-02 and XUGA PGID T02PXIC20605PN (Spain), by grant UCY-10.3.11.12 (Cyprus), by INTAS grant 03-51-3208 and by EU contract RII3-CT-2004-506078.",

year = "2008",

month = may,

day = "15",

doi = "10.1016/j.physletb.2008.03.062",

language = "English",

volume = "663",

pages = "43--48",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

number = "1-2",

}

Agakishiev, G, Agodi, C, Alvarez-Pol, H, Balanda, A, Bassini, R, Bellia, G, Belver, D, Belyaev, A, Blanco, A, Böhmer, M, Bortolotti, A, Boyard, JL, Braun-Munzinger, P, Cabanelas, P, Castro, E, Chernenko, S, Christ, T, Destefanis, M, Díaz, J, Dohrmann, F, Dybczak, A, Eberl, T, Fabbietti, L, Fateev, O, Finocchiaro, P, Fonte, P, Friese, J, Fröhlich, I, Galatyuk, T, Garzón, JA, Gernhäuser, R, Gil, A, Gilardi, C, Golubeva, M, González-Díaz, D, Grosse, E, Guber, F, Heilmann, M, Heinz, T, Hennino, T, Holzmann, R, Ierusalimov, A, Iori, I, Ivashkin, A, Jurkovic, M, Kämpfer, B, Kajetanowicz, M, Kanaki, K, Karavicheva, T, Kirschner, D, Koenig, I, Koenig, W, Kolb, BW, Kotte, R, Kozuch, A, Krása, A, Krizek, F, Krücken, R, Kühn, W, Kugler, A, Kurepin, A, Lamas-Valverde, J, Lang, S, Lange, JS, Lapidus, K, Lopes, L, Maier, L, Mangiarotti, A, Marín, J, Markert, J, Metag, V, Michalska, B, Mishra, D, Morinière, E, Mousa, J, Münch, M, Müntz, C, Naumann, L, Novotny, R, Otwinowski, J, Pachmayer, YC, Palka, M, Parpottas, Y, Pechenov, V, Pechenova, O, Pérez Cavalcanti, T, Pietraszko, J, Pleskac, R, Pospísil, V, Przygoda, W, Ramstein, B, Reshetin, A, Roy-Stephan, M, Rustamov, A, Sadovsky, A, Sailer, B, Salabura, P, Schmah, A, Schroeder, C, Schwab, E, Simon, RS, Sobolev, YG, Spataro, S, Spruck, B, Ströbele, H, Stroth, J, Sturm, C, Sudol, M, Tarantola, A, Teilab, K, Tlusty, P, Toia, A, Traxler, M, Trebacz, R, Tsertos, H, Veretenkin, I, Wagner, V, Weber, M, Wen, H, Wisniowski, M, Wojcik, T, Wüstenfeld, J, Yurevich, S, Zanevsky, Y, Zhou, P & Zumbruch, P 2008, 'Study of dielectron production in C + C collisions at 1 A GeV', Physics Letters B, vol. 663, no. 1-2, pp. 43-48. https://doi.org/10.1016/j.physletb.2008.03.062

TY - JOUR

T1 - Study of dielectron production in C + C collisions at 1 A GeV

AU - Agakishiev, G.

AU - Agodi, C.

AU - Alvarez-Pol, H.

AU - Balanda, A.

AU - Bassini, R.

AU - Bellia, G.

AU - Belver, D.

AU - Belyaev, A.

AU - Blanco, A.

AU - Böhmer, M.

AU - Bortolotti, A.

AU - Boyard, J. L.

AU - Braun-Munzinger, P.

AU - Cabanelas, P.

AU - Castro, E.

AU - Chernenko, S.

AU - Christ, T.

AU - Destefanis, M.

AU - Díaz, J.

AU - Dohrmann, F.

AU - Dybczak, A.

AU - Eberl, T.

AU - Fabbietti, L.

AU - Fateev, O.

AU - Finocchiaro, P.

AU - Fonte, P.

AU - Friese, J.

AU - Fröhlich, I.

AU - Galatyuk, T.

AU - Garzón, J. A.

AU - Gernhäuser, R.

AU - Gil, A.

AU - Gilardi, C.

AU - Golubeva, M.

AU - González-Díaz, D.

AU - Grosse, E.

AU - Guber, F.

AU - Heilmann, M.

AU - Heinz, T.

AU - Hennino, T.

AU - Holzmann, R.

AU - Ierusalimov, A.

AU - Iori, I.

AU - Ivashkin, A.

AU - Jurkovic, M.

AU - Kämpfer, B.

AU - Kajetanowicz, M.

AU - Kanaki, K.

AU - Karavicheva, T.

AU - Kirschner, D.

AU - Koenig, I.

AU - Koenig, W.

AU - Kolb, B. W.

AU - Kotte, R.

AU - Kozuch, A.

AU - Krása, A.

AU - Krizek, F.

AU - Krücken, R.

AU - Kühn, W.

AU - Kugler, A.

AU - Kurepin, A.

AU - Lamas-Valverde, J.

AU - Lang, S.

AU - Lange, J. S.

AU - Lapidus, K.

AU - Lopes, L.

AU - Maier, L.

AU - Mangiarotti, A.

AU - Marín, J.

AU - Markert, J.

AU - Metag, V.

AU - Michalska, B.

AU - Mishra, D.

AU - Morinière, E.

AU - Mousa, J.

AU - Münch, M.

AU - Müntz, C.

AU - Naumann, L.

AU - Novotny, R.

AU - Otwinowski, J.

AU - Pachmayer, Y. C.

AU - Palka, M.

AU - Parpottas, Y.

AU - Pechenov, V.

AU - Pechenova, O.

AU - Pérez Cavalcanti, T.

AU - Pietraszko, J.

AU - Pleskac, R.

AU - Pospísil, V.

AU - Przygoda, W.

AU - Ramstein, B.

AU - Reshetin, A.

AU - Roy-Stephan, M.

AU - Rustamov, A.

AU - Sadovsky, A.

AU - Sailer, B.

AU - Salabura, P.

AU - Schmah, A.

AU - Schroeder, C.

AU - Schwab, E.

AU - Simon, R. S.

AU - Sobolev, Yu G.

AU - Spataro, S.

AU - Spruck, B.

AU - Ströbele, H.

AU - Stroth, J.

AU - Sturm, C.

AU - Sudol, M.

AU - Tarantola, A.

AU - Teilab, K.

AU - Tlusty, P.

AU - Toia, A.

AU - Traxler, M.

AU - Trebacz, R.

AU - Tsertos, H.

AU - Veretenkin, I.

AU - Wagner, V.

AU - Weber, M.

AU - Wen, H.

AU - Wisniowski, M.

AU - Wojcik, T.

AU - Wüstenfeld, J.

AU - Yurevich, S.

AU - Zanevsky, Y.

AU - Zhou, P.

AU - Zumbruch, P.

N1 - Funding Information: We thank H.W. Matis (LBNL) for valuable clarifications on the DLS experiment. The collaboration gratefully acknowledges the support by BMBF grants 06MT238, 06GI146I, 06F-171, and 06DR135 (Germany), by the DFG cluster of excellence Origin and Structure of the Universe ( www.universe-cluster.de ), by GSI (TM-FR1, GI/ME3, OF/STROE), by grants GA ASCR IAA1048304, GA CR 202/00/1668 and MSMT LC7050 (Czech Republic), by grant KBN 1P03B 056 29 (Poland), by INFN (Italy), by CNRS/IN2P3 (France), by grants MCYT FPA2000-2041-C02-02 and XUGA PGID T02PXIC20605PN (Spain), by grant UCY-10.3.11.12 (Cyprus), by INTAS grant 03-51-3208 and by EU contract RII3-CT-2004-506078.

PY - 2008/5/15

Y1 - 2008/5/15

N2 - The emission of e+ e- pairs from C + C collisions at an incident energy of 1 GeV per nucleon has been investigated. The measured production probabilities, spanning from the π0-Dalitz to the ρ / ω invariant-mass region, display a strong excess above the cocktail of standard hadronic sources. The bombarding-energy dependence of this excess is found to scale like pion production, rather than like eta production. The data are in good agreement with results obtained in the former DLS experiment.

AB - The emission of e+ e- pairs from C + C collisions at an incident energy of 1 GeV per nucleon has been investigated. The measured production probabilities, spanning from the π0-Dalitz to the ρ / ω invariant-mass region, display a strong excess above the cocktail of standard hadronic sources. The bombarding-energy dependence of this excess is found to scale like pion production, rather than like eta production. The data are in good agreement with results obtained in the former DLS experiment.

KW - DLS puzzle

KW - Dilepton spectroscopy

KW - Excess yield

KW - Excitation function

KW - Heavy-ion reactions

UR - http://www.scopus.com/inward/record.url?scp=42749093273&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2008.03.062

DO - 10.1016/j.physletb.2008.03.062

M3 - Article

AN - SCOPUS:42749093273

SN - 0370-2693

VL - 663

SP - 43

EP - 48

JO - Physics Letters B

JF - Physics Letters B

IS - 1-2

ER -

Study of dielectron production in C + C collisions at 1 A GeV

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Keywords

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