Inclusive dielectron spectra in p+p collisions at 3.5 GeV kinetic beam energy

G. Agakishiev; A. Balanda; D. Belver; A. Belyaev; A. Blanco; M. Böhmer; J. L. Boyard; P. Cabanelas; E. Castro; J. C. Chen; S. Chernenko; T. Christ; M. Destefanis; F. Dohrmann; A. Dybczak; E. Epple; L. Fabbietti; O. Fateev; P. Finocchiaro; P. Fonte; J. Friese; I. Fröhlich; T. Galatyuk; J. A. Garzón; R. Gernhäuser; C. Gilardi; M. Golubeva; D. González-Díaz; F. Guber; M. Gumberidze; T. Heinz; T. Hennino; R. Holzmann; A. Ierusalimov; I. Iori; A. Ivashkin; M. Jurkovic; B. Kämpfer; K. Kanaki; T. Karavicheva; I. Koenig; W. Koenig; B. W. Kolb; R. Kotte; A. Krása; F. Krizek; R. Krücken; H. Kuc; W. Kühn; A. Kugler; A. Kurepin; R. Lalik; S. Lang; J. S. Lange; K. Lapidus; T. Liu; L. Lopes; M. Lorenz; L. Maier; A. Mangiarotti; J. Markert; V. Metag; B. Michalska; J. Michel; E. Morinière; J. Mousa; C. Müntz; L. Naumann; J. Otwinowski; Y. C. Pachmayer; M. Palka; Y. Parpottas; V. Pechenov; O. Pechenova; J. Pietraszko; W. Przygoda; B. Ramstein; A. Reshetin; A. Rustamov; A. Sadovsky; P. Salabura; A. Schmah; E. Schwab; J. Siebenson; Yu G. Sobolev; S. Spataro; B. Spruck; H. Ströbele; J. Stroth; C. Sturm; A. Tarantola; K. Teilab; P. Tlusty; M. Traxler; R. Trebacz; H. Tsertos; V. Wagner; M. Weber; C. Wendisch; J. Wüstenfeld; S. Yurevich; Y. Zanevsky

doi:10.1140/epja/i2012-12064-y

Inclusive dielectron spectra in p+p collisions at 3.5 GeV kinetic beam energy

G. Agakishiev
, A. Balanda
, D. Belver
, A. Belyaev
, A. Blanco
, M. Böhmer
, J. L. Boyard
, P. Cabanelas
, E. Castro
, J. C. Chen
, S. Chernenko
, T. Christ
, M. Destefanis
, F. Dohrmann
, A. Dybczak
, E. Epple
, L. Fabbietti
, O. Fateev
, P. Finocchiaro
, P. Fonte

J. Friese, I. Fröhlich, T. Galatyuk, J. A. Garzón, R. Gernhäuser, C. Gilardi, M. Golubeva, D. González-Díaz, F. Guber, M. Gumberidze, T. Heinz, T. Hennino, R. Holzmann, A. Ierusalimov, I. Iori, A. Ivashkin, M. Jurkovic, B. Kämpfer, K. Kanaki, T. Karavicheva, I. Koenig, W. Koenig, B. W. Kolb, R. Kotte, A. Krása, F. Krizek, R. Krücken, H. Kuc, W. Kühn, A. Kugler, A. Kurepin, R. Lalik, S. Lang, J. S. Lange, K. Lapidus, T. Liu, L. Lopes, M. Lorenz, L. Maier, A. Mangiarotti, J. Markert, V. Metag, B. Michalska, J. Michel, E. Morinière, J. Mousa, C. Müntz, L. Naumann, J. Otwinowski, Y. C. Pachmayer, M. Palka, Y. Parpottas, V. Pechenov, O. Pechenova, J. Pietraszko, W. Przygoda, B. Ramstein, A. Reshetin, A. Rustamov, A. Sadovsky, P. Salabura, A. Schmah, E. Schwab, J. Siebenson, Yu G. Sobolev, S. Spataro, B. Spruck, H. Ströbele, J. Stroth, C. Sturm, A. Tarantola, K. Teilab, P. Tlusty, M. Traxler, R. Trebacz, H. Tsertos, V. Wagner, M. Weber, C. Wendisch, J. Wüstenfeld, S. Yurevich, Y. Zanevsky

Joint Inst. for Nuclear Research
Jagiellonian University
Universidad de Santiago de Compostela
LIP-Laboratorio de Instrumentacao e Fisica Experimental de Particulas
Technical University of Munich
CNRS/IN2P3 and Université Paris 11
Cluster of Excellence E-conversion
Justus-Liebig-Universität Gießen
HelmholtzZentrum Dresden-Rossendorf
Laboratori Nazionali Del Sud
Coimbra Polytechnic - ISEC
Johann Wolfgang Goethe University
GSI Helmholtz Center
Institute for Nuclear Research of the Russian Academy of Sciences
Technische Universität Darmstadt
INFN Sezione di Milano
University of Milan
Technische Universität Dresden
Nuclear Physics Institute of the Cas
University of Cyprus
Frederick University
Lawrence Berkeley National Laboratory
University of Torino

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

68 Scopus citations

Abstract

We present the inclusive invariant mass, transverse momentum and rapidity distributions of dielectrons (e⁺e^- pairs) in p+p interactions at 3. 5GeV beam kinetic energy. In the vector meson mass region, a distinct peak corresponding to direct ω decays is reconstructed with a 2% mass resolution. The data is compared to predictions from three model calculations. Due to the large acceptance of the HADES apparatus for e⁺e^- invariant masses above 0. 2 GeV/c² and for transverse pair momenta p_t < 1 GeV/c, acceptance corrections are, to a large extent, model independent. This allows us to extract from dielectron data for the first time at this energy the inclusive production cross-sections for light vector mesons. Inclusive production cross-sections for π⁰ and η mesons are also reported. The obtained results will serve as an important reference for the study of vector meson production in proton-nucleus and heavy-ion collisions. Furthermore, using this data, an improved value for the upper bound of the branching ratio for direct η decays into the electron-positron channel is obtained.

Original language	English
Article number	64
Pages (from-to)	1-11
Number of pages	11
Journal	European Physical Journal A
Volume	48
Issue number	5
DOIs	https://doi.org/10.1140/epja/i2012-12064-y
State	Published - 2012
Externally published	Yes

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10.1140/epja/i2012-12064-y

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Agakishiev, G., Balanda, A., Belver, D., Belyaev, A., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, P., Castro, E., Chen, J. C., Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., ... Zanevsky, Y. (2012). Inclusive dielectron spectra in p+p collisions at 3.5 GeV kinetic beam energy. European Physical Journal A, 48(5), 1-11. Article 64. https://doi.org/10.1140/epja/i2012-12064-y

@article{3da3d44aabbb425ea1230f4062351d4d,

title = "Inclusive dielectron spectra in p+p collisions at 3.5 GeV kinetic beam energy",

abstract = "We present the inclusive invariant mass, transverse momentum and rapidity distributions of dielectrons (e+e- pairs) in p+p interactions at 3. 5GeV beam kinetic energy. In the vector meson mass region, a distinct peak corresponding to direct ω decays is reconstructed with a 2\% mass resolution. The data is compared to predictions from three model calculations. Due to the large acceptance of the HADES apparatus for e+e- invariant masses above 0. 2 GeV/c2 and for transverse pair momenta pt < 1 GeV/c, acceptance corrections are, to a large extent, model independent. This allows us to extract from dielectron data for the first time at this energy the inclusive production cross-sections for light vector mesons. Inclusive production cross-sections for π0 and η mesons are also reported. The obtained results will serve as an important reference for the study of vector meson production in proton-nucleus and heavy-ion collisions. Furthermore, using this data, an improved value for the upper bound of the branching ratio for direct η decays into the electron-positron channel is obtained.",

author = "G. Agakishiev and A. Balanda and D. Belver and A. Belyaev and A. Blanco and M. B{\"o}hmer and Boyard, \{J. L.\} and P. Cabanelas and E. Castro and Chen, \{J. C.\} and S. Chernenko and T. Christ and M. Destefanis and F. Dohrmann and A. Dybczak and E. Epple 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 C. Gilardi and M. Golubeva and D. Gonz{\'a}lez-D{\'i}az and F. Guber and M. Gumberidze 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 K. Kanaki and T. Karavicheva and I. Koenig and W. Koenig and Kolb, \{B. W.\} and R. Kotte and A. Kr{\'a}sa and F. Krizek and R. Kr{\"u}cken and H. Kuc and W. K{\"u}hn and A. Kugler and A. Kurepin and R. Lalik and S. Lang and Lange, \{J. S.\} and K. Lapidus and T. Liu and L. Lopes and M. Lorenz and L. Maier and A. Mangiarotti and J. Markert and V. Metag and B. Michalska and J. Michel and E. Morini{\`e}re and J. Mousa and C. M{\"u}ntz and L. Naumann and J. Otwinowski and Pachmayer, \{Y. C.\} and M. Palka and Y. Parpottas and V. Pechenov and O. Pechenova and J. Pietraszko and W. Przygoda and B. Ramstein and A. Reshetin and A. Rustamov and A. Sadovsky and P. Salabura and A. Schmah and E. Schwab and J. Siebenson and Sobolev, \{Yu G.\} and S. Spataro and B. Spruck and H. Str{\"o}bele and J. Stroth and C. Sturm and A. Tarantola and K. Teilab and P. Tlusty and M. Traxler and R. Trebacz and H. Tsertos and V. Wagner and M. Weber and C. Wendisch and J. W{\"u}stenfeld and S. Yurevich and Y. Zanevsky",

year = "2012",

doi = "10.1140/epja/i2012-12064-y",

language = "English",

volume = "48",

pages = "1--11",

journal = "European Physical Journal A",

issn = "1434-6001",

publisher = "Springer",

number = "5",

}

Agakishiev, G, Balanda, A, Belver, D, Belyaev, A, Blanco, A, Böhmer, M, Boyard, JL, Cabanelas, P, Castro, E, Chen, JC, Chernenko, S, Christ, T, Destefanis, M, Dohrmann, F, Dybczak, A, Epple, E, Fabbietti, L, Fateev, O, Finocchiaro, P, Fonte, P, Friese, J, Fröhlich, I, Galatyuk, T, Garzón, JA, Gernhäuser, R, Gilardi, C, Golubeva, M, González-Díaz, D, Guber, F, Gumberidze, M, Heinz, T, Hennino, T, Holzmann, R, Ierusalimov, A, Iori, I, Ivashkin, A, Jurkovic, M, Kämpfer, B, Kanaki, K, Karavicheva, T, Koenig, I, Koenig, W, Kolb, BW, Kotte, R, Krása, A, Krizek, F, Krücken, R, Kuc, H, Kühn, W, Kugler, A, Kurepin, A, Lalik, R, Lang, S, Lange, JS, Lapidus, K, Liu, T, Lopes, L, Lorenz, M, Maier, L, Mangiarotti, A, Markert, J, Metag, V, Michalska, B, Michel, J, Morinière, E, Mousa, J, Müntz, C, Naumann, L, Otwinowski, J, Pachmayer, YC, Palka, M, Parpottas, Y, Pechenov, V, Pechenova, O, Pietraszko, J, Przygoda, W, Ramstein, B, Reshetin, A, Rustamov, A, Sadovsky, A, Salabura, P, Schmah, A, Schwab, E, Siebenson, J, Sobolev, YG, Spataro, S, Spruck, B, Ströbele, H, Stroth, J, Sturm, C, Tarantola, A, Teilab, K, Tlusty, P, Traxler, M, Trebacz, R, Tsertos, H, Wagner, V, Weber, M, Wendisch, C, Wüstenfeld, J, Yurevich, S & Zanevsky, Y 2012, 'Inclusive dielectron spectra in p+p collisions at 3.5 GeV kinetic beam energy', European Physical Journal A, vol. 48, no. 5, 64, pp. 1-11. https://doi.org/10.1140/epja/i2012-12064-y

TY - JOUR

T1 - Inclusive dielectron spectra in p+p collisions at 3.5 GeV kinetic beam energy

AU - Agakishiev, G.

AU - Balanda, A.

AU - Belver, D.

AU - Belyaev, A.

AU - Blanco, A.

AU - Böhmer, M.

AU - Boyard, J. L.

AU - Cabanelas, P.

AU - Castro, E.

AU - Chen, J. C.

AU - Chernenko, S.

AU - Christ, T.

AU - Destefanis, M.

AU - Dohrmann, F.

AU - Dybczak, A.

AU - Epple, E.

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 - Gilardi, C.

AU - Golubeva, M.

AU - González-Díaz, D.

AU - Guber, F.

AU - Gumberidze, 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 - Kanaki, K.

AU - Karavicheva, T.

AU - Koenig, I.

AU - Koenig, W.

AU - Kolb, B. W.

AU - Kotte, R.

AU - Krása, A.

AU - Krizek, F.

AU - Krücken, R.

AU - Kuc, H.

AU - Kühn, W.

AU - Kugler, A.

AU - Kurepin, A.

AU - Lalik, R.

AU - Lang, S.

AU - Lange, J. S.

AU - Lapidus, K.

AU - Liu, T.

AU - Lopes, L.

AU - Lorenz, M.

AU - Maier, L.

AU - Mangiarotti, A.

AU - Markert, J.

AU - Metag, V.

AU - Michalska, B.

AU - Michel, J.

AU - Morinière, E.

AU - Mousa, J.

AU - Müntz, C.

AU - Naumann, L.

AU - Otwinowski, J.

AU - Pachmayer, Y. C.

AU - Palka, M.

AU - Parpottas, Y.

AU - Pechenov, V.

AU - Pechenova, O.

AU - Pietraszko, J.

AU - Przygoda, W.

AU - Ramstein, B.

AU - Reshetin, A.

AU - Rustamov, A.

AU - Sadovsky, A.

AU - Salabura, P.

AU - Schmah, A.

AU - Schwab, E.

AU - Siebenson, J.

AU - Sobolev, Yu G.

AU - Spataro, S.

AU - Spruck, B.

AU - Ströbele, H.

AU - Stroth, J.

AU - Sturm, C.

AU - Tarantola, A.

AU - Teilab, K.

AU - Tlusty, P.

AU - Traxler, M.

AU - Trebacz, R.

AU - Tsertos, H.

AU - Wagner, V.

AU - Weber, M.

AU - Wendisch, C.

AU - Wüstenfeld, J.

AU - Yurevich, S.

AU - Zanevsky, Y.

PY - 2012

Y1 - 2012

N2 - We present the inclusive invariant mass, transverse momentum and rapidity distributions of dielectrons (e+e- pairs) in p+p interactions at 3. 5GeV beam kinetic energy. In the vector meson mass region, a distinct peak corresponding to direct ω decays is reconstructed with a 2% mass resolution. The data is compared to predictions from three model calculations. Due to the large acceptance of the HADES apparatus for e+e- invariant masses above 0. 2 GeV/c2 and for transverse pair momenta pt < 1 GeV/c, acceptance corrections are, to a large extent, model independent. This allows us to extract from dielectron data for the first time at this energy the inclusive production cross-sections for light vector mesons. Inclusive production cross-sections for π0 and η mesons are also reported. The obtained results will serve as an important reference for the study of vector meson production in proton-nucleus and heavy-ion collisions. Furthermore, using this data, an improved value for the upper bound of the branching ratio for direct η decays into the electron-positron channel is obtained.

AB - We present the inclusive invariant mass, transverse momentum and rapidity distributions of dielectrons (e+e- pairs) in p+p interactions at 3. 5GeV beam kinetic energy. In the vector meson mass region, a distinct peak corresponding to direct ω decays is reconstructed with a 2% mass resolution. The data is compared to predictions from three model calculations. Due to the large acceptance of the HADES apparatus for e+e- invariant masses above 0. 2 GeV/c2 and for transverse pair momenta pt < 1 GeV/c, acceptance corrections are, to a large extent, model independent. This allows us to extract from dielectron data for the first time at this energy the inclusive production cross-sections for light vector mesons. Inclusive production cross-sections for π0 and η mesons are also reported. The obtained results will serve as an important reference for the study of vector meson production in proton-nucleus and heavy-ion collisions. Furthermore, using this data, an improved value for the upper bound of the branching ratio for direct η decays into the electron-positron channel is obtained.

UR - https://www.scopus.com/pages/publications/84861932821

U2 - 10.1140/epja/i2012-12064-y

DO - 10.1140/epja/i2012-12064-y

M3 - Article

AN - SCOPUS:84861932821

SN - 1434-6001

VL - 48

SP - 1

EP - 11

JO - European Physical Journal A

JF - European Physical Journal A

IS - 5

M1 - 64

ER -

Inclusive dielectron spectra in p+p collisions at 3.5 GeV kinetic beam energy

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