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1. Exploring time like tranistions in pp, πp and AA reactions with HADES

Author

Salabura Piotr, Adamczewski-Musch J., Arnoldi-Meadows B., Belounnas A., Belyaev A., Blanco A., Blume C., Böhmer M., Borisenko S, Chlad L., Chudoba P, Ciepał I., Dittert D., Dreyer J., Esmail W., Dürr M., Fabbietti L., Fateev S., Fonte P., Friese J., Fröhlich I., Förtsch J., Galatyuk T., Gernhäuser R., Golosov O., Golubeva M., Greifenhagen R., Guber F., Gumberidze M., Harabasz S., Hensch R., Höhne C., Holzmann R., Huck H., Ierusalimov A., Ivashkin A., Kämpfer B., Kampert K-H., Kardan B., Koenig I., Koenig W., Kornakov G., Kornas F., Kotte R., Kozela A., Kres I., Kuboś J., Kugler A., Kulesa P., Ladygin V., Lalik R., Lebedev A., Lebedev S., Linev S., Lopes L., Lorenz M., Lykasov G., Mahmoud T., Malige A., Markert J., Matulewicz T., Maurus S., Metag V., Michel J., Morozov S., Müntz C., Naumann L., Nowakowski K., Otto J.-H., Patel V., Pauly C., Pechenov V., Pechenova O., Petukhov O., Pfeifer D., Piasecki K., Pietraszko J., Prozorov A., Przygoda W., Pysz K., Ramstein B., Rathod N., Reshetin A., Ritman L., Rodriguez-Ramos P., Rost A., Salabura P., Scozzi F., Seck F., Selyuzhenkov I., Shabanov I., Singh US, Smyrski J., Spies S., Ströbele H., Stroth J., Stumm J., Svoboda O., Szala M., Tlusty P., Traxler M., Ungethüm C., Vazquez-Doce O., Wagner V., Weber A.A., Wendisch C., Wiebusch M.G., Wintz P., Wirth J., Zhilin A., and Zumbruch P.

Subjects
Physics, QC1-999
Abstract

Radiative transition of an excited baryon to a nucleon with emission of a virtual massive photon converting to dielectron pair (Dalitz decays) provides important information about baryon-photon coupling at low q2 in timelike region. A prominent enhancement in the respective electromagnetic transition Form Factors (etFF) at q2 near vector mesons ρ/ω poles has been predicted by various calculations reflecting strong baryon-vector meson couplings. The understanding of these couplings is also of primary importance for the interpretation of the emissivity of QCD matter studied in heavy ion collisions via dilepton emission. Dedicated measurements of baryon Dalitz decays in proton-proton and pion-proton scattering with HADES detector at GSI/FAIR are presented and discussed. The relevance of these studies for the interpretation of results obtained from heavy ion reactions is elucidated on the example of the HADES results.

Published
2020
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2. Time-Like Baryon Transitions studies with HADES

Author

Ramstein B., Adamczewski-Musch J., Arnold O., Arnoldi-Meadows B., Belounnas A., Belyaev A., Biernat J., Blanco A., Blume C., Böhmer M., Bordalo P., Chlad L., Chudoba P., Ciepał I., Deveaux C., Dittert D., Dreyer J., Fabbietti L., Fateev O., Fonte P., Franco C., Friese J., Fröhlich I., Galatyuk T., Garzón J. A., Gernhäuser R., Gillitzer A., Golubeva M., Greifenhagen R., Guber F., Gumberidze M., Harabasz S., Heinz T., Hennino T., Himmelreich M., Höhne C., Holzmann R., Ierusalimov A., Ivanov V., Ivashkin A., Kämpfer B., Kajetanowicz M., Kampert K-H., Karavicheva T., Kardan B., Khomyakov V., Koenig I., Koenig W., Korcyl G., Kornakov G., Kornas F., Kotte R., Kozela A., Kuboś J., Kugler A., Kunz T., Kurepin A., Kurilkin P., Kushpil V, Ladygin V., Lalik R., Lebedev A., Linev S., Liu M., Lopes L., Lorenz M., Lykasov G., Mahmoud T., Malakhov A., Markert J., Maurus S., Metag V., Michel J., Mihaylov D.M., Mikhaylov V., Morozov S., Müntz C., Naumann L., Nowakowski K., Parpottas Y., Patel V., Pauly C., Pechenov V., Pechenova O., Pereira A., Petousis V., Petukhov O., Pfeifer D., Pietraszko J., Przygoda W., Pysz K., Ramos S., Reshetin A., Ritman L., Rodriguez-Ramos P., Rost A., Sadovsky A., Salabura P., Scheib T., Schuldes H., Schwab E., Scozzi F., Seck F., Sellheim P., Selyuzhenkov I., Silva L., Smyrski J., Sobiella M., Spataro S., Spies S., Ströbele H., Stroth J., Strzempek P., Svoboda O., Szala M., Taranenko A., Tlusty P., Traxler M., Troyan A., Tsertos H., Wagner V., Wendisch C., Wiebusch M.G., Wintz P., Wirth J., Włoch B., Zhilin A., Zinchenko A., Zumbruch P., and Zuschke M.

Subjects
Physics, QC1-999
Abstract

The HADES collaboration uses the e+e− production as a probe of the resonance matter produced in collisions at incident energies of 1-3.5 GeV/nucleon at GSI. Elementary reactions provide useful references for these studies and give information on resonance Dalitz decays (R→Ne+e−). Such processes are sensitive to the structure of time-like electromagnetic baryon transitions in a kinematic range where (off-shell) vector mesons play a crucial role. Results obtained in proton-proton reactions and in a commissioning pion-beam experiment are reported and prospects for future pion beam experiments and for first hyperon Dalitz decay measurements are described. The connection with the investigations of medium effects to be continued with HADES in the next years at SIS18 and SIS100 is also discussed.

Published
2019
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3. Investigating hadronic resonances in pp interactions with HADES

Author

Przygoda Witold, Adamczewski-Musch J., Arnold O., Atomssa E.T., Behnke C., Berger-Chen J.C., Biernat J., Blanco A., Blume C., Böhmer M., Bordalo P., Chernenko S., Deveaux C., Dybczak A., Epple E., Fabbietti L., Fateev O., Fonte P., Franco C., Friese J., Fröhlich I., Galatyuk T., Garzón J. A., Gill K., Golubeva M., Guber F., Gumberidze M., Harabasz S., Hennino T., Hlavac S., Höhne C., Holzmann R., Ierusalimov A., Ivashkin A., Jurkovic M., Kämpfer B., Karavicheva T., Kardan B., Koenig I., Koenig W., Kolb B. W., Korcyl G., Kornakov G., Kotte R., Krása A., Krebs E., Kuc H., Kugler A., Kunz T., Kurepin A., Kurilkin A., Kurilkin P., Ladygin V., Lalik R., Lapidus K., Lebedev A., Lopes L., Lorenz M., Mahmoud T., Maier L., Mangiarotti A., Markert J., Metag V., Michel J., Müntz C., Münzer R., Naumann L., Palka M., Parpottas Y., Pechenov V., Pechenova O., Petousis V., Pietraszko J., Ramstein B., Rehnisch L., Reshetin A., Rost A., Rustamov A., Sadovsky A., Salabura P., Scheib T., Schmidt-Sommerfeld K., Schuldes H., Sellheim P., Siebenson J., Silva L., Sobolev Yu.G., Spataro S., Ströbele H., Stroth J., Strzempek P., Sturm C., Svoboda O., Tarantola A., Teilab K., Tlusty P., Traxler M., Tsertos H., Vasiliev T., Wagner V., Wendisch C., Wirth J., Wüstenfeld J., Zanevsky Y., and Zumbruch P.

Subjects
Physics, QC1-999
Abstract

In this paper we report on the investigation of baryonic resonance production in proton-proton collisions at the kinetic energies of 1.25 GeV and 3.5 GeV, based on data measured with HADES. Exclusive channels npπ+ and ppπ0 as well as ppe+e− were studied simultaneously in the framework of a one-boson exchange model. The resonance cross sections were determined from the one-pion channels for Δ(1232) and N(1440) (1.25 GeV) as well as further Δ and N* resonances up to 2 GeV/c2 for the 3.5 GeV data. The data at 1.25 GeV energy were also analysed within the framework of the partial wave analysis together with the set of several other measurements at lower energies. The obtained solutions provided the evolution of resonance production with the beam energy, showing a sizeable non-resonant contribution but with still dominating contribution of Δ(1232)P33. In the case of 3.5 GeV data, the study of the ppe+e− channel gave the insight on the Dalitz decays of the baryon resonances and, in particular, on the electromagnetic transition form-factors in the time-like region. We show that the assumption of a constant electromagnetic transition form-factors leads to underestimation of the yield in the dielectron invariant mass spectrum below the vector mesons pole. On the other hand, a comparison with various transport models shows the important role of intermediate ρ production, though with a large model dependency. The exclusive channels analysis done by the HADES collaboration provides new stringent restrictions on the parameterizations used in the models.

Published
2015
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4. Highlights of Resonance Measurements With HADES

Author

Epple Eliane, Adamczewski-Musch J., Arnold O., Atomssa E.T., Behnke C., Berger-Chen J.C., Biernat J., Blanco A., Blume C., Böhmer M., Bordalo P., Chernenko S., Deveaux C., Dybczak A., Fabbietti L., Fateev O., Fonte P., Franco C., Friese J., Fröhlich I., Galatyuk T., Garzón J. A., Gill K., Golubeva M., Guber F., Gumberidze M., Harabasz S., Hennino T., Hlavac S., Höhne C., Holzmann R., Ierusalimov A., Ivashkin A., Jurkovic M., Kämpfer B., Karavicheva T., Kardan K., Koenig I., Koenig W., Kolb B. W., Korcyl G., Kornakov G., Kotte R., Krása A., Krebs E., Kuc H., Kugler A., Kunz T., Kurepin A., Kurilkin A., Kurilkin P., Ladygin V., Lalik R., Lapidus K., Lebedev A., Lopes L., Lorenz M., Mahmoud T., Maier L., Mangiarotti A., Markert J., Metag V., Michel J., Müntz C., Münzer R., Naumann L., Palka M., Parpottas Y., Pechenov V., Pechenova O., Petousis V., Pietraszko J., Przygoda W., Ramstein B., Rehnisch L., Reshetin A., Rost A., Rustamov A., Sadovsky A., Salabura P., Scheib T., Schmidt-Sommerfeld K., Schuldes H., Sellheim P., Siebenson J., Silva L., Sobolev Yu.G., Spataro S., Ströbele H., Stroth J., Strzempek P., Sturm C., Svoboda O., Tarantola A., Teilab K., Tlusty P., Traxler M., Tsertos H., Vasiliev T., Wagner V., Wendisch C., Wirth J., Wüstenfeld J., Zanevsky Y., and Zumbruch P.

Subjects
Physics, QC1-999
Abstract

This contribution aims to give a basic overview of the latest results regarding the production of resonances in different collision systems. The results were extracted from experimental data collected with HADES that is a multipurpose detector located at the GSI Helmholtzzentrum, Darmstadt. The main points discussed here are: the properties of the strange resonances Λ(1405) and Σ(1385), the role of Δ’s as a source of pions in the final state, the production dynamics reflected in form of differential cross sections, and the role of the ϕ meson as a source for K− particles.

Published
2015
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5. Low mass dielectrons radiated off cold nuclear matter measured with HADES

Author

Lorenz M., Agakishiev G., Behnke C., Belver D., Belyaev A., Berger-Chen J.C., Blanco A., Blume C., Böhmer M., Cabanelas P., Chernenko S., Dritsa C., Dybczak A., Epple E., Fabbietti L., Fateev O., Fonte P., Friese J., Fröhlich I., Galatyuk T., Garzón J. A., Gill K., Golubeva M., González-Díaz D., Guber F., Gumberidze M., Harabasz S., Hennino T., Höhne C., Holzmann R., Huck P., Ierusalimov A., Ivashkin A., Jurkovic M., Kämpfer B., Karavicheva T., Koenig I., Koenig W., Kolb B. W., Korcyl G., Kornakov G., Kotte R., Krása A., Krebs E., Krizek F., Kuc H., Kugler A., Kurepin A., Kurilkin A., Kurilkin P., Ladygin V., Lalik R., Lang S., Lapidus K., Lebedev A., Lopes L., Maier L., Mangiarotti A., Markert J., Metag V., Michel J., Müntz C., Münzer R., Naumann L., Palka M., Parpottas Y., Pechenov V., Pechenova O., Pietraszko J., Przygoda W., Ramstein B., Rehnisch L., Reshetin A., Rustamov A., Sadovsky A., Salabura P., Scheib T., Schuldes H., Siebenson J., Sobolev Yu.G., Spataro S., Ströbele H., Stroth J., Strzempek P, Sturm C., Svoboda O., Tarantola A., Teilab K., Tlusty P., Traxler M., Tsertos H., Vasiliev T., Wagner V., Weber M., Wendisch C., Wüstenfeld J., Yurevich S., and Zanevsky Y.

Subjects
Physics, QC1-999
Abstract

The High Acceptance DiElectron Spectrometer HADES [1] is installed at the Helmholtzzentrum für Schwerionenforschung (GSI) accelerator facility in Darmstadt. It investigates dielectron emission and strangeness production in the 1-3 AGeV regime. A recent experiment series focusses on medium-modifications of light vector mesons in cold nuclear matter. In two runs, p+p and p+Nb reactions were investigated at 3.5 GeV beam energy; about 9·109 events have been registered. In contrast to other experiments the high acceptance of the HADES allows for a detailed analysis of electron pairs with low momenta relative to nuclear matter, where modifications of the spectral functions of vector mesons are predicted to be most prominent. Comparing these low momentum electron pairs to the reference measurement in the elementary p+p reaction, we find in fact a strong modification of the spectral distribution in the whole vector meson region.

Published
2014
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6. In-medium hadron properties measured with HADES

Author

Pietraszko J., Agakishiev G., Behnke C., Belver D., Belyaev A., Berger-Chen J.C., Blanco A., Blume C., Böhmer M., Cabanelas P., Chernenko S., Dritsa C., Dybczak A., Epple E., Fabbietti L., Fateev O., Fonte P., Friese J., Fröhlich I., Galatyuk T., Garzón J. A., Gill K., Golubeva M., González-Díaz D., Guber F., Gumberidze M., Harabasz S., Hennino T., Höhne C., Holzmann R., Huck P., Ierusalimov A., Ivashkin A., Jurkovic M., Kämpfer B., Karavicheva T., Koenig I., Koenig W., Kolb B. W., Korcyl G., Kornakov G., Kotte R., Krása A., Krebs E., Krizek F., Kuc H., Kugler A., Kurepin A., Kurilkin A., Kurilkin P., Ladygin V., Lalik R., Lang S., Lapidus K., Lebedev A., Lopes L., Lorenz M., Maier L., Mangiarotti A., Markert J., Metag V., Michel J., Müntz C., Münzer R., Naumann L., Palka M., Parpottas Y., Pechenov V., Pechenova O., Przygoda W., Ramstein B., Rehnisch L., Reshetin A., Rustamov A., Sadovsky A., Salabura P., Scheib T., Schuldes H., Siebenson J., Sobolev Yu.G., Spataro S., Ströbele H., Stroth J., Strzempek P, Sturm C., Svoboda O., Tarantola A., Teilab K., Tlusty P., Traxler M., Tsertos H., Vasiliev T., Wagner V., Weber M., Wendisch C., Wüstenfeld J., Yurevich S., and Zanevsky Y.

Subjects
Physics, QC1-999
Abstract

Many QCD based and phenomenological models predict changes of hadron properties in a strongly interacting environment. The results of these models differ significantly and the experimental determination of hadron properties in nuclear matter is essential. In this paper we present a review of selected physics results obtained at GSI Helmholtzzentrum für Schwerionenforschung GmbH by HADES (High-Acceptance Di-Electron Spectrometer). The e+e− pair emission measured for proton and heavy-ion induced collisions is reported together with results on strangeness production. The future HADES activities at the planned FAIR facility are also discussed.

Published
2014
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7. Measurement of the quasi free np → npπ+π− and np → ppπ−π0 reactions at 1.25 GeV With HADES

Author

Kurilkin A., Arnold O., Atomssa E. T., Behnke C., Belyaev A., Berger-Chen J. C., Biernat J., Blanco A., Blume C., Böhmer M., Bordalo P., Chernenko S., Deveaux C., Dybczak A., Epple E., Fabbietti L., Fateev O., Fonte P., Franco C., Friese J., Fröhlich I., Galatyuk T., Garzón J. A., Gill K., Golubeva M., González-Díaz D., Guber F., Gumberidze M., Harabasz S., Hennino T., Höhne C., Holzmann R., Ierusalimov A., Ivashkin A., Jurkovic M., Kämpfer B., Karavicheva T., Kardan K., Koenig I., Koenig W., Kolb B. W., Korcyl G., Kornakov G., Kotte R., Krása A., Krebs E., Krizek F., Kuc H., Kugler A., Kunz T., Kurepin A., Kurilkin P., Ladygin V., Lalik R., Lang S., Lapidus K., Lebedev A., Lopes L., Lorenz M., Maier L., Mangiarotti A., Markert J., Metag V., Michel J., Müntz C., Münzer R., Naumann L., Palka M., Pechenov V., Pechenova O., Petousis V., Pietraszko J., Przygoda W., Ramstein B., Rehnisch L., Reshetin A., Rost A., Rustamov A., Sadovsky A., Salabura P., Scheib T., Schmidt-Sommerfeld K., Schuldes H., Sellheim P., Siebenson J., Silva L., Sobolev Yu. G., Spataro S., Ströbele H., Stroth J., Strzempek P., Sturm C., Svoboda O., Tarantola A., Teilab K., Tlusty P., Traxler M., Tsertos H., Vasiliev T., Wagner V., Wendisch C., Wirth J., Wüstenfeld J., Yurevich S., and Zanevsky Y.

Subjects
Physics, QC1-999
Abstract

We present the results of two-pion production in tagged quasi-free np collisions at a deutron incident beam energy of 1.25 GeV/c measured with the High-Acceptance Di-Electron Spectrometer (HADES) installed at GSI. The specific acceptance of HADES allowed for the first time to obtain high-precision data on π+π− and π−π0 production in np collisions in a region corresponding to large transverse momenta of the secondary particles. The obtained differential cross section data provide strong constraints on the production mechanisms and on the various baryon resonance contributions (∆∆, N(1440), N(1520), ∆(1600)). The invariant mass and angular distributions from the np → npπ+π −and np → ppπ−π0 reactions are compared with different theoretical model predictions.

Published
2014
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8. HADES results in elementary reactions

Author

Ramstein B., Adamczewski-Musch J., Arnold O., Atomssa E.T., Behnke C., Berger-Chen J.C., Biernat J., Blanco A., Blume C., Böhmer M., Bordalo P., Chernenko S., Deveaux C., Dybczak A., Epple E., Fabbietti L., Fateev O., Fonte P., Franco C., Friese J., Fröhlich I., Galatyuk T., Garzón J. A., Gill K., Golubeva M., Guber F., Gumberidze M., Harabasz S., Hennino T., Hlavac S., Höhne C., Holzmann R., Ierusalimov A., Ivashkin A., Jurkovic M., Kämpfer B., Karavicheva T., Kardan K., Koenig I., Koenig W., Kolb B. W., Korcyl G., Kornakov G., Kotte R., Krása A., Krebs E., Kuc H., Kugler A., Kunz T., Kurepin A., Kurilkin A., Kurilkin P., Ladygin V., Lalik R., Lapidus K., Lebedev A., Lopes L., Lorenz M., Mahmoud T., Maier L., Mangiarotti A., Markert J., Metag V., Michel J., Müntz C., Münzer R., Naumann L., Palka M., Parpottas Y., Pechenov V., Pechenova O., Petousis V., Pietraszko J., Przygoda W., Rehnisch L., Reshetin A., Rost A., Rustamov A., Sadovsky A., Salabura P., Scheib T., Schmidt-Sommerfeld K., Schuldes H., Sellheim P., Siebenson J., Silva L., Sobolev Yu.G., Spataro S., Ströbele H., Stroth J., Strzempek P., Sturm C., Svoboda O., Tarantola A., Teilab K., Tlusty P., Traxler M., Tsertos H., Vasiliev T., Wagner V., Wendisch C., Wirth J., Wüstenfeld J., Zanevsky Y., and Zumbruch P.

Subjects
Physics, QC1-999
Abstract

Recent results obtained with the HADES experimental set-up at GSI are presented with a focus on dielectron production and strangeness in pp and quasi-free np reactions. Perspectives related to the very recent experiment using the pion beam at GSI are also discussed.

Published
2014
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9. The dp-elastic cross section measurement at the deuteron kinetic energy of 2.5 GeV

Author

Rustamov A., Reshetin A., Rehnisch L., Ramstein B., Przygoda W., Pietraszko J., Pechenova O., Parpottas Y., Pechenov V., Palka M., Naumann L., Münzer R., Müntz C., Michel J., Metag V., Markert J., Mangiarotti A., Maier L., Lorenz M., Lopes L., Lebedev A., Lapidus K., Lang S., Lalik R., Ladygin V., Kurilkin A., Kurepin A., Kuc H., Kugler A., Krizek F., Krebs E., Krása A., Kotte R., Kornakov G., Korcyl G., Kolb B. W., Koenig W., Koenig I., Kämpfer B., Karavicheva T., Jurkovic M., Ivashkin A., Ierusalimov A., Höhne C., Huck P., Holzmann R., Hennino T., Harabasz S., Gumberidze M., Guber F., González-Díaz D., Golubeva M., Gill K., Galatyuk T., Garzón J. A., Fröhlich I., Fonte P., Friese J., Fateev O., Fabbietti L., Epple E., Dybczak A., Dritsa C., Chernenko S., Cabanelas P., Böhmer M., Blume C., Blanco A., Berger-Chen J.C., Belyaev A., Belver D., Behnke C., Agakishiev G., Kurilkin P., Sadovsky A., Salabura P., Scheib T., Schuldes H., Siebenson J., Sobolev Yu.G., Spataro S., Ströbele H., Stroth J., Strzempek P., Sturm C., Svoboda O., Tarantola A., Teilab K., Tlusty P., Traxler M., Tsertos H., Vasiliev T., Wagner V., Weber M., Wendisch C., Wüstenfeld J., Yurevich S., and Zanevsky Y.

Subjects
Physics, QC1-999
Abstract

New results on the differential cross section in deuteron-proton elastic scattering are obtained at the deuteron kinetic energy of 2.5 GeV with the HADES spectrometer. The angular range of 69° – 125° in the center of mass system is covered. The obtained results are compared with the relativistic multiple scattering model calculation using the CD-Bonn deuteron wave function. The data at fixed scattering angles in the c.m. are in qualitative agreement with the constituent counting rules prediction.

Published
2012
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10. Resonance production in p+p, p+A and A+A collisions measured with HADES

Author

Reshetin A., Rehnisch L., Ramstein B., Przygoda W., Pietraszko J., Pechenova O., Pechenov V., Parpottas Y., Palka M., Naumann L., Münzer R., Müntz C., Michel J., Metag V., Markert J., Mangiarotti A., Maier L., Lopes L., Lebedev A., Lapidus K., Lang S., Lalik R., Ladygin V., Kurilkin P., Kurilkin A., Kurepin A., Kuc H., Kugler A., Krizek F., Krebs E., Krása A., Kotte R., Kornakov G., Korcyl G., Kolb B. W., Koenig W., Koenig I., Karavicheva T., Kämpfer B., Jurkovic M., Ivashkin A., Ierusalimov A., Höhne C., Huck P., Holzmann R., Hennino T., Harabasz S., Gumberidze M., Guber F., Gonzáalez-Díaz D., Golubeva M., Gill K., Garzón J. A., Galatyuk T., Fröhlich I., Friese J., Fabbietti L., Fonte P., Epple E., Dybczak A., Dritsa C., Cabanelas P., Böhmer M., Blume C., Blanco A., Berger-Chen J.C., Belyaev A., Belver D., Behnke C., Agakishiev G., Lorenz M., Rustamov A., Sadovsky A., Salabura P., Scheib T., Schuldes H., Siebenson J., Sobolev Yu.G., Spataroe S., Ströbele H., Stroth J., Strzempek P., Sturm C., Svoboda O., Tarantola A., Teilab K., Tlusty P., Traxler M., Tsertos H., Vasiliev T., Wagner V., Weber M., Wendisch C., Wüstenfeld J., Yurevich S., and Zanevsky Y.

Subjects
Physics, QC1-999
Abstract

The knowledge of baryonic resonance properties and production cross sections plays an important role for the extraction and understanding of medium modifications of mesons in hot and/or dense nuclear matter. We present and discuss systematics on dielectron and strangeness production obtained with HADES on p+p, p+A and A+A collisions in the few GeV energy regime with respect to these resonances.

Published
2012
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11. Investigating hadronic resonances in pp interactions with HADES

Author

Adamczewski-Musch, J., Arnold, O., Atomssa, E. T., Behnke, C., Berger-Chen, J. C., Biernat, J., Blanco, A., Blume, C., Böhmer, M., Bordalo, P., Chernenko, S., Deveaux, C., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Fonte, P., Franco, C., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gill, K., Golubeva, M., Guber, F., Gumberidze, M., Harabasz, S., Hennino, T., Hlavac, S., Höhne, C., Holzmann, R., Ierusalimov, A., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Kardan, B., Koenig, I., Koenig, W., Kolb, B. W., Korcyl, G., Kornakov, G., Kotte, R., Krása, Antonín, Krebs, E., Kuc, H., Kugler, A., Kunz, T., Kurepin, A., Kurilkin, A., Kurilkin, P., Ladygin, V., Lalik, R., Lapidus, K., Lebedev, A., Lopes, L., Lorenz, M., Mahmoud, T., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michel, J., Müntz, C., Münzer, R., Naumann, L., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Petousis, Vlassis, Pietraszko, J., Ramstein, B., Rehnisch, L., Reshetin, A., Rost, A., Rustamov, A., Sadovsky, A., Salabura, P., Scheib, T., Schmidt-Sommerfeld, K., Schuldes, H., Sellheim, P., Siebenson, J., Silva, L., Sobolev, Y. G., Spataro, S., Ströbele, H., Stroth, J., Strzempek, P., Sturm, C., Svoboda, O., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Tsertos, Haralambos, Vasiliev, T., Wagner, V., Wendisch, C., Wirth, J., Wüstenfeld, J., Zanevsky, Y., Zumbruch, P., Bleicher M., Greco V., Aichelin J., Badala A., Fabbietti L., Markert C., van Hees H., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Physics, Particle physics, Meson, QC1-999, Partial wave analysis, Hadron, Resonance, Kinetic energy, 7. Clean energy, Nuclear physics, Baryon, Mass spectrum, High Energy Physics::Experiment, Invariant mass, Nuclear Experiment
Abstract

In this paper we report on the investigation of baryonic resonance production in proton-proton collisions at the kinetic energies of 1.25 GeV and 3.5 GeV, based on data measured with HADES. Exclusive channels npπ+ and ppπ0 as well as ppe+e- were studied simultaneously in the framework of a one-boson exchange model. The resonance cross sections were determined from the one-pion channels for Δ(1232) and N(1440) (1.25 GeV) as well as further Δ and N∗ resonances up to 2 GeV/c2 for the 3.5 GeV data. The data at 1.25 GeV energy were also analysed within the framework of the partial wave analysis together with the set of several other measurements at lower energies. The obtained solutions provided the evolution of resonance production with the beam energy, showing a sizeable non-resonant contribution but with still dominating contribution of Δ(1232)P33. In the case of 3.5 GeV data, the study of the ppe+e- channel gave the insight on the Dalitz decays of the baryon resonances and, in particular, on the electromagnetic transition form-factors in the time-like region. We show that the assumption of a constant electromagnetic transition form-factors leads to underestimation of the yield in the dielectron invariant mass spectrum below the vector mesons pole. On the other hand, a comparison with various transport models shows the important role of intermediate ρ production, though with a large model dependency. The exclusive channels analysis done by the HADES collaboration provides new stringent restrictions on the parameterizations used in the models. © 2015 Owned by the authors, published by EDP Sciences. 97 Sponsors: Helmholtz International Center for FAIR c/o FIAS INFN-Sezione di Catania University of Texas at Austin Conference code: 119031

Published
2015
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12. Measurement of the quasi freenp→npπ+π−andnp→ppπ−π0reactions at 1.25 GeV With HADES

Author

Kurilkin, A., primary, Arnold, O., additional, Atomssa, E. T., additional, Behnke, C., additional, Belyaev, A., additional, Berger-Chen, J. C., additional, Biernat, J., additional, Blanco, A., additional, Blume, C., additional, Böhmer, M., additional, Bordalo, P., additional, Chernenko, S., additional, Deveaux, C., additional, Dybczak, A., additional, Epple, E., additional, Fabbietti, L., additional, Fateev, O., additional, Fonte, P., additional, Franco, C., additional, Friese, J., additional, Fröhlich, I., additional, Galatyuk, T., additional, Garzón, J. A., additional, Gill, K., additional, Golubeva, M., additional, González-Díaz, D., additional, Guber, F., additional, Gumberidze, M., additional, Harabasz, S., additional, Hennino, T., additional, Höhne, C., additional, Holzmann, R., additional, Ierusalimov, A., additional, Ivashkin, A., additional, Jurkovic, M., additional, Kämpfer, B., additional, Karavicheva, T., additional, Kardan, K., additional, Koenig, I., additional, Koenig, W., additional, Kolb, B. W., additional, Korcyl, G., additional, Kornakov, G., additional, Kotte, R., additional, Krása, A., additional, Krebs, E., additional, Krizek, F., additional, Kuc, H., additional, Kugler, A., additional, Kunz, T., additional, Kurepin, A., additional, Kurilkin, P., additional, Ladygin, V., additional, Lalik, R., additional, Lang, S., additional, Lapidus, K., additional, Lebedev, A., additional, Lopes, L., additional, Lorenz, M., additional, Maier, L., additional, Mangiarotti, A., additional, Markert, J., additional, Metag, V., additional, Michel, J., additional, Müntz, C., additional, Münzer, R., additional, Naumann, L., additional, Palka, M., additional, Pechenov, V., additional, Pechenova, O., additional, Petousis, V., additional, Pietraszko, J., additional, Przygoda, W., additional, Ramstein, B., additional, Rehnisch, L., additional, Reshetin, A., additional, Rost, A., additional, Rustamov, A., additional, Sadovsky, A., additional, Salabura, P., additional, Scheib, T., additional, Schmidt-Sommerfeld, K., additional, Schuldes, H., additional, Sellheim, P., additional, Siebenson, J., additional, Silva, L., additional, Sobolev, Yu. G., additional, Spataro, S., additional, Ströbele, H., additional, Stroth, J., additional, Strzempek, P., additional, Sturm, C., additional, Svoboda, O., additional, Tarantola, A., additional, Teilab, K., additional, Tlusty, P., additional, Traxler, M., additional, Tsertos, H., additional, Vasiliev, T., additional, Wagner, V., additional, Wendisch, C., additional, Wirth, J., additional, Wüstenfeld, J., additional, Yurevich, S., additional, and Zanevsky, Y., additional

Published
2014
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13. Resonance production in p+p, p+A and A+A collisions measured with HADES

Author

Lorenz, M., primary, Agakishiev, G., additional, Behnke, C., additional, Belver, D., additional, Belyaev, A., additional, Berger-Chen, J.C., additional, Blanco, A., additional, Blume, C., additional, Böhmer, M., additional, Cabanelas, P., additional, Dritsa, C., additional, Dybczak, A., additional, Epple, E., additional, Fabbietti, L., additional, Fonte, P., additional, Friese, J., additional, Fröhlich, I., additional, Galatyuk, T., additional, Garzón, J. A., additional, Gill, K., additional, Golubeva, M., additional, Gonzáalez-Díaz, D., additional, Guber, F., additional, Gumberidze, M., additional, Harabasz, S., additional, Hennino, T., additional, Holzmann, R., additional, Huck, P., additional, Höhne, C., additional, Ierusalimov, A., additional, Ivashkin, A., additional, Jurkovic, M., additional, Kämpfer, B., additional, Karavicheva, T., additional, Koenig, I., additional, Koenig, W., additional, Kolb, B. W., additional, Korcyl, G., additional, Kornakov, G., additional, Kotte, R., additional, Krása, A., additional, Krebs, E., additional, Krizek, F., additional, Kuc, H., additional, Kugler, A., additional, Kurepin, A., additional, Kurilkin, A., additional, Kurilkin, P., additional, Ladygin, V., additional, Lalik, R., additional, Lang, S., additional, Lapidus, K., additional, Lebedev, A., additional, Lopes, L., additional, Maier, L., additional, Mangiarotti, A., additional, Markert, J., additional, Metag, V., additional, Michel, J., additional, Müntz, C., additional, Münzer, R., additional, Naumann, L., additional, Palka, M., additional, Parpottas, Y., additional, Pechenov, V., additional, Pechenova, O., additional, Pietraszko, J., additional, Przygoda, W., additional, Ramstein, B., additional, Rehnisch, L., additional, Reshetin, A., additional, Rustamov, A., additional, Sadovsky, A., additional, Salabura, P., additional, Scheib, T., additional, Schuldes, H., additional, Siebenson, J., additional, Sobolev, Yu.G., additional, Spataroe, S., additional, Ströbele, H., additional, Stroth, J., additional, Strzempek, P., additional, Sturm, C., additional, Svoboda, O., additional, Tarantola, A., additional, Teilab, K., additional, Tlusty, P., additional, Traxler, M., additional, Tsertos, H., additional, Vasiliev, T., additional, Wagner, V., additional, Weber, M., additional, Wendisch, C., additional, Wüstenfeld, J., additional, Yurevich, S., additional, and Zanevsky, Y., additional

Published
2012
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14. Thedp-elastic cross section measurement at the deuteron kinetic energy of 2.5 GeV

Author

Kurilkin, P., primary, Agakishiev, G., additional, Behnke, C., additional, Belver, D., additional, Belyaev, A., additional, Berger-Chen, J.C., additional, Blanco, A., additional, Blume, C., additional, Böhmer, M., additional, Cabanelas, P., additional, Chernenko, S., additional, Dritsa, C., additional, Dybczak, A., additional, Epple, E., additional, Fabbietti, L., additional, Fateev, O., additional, Fonte, P., additional, Friese, J., additional, Fröhlich, I., additional, Galatyuk, T., additional, Garzón, J. A., additional, Gill, K., additional, Golubeva, M., additional, González-Díaz, D., additional, Guber, F., additional, Gumberidze, M., additional, Harabasz, S., additional, Hennino, T., additional, Holzmann, R., additional, Huck, P., additional, Höhne, C., additional, Ierusalimov, A., additional, Ivashkin, A., additional, Jurkovic, M., additional, Kämpfer, B., additional, Karavicheva, T., additional, Koenig, I., additional, Koenig, W., additional, Kolb, B. W., additional, Korcyl, G., additional, Kornakov, G., additional, Kotte, R., additional, Krása, A., additional, Krebs, E., additional, Krizek, F., additional, Kuc, H., additional, Kugler, A., additional, Kurepin, A., additional, Kurilkin, A., additional, Ladygin, V., additional, Lalik, R., additional, Lang, S., additional, Lapidus, K., additional, Lebedev, A., additional, Lopes, L., additional, Lorenz, M., additional, Maier, L., additional, Mangiarotti, A., additional, Markert, J., additional, Metag, V., additional, Michel, J., additional, Müntz, C., additional, Münzer, R., additional, Naumann, L., additional, Palka, M., additional, Parpottas, Y., additional, Pechenov, V., additional, Pechenova, O., additional, Pietraszko, J., additional, Przygoda, W., additional, Ramstein, B., additional, Rehnisch, L., additional, Reshetin, A., additional, Rustamov, A., additional, Sadovsky, A., additional, Salabura, P., additional, Scheib, T., additional, Schuldes, H., additional, Siebenson, J., additional, Sobolev, Yu.G., additional, Spataro, S., additional, Ströbele, H., additional, Stroth, J., additional, Strzempek, P., additional, Sturm, C., additional, Svoboda, O., additional, Tarantola, A., additional, Teilab, K., additional, Tlusty, P., additional, Traxler, M., additional, Tsertos, H., additional, Vasiliev, T., additional, Wagner, V., additional, Weber, M., additional, Wendisch, C., additional, Wüstenfeld, J., additional, Yurevich, S., additional, and Zanevsky, Y., additional

Published
2012
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15. TRANSVERSE MOMENTUM SPECTRUM OF NEUTRAL ELECTROMAGNETIC PARTICLES PRODUCED AT THE CERN PROTON ANTI-PROTON COLLIDER

Author

Arnison, G, Astbury, A, Aubert, B, Bacci, C, Bernabei, R, Bezaguet, R, Bock, R, Bowcock, T, Calvetti, M, Carroll, T, Catz, P, Centro, S, Ceradini, F, Ciborowski, J, Cittolin, S, Cnops, A, Cochet, C, Colas, J, Corden, M, Dallman, D, D'Angelo, S, Debeer, M, Della Negra, M, Demoulin, M, Denegri, D, Dibitonto, D, Dobrzynski, L, Dowell, J, Edwards, M, Eggert, K, Eisenhandler, E, Ellis, N, Erhard, P, Faissner, H, Fontaine, G, Fournier, J, Frey, R, Fruhwirth, R, Garvey, G, Geer, S, Ghesquiere, C, Ghez, P, Giboni, K, Gibson, W, Giraud-Heraud, Y, Givernaud, A, Gonidec, A, Grayer, G, Gutierrez, P, Haidan, R, Hansl-Kozanecka, T, Haynes, W, Hertzberger, L, Hodges, C, Hoffmann, D, Hoffmann, H, Holthuizen, D, Homer, R, Honma, A, Jank, W, Kalmus, P, Karimaki, V, Keeler, R, Kenyon, I, Kernan, A, Kinnunen, R, Kowalski, H, Kozanecki, W, Kryn, D, Lacava, F, Laugier, J, Leesjp, Lehmann, H, Leuchs, R, Leveque, A, Linglin, D, Locci, E, Loret, M, Malosse, J, Markiewicz, T, Maurin, G, Mcmahon, T, Mendiburu, J, Minard, M, Moricca, M, Muirhead, H, Muller, F, Nandi, A, Naumann, L, Norton, A, Orkin-Lecourtois, A, Paoluzi, L, Piano Mortari, G, Pimia, M, Placci, A, Radermacher, E, Ransdell, J, Reithler, H, Rich, J, Rijssenbeek, M, Roberts, C, Rubbia, C, Sadoulet, B, Sajot, G, Salvi, G, Salvini, G, Sass, J, Saudraix, J, Savoy-Navarro, A, Schinzel, D, Scott, W, Shah, T, Spiro, M, Strauss, J, Sumorok, K, Szoncso, F, Tao, C, Timmer, J, Thompson, G, Tscheslog, E, Tuominiemi, J, Vialle, J, Vrana, J, Vuillemin, V, Wahl, H, Watkins, P, Wilson, J, Yvert, M, and Zurfluh, E

Subjects
proton-antiproton collider, cern, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
1982

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