ABSTRACT The HADES spectrometer installed at GSI Darmstadt is devoted to the study of the product... more ABSTRACT The HADES spectrometer installed at GSI Darmstadt is devoted to the study of the production of di- lepton pairs from vector meson decays in relativistic nucleus-nucleus collisions, as well as proton- and pion-induced reactions. Extraction of rare lepton pairs in high hadron multiplicity events requires an efficient particle identification ( PID). In HADES charged particles momentum is measured by a tracking system surrounding the toroidal super conducting magnet, and velocity and energy loss is provided by a TOF detector. Leptons are identified by a Rich as well as a Shower detector. The particle identification method is using full experimental information from all subdetectors. To demonstrate the method performance, single particle spectra of charged hadrons and leptons from C+C at 2 A GeV will be presented and compared with results of corresponding simulations. The proton and pion yields an m T and rapidity distributions will be compared with existing data. Very preliminary results of lepton analysis will be shown as well.
A. Akindinov, V. Ammosov, E. Badura, M. Ciobanu, E. Cordier, F. Dohrmann, R. Ferreira Marques, P.... more A. Akindinov, V. Ammosov, E. Badura, M. Ciobanu, E. Cordier, F. Dohrmann, R. Ferreira Marques, P. Fonte, J. Garzon, D. Gonzalez-Diaz, Y. Grishuk, F. Guber, N. Herrmann, O. Karavichev, S. Kiselev, K. Koch, B. Kohlmeyer, R. Kotte, A. Kuznetsov, A. Maevskaia, A. Mangiarotti, A. Martemiyanov, M. Petrovici, A. Policarpo, V. Rasin, A. Schüttauf, A. Semak, A. Smirnitskiy, G. Stoicea, Y. Sviridov, V. Tiflov, K. Voloshin, V. Zaets, B. Zagreev, and the CBM Collaboration 1 National Institute for Physics and Nuclear Engineering, Bucharest, Romania; 2 LIP, Coimbra, Portugal; 3 GSI, Darmstadt, Germany; 4 Physikalisches Institut, Universität Heidelberg, Germany; 5 Fachbereich Physik, Universität Marburg, Germany; 6 Institute for Nuclear Research, Moscow, Russia; 7 ITEP, Moscow, Russia; 8 IHEP, Protvino, Russia; 9 FZR, Institut für Kernund Hadronenphysik, Rossendorf, Germany; 10 Universidad de Santiago de Compostela, Santiago de Compostela, Spain
The HADES (High Acceptance Di-Electron Spectrometer) is a tool designed for lepton pair (e+ e−) s... more The HADES (High Acceptance Di-Electron Spectrometer) is a tool designed for lepton pair (e+ e−) spectroscopy in pion, proton and heavy ion induced reactions in the 1–2AGeV energy range. One of the goals of the HADES experiment is to study in-medium ...
Journal of Physics G: Nuclear and Particle Physics, 2005
The high-acceptance dielectron spectrometer (HADES) has become operational at GSI Darmstadt. The ... more The high-acceptance dielectron spectrometer (HADES) has become operational at GSI Darmstadt. The primary physics programme is to study in-medium changes of light vector mesons via their e+ e− decays. The methods of dilepton signal reconstruction in the ...
ABSTRACT In this work we present results concerning in beam operation of the new Resistive Plate ... more ABSTRACT In this work we present results concerning in beam operation of the new Resistive Plate Chamber (RPC) Time of Flight (TOF) wall for the High Acceptance DiElectron Spectrometer (HADES) at the Society for Heavy Ion Research (GSI), Darmstadt, Germany. The new RPC-TOF wall, fully integrated in the spectrometer, has been successfully operated under final conditions corresponding to collision of Au + Au at 1.25 AGeV. Results confirm an intrinsic uniform average time response of about 66 ps sigma along with an intrinsic average longitudinal position resolution better than 8 mm sigma, for particles with a momentum above 300 MeV/c selected with the tracking system of the spectrometer. The multihit capability of the system has also been investigated showing a slight degradation of time resolution when particles hit the detector at neighbouring cells. The matching efficiency of the RPC-TOF wall is quite homogeneous over the whole area showing an average value of about 95%
... Republic), AB(II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, G... more ... Republic), AB(II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany), AC(Istituto Nazionale di Fisica Nucleare-Laboratori Nazionali del Sud, 95125 Catania, Italy), AD(Departamento de Fisica de Particulas, University of Santiago de Compostela ...
ABSTRACT The HADES spectrometer installed at GSI Darmstadt is devoted to the study of the product... more ABSTRACT The HADES spectrometer installed at GSI Darmstadt is devoted to the study of the production of di- lepton pairs from vector meson decays in relativistic nucleus-nucleus collisions, as well as proton- and pion-induced reactions. Extraction of rare lepton pairs in high hadron multiplicity events requires an efficient particle identification ( PID). In HADES charged particles momentum is measured by a tracking system surrounding the toroidal super conducting magnet, and velocity and energy loss is provided by a TOF detector. Leptons are identified by a Rich as well as a Shower detector. The particle identification method is using full experimental information from all subdetectors. To demonstrate the method performance, single particle spectra of charged hadrons and leptons from C+C at 2 A GeV will be presented and compared with results of corresponding simulations. The proton and pion yields an m T and rapidity distributions will be compared with existing data. Very preliminary results of lepton analysis will be shown as well.
A. Akindinov, V. Ammosov, E. Badura, M. Ciobanu, E. Cordier, F. Dohrmann, R. Ferreira Marques, P.... more A. Akindinov, V. Ammosov, E. Badura, M. Ciobanu, E. Cordier, F. Dohrmann, R. Ferreira Marques, P. Fonte, J. Garzon, D. Gonzalez-Diaz, Y. Grishuk, F. Guber, N. Herrmann, O. Karavichev, S. Kiselev, K. Koch, B. Kohlmeyer, R. Kotte, A. Kuznetsov, A. Maevskaia, A. Mangiarotti, A. Martemiyanov, M. Petrovici, A. Policarpo, V. Rasin, A. Schüttauf, A. Semak, A. Smirnitskiy, G. Stoicea, Y. Sviridov, V. Tiflov, K. Voloshin, V. Zaets, B. Zagreev, and the CBM Collaboration 1 National Institute for Physics and Nuclear Engineering, Bucharest, Romania; 2 LIP, Coimbra, Portugal; 3 GSI, Darmstadt, Germany; 4 Physikalisches Institut, Universität Heidelberg, Germany; 5 Fachbereich Physik, Universität Marburg, Germany; 6 Institute for Nuclear Research, Moscow, Russia; 7 ITEP, Moscow, Russia; 8 IHEP, Protvino, Russia; 9 FZR, Institut für Kernund Hadronenphysik, Rossendorf, Germany; 10 Universidad de Santiago de Compostela, Santiago de Compostela, Spain
The HADES (High Acceptance Di-Electron Spectrometer) is a tool designed for lepton pair (e+ e−) s... more The HADES (High Acceptance Di-Electron Spectrometer) is a tool designed for lepton pair (e+ e−) spectroscopy in pion, proton and heavy ion induced reactions in the 1–2AGeV energy range. One of the goals of the HADES experiment is to study in-medium ...
Journal of Physics G: Nuclear and Particle Physics, 2005
The high-acceptance dielectron spectrometer (HADES) has become operational at GSI Darmstadt. The ... more The high-acceptance dielectron spectrometer (HADES) has become operational at GSI Darmstadt. The primary physics programme is to study in-medium changes of light vector mesons via their e+ e− decays. The methods of dilepton signal reconstruction in the ...
ABSTRACT In this work we present results concerning in beam operation of the new Resistive Plate ... more ABSTRACT In this work we present results concerning in beam operation of the new Resistive Plate Chamber (RPC) Time of Flight (TOF) wall for the High Acceptance DiElectron Spectrometer (HADES) at the Society for Heavy Ion Research (GSI), Darmstadt, Germany. The new RPC-TOF wall, fully integrated in the spectrometer, has been successfully operated under final conditions corresponding to collision of Au + Au at 1.25 AGeV. Results confirm an intrinsic uniform average time response of about 66 ps sigma along with an intrinsic average longitudinal position resolution better than 8 mm sigma, for particles with a momentum above 300 MeV/c selected with the tracking system of the spectrometer. The multihit capability of the system has also been investigated showing a slight degradation of time resolution when particles hit the detector at neighbouring cells. The matching efficiency of the RPC-TOF wall is quite homogeneous over the whole area showing an average value of about 95%
... Republic), AB(II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, G... more ... Republic), AB(II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany), AC(Istituto Nazionale di Fisica Nucleare-Laboratori Nazionali del Sud, 95125 Catania, Italy), AD(Departamento de Fisica de Particulas, University of Santiago de Compostela ...
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