Physics Letters B (Aug 2021)
Correlated pion-proton pair emission off hot and dense QCD matter
- J. Adamczewski-Musch,
- O. Arnold,
- C. Behnke,
- A. Belounnas,
- A. Belyaev,
- J.C. Berger-Chen,
- A. Blanco,
- C. Blume,
- M. Böhmer,
- P. Bordalo,
- S. Chernenko,
- L. Chlad,
- I. Ciepał,
- C. Deveaux,
- J. Dreyer,
- E. Epple,
- L. Fabbietti,
- O. Fateev,
- P. Filip,
- P. Fonte,
- C. Franco,
- J. Friese,
- I. Fröhlich,
- T. Galatyuk,
- J.A. Garzón,
- R. Gernhäuser,
- M. Golubeva,
- R. Greifenhagen,
- F. Guber,
- M. Gumberidze,
- S. Harabasz,
- T. Heinz,
- T. Hennino,
- S. Hlavac,
- C. Höhne,
- R. Holzmann,
- A. Ierusalimov,
- A. Ivashkin,
- B. Kämpfer,
- T. Karavicheva,
- B. Kardan,
- I. Koenig,
- W. Koenig,
- M. Kohls,
- B.W. Kolb,
- G. Korcyl,
- G. Kornakov,
- F. Kornas,
- R. Kotte,
- A. Kugler,
- T. Kunz,
- A. Kurepin,
- A. Kurilkin,
- P. Kurilkin,
- V. Ladygin,
- R. Lalik,
- K. Lapidus,
- A. Lebedev,
- L. Lopes,
- M. Lorenz,
- T. Mahmoud,
- L. Maier,
- A. Malige,
- A. Mangiarotti,
- J. Markert,
- T. Matulewicz,
- S. Maurus,
- V. Metag,
- J. Michel,
- D.M. Mihaylov,
- S. Morozov,
- C. Müntz,
- R. Münzer,
- L. Naumann,
- K. Nowakowski,
- Y. Parpottas,
- V. Pechenov,
- O. Pechenova,
- O. Petukhov,
- K. Piasecki,
- J. Pietraszko,
- W. Przygoda,
- K. Pysz,
- S. Ramos,
- B. Ramstein,
- N. Rathod,
- A. Reshetin,
- P. Rodriguez-Ramos,
- P. Rosier,
- A. Rost,
- A. Sadovsky,
- P. Salabura,
- T. Scheib,
- H. Schuldes,
- E. Schwab,
- F. Scozzi,
- F. Seck,
- P. Sellheim,
- I. Selyuzhenkov,
- J. Siebenson,
- L. Silva,
- U. Singh,
- J. Smyrski,
- Yu.G. Sobolev,
- S. Spataro,
- S. Spies,
- H. Ströbele,
- J. Stroth,
- C. Sturm,
- O. Svoboda,
- M. Szala,
- P. Tlusty,
- M. Traxler,
- H. Tsertos,
- E. Usenko,
- V. Wagner,
- C. Wendisch,
- M.G. Wiebusch,
- J. Wirth,
- D. Wójcik,
- Y. Zanevsky,
- P. Zumbruch
Affiliations
- J. Adamczewski-Musch
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- O. Arnold
- Physik Department E62, Technische Universität München, 85748 Garching, Germany; Excellence Cluster ‘Origin and Structure of the Universe’, 85748 Garching, Germany
- C. Behnke
- Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany
- A. Belounnas
- Laboratoire de Physique des 2 infinis Irène Joliot-Curie, Université Paris-Saclay, CNRS-IN2P3, F-91405 Orsay, France
- A. Belyaev
- Joint Institute of Nuclear Research, 141980 Dubna, Russia
- J.C. Berger-Chen
- Physik Department E62, Technische Universität München, 85748 Garching, Germany; Excellence Cluster ‘Origin and Structure of the Universe’, 85748 Garching, Germany
- A. Blanco
- LIP-Laboratório de Instrumentação e Física Experimental de Partículas, 3004-516 Coimbra, Portugal
- C. Blume
- Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany
- M. Böhmer
- Physik Department E62, Technische Universität München, 85748 Garching, Germany
- P. Bordalo
- LIP-Laboratório de Instrumentação e Física Experimental de Partículas, 3004-516 Coimbra, Portugal
- S. Chernenko
- Joint Institute of Nuclear Research, 141980 Dubna, Russia
- L. Chlad
- Nuclear Physics Institute, The Czech Academy of Sciences, 25068 Rez, Czech Republic
- I. Ciepał
- Institute of Nuclear Physics, Polish Academy of Sciences, 31342 Kraków, Poland
- C. Deveaux
- II. Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
- J. Dreyer
- Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
- E. Epple
- Physik Department E62, Technische Universität München, 85748 Garching, Germany; Excellence Cluster ‘Origin and Structure of the Universe’, 85748 Garching, Germany
- L. Fabbietti
- Physik Department E62, Technische Universität München, 85748 Garching, Germany; Excellence Cluster ‘Origin and Structure of the Universe’, 85748 Garching, Germany
- O. Fateev
- Joint Institute of Nuclear Research, 141980 Dubna, Russia
- P. Filip
- Institute of Physics, Slovak Academy of Sciences, 84228 Bratislava, Slovakia
- P. Fonte
- LIP-Laboratório de Instrumentação e Física Experimental de Partículas, 3004-516 Coimbra, Portugal
- C. Franco
- LIP-Laboratório de Instrumentação e Física Experimental de Partículas, 3004-516 Coimbra, Portugal
- J. Friese
- Physik Department E62, Technische Universität München, 85748 Garching, Germany
- I. Fröhlich
- Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany
- T. Galatyuk
- Technische Universität Darmstadt, 64289 Darmstadt, Germany; GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- J.A. Garzón
- LabCAF, Facultad de Física, Universidad de Santiago de Compostela, 15706 Santiago de Compostela, Spain
- R. Gernhäuser
- Physik Department E62, Technische Universität München, 85748 Garching, Germany
- M. Golubeva
- Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
- R. Greifenhagen
- Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
- F. Guber
- Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
- M. Gumberidze
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- S. Harabasz
- Technische Universität Darmstadt, 64289 Darmstadt, Germany; GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- T. Heinz
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- T. Hennino
- Laboratoire de Physique des 2 infinis Irène Joliot-Curie, Université Paris-Saclay, CNRS-IN2P3, F-91405 Orsay, France
- S. Hlavac
- Institute of Physics, Slovak Academy of Sciences, 84228 Bratislava, Slovakia
- C. Höhne
- II. Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany; GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- R. Holzmann
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- A. Ierusalimov
- Joint Institute of Nuclear Research, 141980 Dubna, Russia
- A. Ivashkin
- Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
- B. Kämpfer
- Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
- T. Karavicheva
- Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
- B. Kardan
- Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany
- I. Koenig
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- W. Koenig
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- M. Kohls
- Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany
- B.W. Kolb
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- G. Korcyl
- Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
- G. Kornakov
- Technische Universität Darmstadt, 64289 Darmstadt, Germany
- F. Kornas
- Technische Universität Darmstadt, 64289 Darmstadt, Germany
- R. Kotte
- Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
- A. Kugler
- Nuclear Physics Institute, The Czech Academy of Sciences, 25068 Rez, Czech Republic
- T. Kunz
- Physik Department E62, Technische Universität München, 85748 Garching, Germany
- A. Kurepin
- Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
- A. Kurilkin
- Joint Institute of Nuclear Research, 141980 Dubna, Russia
- P. Kurilkin
- Joint Institute of Nuclear Research, 141980 Dubna, Russia
- V. Ladygin
- Joint Institute of Nuclear Research, 141980 Dubna, Russia
- R. Lalik
- Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
- K. Lapidus
- Physik Department E62, Technische Universität München, 85748 Garching, Germany; Excellence Cluster ‘Origin and Structure of the Universe’, 85748 Garching, Germany
- A. Lebedev
- Institute of Theoretical and Experimental Physics, 117218 Moscow, Russia
- L. Lopes
- LIP-Laboratório de Instrumentação e Física Experimental de Partículas, 3004-516 Coimbra, Portugal
- M. Lorenz
- Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany
- T. Mahmoud
- II. Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
- L. Maier
- Physik Department E62, Technische Universität München, 85748 Garching, Germany
- A. Malige
- Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
- A. Mangiarotti
- LIP-Laboratório de Instrumentação e Física Experimental de Partículas, 3004-516 Coimbra, Portugal
- J. Markert
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- T. Matulewicz
- Uniwersytet Warszawski - Instytut Fizyki Doświadczalnej, 02-093 Warszawa, Poland
- S. Maurus
- Physik Department E62, Technische Universität München, 85748 Garching, Germany
- V. Metag
- II. Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
- J. Michel
- Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany
- D.M. Mihaylov
- Physik Department E62, Technische Universität München, 85748 Garching, Germany; Excellence Cluster ‘Origin and Structure of the Universe’, 85748 Garching, Germany
- S. Morozov
- Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409 Moscow, Russia
- C. Müntz
- Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany
- R. Münzer
- Physik Department E62, Technische Universität München, 85748 Garching, Germany; Excellence Cluster ‘Origin and Structure of the Universe’, 85748 Garching, Germany
- L. Naumann
- Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
- K. Nowakowski
- Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
- Y. Parpottas
- Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
- V. Pechenov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- O. Pechenova
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- O. Petukhov
- Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
- K. Piasecki
- Uniwersytet Warszawski - Instytut Fizyki Doświadczalnej, 02-093 Warszawa, Poland
- J. Pietraszko
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- W. Przygoda
- Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
- K. Pysz
- Institute of Nuclear Physics, Polish Academy of Sciences, 31342 Kraków, Poland
- S. Ramos
- LIP-Laboratório de Instrumentação e Física Experimental de Partículas, 3004-516 Coimbra, Portugal
- B. Ramstein
- Laboratoire de Physique des 2 infinis Irène Joliot-Curie, Université Paris-Saclay, CNRS-IN2P3, F-91405 Orsay, France
- N. Rathod
- Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
- A. Reshetin
- Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
- P. Rodriguez-Ramos
- Nuclear Physics Institute, The Czech Academy of Sciences, 25068 Rez, Czech Republic
- P. Rosier
- Laboratoire de Physique des 2 infinis Irène Joliot-Curie, Université Paris-Saclay, CNRS-IN2P3, F-91405 Orsay, France
- A. Rost
- Technische Universität Darmstadt, 64289 Darmstadt, Germany
- A. Sadovsky
- Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
- P. Salabura
- Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
- T. Scheib
- Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany
- H. Schuldes
- Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany
- E. Schwab
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- F. Scozzi
- Technische Universität Darmstadt, 64289 Darmstadt, Germany; Laboratoire de Physique des 2 infinis Irène Joliot-Curie, Université Paris-Saclay, CNRS-IN2P3, F-91405 Orsay, France
- F. Seck
- Technische Universität Darmstadt, 64289 Darmstadt, Germany
- P. Sellheim
- Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany
- I. Selyuzhenkov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409 Moscow, Russia
- J. Siebenson
- Physik Department E62, Technische Universität München, 85748 Garching, Germany
- L. Silva
- LIP-Laboratório de Instrumentação e Física Experimental de Partículas, 3004-516 Coimbra, Portugal
- U. Singh
- Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
- J. Smyrski
- Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
- Yu.G. Sobolev
- Nuclear Physics Institute, The Czech Academy of Sciences, 25068 Rez, Czech Republic
- S. Spataro
- Dipartimento di Fisica and INFN, Università di Torino, 10125 Torino, Italy
- S. Spies
- Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany
- H. Ströbele
- Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany
- J. Stroth
- Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany; GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- C. Sturm
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- O. Svoboda
- Nuclear Physics Institute, The Czech Academy of Sciences, 25068 Rez, Czech Republic
- M. Szala
- Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany
- P. Tlusty
- Nuclear Physics Institute, The Czech Academy of Sciences, 25068 Rez, Czech Republic
- M. Traxler
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- H. Tsertos
- Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
- E. Usenko
- Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
- V. Wagner
- Nuclear Physics Institute, The Czech Academy of Sciences, 25068 Rez, Czech Republic
- C. Wendisch
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- M.G. Wiebusch
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- J. Wirth
- Physik Department E62, Technische Universität München, 85748 Garching, Germany; Excellence Cluster ‘Origin and Structure of the Universe’, 85748 Garching, Germany
- D. Wójcik
- Uniwersytet Warszawski - Instytut Fizyki Doświadczalnej, 02-093 Warszawa, Poland
- Y. Zanevsky
- Joint Institute of Nuclear Research, 141980 Dubna, Russia
- P. Zumbruch
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- Journal volume & issue
-
Vol. 819
p. 136421
Abstract
In this letter we report the first multi-differential measurement of correlated pion-proton pairs from 2 billion Au+Au collisions at sNN=2.42 GeV collected with HADES. In this energy regime the population of Δ(1232) resonances plays an important role in the way energy is distributed between intrinsic excitation energy and kinetic energy of the hadrons in the fireball. The triple differential d3N/dMπ±pdpTdy distributions of correlated π±p pairs have been determined by subtracting the πp combinatorial background using an iterative method. The invariant-mass distributions in the Δ(1232) mass region show strong deviations from a Breit-Wigner function with vacuum width and mass. The yield of correlated pion-proton pairs exhibits a complex isospin, rapidity and transverse-momentum dependence. In the invariant mass range 1.1<Minv(GeV/c2)<1.4, the yield is found to be similar for π+p and π−p pairs, and to follow a power law 〈Apart〉α, where 〈Apart〉 is the mean number of participating nucleons. The exponent α depends strongly on the pair transverse momentum (pT) while its pT-integrated and charge-averaged value is α=1.5±0.08st±0.2sy.
