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24 results on '"BOYARD, JL"'

1. Coherent pion production in heavy ion charge exchange reactions.

Author

Boyard, JL, Augustyniak, W, Dahl, R, Drews, M, Ellegaard, C, Farhi, L, Gaarde, C, Hennino, T, Jensen, JA, Jourdain, JC, Kagarlis, M, Kunne, R, Larsen, JS, Radvadyi, P, Ramstein, B, Roy-Stephan, M, Zupranski, P, Boyard, JL, Augustyniak, W, Dahl, R, Drews, M, Ellegaard, C, Farhi, L, Gaarde, C, Hennino, T, Jensen, JA, Jourdain, JC, Kagarlis, M, Kunne, R, Larsen, JS, Radvadyi, P, Ramstein, B, Roy-Stephan, M, and Zupranski, P

Published
2005

2. SPES4-pi:installation for exclusive study of nuclear reactions

Author

Alkhazov, GD, Astashin, VV, Atamanchuk, AG, Augustyniak, W, Bachelier, D, Baublis, VV, Boivin, M, Boyard, JL, Clavelin, JF, Courtat, P, Denoit, M, Douet, R, Ellegaard, C, Farhi, L, Gaarde, C, Gacougnolle, R, Gerzenstein, VY, Golovtsov, VL, Golubev, VV, Hennino, T, Jourdain, JC, Khanzadeev, A, Komkov, BG, Kravtsov, AV, Kudin, LG, Kunne, R, Larsen, J, Lebon, S, Malinina, LV, Maroni, A, Martin, JM, Morsch, HP, Mylnikov, VA, Orischin, EM, Osterlund, M, Poux, V, Prokofiev, AN, Radvanyi, P, Ramstein, B, Razmyslovich, BV, Roy-Stephan, M, Samsonov, VM, Skowron, R, Smirnov, IB, Strokovsky, EA, Tkach, II, Vikhrov, VV, Volkov, SS, Vorobyov, AA, Zhdanov, AA, Zupranski, P, Alkhazov, GD, Astashin, VV, Atamanchuk, AG, Augustyniak, W, Bachelier, D, Baublis, VV, Boivin, M, Boyard, JL, Clavelin, JF, Courtat, P, Denoit, M, Douet, R, Ellegaard, C, Farhi, L, Gaarde, C, Gacougnolle, R, Gerzenstein, VY, Golovtsov, VL, Golubev, VV, Hennino, T, Jourdain, JC, Khanzadeev, A, Komkov, BG, Kravtsov, AV, Kudin, LG, Kunne, R, Larsen, J, Lebon, S, Malinina, LV, Maroni, A, Martin, JM, Morsch, HP, Mylnikov, VA, Orischin, EM, Osterlund, M, Poux, V, Prokofiev, AN, Radvanyi, P, Ramstein, B, Razmyslovich, BV, Roy-Stephan, M, Samsonov, VM, Skowron, R, Smirnov, IB, Strokovsky, EA, Tkach, II, Vikhrov, VV, Volkov, SS, Vorobyov, AA, Zhdanov, AA, and Zupranski, P

Published
2005

3. Analyzing powers of inelastic dp scattering in the energy region of Delta and Roper resonances excitation

Author

Malinina, LV, Alkhazov, GD, Augustyniak, W, Boivin, M, Boyard, JL, Dahl, R, Drews, M, Ellegaard, C, Fahri, L, Gaarde, C, Hennino, T, Jourdain, JC, Kagarlis, M, Kravtsov, AV, Kunne, R, Larsen, JS, Morsch, P, Mylnikov, VA, Orischin, EA, Perdrisat, CF, Piskunov, NM, Prokofiev, AN, Punjabi, V, Radvanyi, P, Ramstein, B, Razmyslovich, BV, Roy-Stephan, M, Sitnik, IM, Skousen, M, Strokovsky, EA, Tkach, II, Tomasi-Gustafsson, E, Volkov, SS, Zhdanov, AA, Zupranski, P, Malinina, LV, Alkhazov, GD, Augustyniak, W, Boivin, M, Boyard, JL, Dahl, R, Drews, M, Ellegaard, C, Fahri, L, Gaarde, C, Hennino, T, Jourdain, JC, Kagarlis, M, Kravtsov, AV, Kunne, R, Larsen, JS, Morsch, P, Mylnikov, VA, Orischin, EA, Perdrisat, CF, Piskunov, NM, Prokofiev, AN, Punjabi, V, Radvanyi, P, Ramstein, B, Razmyslovich, BV, Roy-Stephan, M, Sitnik, IM, Skousen, M, Strokovsky, EA, Tkach, II, Tomasi-Gustafsson, E, Volkov, SS, Zhdanov, AA, and Zupranski, P

Published
2001

4. Exploring the collective spin-isospin longitudinal response of nuclei with coherent pion production in (He-3, t pi(+))

Author

Boyard, JL, Farhi, L, Hennino, T, Jourdain, JC, Kunne, R, Radvanyi, P, Ramstein, B, Roy-Stephan, M, Dahl, R, Drews, M, Ellegaard, C, Gaarde, C, Jensen, J, Skousen, M, Kagarlis, MA, Augustyniak, W, Zupranski, P, Boyard, JL, Farhi, L, Hennino, T, Jourdain, JC, Kunne, R, Radvanyi, P, Ramstein, B, Roy-Stephan, M, Dahl, R, Drews, M, Ellegaard, C, Gaarde, C, Jensen, J, Skousen, M, Kagarlis, MA, Augustyniak, W, and Zupranski, P

Published
2000

5. Inclusive H-2(He-3,t) reaction at 2 GeV

Author

Ramstein, B, Mosbacher, CA, Bachelier, D, Berquist, I, Boivin, M, Boyard, JL, Brockstedt, A, Carlen, L, Dahl, R, Ekstrom, P, Ellegaard, C, Gaarde, C, Hennino, T, Jourdain, JC, Goodman, C, Larsen, JS, Radvanyi, P, Roy-Stephan, M, Ramstein, B, Mosbacher, CA, Bachelier, D, Berquist, I, Boivin, M, Boyard, JL, Brockstedt, A, Carlen, L, Dahl, R, Ekstrom, P, Ellegaard, C, Gaarde, C, Hennino, T, Jourdain, JC, Goodman, C, Larsen, JS, Radvanyi, P, and Roy-Stephan, M

Published
1999

6. Spallation neutron spectra measurements .1. Time-of-flight technique

Author

Borne, F, Crespin, S, Leray, S, Patin, Y, Beau, M, Boudard, A, Boue, F, Bouyer, P, Boyard, JL, Brochard, F, Drake, D, Duchazeaubeneix, JC, Durand, JM, Frehaut, J, Kowalski, L, Legrain, R, Lochard, JP, Martinez, E, Menard, S, Milleret, G, Petibon, E, Plouin, E, Terrien, Y, Thun, Borne, F, Crespin, S, Leray, S, Patin, Y, Beau, M, Boudard, A, Boue, F, Bouyer, P, Boyard, JL, Brochard, F, Drake, D, Duchazeaubeneix, JC, Durand, JM, Frehaut, J, Kowalski, L, Legrain, R, Lochard, JP, Martinez, E, Menard, S, Milleret, G, Petibon, E, Plouin, E, Terrien, Y, and Thun

Abstract

We present an experimental method based on a time-of-flight technique between the tagged incident particles and a thick liquid NE213 scintillator to measure neutron energy spectra from 3 to 400 MeV at the Saturne synchrotron of Saclay. Efficiency measurem, Addresses: Borne F, CEA, SPN, DPTA, BRUYERES CHATEL, FRANCE. LAB NATL SATURNE, SACLAY, FRANCE. SPHN, DAPNIA, SACLAY, FRANCE. IPN, ORSAY, FRANCE. UPPSALA UNIV, UPPSALA, SWEDEN. MONTCLAIR STATE UNIV, MONTCLAIR, NJ 07043.

Published
1997

7. Spallation neutron spectra measurements .2. Proton recoil spectrometer

Author

Martinez, E, Thun, J, Patin, Y, Leray, S, Beau, M, Boudard, A, Boue, F, Bouyer, P, Boyard, JL, Brochard, F, Crespin, S, Drake, D, Duchazeaubeneix, JC, Durand, JM, Frehaut, J, Kowalski, L, Legrain, R, Lochard, JP, Menard, S, Milleret, G, Petibon, E, Plouin, F, Terrien, Y, Uemats, Martinez, E, Thun, J, Patin, Y, Leray, S, Beau, M, Boudard, A, Boue, F, Bouyer, P, Boyard, JL, Brochard, F, Crespin, S, Drake, D, Duchazeaubeneix, JC, Durand, JM, Frehaut, J, Kowalski, L, Legrain, R, Lochard, JP, Menard, S, Milleret, G, Petibon, E, Plouin, F, Terrien, Y, and Uemats

Abstract

We present the experimental method conceived to measure high energy neutrons in the range (200 less than or equal to E less than or equal to 1600 MeV). The neutrons produce recoil protons in a liquid hydrogen converter. Momentum evaluation and identificat, Addresses: Martinez E, CEA, SPN, DPTA, BRUYERES CHATEL, FRANCE. LAB NATL SATURNE, SACLAY, FRANCE. SPHN, DAPNIA, SACLAY, FRANCE. IPN, ORSAY, FRANCE. UPPSALA UNIV, UPPSALA, SWEDEN. MONTCLAIR STATE UNIV, MONTCLAIR, NJ 07043.

Published
1997

8. Delta Production and propagation in nuclei

Author

Ramstein, B, Rousteau, S, Hennino, T, Boyard, JL, Dahl, R, Ellegaard, C, Gaarde, C, Gosset, J, Jourdain, JC, Kagarlis, M, Larsen, JS, Lemaire, MC, LHote, D, Morsch, HP, Osterlund, M, Radvanyi, P, RoyStephan, M, Sams, T, Skousen, M, Spang, W, Zupranski, P, Ramstein, B, Rousteau, S, Hennino, T, Boyard, JL, Dahl, R, Ellegaard, C, Gaarde, C, Gosset, J, Jourdain, JC, Kagarlis, M, Larsen, JS, Lemaire, MC, LHote, D, Morsch, HP, Osterlund, M, Radvanyi, P, RoyStephan, M, Sams, T, Skousen, M, Spang, W, and Zupranski, P

Published
1996

9. Coherent production of pions in nuclei with (He-3,t) charge exchange reaction at 2 GeV

Author

Farhi, L, RoyStephan, M, Augustiniak, W, Boyard, JL, Dahl, R, Ellegaard, C, Gaarde, C, Hennino, T, Jourdain, JC, Kagarlis, M, Larsen, JS, Radvanyi, P, Ramstein, B, Skousen, M, Zupranski, P, Farhi, L, RoyStephan, M, Augustiniak, W, Boyard, JL, Dahl, R, Ellegaard, C, Gaarde, C, Hennino, T, Jourdain, JC, Kagarlis, M, Larsen, JS, Radvanyi, P, Ramstein, B, Skousen, M, and Zupranski, P

Published
1996

10. QUASI-FREE ((D)OVER-RIGHT-ARROW, HE-2) DATA

Author

SAMS, T, ELLEGAARD, C, GAARDE, C, LARSEN, JS, BOYARD, JL, HENNINO, T, JOURDAIN, JC, RAMSTEIN, B, ROYSTEPHAN, M, RADVANYI, P, BROCKSTEDT, A, OSTERLUND, M, ZUPRANSKI, P, GOODMAN, CD, ICHIMURA, M, DMITRIEV, VF, SAMS, T, ELLEGAARD, C, GAARDE, C, LARSEN, JS, BOYARD, JL, HENNINO, T, JOURDAIN, JC, RAMSTEIN, B, ROYSTEPHAN, M, RADVANYI, P, BROCKSTEDT, A, OSTERLUND, M, ZUPRANSKI, P, GOODMAN, CD, ICHIMURA, M, and DMITRIEV, VF

Published
1995

11. DELTA-RESONANCE DECAY AND ABSORPTION IN NUCLEI

Author

ROUSTEAU, S, HENNINO, T, RAMSTEIN, B, BOYARD, JL, ELLEGAARD, C, GAARDE, C, GOSSET, J, JOURDAIN, JC, KAGARLIS, M, LARSEN, JS, LEMAIRE, MC, LHOTE, D, MORSCH, HP, OSTERLUND, M, POITOU, J, RADVANYI, P, ROYSTEPHAN, M, SAMS, T, ZUPRANSKI, P, ROUSTEAU, S, HENNINO, T, RAMSTEIN, B, BOYARD, JL, ELLEGAARD, C, GAARDE, C, GOSSET, J, JOURDAIN, JC, KAGARLIS, M, LARSEN, JS, LEMAIRE, MC, LHOTE, D, MORSCH, HP, OSTERLUND, M, POITOU, J, RADVANYI, P, ROYSTEPHAN, M, SAMS, T, and ZUPRANSKI, P

Published
1993

12. COHERENT PIONS IN CHARGE-EXCHANGE REACTIONS

Author

HENNINO, T, RAMSTEIN, B, BACHELIER, D, BOYARD, JL, ELLEGAARD, C, GAARDE, C, GOSSET, J, JOURDAIN, JC, LARSEN, JS, LEMAIRE, MC, LHOTE, D, MORSCH, HP, OSTERLUND, M, POITOU, J, RADVANYI, P, ROUSTEAU, S, ROYSTEPHAN, M, SAMS, T, ZUPRANSKI, P, HENNINO, T, RAMSTEIN, B, BACHELIER, D, BOYARD, JL, ELLEGAARD, C, GAARDE, C, GOSSET, J, JOURDAIN, JC, LARSEN, JS, LEMAIRE, MC, LHOTE, D, MORSCH, HP, OSTERLUND, M, POITOU, J, RADVANYI, P, ROUSTEAU, S, ROYSTEPHAN, M, SAMS, T, and ZUPRANSKI, P

Published
1993

13. STUDY OF DECAY AND ABSORPTION OF THE DELTA-RESONANCE IN NUCLEI WITH A 4-PI DETECTOR

Author

HENNINO, T, RAMSTEIN, B, BACHELIER, D, BOHLEN, HG, BOYARD, JL, ELLEGAARD, C, GAARDE, C, GOSSET, J, JOURDAIN, JC, LARSEN, JS, LEMAIRE, MC, LHOTE, D, MORSCH, HP, OSTERLUND, M, POITOU, J, RADVANYI, P, ROYSTEPHAN, M, SAMS, T, SNEPPEN, K, VALETTE, O, ZUPRANSKI, P, HENNINO, T, RAMSTEIN, B, BACHELIER, D, BOHLEN, HG, BOYARD, JL, ELLEGAARD, C, GAARDE, C, GOSSET, J, JOURDAIN, JC, LARSEN, JS, LEMAIRE, MC, LHOTE, D, MORSCH, HP, OSTERLUND, M, POITOU, J, RADVANYI, P, ROYSTEPHAN, M, SAMS, T, SNEPPEN, K, VALETTE, O, and ZUPRANSKI, P

Published
1992

14. SPIN STRUCTURE OF THE DELTA-EXCITATION

Author

ELLEGAARD, C, GAARDE, C, JORGENSEN, TS, LARSEN, JS, MILLION, B, GOODMAN, C, BROCKSTEDT, A, EKSTROM, P, OSTERLUND, M, BEDJIDIAN, M, CONTARDO, D, BACHELIER, D, BOYARD, JL, HENNINO, T, JOURDAIN, JC, ROYSTEPHAN, M, RADVANYI, P, ZUPRANSKI, P, ELLEGAARD, C, GAARDE, C, JORGENSEN, TS, LARSEN, JS, MILLION, B, GOODMAN, C, BROCKSTEDT, A, EKSTROM, P, OSTERLUND, M, BEDJIDIAN, M, CONTARDO, D, BACHELIER, D, BOYARD, JL, HENNINO, T, JOURDAIN, JC, ROYSTEPHAN, M, RADVANYI, P, and ZUPRANSKI, P

Published
1989

15. REACTION (DPOL, HE-2) AT INTERMEDIATE ENERGIES

Author

ELLEGAARD, C, GAARDE, C, JORGENSEN, TS, LARSEN, JS, GOODMAN, C, BERGQVIST, I, BROCKSTEDT, A, EKSTROM, P, BEDJIDIAN, M, CONTARDO, D, GROSSIORD, JY, GUICHARD, A, BACHELIER, D, BOYARD, JL, HENNINO, T, JOURDAIN, JC, ROYSTEPHAN, M, RADVANYI, P, TINSLEY, J, ELLEGAARD, C, GAARDE, C, JORGENSEN, TS, LARSEN, JS, GOODMAN, C, BERGQVIST, I, BROCKSTEDT, A, EKSTROM, P, BEDJIDIAN, M, CONTARDO, D, GROSSIORD, JY, GUICHARD, A, BACHELIER, D, BOYARD, JL, HENNINO, T, JOURDAIN, JC, ROYSTEPHAN, M, RADVANYI, P, and TINSLEY, J

Published
1987

16. STUDY OF THE DELTA-ISOBAR EXCITATION IN NUCLEI WITH THE (HE-3,T) REACTION

Author

CONTARDO, D, BEDJIDIAN, M, GROSSIORD, JY, GUICHARD, A, HAROUTUNIAN, R, PIZZI, JR, ELLEGAARD, C, GAARDE, C, LARSEN, JS, GOODMAN, C, BERGQVIST, I, BROCKSTEDT, A, CARLEN, L, EKSTROM, P, BACHELIER, D, BOYARD, JL, HENNINO, T, JOURDAIN, JC, ROYSTEPHAN, M, BOIVIN, M, RADVANYI, P, CONTARDO, D, BEDJIDIAN, M, GROSSIORD, JY, GUICHARD, A, HAROUTUNIAN, R, PIZZI, JR, ELLEGAARD, C, GAARDE, C, LARSEN, JS, GOODMAN, C, BERGQVIST, I, BROCKSTEDT, A, CARLEN, L, EKSTROM, P, BACHELIER, D, BOYARD, JL, HENNINO, T, JOURDAIN, JC, ROYSTEPHAN, M, BOIVIN, M, and RADVANYI, P

Published
1986

17. EXCITATION OF THE DELTA-RESONANCE IN RELATIVISTIC HEAVY-ION CHARGE-EXCHANGE REACTIONS

Author

ROYSTEPHAN, M, BACHELIER, D, BOYARD, JL, CONTARDO, D, ELLEGAARD, C, GAARDE, C, GROSSIORD, JY, GUICHARD, A, HENNINO, T, JOURDAIN, JC, LARSEN, JS, PIZZI, JR, RADVANYI, P, TINSLEY, J, ROYSTEPHAN, M, BACHELIER, D, BOYARD, JL, CONTARDO, D, ELLEGAARD, C, GAARDE, C, GROSSIORD, JY, GUICHARD, A, HENNINO, T, JOURDAIN, JC, LARSEN, JS, PIZZI, JR, RADVANYI, P, and TINSLEY, J

Published
1986

18. THE (HE-3,T) REACTION AT INTERMEDIATE ENERGIES - SPIN-ISOSPIN TRANSITIONS TO STATES IN N-12 AND N-13

Author

BERGQVIST, I, BROCKSTEDT, A, CARLEN, L, EKSTROM, LP, JAKOBSSON, B, ELLEGAARD, C, GAARDE, C, LARSEN, JS, GOODMAN, C, BEDJIDIAN, M, CONTARDO, D, GROSSIORD, JY, GUICHARD, A, HAROUTUNIAN, R, PIZZI, JR, BACHELIER, D, BOYARD, JL, HENNINO, T, JOURDAIN, JC, ROYSTEPHAN, M, BOIVIN, M, RADVANYI, P, BERGQVIST, I, BROCKSTEDT, A, CARLEN, L, EKSTROM, LP, JAKOBSSON, B, ELLEGAARD, C, GAARDE, C, LARSEN, JS, GOODMAN, C, BEDJIDIAN, M, CONTARDO, D, GROSSIORD, JY, GUICHARD, A, HAROUTUNIAN, R, PIZZI, JR, BACHELIER, D, BOYARD, JL, HENNINO, T, JOURDAIN, JC, ROYSTEPHAN, M, BOIVIN, M, and RADVANYI, P

Published
1987

19. 1ST OBSERVATION OF THE DELTA-RESONANCE IN RELATIVISTIC HEAVY-ION CHARGE-EXCHANGE REACTIONS

Author

BACHELIER, D, BOYARD, JL, HENNINO, T, JOURDAIN, JC, ROYSTEPHAN, M, CONTARDO, D, GROSSIORD, JY, GUICHARD, A, PIZZI, JR, RADVANYI, P, TINSLEY, J, ELLEGAARD, C, GAARDE, C, LARSEN, JS, BACHELIER, D, BOYARD, JL, HENNINO, T, JOURDAIN, JC, ROYSTEPHAN, M, CONTARDO, D, GROSSIORD, JY, GUICHARD, A, PIZZI, JR, RADVANYI, P, TINSLEY, J, ELLEGAARD, C, GAARDE, C, and LARSEN, JS

Published
1986

20. Subthreshold Ξ^{-} production in collisions of p(3.5  GeV)+Nb.

Author

Agakishiev G, Arnold O, Balanda A, Belver D, Belyaev AV, Berger-Chen JC, Blanco A, Böhmer M, Boyard JL, Cabanelas P, Chernenko S, Dybczak A, Epple E, Fabbietti L, Fateev OV, Finocchiaro P, Fonte P, Friese J, Fröhlich I, Galatyuk T, Garzón JA, Gernhäuser R, Göbel K, 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, Karavicheva T, Koenig I, Koenig W, Kolb BW, Kornakov G, Kotte R, Krása A, Krizek F, Krücken R, Kuc H, Kühn W, Kugler A, Kurepin A, Ladygin V, Lalik R, Lang S, Lapidus K, Lebedev A, Liu T, Lopes L, Lorenz M, Maier L, Mangiarotti A, Markert J, Metag V, Michalska B, Michel J, Müntz C, Müntzer R, Naumann L, 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, Vasiliev T, Wagner V, Weber M, Wendisch C, Wüstenfeld J, Yurevich S, and Zanevsky YV

Abstract

Results on the production of the double strange cascade hyperon Ξ^{-} are reported for collisions of p(3.5  GeV)+Nb, studied with the High Acceptance Di-Electron Spectrometer (HADES) at SIS18 at GSI Helmholtzzentrum for Heavy-Ion Research, Darmstadt. For the first time, subthreshold Ξ^{-} production is observed in proton-nucleus interactions. Assuming a Ξ^{-} phase-space distribution similar to that of Λ hyperons, the production probability amounts to P_{Ξ^{-}}=[2.0±0.4(stat)±0.3(norm)±0.6(syst)]×10^{-4} resulting in a Ξ^{-}/(Λ+Σ^{0}) ratio of P_{Ξ^{-}}/P_{Λ+Σ^{0}}=[1.2±0.3(stat)±0.4(syst)]×10^{-2}. Available model predictions are significantly lower than the measured Ξ^{-} yield.

Published
2015
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21. Deep subthreshold Xi;{-} production in Ar + KCl reactions at 1.76A GeV.

Author

Agakishiev G, Balanda A, Bassini R, Belver D, Belyaev AV, Blanco A, Böhmer M, 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 OV, Finocchiaro P, Fonte P, Friese J, Fröhlich I, Galatyuk T, Garzón JA, Gernhäuser R, Gil A, Gilardi C, Golubeva M, González-Díaz D, Guber F, Hennino T, Holzmann R, Iori I, Ivashkin A, Jurkovic M, Kämpfer B, Kanaki K, Karavicheva T, Kirschner D, Koenig I, Koenig W, Kolb BW, Kotte R, Krizek F, Krücken R, Kühn W, Kugler A, Kurepin A, Lang S, Lange JS, Lapidus K, Liu T, Lopes L, Lorenz M, Maier L, Mangiarotti A, Markert J, Metag V, Michalska B, Michel J, Mishra D, 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, Roy-Stephan M, Rustamov A, Sadovsky A, Sailer B, Salabura P, Schmah A, Sobolev YG, Spataro S, Spruck B, Ströbele H, Stroth J, Sturm C, Sudol M, Tarantola A, Teilab K, Tlusty P, Traxler M, Trebacz R, Tsertos H, Wagner V, Weber M, Wisniowski M, Wojcik T, Wüstenfeld J, Yurevich S, Zanevsky YV, Zhou P, and Zumbruch P

Abstract

We report first results on a deep subthreshold production of the doubly strange hyperon Xi;{-} in a heavy-ion reaction. At a beam energy of 1.76A GeV the reaction Ar + KCl was studied with the High Acceptance Di-Electron Spectrometer at SIS18/GSI. A high-statistics and high-purity Lambda sample was collected, allowing for the investigation of the decay channel Xi;{-} --> Lambdapi;{-}. The deduced Xi;{-}/(Lambda + Sigma;{0}) production ratio of (5.6 +/- 1.2_{-1.7};{+1.8}) x 10;{-3} is significantly larger than available model predictions.

Published
2009
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22. Dielectron production in 12C+12C collisions at 2A GeV with the HADES spectrometer.

Author

Agakichiev G, Agodi C, Alvarez-Pol H, Bałanda A, Bertini D, Bielcik J, Bellia G, Böhmer M, Bokemeyer H, Boyard JL, Braun-Munzinger P, Cabanelas P, Chernenko S, Christ T, Coniglione R, Cosentino L, Díaz J, Dohrmann F, Durán I, Eberl T, Enghardt W, Fabbietti L, Fateev O, Fernandez C, Finocchiaro P, Friese J, Fröhlich I, Fuentes B, Garabatos C, Garzón JA, Gernhäuser R, Gilardi C, Golubeva M, González-Díaz D, Grosse E, Guber F, Hennino T, Hlavac S, Holzmann R, Homolka J, Ierusalimov A, Iori I, Ivashkin A, Jaskuła M, Jurkovic M, Kagarlis M, Kajetanowicz M, Kämpfer B, Kanaki K, Karavicheva T, Kastenmüller A, Kidoń L, Kienle P, Koenig I, Koenig W, Körner HJ, Kolb BW, Kotte R, Krücken R, Kugler A, Kühn W, Kulessa R, Kurepin A, Lang S, Lange S, Lehnert J, Lins E, Magestro D, Maiolino C, Malarz A, Markert J, Metag V, Mousa J, Münch M, Müntz C, Naumann L, Nekhaev A, Novotny J, Otwinowski J, Pachmayer YC, Pechenov V, Pérez T, Piattelli P, Pietraszko J, Pleskac R, Płoskoń M, Pospísil V, Prokopowicz W, Przygoda W, Ramstein B, Reshetin A, Ritman J, Roy-Stephan M, Rustamov A, Sadovsky A, Sailer B, Salabura P, Sánchez M, Sapienza P, Schmah A, Schön H, Schön W, Schröder C, Schwab E, Simon RS, Smolyankin V, Smykov L, Spataro S, Spruck B, Ströbele H, Stroth J, Sturm C, Sudoł M, Suk M, Taranenko A, Tlusty P, Toia A, Traxler M, Tsertos H, Vassiliev D, Vázquez A, Wagner V, Waluś W, Wiśniowski M, Wójcik T, Wüstenfeld J, Zanevsky Y, Zeitelhack K, Zovinec D, and Zumbruch P

Abstract

The invariant-mass spectrum of e+e- pairs produced in 12C+12C collisions at an incident energy of 2 GeV per nucleon has been measured for the first time. The measured pair production probabilities span over 5 orders of magnitude from the pi(0)-Dalitz to the rho/omega invariant-mass region. Dalitz decays of pi(0) and eta account for all the yield up to 0.15 GeV/c(2), but for only about 50% above this mass. A comparison with model calculations shows that the excess pair yield is likely due to baryon-resonance and vector-meson decays. Transport calculations based on vacuum spectral functions fail, however, to describe the entire mass region.

Published
2007
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23. Quasifree (d

Author

Sams T, Ellegaard C, Gaarde C, Larsen JS, Boyard JL, Hennino T, Jourdain JC, Ramstein B, Roy-Stephan M, Radvanyi P, Brockstedt A, Österlund M, Zupranski P, Goodman CD, Ichimura M, and Dmitriev VF

Published
1995
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24. Reaction (dpol,2He) at intermediate energies.

Author

Ellegaard C, Gaarde C, Jorgensen TS, Larsen JS, Goodman C, Bergqvist I I, Brockstedt A, Ekström P, Bedjidian M, Contardo D, Grossiord JY, Guichard A, Bachelier D, Boyard JL, Hennino T, Jourdain JC, Roy-Stephan M, Radvanyi P, and Tinsley J

Published
1987
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