Characterizing New Physics with Polarized Beams in Hadron Collisions
Formation of hypernuclei in reactions induced by heavy-ion and hadron beams
description
Transcript of Formation of hypernuclei in reactions induced by heavy-ion and hadron beams
Bochum, 18.03.09
Formation of hypernuclei in reactions induced Formation of hypernuclei in reactions induced
by heavy-ion and hadron beams by heavy-ion and hadron beams
T. Gaitanos, H. Lenske, U. MoselT. Gaitanos, H. Lenske, U. Mosel
IntroductionIntroduction
Theoretical aspectsTheoretical aspectsGiessen-BUU (GiBUU) +SMM approach
Applications-I: (X+X, p+X)@SISApplications-I: (X+X, p+X)@SISBenchmark tests (fragmentation)Applications-II: X+X@2AGeV (HypHI), p+X@50GeV (PANDA, J-PARC)Predictions on hypernuclear production cross sections
Final remarksFinal remarks
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Introduction…Introduction…Introduction…Introduction…
NuSTAR: NuSTAR: NuNuclear clear StStructure, ructure, AAstrophysics, strophysics, RReactionseactions
N
Z
Nuclear structure at the limitsNuclear structure at the limits
HypHI: HypHI: HypHyperon eron HHeavy-eavy-IIonon
AntiAntipproton-proton roton-proton AnAnnihilation in nihilation in DaDarmstadtrmstadt
* Explore YB- & YY-* Explore YB- & YY-interactioninteraction
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Relativistic hypernuclei…Relativistic hypernuclei…
Production of hypernuclei in relativistic HICProduction of hypernuclei in relativistic HICProduction of many hyperons from BB->BYK (3-body PS)
Secondary rescattering (NYK)Multiple coalescence of hyperons with fragments
Theoretical frameworkTheoretical framework
Phase-Space evolution Phase-Space evolution Transport approaches (INC,BUU,RBUU,CBUU,(Ur)QMD,HSD,…)
Description of fragment formation Description of fragment formation Statistical picture (SMM, Botvina & Mishustin)
Description of hypernuclei formation?Description of hypernuclei formation?Phase-Space coalescence in coordinate and in momentum space
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Theoretical aspects…Theoretical aspects…Theoretical aspects…Theoretical aspects…
Initial non-equilibrium stageInitial non-equilibrium stageInitial non-equilibrium stageInitial non-equilibrium stage
Asymptotic equilibrated stageAsymptotic equilibrated stage
Statistical Multifragmentation Model (SMM)
Fission/spallation, evaporation, multifragmentation… (with increasing excitation)
Statistical determination of partial decay widths Monte-Carlo method
Asymptotic equilibrated stageAsymptotic equilibrated stage
Statistical Multifragmentation Model (SMM)
Fission/spallation, evaporation, multifragmentation… (with increasing excitation)
Statistical determination of partial decay widths Monte-Carlo method
E*
Ai,Zi
E*
Ai,Zi
E*-
Ad,Zd
E*-
Ad,Zd
j,j,
AiAi Ad+nAd+n
(http://gibuu.physik.uni-giessen.de/GiBUU)(http://gibuu.physik.uni-giessen.de/GiBUU)(http://gibuu.physik.uni-giessen.de/GiBUU)(http://gibuu.physik.uni-giessen.de/GiBUU)
SMM code: Botvina & Mishustin, PR257(´95) 133SMM code: Botvina & Mishustin, PR257(´95) 133SMM code: Botvina & Mishustin, PR257(´95) 133SMM code: Botvina & Mishustin, PR257(´95) 133
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Application-I: Fragmentation in [email protected] GeV Application-I: Fragmentation in [email protected] GeV (global (global aspects…)aspects…)Application-I: Fragmentation in [email protected] GeV Application-I: Fragmentation in [email protected] GeV (global (global aspects…)aspects…)
Charge distribution…Charge distribution…
Mass distribution…
Mass distribution…
Phys. Lett. B Phys. Lett. B 663663, 197 , 197 (2008)(2008)
Exp. data:Exp. data:Benlliure et al., Nucl. Phys. A683 (2001) 513.Rejmund et al., Nucl. Phys. A683 (2001) 540
Exp. data:Exp. data:Benlliure et al., Nucl. Phys. A683 (2001) 513.Rejmund et al., Nucl. Phys. A683 (2001) 540
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Pre-Equilibrium (GiBUU): high-energy n-emission, QE-peakPre-Equilibrium (GiBUU): high-energy n-emission, QE-peak
Asymptotic final state (SMM): Statistical decay of excited sourceAsymptotic final state (SMM): Statistical decay of excited source
Final Result: Hybrid GiBUU+SMMFinal Result: Hybrid GiBUU+SMMFinal Result: Hybrid GiBUU+SMMFinal Result: Hybrid GiBUU+SMM
data: S. Leray et al., PRC65,044621 data: S. Leray et al., PRC65,044621
neutronsneutrons
Application-I: Fragmentation in [email protected] GeV Application-I: Fragmentation in [email protected] GeV (energy (energy spectra…)spectra…)Application-I: Fragmentation in [email protected] GeV Application-I: Fragmentation in [email protected] GeV (energy (energy spectra…)spectra…)
Prog. Part. Nucl. Phys. (2009), in pressProg. Part. Nucl. Phys. (2009), in press (arXiv:0811.3506)(arXiv:0811.3506)
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Applications-II: Fragmentation in X+X reactionsApplications-II: Fragmentation in X+X reactionsApplications-II: Fragmentation in X+X reactionsApplications-II: Fragmentation in X+X reactions
absolute yieldsabsolute yields from spectator fragmentation
(ALADIN-data)
absolute yieldsabsolute yields from spectator fragmentation
(ALADIN-data)
fragment velocity spectrafragment velocity spectra
data:
Henzlova, PRC78, 044616
fragment velocity spectrafragment velocity spectra
data:
Henzlova, PRC78, 044616
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Applications-II: Hypernuclei in spectator fragmentation…Applications-II: Hypernuclei in spectator fragmentation…(HypHI, (HypHI, 1212C+C+1212C@2AGeV)C@2AGeV)
Applications-II: Hypernuclei in spectator fragmentation…Applications-II: Hypernuclei in spectator fragmentation…(HypHI, (HypHI, 1212C+C+1212C@2AGeV)C@2AGeV)
First transport theoretical predictions: total yields ~b
Consistent with previous studies: M.Wakai, NPA547(92)89cM.Wakai, NPA547(92)89c
First transport theoretical predictions: total yields ~b
Consistent with previous studies: M.Wakai, NPA547(92)89cM.Wakai, NPA547(92)89c
Prog. Part. Nucl. Phys. (2009), in press Prog. Part. Nucl. Phys. (2009), in press (arXiv:0811.3506)(arXiv:0811.3506)
Phys. Lett. B (2008), submittedPhys. Lett. B (2008), submitted
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Applications-II: Hypernuclei from high energy proton-induced Applications-II: Hypernuclei from high energy proton-induced reactions…reactions…
(PANDA/J-PARC, p+(PANDA/J-PARC, p+1212C@50GeV)C@50GeV)
Applications-II: Hypernuclei from high energy proton-induced Applications-II: Hypernuclei from high energy proton-induced reactions…reactions…
(PANDA/J-PARC, p+(PANDA/J-PARC, p+1212C@50GeV)C@50GeV)
Two sources (residual target+moving source)
Most of hyperons created & rescatter inside moving source
Two sources (residual target+moving source)
Most of hyperons created & rescatter inside moving source
Prog. Part. Nucl. Phys. (2009), in press (arXiv:0811.3506), Phys. Lett. B (2008), Prog. Part. Nucl. Phys. (2009), in press (arXiv:0811.3506), Phys. Lett. B (2008), submittedsubmitted
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Conclusions…Conclusions…
Theoretical activities: “FAIR” @ GiessenTheoretical activities: “FAIR” @ Giessen GiBUU+SMM: NE-dynamics + statistical process of fragmentationGiBUU+SMM: NE-dynamics + statistical process of fragmentation
GiBUU+SMM+GiBUU+SMM+: model extension to hypernuclei (coalescence): model extension to hypernuclei (coalescence)
Theoretical predictions (low energy)Theoretical predictions (low energy) proper description of fragmentation process in spallation reactions proper description of fragmentation process in spallation reactions
and in heavy-ion collisions and in heavy-ion collisions
First theoretical predictions on hypernuclei (high First theoretical predictions on hypernuclei (high energy)energy) ~ ~ b for b for H & H & HeHe in spectator fragmentation in heavy-ion collisions in spectator fragmentation in heavy-ion collisions
high energy high energy H & H & HeHe in proton-induced reactions in proton-induced reactions
Important for future experiments: FAIR @ GSIImportant for future experiments: FAIR @ GSI HypHI (T. Saito) HypHI (T. Saito) Li (C) +C@2AGeV starts soon… Li (C) +C@2AGeV starts soon…
PANDA PANDA exp. predictions on double strange hypernuclei exp. predictions on double strange hypernuclei
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Backup slides
Backup slides
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Prog. Part. Nucl. Phys. (2009), in Prog. Part. Nucl. Phys. (2009), in presspress
Phys. Lett. B (2008), submittedPhys. Lett. B (2008), submitted
Getting started: Spectator fragmentation at [email protected] GeVGetting started: Spectator fragmentation at [email protected] GeVGetting started: Spectator fragmentation at [email protected] GeVGetting started: Spectator fragmentation at [email protected] GeV
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New initialization: Binding energy & rms-radius in BUU…New initialization: Binding energy & rms-radius in BUU…New initialization: Binding energy & rms-radius in BUU…New initialization: Binding energy & rms-radius in BUU…
Old initialization
Old initialization
new initialization
new initialization
RTF-binding energy
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Mean-field vs cascade – the role of the mean-field…Mean-field vs cascade – the role of the mean-field…
(PANDA/J-PARC, p+(PANDA/J-PARC, p+1212C@50GeV)C@50GeV)
Mean-field vs cascade – the role of the mean-field…Mean-field vs cascade – the role of the mean-field…
(PANDA/J-PARC, p+(PANDA/J-PARC, p+1212C@50GeV)C@50GeV)
centralcentral
peripheralperipheral
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Ground state in BUU-II: Ground state in BUU-II: Results (application to proton-induced reactions)Results (application to proton-induced reactions)Ground state in BUU-II: Ground state in BUU-II: Results (application to proton-induced reactions)Results (application to proton-induced reactions)