European Science FoundationExploratory Workshop

How to Constrain the High Density Symmetry Energy

HiDeSymEHiDeSymEnene

European Science FoundationExploratory Workshop

How to Constrain the High Density Symmetry Energy

HiDeSymEHiDeSymEnene

Zoran Basrak

September 1, 2010, Egelsbach, Germany

Z. Basrak, convenor

Strategic WorkshopStrategic Workshop European Science Foundation Standing Committee for Physical and Engineering Sciences

Laboratory for Nuclear PhysicsLaboratory for Nuclear Physics Division of Experimental Physics Division of Experimental Physics

RRuđeruđer Bošković Bošković Institute, Zagreb, CroatiaInstitute, Zagreb, Croatia

1950 – 2010

ESF EW HiDeSymEne

https://www.irb.hr/users/mkis/

Participants by country

Poland15%

Romania4%

Sweden4%

UK4%

Italy23%

Germany15%

France12%

Croatia15%

USA8%

0 1 2 3 4

Number of participants

21-2526-3031-3536-4041-4546-5051-5556-6061-6566-70

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Participants by age

Nucleosynthesis

Nuclear Equation of state (EoS)

p

V

T

pV = nRT

SOFT

HARD

E (,I) = E (,0) + Esym()I2 + o (I4) + ...

I = (n − p) /

Esym() ≈ E()neutr. matter - E()sym. nucl. matter

Symmetry energy

• The density dependence of symmetry energy is largely unconstrainedlargely unconstrained.

• What is “stiff” or “soft”“stiff” or “soft” (curvature) is density dependent

The asymmetry term contributes a greater uncertainty than does the

symmetric matter EOS.(Bao-An Li)

Z. Xiao et al., PRL 102 (2009) 062502

Neutron star

p / n ≤ 0.1 – 0.2

c ≤ (2-15)0

J. M

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1. n-p squeeze-out data from Au+Au collisions at E = 400A MeV [Y. Leifels et al., PRL 71 (1993) 963] → the UrQMD code predicts a steady rise of Esteady rise of Esym sym

→ γ=0.60.3 [W. Trautmann et al., ProgPartNuPh (2009)].

1. n-p squeeze-out data from Au+Au collisions at E = 400A MeV [Y. Leifels et al., PRL 71 (1993) 963] → the UrQMD code predicts a steady rise of Esteady rise of Esym sym

→ γ=0.60.3 [W. Trautmann et al., ProgPartNuPh (2009)].

2. π-/π+ yield ratio data for Au+Au collisions in a broad energy range [Reisdorf et al., NP A781 (2007) 459] → the IBUU04 code predicts a vanishing Evanishing Esymsym → γ=0.960.21, super soft asyEOSsuper soft asyEOS [Z. Xiao et al., PRL 102 (2009) 062502].

Supra-saturation densitiesThe only available data (FOPI and FOPI–LAND collaborations @ GSI) result in a contradictory predictions for Esym:

(Courtesy of M.B. Tsang) Z.Q. Feng, G.M. Jin, PL B683 (2010) 140

HiDeSymEneHiDeSymEne

Follow-up activitiesFollow-up activities

HiDeSymEneHiDeSymEne

Follow-up activitiesFollow-up activities

European Science FoundationResearch Networking Programmes

Constraining the Symmetry Energy

CoSymECoSymE

European Science FoundationResearch Networking Programmes

Constraining the Symmetry Energy

CoSymECoSymE Z. Basrak, M. Colonna and W. Trautmann

How ?

GDR & PYGNY RESONANCE

Creation of discussion fora:

What for ?

- new intensive RIB facilities - train up a new generation of scientists to take over leadership

Open character

Exchange of students & experts Facilitate a global dimension (complementarities) Timely initiative Prepare future

- theoreticians – experimentalists - nuclear physics – astrophysics

Who ?

1 Croatia

2 France

3 Germany

4 Italy

5 Poland

6 Romania

7 Spain

8 Sweden

9 United Kingdom

European Science Foundation 30 member states

Who ? 1 Croatia

Department of Physics, University of Split, Split

Department of Physics, University of Zagreb, Zagreb

Ruđer Bošković Institute, Division of eperimental physics, Zagreb

2 France

GANIL, CEA/DSM-CNRS/IN2P3, Caen

LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, Caen

Subatech, EMN-IN2P3/CNRS-Université de Nantes, Nantes

Institut de Physique Nucléaire, IN2P3-CNRS, Orsay

3 Germany

GSI Helmholtzzentrum fur Schwerionenforschung GmbH, Darmstadt

FIAS, Universitat Frankfurt, Frankfurt am Main

Institute for Theoretical Physics, University of Giessen, Giessen

Institute for Theoretical Physics/Astrophysics, University of Heidelberg, Heidelberg

4 Italy

Dipartimento di Fisica, University of Catania, Catania

CSFNSM, Catania

INFN – Sezione di Catania, Catania

INFN-LNS, Catania

Kore University, Enna

INFN – Sezione di Milano and Dipartimento di Fisica, Milano

INFN – Sezione Napoli and Dipartimento di Fisica, Napoli

5 Poland

Institute of Physics, University of Silesia, Katowice

Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Krakow

IFJ-PAN, Krakow

A. Soltan Institute for Nuclear Studies, Swierk/Warsaw

Institute of Experimental Physics, Warsaw University, Warsaw

Institute for Theoretical Physics, University of Wroclaw, Wroclaw

6 RomaniaNIPNE, Bucharest

University of Bucharest and IFIN-HH, Bucharest

7 Spain University of Santiago de Compostela, Santiago de Compostela

8 Sweden

Department of Fundamental Physics, Chalmers University, Göteborg

Faculty of Science, Lund University, Lund

School of Technology, Malmo University, Malmo

9United Kingdom

STFC Daresbury Laboratory, Warrington, Cheshire

University of Liverpool, Liverpool

CoSymE proposal assessment

Presentations at meetings

Lobbying for CoSymE

SIS18 ASY-EOS experiment S394Experiment approved by GSI-PAC

ASY-EOS CollaborationZagreb, CroatiaCaen, Orsay, FranceDarmstadt, Frankfurt, GermanyIoannina, GreeceCatania, Milano, Napoli, ItalyKatowice, Krakow, Warsaw, PolandBucharest, RomaniaSantiago de Compostela, SpainLund, Malmo, SwedenDaresbury, Liverpool, United Kingdom

Kolkata, IndiaNSCL-MSU, Rochester, USA

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European Science FoundationExploratory Workshop

How to Constrain the High Density Symmetry Energy

HiDeSymEHiDeSymEnene

European Science FoundationExploratory Workshop

How to Constrain the High Density Symmetry Energy

HiDeSymEHiDeSymEnene

Zoran Basrak

September 1, 2010, Egelsbach, Germany

Z. Basrak, convenor

Strategic WorkshopStrategic Workshop European Science Foundation Standing Committee for Physical and Engineering Sciences

Laboratory for Nuclear PhysicsLaboratory for Nuclear Physics Division of Experimental Physics Division of Experimental Physics

RRuđeruđer Bošković Bošković Institute, Zagreb, CroatiaInstitute, Zagreb, Croatia

1950 – 2010

Thank you Thank you for your for your attentionattention

Thank you Thank you for your for your attentionattention