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Nucleus-Nucleus Collisions in NA49-future. An introduction for everybody. The main goal of studying nucleus-nucleus collisions in NA49-future is the investigation of the transition between two phases of strongly interacting matter:. gas of hadrons. and. quark-gluon plasma.

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Nucleus-Nucleus Collisions in NA49-future


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slide1

Nucleus-Nucleus Collisions

in NA49-future

An introduction for everybody

The main goal of studying nucleus-nucleus collisions

in NA49-future is the investigation of the transition

between two phases of strongly interacting matter:

gas of hadrons

and

quark-gluon

plasma

NA49-future

slide2

Models of strong interactions predict a sharp phase

boundary (1st order phase transition) between hadron gas

and quark-gluon plasma ending in a critical point

NA49-future aims to discover thecritical

point of strongly interacting matter

NA49 at the CERN SPS

studying collisions of

two lead nuclei (Pb+Pb)

found evidence for

the transition between

hadron gas and

quark-gluon plasma

Temperature

NA49-future will study

properties of this transition

in order to establish

fundamental features of

strongly interacting matter

Baryochemical potential

NA49-future

slide3

The main ideas behind the NA49-future nucleus-nucleus

program can be related to the well known properties of water

(water properties are determined by electro-magnetic interactions)

Phases of strongly

interacting matter

Phases of water

NA49-future

slide4

Heating curves of strongly interacting matter measured

by NA49 at the CERN SPS serve as evidence for a transition

between hadron gas and

quark-gluon plasma,

similarly the heating curve of water

shows the transitions between

the phases of water

Heating of

water vapor

Heat used to vaporize

water to water vapor

temperature (oC)

100

Properties of produced hadrons

Heating

of water

0

Ice

Q (heat added)

NA49-future

Collision energy

slide5

the properties of the

transition between hadron

gas and quark-gluon plasma

still have to be uncovered

The phase

diagram of water

is well established

but

Temperature (MeV)

?

?

NA49-future

Baryochemical potential (MeV)

critical point

1st order phase transition

NA49-future

slide6

In our daily life ...

droplets of water

10-12

droplets of strongly

interacting matter

the properties of strongly

interacting matter can be

studied only in collisions

of heavy nuclei

NA49-future

slide7

COLLISIONS OF TWO NUCLEI

-the only tool to study properties of

strongly interacting matter in the laboratory

UrQMD

snapshot of the produced

matter after the collision

(scale 10-14 m)

produced particles measured

in the NA49 apparatus

(scale 10 m)

NA49-future

slide8

NA49-future at the CERN SPS

LHC

NA49-future

SPS

NA49-future

slide9

-future

NA49-future

slide10

NA49-future plans to perform a comprehensive scan in energy

and size of colliding nuclei to study the properties of the

transition between hadron gas and quark gluon plasma

NA49

NA49-future

Pb+Pb

In+In

Si+Si

C+C

p+p

10 20 30 40 80 158

10 20 30 40 80 158

energy (A GeV)

energy (A GeV)

= 2∙106 registered collisions

NA49-future

slide11

New data registered

by NA49-future

may lead to a discovery of the critical

point of strongly interacting matter

by an observation of

a hill of fluctuations

In+In

Si+Si

C+C

p+p

158

In+In

10 20 30 40 80 158

80

Si+Si

40

energy (A GeV)

energy (A GeV)

C+C

30

p+p

20

= 2∙106 registered collisions

NA49-future

slide12

New data registered

by NA49-future

will uncover properties of the transition

between hadron gas and quark-gluon

observed by NA49 in Pb+Pb collisions

In+In

Si+Si

C+C

p+p

10 20 30 40 80 158

energy (A GeV)

10 20 30 40 80 158

energy (A GeV)

= 2∙106 registered collisions

NA49-future

slide13

The NA49-future Collaboration:

101 physicists from 24 institutes and 15 countries:

University of Athens, Athens, Greece

University of Bari and INFN, Bari, Italy

University of Bergen, Bergen, Norway

University of Bern, Bern, Switzerland

KFKI IPNP, Budapest, Hungary

Cape Town University, Cape Town, South Africa

Jagellionian University, Cracow, Poland

Joint Institute for Nuclear Research, Dubna, Russia

Fachhochschule Frankfurt, Frankfurt, Germany

University of Frankfurt, Frankfurt, Germany

University of Geneva, Geneva, Switzerland

Forschungszentrum Karlsruhe, Karlsruhe, Germany

Swietokrzyska Academy, Kielce, Poland

Institute for Nuclear Research, Moscow, Russia

LPNHE, Universites de Paris VI et VII, Paris, France

Pusan National University, Pusan, Republic of Korea

Faculty of Physics, University of Sofia, Sofia, Bulgaria

St. Petersburg State University, St. Petersburg, Russia

State University of New York, Stony Brook, USA

KEK, Tsukuba, Japan

Warsaw University of Technology, Warsaw, Poland

University of Warsaw, Warsaw, Poland

Rudjer Boskovic Institute, Zagreb, Croatia

ETH, Zurich, Switzerland

NA49-future