Dilepton analysis in the HADES spectrometer for C + C at 2-A-GeV - INSPIRE

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Dilepton analysis in the HADES spectrometer for C + C at 2-A-GeV

2005

Part of Proceedings, Workshop for Young Scientists on the Physics of Ultrarelativistic Nucleus Nucleus Collisions (Hot Quarks 2004) : Snakedance, Taos Valley, USA, July 18-24, 2004

Published in:

J.Phys.G 31 (2005) S231-S237

Contribution to:

Hot Quarks 2004

DOI:

10.1088/0954-3899/31/4/028

Experiments:

GSI-HADES

View in:

Nuclear Science References

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Abstract: (IOP)

The high-acceptance dielectron spectrometer (HADES) has become operational at GSI Darmstadt. The primary physics programme is to study in-medium changes of light vector mesons via their e+e−decays. The methods of dilepton signal reconstruction in the HADES spectrometer and preliminary dilepton spectra for C+C reactions at 2AGeV are presented. In the signal reconstruction, particularly important is the reduction of the huge combinatorial background arising from e+e−combinations of leptons from gamma conversion in materials with other leptons in the collision. The purity of the dilepton signal is determined by using GEANT simulations with the full HADES geometry and a realistic detector response.

References(21)

Figures(0)

[1]

Studying in-medium hadron properties with HADES

HADES

Collaboration

•

J. Friese
(
- Munich, Tech. U.
)

for the collaboration.

- Prog.Part.Nucl.Phys. 42 (1999) 235-245,
•
DOI:
- 10.1016/S0146-6410(99)00079-4

[2]

(HADES Collaboration) 1996

Salabura P

- Acta Phys.Polon. 27 (1996) 3095

[3]

High acceptance di-electron spectrometer: Tool for study of hadron properties in the nuclear medium

HADES

Collaboration

•

A. Kugler
(
- Prague, Inst. Phys.
)

for the collaboration.

- Czech.J.Phys. 50S2 (2000) 72-85
•
DOI:
- 10.1007/s10582-000-0032-y

[4]

Chiral symmetry restoration and dileptons in relativistic heavy ion collisions

R. Rapp
(
- SUNY, Stony Brook
)
,
J. Wambach
(
- Darmstadt, Tech. Hochsch.
)

- Adv.Nucl.Phys. 25 (2000) 1
•
e-Print:
- hep-ph/9909229
•
DOI:
- 10.1007/0-306-47101-9_1

[5]

Dielectron cross-section measurements in nucleus-nucleus reactions at 1-A/GeV

DLS

Collaboration

•

R.J. Porter

et al.

- Phys.Rev.Lett. 79 (1997) 1229-1232
•
e-Print:
- nucl-ex/9703001
•
DOI:
- 10.1103/PhysRevLett.79.1229

[6]

First results from CERES/NA45 on low mass electron pair production in Pb Au collisions

CERES

Collaboration

•

Th. Ullrich
(
- Dubna, JINR and
- Heidelberg U. and
- Darmstadt, GSI and
- Heidelberg, Max Planck Inst. and
- Weizmann Inst. and
- Milan Polytechnic and
- Brookhaven Natl. Lab. and
- CERN
)

et al.

- Nucl.Phys.A 610 (1996) 317C-330C,
- Nucl. Phys. A610 (1996) 317c-330c
•
DOI:
- 10.1016/S0375-9474(96)00366-1

[6]

Low mass dilepton and photon production

A. Drees
(
- Heidelberg U.
)

- Nucl.Phys.A 610 (1996) 536C-551C,
- Nucl. Phys. A610 (1996) 536c-551c
•
DOI:
- 10.1016/S0375-9474(96)00386-7

[7]

2000

Abreu M. C

- Eur.Phys.J.C 13 (2000) 67

[8]

Hadronic and electromagnetic probes of hot and dense nuclear matter

W. Cassing
(
- Giessen U.
)
,
E.L. Bratkovskaya
(
- Giessen U.
)

- Phys.Rept. 308 (1999) 65-233
•
DOI:
- 10.1016/S0370-1573(98)00028-3

[9]

Scaling effective Lagrangians in a dense medium

G.E. Brown
(
- SUNY, Stony Brook
)
,
Mannque Rho
(
- Saclay
)

- Phys.Rev.Lett. 66 (1991) 2720-2723
•
DOI:
- 10.1103/PhysRevLett.66.2720

[10]

P wave polarization of the rho meson and the dilepton spectrum in dense matter

B. Friman
(
- Darmstadt, GSI and
- Darmstadt, Tech. Hochsch.
)
,
H.J. Pirner
(
- Heidelberg U.
)

- Nucl.Phys.A 617 (1997) 496-509
•
e-Print:
- nucl-th/9701016
•
DOI:
- 10.1016/S0375-9474(97)00050-X

[11]

B&#246

[11]

Lepton identification with the CsI based RICH of HADES

HADES

Collaboration

•

M. Bohmer
(
- Munich, Tech. U.
)

et al.

- Nucl.Instrum.Meth.A 471 (2000) 25-29
•
DOI:
- 10.1016/S0168-9002(01)00911-1

[12]

Development of low-mass drift chambers for the HADES spectrometer

et al.

- Nucl.Instrum.Meth.A 477 (2002) 397-400
•
DOI:
- 10.1016/S0168-9002(01)01842-3

[13]

2005 Nucl. Instrum. Meth at press

Balanda A

[14]

The HADES time-of-flight wall

C. Agodi
(
- INFN, LNS
)
,
A. Bassi
(
- Milan U. and
- INFN, Milan
)
,
R. Bassini
(
- Milan U.
)
,
G. Bellia
(
- INFN, LNS and
- Catania U.
)
,
M. Benovic
(
- Bratislava, Inst. Phys.
)

et al.

- Nucl.Instrum.Meth.A 492 (2002) 14-25
•
DOI:
- 10.1016/S0168-9002(02)01004-5

[15]

Performance of the HADES ring recognition hardware

HADES

Collaboration

•

J. Lehnert
(
- Giessen U.
)

et al.

- Nucl.Instrum.Meth.A 502 (2003) 261-265
•
DOI:
- 10.1016/S0168-9002(03)00285-7

[15]

A highly selective dilepton trigger based on ring recognition

HADES

Collaboration

•

A. Toia
(
- Giessen U.
)

et al.

- Nucl.Instrum.Meth.A 502 (2003) 270-274
•
DOI:
- 10.1016/S0168-9002(03)00287-0

[16]

Microscopic models for ultrarelativistic heavy ion collisions

et al.

- Prog.Part.Nucl.Phys. 41 (1998) 255-369
•
e-Print:
- nucl-th/9803035
•
DOI:
- 10.1016/S0146-6410(98)00058-1

[17]

2004 PhD Thesis Technical University, Darmstadt

Bielcik J

[18]

(HADES Collaboration) 2004 Proc. Meson 2004 Conference

Otwinowski J