Anisotropy of subthreshold K+ emission in heavy ion reactions

Wang, Z.S.; Faessler, A.; Fuchs, C.; Uma Maheswari, V.S.; Kosov, D.

doi:10.1103/PhysRevLett.79.4096

Anisotropy of subthreshold K+ emission in heavy ion reactions

1997

4 pages

Published in:

Phys.Rev.Lett. 79 (1997) 4096-4099

DOI:

10.1103/PhysRevLett.79.4096

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Abstract: (APS)

The origin of the forward-backward enhancement of K+ emission observed in symmetric nucleus-nucleus collisions at 1 GeV/nucleon has been explored. The nonisotropic pion-baryon reaction leading to K+ production has been found to play a substantial role in creating the forward-backward peak of the kaon angular distribution. By an analysis including also the effects from relevant final-state interactions on kaons, we can reproduce the experimental kaon angular distribution. We argue that the observed nonisotropic kaon emission may provide a support to the pion-induced channel for subthreshold kaon production in heavy ion reactions.

scattering: heavy ion
gold
K+: emission
threshold
angular distribution: asymmetry
final-state interaction
pi baryon: interaction
differential cross section: angular dependence
differential cross section: momentum dependence
numerical calculations: interpretation of experiments

References(24)

Figures(0)

Subthreshold Kaon Production as a Probe of the Nuclear Equation of State

J. Aichelin
(
- Oak Ridge
)
,
C.M. Ko
(
- Oak Ridge
)

- Phys.Rev.Lett. 55 (1985) 2661-2663,
- Phys. Rev. Lett. 55 ( 1985) 2661-2663
•
DOI:
- 10.1103/PhysRevLett.55.2661

ROLE OF MEAN FREE PATHS OF PRODUCT PARTICLES IN HIGH-ENERGY NUCLEUS NUCLEUS COLLISIONS

S. Nagamiya
(
- INS, Tokyo and
- LBL, Berkeley
)

- Phys.Rev.Lett. 49 (1982) 1383-1386
•
DOI:
- 10.1103/PhysRevLett.49.1383

Kaon flow as a probe of the kaon potential in nuclear medium

- Phys.Rev.Lett. 74 (1995) 235-238
•
e-Print:
- nucl-th/9410017
•
DOI:
- 10.1103/PhysRevLett.74.235

Medium effects in high-energy heavy ion collisions

C.M. Ko
(
- Texas A-M
)
,
Guo-Qiang Li
(
- Texas A-M
)

- J.Phys.G 22 (1996) 1673-1725,
- J.Phys.G 22 (1996) 1673-1726
•
e-Print:
- nucl-th/9611027
•
DOI:
- 10.1088/0954-3899/22/12/002

Subthreshold production of kaons and anti-kaons in nucleus-nucleus collisions at equivalent beam energies

KaoS

Collaboration

•

R. Barth
(
- Darmstadt, GSI
)

et al.

- Phys.Rev.Lett. 78 (1997) 4007-4010
•
DOI:
- 10.1103/PhysRevLett.78.4007

Observation of enhanced subthreshold K+ production in central collisions between heavy nuclei

et al.

- Phys.Rev.Lett. 72 (1994) 3650-3653
•
DOI:
- 10.1103/PhysRevLett.72.3650

Kaon production at subthreshold energies

C. Hartnack
(
- Nantes U. and
- Darmstadt, GSI
)
,
L. Sehn
(
- Nantes U. and
- Darmstadt, GSI
)
,
J. Jaenicke
(
- Heidelberg U.
)
,
Horst Stoecker
(
- Frankfurt U.
)
,
J. Aichelin
(
- Nantes U.
)

- Nucl.Phys.A 580 (1994) 643-678
•
DOI:
- 10.1016/0375-9474(94)90786-2

K+ emission in symmetric heavy ion reactions at subthreshold energies

et al.

- Phys.Rev.Lett. 77 (1996) 4884-4886,
- Phys.Rev.Lett. 78 (1997) 1396 (erratum)
•
DOI:
- 10.1103/PhysRevLett.77.4884

Origin of subthreshold K+ production in heavy ion collisions

et al.

- Phys.Rev.C 56 (1997) R606-R609
•
e-Print:
- nucl-th/9701065
•
DOI:
- 10.1103/PhysRevC.56.R606

- NOONE 62 606

Strange-particle production in pi- p interactions from 1.5 to 4.2-BeV/c. II: Two-body final states. (erratum)

et al.

- Phys.Rev. 163 (1967) 1430-1440,
- Phys.Rev. 183 (1969) 1520 (erratum)
•
DOI:
- 10.1103/PhysRev.163.1430

Study of the reaction pi+ p ---> sigma+ k+ between 1850- and 2090-mev center-of-mass energy

- Phys.Rev.D 2 (1970) 1824-1837
•
DOI:
- 10.1103/PhysRevD.2.1824

Experimental study of the reaction $\pi^- p \to \Lambda K^0$ at beam momenta between 930 and 1130 MeV/c

T.M. Knasel
(
- Chicago U., EFI and
- Chicago U.
)
,
J. Lindquist
(
- Chicago U., EFI
)
,
B. Nelson
(
- Chicago U., EFI
)
,
R.L. Sumner
(
- Chicago U., EFI
)
,
E.C. Swallow
(
- Chicago U., EFI
)

et al.

- Phys.Rev.D 11 (1975) 1-13
•
DOI:
- 10.1103/PhysRevD.11.1

Rescattering effects on kaon energy spectra in heavy ion collisions

- Nucl.Phys.A 556 (1993) 499-508
•
DOI:
- 10.1016/0375-9474(93)90374-7

Internal nuclear momentum and subthreshold kaon production

A. Sibirtsev
(
- Dubna, JINR
)

- Phys.Lett.B 359 (1995) 29-32
•
DOI:
- 10.1016/0370-2693(95)01050-Z

- Phys.Lett.B 381 859

KAON PRODUCTION IN RELATIVISTIC NUCLEAR COLLISIONS

J. Randrup
(
- LBL, Berkeley
)
,
C.M. Ko
(
- LBL, Berkeley
)

- Nucl.Phys.A 343 (1980) 519-544,
- Nucl.Phys.A 411 (1983) 537-540 (addendum),
- In *Berkeley 1980, Proceedings, Nuclear Physics, Vol. 1*, 469
•
DOI:
- 10.1016/0375-9474(83)90544-4

The Role of the Delta (1920) resonance for kaon production in heavy ion collisions

- Phys.Lett.B 337 (1994) 245-253
•
e-Print:
- nucl-th/9407021
•
DOI:
- 10.1016/0370-2693(94)90971-7

Resonance model of pi Delta ---> Y K for kaon production in heavy ion collisions

- J.Phys.G 21 (1995) 33-42
•
e-Print:
- nucl-th/9407020
•
DOI:
- 10.1088/0954-3899/21/1/005

K+ PRODUCTION IN A CASCADE MODEL FOR HIGH-ENERGY NUCLEUS NUCLEUS COLLISIONS

J. Cugnon
(
- Liege U.
)
,
R.M. Lombard
(
- Saclay and
- SLAC
)

- Nucl.Phys.A 422 (1984) 635-653,
- Nucl. Phys. A422 ( 1984) 635-653
•
DOI:
- 10.1016/0375-9474(84)90369-5

Chiral restoration in hot and/or dense matter

G.E. Brown
(
- SUNY, Stony Brook
)
,
Mannque Rho
(
- Saclay and
- Washington U., Seattle
)

- Phys.Rept. 269 (1996) 333-380
•
e-Print:
- hep-ph/9504250
•
DOI:
- 10.1016/0370-1573(95)00067-4

COULOMB DISTORTION OF PION SPECTRA FROM HEAVY ION COLLISIONS

K.G. Libbrecht
(
- Caltech
)
,
S.E. Koonin
(
- Caltech
)

- Phys.Rev.Lett. 43 (1979) 1581-1584
•
DOI:
- 10.1103/PhysRevLett.43.1581

Formation of superdense hadronic matter in high-energy heavy ion collisions

Bao-An Li
(
- Texas A-M
)
,
Che Ming Ko
(
- Texas A-M
)

- Phys.Rev.C 52 (1995) 2037-2063
•
e-Print:
- nucl-th/9505016
•
DOI:
- 10.1103/PhysRevC.52.2037

PRODUCTION OF K+ MESONS IN 2.1-GEV/NUCLEON NUCLEAR COLLISIONS

et al.

- Phys.Rev.Lett. 49 (1982) 989-992,
- Lawrence Berkeley Lab. - LBL-14523 (82,REC.SEP.) 10p
•
DOI:
- 10.1103/PhysRevLett.49.989