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

D. Mikowiec; W. Ahner; R. Barth; M. Cielak; M. Dbowski; E. Grosse; W. Henning; P. Koczoń; R. Schicker; E. Schwab; P. Senger; P. Baltes; Ch Müntz; H. Oeschler; S. Sartorius; Ch Sturm; A. Wagner; P. Beckerle; Ch Bormann; D. Brill; Y. Shin; J. Stein; R. Stock; H. Ströbele; B. Kohlmeyer; H. Pöppl; F. Pühlhofer; J. Speer; K. Völkel; W. Walu

doi:10.1103/PhysRevLett.72.3650

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

D. Mikowiec, W. Ahner, R. Barth, M. Cielak, M. Dbowski, E. Grosse, W. Henning, P. Koczoń, R. Schicker, E. Schwab, P. Senger, P. Baltes, Ch Müntz, H. Oeschler, S. Sartorius, Ch Sturm, A. Wagner, P. Beckerle, Ch Bormann, D. BrillY. Shin, J. Stein, R. Stock, H. Ströbele, B. Kohlmeyer, H. Pöppl, F. Pühlhofer, J. Speer, K. Völkel, W. Walu

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Abstract

In the very heavy collision system Au197+197Au the K+ production process was studied as a function of impact parameter at 1 GeV/nucleon, a beam energy well below the free N-N threshold. The K+ multiplicity increases more than linearly with the number of participant nucleons and the K+/π+ ratio rises significantly when going from peripheral to central collisions. The measured K+ double differential cross section is enhanced by a factor of 6 compared to microscopic transport calculations if secondary processes (ΔN→ KΛN and ΔΔ→KΛN) are ignored.

Original language	English
Pages (from-to)	3650-3653
Number of pages	4
Journal	Physical Review Letters
Volume	72
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevLett.72.3650
State	Published - 1994
Externally published	Yes

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Mikowiec, D., Ahner, W., Barth, R., Cielak, M., Dbowski, M., Grosse, E., Henning, W., Koczoń, P., Schicker, R., Schwab, E., Senger, P., Baltes, P., Müntz, C., Oeschler, H., Sartorius, S., Sturm, C., Wagner, A., Beckerle, P., Bormann, C., ... Walu, W. (1994). Observation of enhanced subthreshold K+ production in central collisions between heavy nuclei. Physical Review Letters, 72(23), 3650-3653. https://doi.org/10.1103/PhysRevLett.72.3650

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title = "Observation of enhanced subthreshold K+ production in central collisions between heavy nuclei",

abstract = "In the very heavy collision system Au197+197Au the K+ production process was studied as a function of impact parameter at 1 GeV/nucleon, a beam energy well below the free N-N threshold. The K+ multiplicity increases more than linearly with the number of participant nucleons and the K+/π+ ratio rises significantly when going from peripheral to central collisions. The measured K+ double differential cross section is enhanced by a factor of 6 compared to microscopic transport calculations if secondary processes (ΔN→ KΛN and ΔΔ→KΛN) are ignored.",

author = "D. Mikowiec and W. Ahner and R. Barth and M. Cielak and M. Dbowski and E. Grosse and W. Henning and P. Koczo{\'n} and R. Schicker and E. Schwab and P. Senger and P. Baltes and Ch M{\"u}ntz and H. Oeschler and S. Sartorius and Ch Sturm and A. Wagner and P. Beckerle and Ch Bormann and D. Brill and Y. Shin and J. Stein and R. Stock and H. Str{\"o}bele and B. Kohlmeyer and H. P{\"o}ppl and F. P{\"u}hlhofer and J. Speer and K. V{\"o}lkel and W. Walu",

year = "1994",

doi = "10.1103/PhysRevLett.72.3650",

language = "English",

volume = "72",

pages = "3650--3653",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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Mikowiec, D, Ahner, W, Barth, R, Cielak, M, Dbowski, M, Grosse, E, Henning, W, Koczoń, P, Schicker, R, Schwab, E, Senger, P, Baltes, P, Müntz, C, Oeschler, H, Sartorius, S, Sturm, C, Wagner, A, Beckerle, P, Bormann, C, Brill, D, Shin, Y, Stein, J, Stock, R, Ströbele, H, Kohlmeyer, B, Pöppl, H, Pühlhofer, F, Speer, J, Völkel, K & Walu, W 1994, 'Observation of enhanced subthreshold K+ production in central collisions between heavy nuclei', Physical Review Letters, vol. 72, no. 23, pp. 3650-3653. https://doi.org/10.1103/PhysRevLett.72.3650

TY - JOUR

T1 - Observation of enhanced subthreshold K+ production in central collisions between heavy nuclei

AU - Mikowiec, D.

AU - Ahner, W.

AU - Barth, R.

AU - Cielak, M.

AU - Dbowski, M.

AU - Grosse, E.

AU - Henning, W.

AU - Koczoń, P.

AU - Schicker, R.

AU - Schwab, E.

AU - Senger, P.

AU - Baltes, P.

AU - Müntz, Ch

AU - Oeschler, H.

AU - Sartorius, S.

AU - Sturm, Ch

AU - Wagner, A.

AU - Beckerle, P.

AU - Bormann, Ch

AU - Brill, D.

AU - Shin, Y.

AU - Stein, J.

AU - Stock, R.

AU - Ströbele, H.

AU - Kohlmeyer, B.

AU - Pöppl, H.

AU - Pühlhofer, F.

AU - Speer, J.

AU - Völkel, K.

AU - Walu, W.

PY - 1994

Y1 - 1994

N2 - In the very heavy collision system Au197+197Au the K+ production process was studied as a function of impact parameter at 1 GeV/nucleon, a beam energy well below the free N-N threshold. The K+ multiplicity increases more than linearly with the number of participant nucleons and the K+/π+ ratio rises significantly when going from peripheral to central collisions. The measured K+ double differential cross section is enhanced by a factor of 6 compared to microscopic transport calculations if secondary processes (ΔN→ KΛN and ΔΔ→KΛN) are ignored.

AB - In the very heavy collision system Au197+197Au the K+ production process was studied as a function of impact parameter at 1 GeV/nucleon, a beam energy well below the free N-N threshold. The K+ multiplicity increases more than linearly with the number of participant nucleons and the K+/π+ ratio rises significantly when going from peripheral to central collisions. The measured K+ double differential cross section is enhanced by a factor of 6 compared to microscopic transport calculations if secondary processes (ΔN→ KΛN and ΔΔ→KΛN) are ignored.

UR - http://www.scopus.com/inward/record.url?scp=0042863769&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.72.3650

DO - 10.1103/PhysRevLett.72.3650

M3 - Article

AN - SCOPUS:0042863769

SN - 0031-9007

VL - 72

SP - 3650

EP - 3653

JO - Physical Review Letters

JF - Physical Review Letters

IS - 23

ER -

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

Abstract

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