Kaon and pion production in central Au + Au collisions at sqrt(sNN) = 62.4 GeV

I. C. Arsene; I. G. Bearden; D. Beavis; S. Bekele; C. Besliu; B. Budick; H. Bøggild; C. Chasman; C. H. Christensen; P. Christiansen; H. H. Dalsgaard; R. Debbe; J. J. Gaardhøje; K. Hagel; H. Ito; A. Jipa; E. B. Johnson; C. E. Jørgensen; R. Karabowicz; N. Katrynska; E. J. Kim; T. M. Larsen; J. H. Lee; G. Løvhøiden; Z. Majka; M. J. Murray; J. Natowitz; B. S. Nielsen; C. Nygaard; D. Pal; A. Qviller; F. Rami; C. Ristea; O. Ristea; D. Röhrich; S. J. Sanders; P. Staszel; T. S. Tveter; F. Videbæk; R. Wada; H. Yang; Z. Yin; I. S. Zgura

doi:10.1016/j.physletb.2010.02.078

Kaon and pion production in central Au + Au collisions at sqrt(s_NN) = 62.4 GeV

I. C. Arsene^*
, I. G. Bearden
, D. Beavis
, S. Bekele
, C. Besliu
, B. Budick
, H. Bøggild
, C. Chasman
, C. H. Christensen
, P. Christiansen
, H. H. Dalsgaard
, R. Debbe
, J. J. Gaardhøje
, K. Hagel
, H. Ito
, A. Jipa
, E. B. Johnson
, C. E. Jørgensen
, R. Karabowicz
, N. Katrynska

E. J. Kim, T. M. Larsen, J. H. Lee, G. Løvhøiden, Z. Majka, M. J. Murray, J. Natowitz, B. S. Nielsen, C. Nygaard, D. Pal, A. Qviller, F. Rami, C. Ristea, O. Ristea, D. Röhrich, S. J. Sanders, P. Staszel, T. S. Tveter, F. Videbæk, R. Wada, H. Yang, Z. Yin, I. S. Zgura

^*Corresponding author for this work

Physics Education

University of Oslo
University of Copenhagen
Brookhaven National Laboratory
University of Kansas
University of Bucharest
New York University
Texas A&M University
Jagiellonian University in Kraków
Université de Strasbourg
University of Bergen
Institute of Space Science (ISS)

Research output: Contribution to journal › Journal article › peer-review

35 Scopus citations

Abstract

Invariant p_T spectra and rapidity densities covering a large rapidity range (- 0.1 < y < 3.5) are presented for π^± and K^± mesons from central Au + Au collisions at sqrt(s_NN) = 62.4 GeV. The mid-rapidity yields of meson particles relative to their anti-particles are found to be close to unity (π^- / π⁺ ∼ 1, K^- / K⁺ ∼ 0.85) while the anti-proton to proton ratio is over(p, ̄) / p ∼ 0.49. The rapidity dependence of the π^- / π⁺ ratio is consistent with a small increase towards forward rapidities while the K^- / K⁺ and over(p, ̄) / p ratios show a steep decrease to ∼0.3 for kaons and 0.022 for protons at y ∼ 3. It is observed that the kaon production relative to its own anti-particle as well as to pion production in wide rapidity and energy ranges shows an apparent universal behavior consistent with the baryo-chemical potential, as deduced from the over(p, ̄) / p ratio, being the driving parameter.

Original language	English
Pages (from-to)	36-41
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	687
Issue number	1
DOIs	https://doi.org/10.1016/j.physletb.2010.02.078
State	Published - 2010.04.5

Keywords

Baryon chemical potential
Heavy ion collisions
Strangeness enhancement

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10.1016/j.physletb.2010.02.078

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Arsene, I. C., Bearden, I. G., Beavis, D., Bekele, S., Besliu, C., Budick, B., Bøggild, H., Chasman, C., Christensen, C. H., Christiansen, P., Dalsgaard, H. H., Debbe, R., Gaardhøje, J. J., Hagel, K., Ito, H., Jipa, A., Johnson, E. B., Jørgensen, C. E., Karabowicz, R., ... Zgura, I. S. (2010). Kaon and pion production in central Au + Au collisions at sqrt(s_NN) = 62.4 GeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 687(1), 36-41. https://doi.org/10.1016/j.physletb.2010.02.078

@article{87e0d342971b462b82d28d4dbf634366,

title = "Kaon and pion production in central Au + Au collisions at sqrt(sNN) = 62.4 GeV",

abstract = "Invariant pT spectra and rapidity densities covering a large rapidity range (- 0.1 < y < 3.5) are presented for π± and K± mesons from central Au + Au collisions at sqrt(sNN) = 62.4 GeV. The mid-rapidity yields of meson particles relative to their anti-particles are found to be close to unity (π- / π+ ∼ 1, K- / K+ ∼ 0.85) while the anti-proton to proton ratio is over(p,{\= }) / p ∼ 0.49. The rapidity dependence of the π- / π+ ratio is consistent with a small increase towards forward rapidities while the K- / K+ and over(p,{\= }) / p ratios show a steep decrease to ∼0.3 for kaons and 0.022 for protons at y ∼ 3. It is observed that the kaon production relative to its own anti-particle as well as to pion production in wide rapidity and energy ranges shows an apparent universal behavior consistent with the baryo-chemical potential, as deduced from the over(p,{\= }) / p ratio, being the driving parameter.",

keywords = "Baryon chemical potential, Heavy ion collisions, Strangeness enhancement",

author = "Arsene, \{I. C.\} and Bearden, \{I. G.\} and D. Beavis and S. Bekele and C. Besliu and B. Budick and H. B{\o}ggild and C. Chasman and Christensen, \{C. H.\} and P. Christiansen and Dalsgaard, \{H. H.\} and R. Debbe and Gaardh{\o}je, \{J. J.\} and K. Hagel and H. Ito and A. Jipa and Johnson, \{E. B.\} and J{\o}rgensen, \{C. E.\} and R. Karabowicz and N. Katrynska and Kim, \{E. J.\} and Larsen, \{T. M.\} and Lee, \{J. H.\} and G. L{\o}vh{\o}iden and Z. Majka and Murray, \{M. J.\} and J. Natowitz and Nielsen, \{B. S.\} and C. Nygaard and D. Pal and A. Qviller and F. Rami and C. Ristea and O. Ristea and D. R{\"o}hrich and Sanders, \{S. J.\} and P. Staszel and Tveter, \{T. S.\} and F. Videb{\ae}k and R. Wada and H. Yang and Z. Yin and Zgura, \{I. S.\}",

year = "2010",

month = apr,

day = "5",

doi = "10.1016/j.physletb.2010.02.078",

language = "English",

volume = "687",

pages = "36--41",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

number = "1",

}

Arsene, IC, Bearden, IG, Beavis, D, Bekele, S, Besliu, C, Budick, B, Bøggild, H, Chasman, C, Christensen, CH, Christiansen, P, Dalsgaard, HH, Debbe, R, Gaardhøje, JJ, Hagel, K, Ito, H, Jipa, A, Johnson, EB, Jørgensen, CE, Karabowicz, R, Katrynska, N, Kim, EJ, Larsen, TM, Lee, JH, Løvhøiden, G, Majka, Z, Murray, MJ, Natowitz, J, Nielsen, BS, Nygaard, C, Pal, D, Qviller, A, Rami, F, Ristea, C, Ristea, O, Röhrich, D, Sanders, SJ, Staszel, P, Tveter, TS, Videbæk, F, Wada, R, Yang, H, Yin, Z & Zgura, IS 2010, 'Kaon and pion production in central Au + Au collisions at sqrt(s_NN) = 62.4 GeV', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 687, no. 1, pp. 36-41. https://doi.org/10.1016/j.physletb.2010.02.078

TY - JOUR

T1 - Kaon and pion production in central Au + Au collisions at sqrt(sNN) = 62.4 GeV

AU - Arsene, I. C.

AU - Bearden, I. G.

AU - Beavis, D.

AU - Bekele, S.

AU - Besliu, C.

AU - Budick, B.

AU - Bøggild, H.

AU - Chasman, C.

AU - Christensen, C. H.

AU - Christiansen, P.

AU - Dalsgaard, H. H.

AU - Debbe, R.

AU - Gaardhøje, J. J.

AU - Hagel, K.

AU - Ito, H.

AU - Jipa, A.

AU - Johnson, E. B.

AU - Jørgensen, C. E.

AU - Karabowicz, R.

AU - Katrynska, N.

AU - Kim, E. J.

AU - Larsen, T. M.

AU - Lee, J. H.

AU - Løvhøiden, G.

AU - Majka, Z.

AU - Murray, M. J.

AU - Natowitz, J.

AU - Nielsen, B. S.

AU - Nygaard, C.

AU - Pal, D.

AU - Qviller, A.

AU - Rami, F.

AU - Ristea, C.

AU - Ristea, O.

AU - Röhrich, D.

AU - Sanders, S. J.

AU - Staszel, P.

AU - Tveter, T. S.

AU - Videbæk, F.

AU - Wada, R.

AU - Yang, H.

AU - Yin, Z.

AU - Zgura, I. S.

PY - 2010/4/5

Y1 - 2010/4/5

N2 - Invariant pT spectra and rapidity densities covering a large rapidity range (- 0.1 < y < 3.5) are presented for π± and K± mesons from central Au + Au collisions at sqrt(sNN) = 62.4 GeV. The mid-rapidity yields of meson particles relative to their anti-particles are found to be close to unity (π- / π+ ∼ 1, K- / K+ ∼ 0.85) while the anti-proton to proton ratio is over(p, ̄) / p ∼ 0.49. The rapidity dependence of the π- / π+ ratio is consistent with a small increase towards forward rapidities while the K- / K+ and over(p, ̄) / p ratios show a steep decrease to ∼0.3 for kaons and 0.022 for protons at y ∼ 3. It is observed that the kaon production relative to its own anti-particle as well as to pion production in wide rapidity and energy ranges shows an apparent universal behavior consistent with the baryo-chemical potential, as deduced from the over(p, ̄) / p ratio, being the driving parameter.

AB - Invariant pT spectra and rapidity densities covering a large rapidity range (- 0.1 < y < 3.5) are presented for π± and K± mesons from central Au + Au collisions at sqrt(sNN) = 62.4 GeV. The mid-rapidity yields of meson particles relative to their anti-particles are found to be close to unity (π- / π+ ∼ 1, K- / K+ ∼ 0.85) while the anti-proton to proton ratio is over(p, ̄) / p ∼ 0.49. The rapidity dependence of the π- / π+ ratio is consistent with a small increase towards forward rapidities while the K- / K+ and over(p, ̄) / p ratios show a steep decrease to ∼0.3 for kaons and 0.022 for protons at y ∼ 3. It is observed that the kaon production relative to its own anti-particle as well as to pion production in wide rapidity and energy ranges shows an apparent universal behavior consistent with the baryo-chemical potential, as deduced from the over(p, ̄) / p ratio, being the driving parameter.

KW - Baryon chemical potential

KW - Heavy ion collisions

KW - Strangeness enhancement

UR - https://www.scopus.com/pages/publications/77949486532

U2 - 10.1016/j.physletb.2010.02.078

DO - 10.1016/j.physletb.2010.02.078

M3 - Journal article

AN - SCOPUS:77949486532

SN - 0370-2693

VL - 687

SP - 36

EP - 41

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1

ER -

Kaon and pion production in central Au + Au collisions at sqrt(s_NN) = 62.4 GeV

Abstract

Keywords

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