Forward and midrapidity like-particle ratios from p + p collisions at √s = 200 GeV

I. G. Bearden, D. Beavis, C. Besliu, B. Budick, H. Bøggild, C. Chasman, C. H. Christensen, P. Christiansen, J. Cibor, R. Debbe, E. Enger, J. J. Gaardhøje, M. Germinario, K. Hagel, A. Holm, A. K. Holme, H. Ito, E. Jakobsen, A. Jipa, F. JundtJ. I. Jørdre, C. E. Jørgensen, R. Karabowicz, T. Keutgen, E. J. Kim, T. Kozik, T. M. Larsen, J. H. Lee, Y. K. Lee, G. Løvhøiden, Z. Majka, A. Makeev, M. Mikelsen, M. J. Murray, J. Natowitz, B. S. Nielsen, J. Norris, K. Olchanski, D. Ouerdane, R. Płaneta, F. Rami, C. Ristea, D. Röhrich, B. H. Samset, D. Sandberg, S. J. Sanders, R. A. Scheetz, P. Staszel, T. S. Tveter, F. Videbæk, R. Wada, A. Wieloch, Z. Yin, I. S. Zgura

    Research output: Contribution to journalArticle

    Abstract

    We present a measurement of π-/π+, K-/K+ and p̄/p from p+p collisions at s=200 GeV over the rapidity range 0<y<3.4. For pT<2.0 GeV/c we see no significant transverse momentum dependence of the ratios. All three ratios are independent of rapidity for y≲1.5 and then steadily decline from y∼1.5 to y∼3. The π-/π+ ratio is below unity for y>2.0. The p̄/p ratio is very similar for p+p and 20% central Au + Au collisions at all rapidities. In the fragmentation region the three ratios seem to be independent of beam energy when viewed from the rest frame of one of the protons. Theoretical models based on quark-diquark breaking mechanisms overestimate the p̄/p ratio up to y≲3. Including additional mechanisms for baryon number transport such as baryon junctions leads to a better description of the data.

    Original languageEnglish (US)
    Pages (from-to)42-50
    Number of pages9
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume607
    Issue number1-2
    DOIs
    StatePublished - Feb 3 2005

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    baryons
    collisions
    fragmentation
    quarks
    protons
    energy

    Keywords

    • Baryon junctions
    • Forward rapidity
    • Limiting fragmentation
    • Particle ratios
    • Proton collisions

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Forward and midrapidity like-particle ratios from p + p collisions at √s = 200 GeV. / Bearden, I. G.; Beavis, D.; Besliu, C.; Budick, B.; Bøggild, H.; Chasman, C.; Christensen, C. H.; Christiansen, P.; Cibor, J.; Debbe, R.; Enger, E.; Gaardhøje, J. J.; Germinario, M.; Hagel, K.; Holm, A.; Holme, A. K.; Ito, H.; Jakobsen, E.; Jipa, A.; Jundt, F.; Jørdre, J. I.; Jørgensen, C. E.; Karabowicz, R.; Keutgen, T.; Kim, E. J.; Kozik, T.; Larsen, T. M.; Lee, J. H.; Lee, Y. K.; Løvhøiden, G.; Majka, Z.; Makeev, A.; Mikelsen, M.; Murray, M. J.; Natowitz, J.; Nielsen, B. S.; Norris, J.; Olchanski, K.; Ouerdane, D.; Płaneta, R.; Rami, F.; Ristea, C.; Röhrich, D.; Samset, B. H.; Sandberg, D.; Sanders, S. J.; Scheetz, R. A.; Staszel, P.; Tveter, T. S.; Videbæk, F.; Wada, R.; Wieloch, A.; Yin, Z.; Zgura, I. S.

    In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 607, No. 1-2, 03.02.2005, p. 42-50.

    Research output: Contribution to journalArticle

    Bearden, IG, Beavis, D, Besliu, C, Budick, B, Bøggild, H, Chasman, C, Christensen, CH, Christiansen, P, Cibor, J, Debbe, R, Enger, E, Gaardhøje, JJ, Germinario, M, Hagel, K, Holm, A, Holme, AK, Ito, H, Jakobsen, E, Jipa, A, Jundt, F, Jørdre, JI, Jørgensen, CE, Karabowicz, R, Keutgen, T, Kim, EJ, Kozik, T, Larsen, TM, Lee, JH, Lee, YK, Løvhøiden, G, Majka, Z, Makeev, A, Mikelsen, M, Murray, MJ, Natowitz, J, Nielsen, BS, Norris, J, Olchanski, K, Ouerdane, D, Płaneta, R, Rami, F, Ristea, C, Röhrich, D, Samset, BH, Sandberg, D, Sanders, SJ, Scheetz, RA, Staszel, P, Tveter, TS, Videbæk, F, Wada, R, Wieloch, A, Yin, Z & Zgura, IS 2005, 'Forward and midrapidity like-particle ratios from p + p collisions at √s = 200 GeV', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 607, no. 1-2, pp. 42-50. https://doi.org/10.1016/j.physletb.2004.12.064
    Bearden, I. G. ; Beavis, D. ; Besliu, C. ; Budick, B. ; Bøggild, H. ; Chasman, C. ; Christensen, C. H. ; Christiansen, P. ; Cibor, J. ; Debbe, R. ; Enger, E. ; Gaardhøje, J. J. ; Germinario, M. ; Hagel, K. ; Holm, A. ; Holme, A. K. ; Ito, H. ; Jakobsen, E. ; Jipa, A. ; Jundt, F. ; Jørdre, J. I. ; Jørgensen, C. E. ; Karabowicz, R. ; Keutgen, T. ; Kim, E. J. ; Kozik, T. ; Larsen, T. M. ; Lee, J. H. ; Lee, Y. K. ; Løvhøiden, G. ; Majka, Z. ; Makeev, A. ; Mikelsen, M. ; Murray, M. J. ; Natowitz, J. ; Nielsen, B. S. ; Norris, J. ; Olchanski, K. ; Ouerdane, D. ; Płaneta, R. ; Rami, F. ; Ristea, C. ; Röhrich, D. ; Samset, B. H. ; Sandberg, D. ; Sanders, S. J. ; Scheetz, R. A. ; Staszel, P. ; Tveter, T. S. ; Videbæk, F. ; Wada, R. ; Wieloch, A. ; Yin, Z. ; Zgura, I. S. / Forward and midrapidity like-particle ratios from p + p collisions at √s = 200 GeV. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2005 ; Vol. 607, No. 1-2. pp. 42-50.
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    abstract = "We present a measurement of π-/π+, K-/K+ and p̄/p from p+p collisions at s=200 GeV over the rapidity range 02.0. The p̄/p ratio is very similar for p+p and 20{\%} central Au + Au collisions at all rapidities. In the fragmentation region the three ratios seem to be independent of beam energy when viewed from the rest frame of one of the protons. Theoretical models based on quark-diquark breaking mechanisms overestimate the p̄/p ratio up to y≲3. Including additional mechanisms for baryon number transport such as baryon junctions leads to a better description of the data.",
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    T1 - Forward and midrapidity like-particle ratios from p + p collisions at √s = 200 GeV

    AU - Bearden, I. G.

    AU - Beavis, D.

    AU - Besliu, C.

    AU - Budick, B.

    AU - Bøggild, H.

    AU - Chasman, C.

    AU - Christensen, C. H.

    AU - Christiansen, P.

    AU - Cibor, J.

    AU - Debbe, R.

    AU - Enger, E.

    AU - Gaardhøje, J. J.

    AU - Germinario, M.

    AU - Hagel, K.

    AU - Holm, A.

    AU - Holme, A. K.

    AU - Ito, H.

    AU - Jakobsen, E.

    AU - Jipa, A.

    AU - Jundt, F.

    AU - Jørdre, J. I.

    AU - Jørgensen, C. E.

    AU - Karabowicz, R.

    AU - Keutgen, T.

    AU - Kim, E. J.

    AU - Kozik, T.

    AU - Larsen, T. M.

    AU - Lee, J. H.

    AU - Lee, Y. K.

    AU - Løvhøiden, G.

    AU - Majka, Z.

    AU - Makeev, A.

    AU - Mikelsen, M.

    AU - Murray, M. J.

    AU - Natowitz, J.

    AU - Nielsen, B. S.

    AU - Norris, J.

    AU - Olchanski, K.

    AU - Ouerdane, D.

    AU - Płaneta, R.

    AU - Rami, F.

    AU - Ristea, C.

    AU - Röhrich, D.

    AU - Samset, B. H.

    AU - Sandberg, D.

    AU - Sanders, S. J.

    AU - Scheetz, R. A.

    AU - Staszel, P.

    AU - Tveter, T. S.

    AU - Videbæk, F.

    AU - Wada, R.

    AU - Wieloch, A.

    AU - Yin, Z.

    AU - Zgura, I. S.

    PY - 2005/2/3

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    N2 - We present a measurement of π-/π+, K-/K+ and p̄/p from p+p collisions at s=200 GeV over the rapidity range 02.0. The p̄/p ratio is very similar for p+p and 20% central Au + Au collisions at all rapidities. In the fragmentation region the three ratios seem to be independent of beam energy when viewed from the rest frame of one of the protons. Theoretical models based on quark-diquark breaking mechanisms overestimate the p̄/p ratio up to y≲3. Including additional mechanisms for baryon number transport such as baryon junctions leads to a better description of the data.

    AB - We present a measurement of π-/π+, K-/K+ and p̄/p from p+p collisions at s=200 GeV over the rapidity range 02.0. The p̄/p ratio is very similar for p+p and 20% central Au + Au collisions at all rapidities. In the fragmentation region the three ratios seem to be independent of beam energy when viewed from the rest frame of one of the protons. Theoretical models based on quark-diquark breaking mechanisms overestimate the p̄/p ratio up to y≲3. Including additional mechanisms for baryon number transport such as baryon junctions leads to a better description of the data.

    KW - Baryon junctions

    KW - Forward rapidity

    KW - Limiting fragmentation

    KW - Particle ratios

    KW - Proton collisions

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    U2 - 10.1016/j.physletb.2004.12.064

    DO - 10.1016/j.physletb.2004.12.064

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    VL - 607

    SP - 42

    EP - 50

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

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

    SN - 0370-2693

    IS - 1-2

    ER -