Antiproton production in p+A collisions at 12.3 and 17.5 GeV/c

I. Chemakin; V. Cianciolo; B. A. Cole; R. Fernow; A. Frawley; M. Gilkes; S. Gushue; E. Hartouni; H. Hiejima; M. Justice; J. H. Kang; D. Keane; H. Kirk; M. Kreisler; N. Maeda; R. L. McGrath; S. Mioduszewski; D. Morrison; M. Moulson; N. Namboodiri; G. Rai; K. Read; L. Remsberg; M. Rosati; Y. Shin; R. Soltz; S. Sorensen; J. Thomas; Y. Torun; D. Winter; X. Yang; W. A. Zajc; Y. Zhang

doi:10.1103/PhysRevC.64.064908

Antiproton production in p+A collisions at 12.3 and 17.5 GeV/c

I. Chemakin, V. Cianciolo, B. A. Cole, R. Fernow, A. Frawley, M. Gilkes, S. Gushue, E. Hartouni, H. Hiejima, M. Justice, J. H. Kang, D. Keane, H. Kirk, M. Kreisler, N. Maeda, R. L. McGrath, S. Mioduszewski, D. Morrison, M. Moulson, N. NamboodiriG. Rai, K. Read, L. Remsberg, M. Rosati, Y. Shin, R. Soltz, S. Sorensen, J. Thomas, Y. Torun, D. Winter, X. Yang, W. A. Zajc, Y. Zhang

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Abstract

Inclusive and semi-inclusive measurements are presented for antiproton (p̄) production in proton-nucleus collisions at the Alternating Gradient Synchrotron (AGS). The inclusive yields per event increase strongly with increasing beam energy and decrease slightly with increasing target mass. The p̄ yield in 17.5 GeV/c p + Au collisions decreases with grey track multiplicity, N_g, for N_g>0, consistent with annihilation within the target nucleus. The relationship between N_g and the number of scatterings of the proton in the nucleus is used to estimate the p̄ annihilation cross section in the nuclear medium. The resulting cross section is at least a factor of 5 smaller than the free p̄-p annihilation cross section when assuming a small or negligible formation time. Only with a long formation time can the data be described with the free p̄-p annihilation cross section.

Original language	English
Article number	064908
Pages (from-to)	649081-649086
Number of pages	6
Journal	Physical Review C - Nuclear Physics
Volume	64
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.64.064908
State	Published - Dec 2001

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Chemakin, I., Cianciolo, V., Cole, B. A., Fernow, R., Frawley, A., Gilkes, M., Gushue, S., Hartouni, E., Hiejima, H., Justice, M., Kang, J. H., Keane, D., Kirk, H., Kreisler, M., Maeda, N., McGrath, R. L., Mioduszewski, S., Morrison, D., Moulson, M., ... Zhang, Y. (2001). Antiproton production in p+A collisions at 12.3 and 17.5 GeV/c. Physical Review C - Nuclear Physics, 64(6), 649081-649086. Article 064908. https://doi.org/10.1103/PhysRevC.64.064908

@article{7ad64443bcb643b589866261e913fcda,

title = "Antiproton production in p+A collisions at 12.3 and 17.5 GeV/c",

abstract = "Inclusive and semi-inclusive measurements are presented for antiproton ({\=p}) production in proton-nucleus collisions at the Alternating Gradient Synchrotron (AGS). The inclusive yields per event increase strongly with increasing beam energy and decrease slightly with increasing target mass. The {\=p} yield in 17.5 GeV/c p + Au collisions decreases with grey track multiplicity, Ng, for Ng>0, consistent with annihilation within the target nucleus. The relationship between Ng and the number of scatterings of the proton in the nucleus is used to estimate the {\=p} annihilation cross section in the nuclear medium. The resulting cross section is at least a factor of 5 smaller than the free {\=p}-p annihilation cross section when assuming a small or negligible formation time. Only with a long formation time can the data be described with the free {\=p}-p annihilation cross section.",

author = "I. Chemakin and V. Cianciolo and Cole, {B. A.} and R. Fernow and A. Frawley and M. Gilkes and S. Gushue and E. Hartouni and H. Hiejima and M. Justice and Kang, {J. H.} and D. Keane and H. Kirk and M. Kreisler and N. Maeda and McGrath, {R. L.} and S. Mioduszewski and D. Morrison and M. Moulson and N. Namboodiri and G. Rai and K. Read and L. Remsberg and M. Rosati and Y. Shin and R. Soltz and S. Sorensen and J. Thomas and Y. Torun and D. Winter and X. Yang and Zajc, {W. A.} and Y. Zhang",

year = "2001",

month = dec,

doi = "10.1103/PhysRevC.64.064908",

language = "English",

volume = "64",

pages = "649081--649086",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

number = "6",

}

Chemakin, I, Cianciolo, V, Cole, BA, Fernow, R, Frawley, A, Gilkes, M, Gushue, S, Hartouni, E, Hiejima, H, Justice, M, Kang, JH, Keane, D, Kirk, H, Kreisler, M, Maeda, N, McGrath, RL, Mioduszewski, S, Morrison, D, Moulson, M, Namboodiri, N, Rai, G, Read, K, Remsberg, L, Rosati, M, Shin, Y, Soltz, R, Sorensen, S, Thomas, J, Torun, Y, Winter, D, Yang, X, Zajc, WA & Zhang, Y 2001, 'Antiproton production in p+A collisions at 12.3 and 17.5 GeV/c', Physical Review C - Nuclear Physics, vol. 64, no. 6, 064908, pp. 649081-649086. https://doi.org/10.1103/PhysRevC.64.064908

TY - JOUR

T1 - Antiproton production in p+A collisions at 12.3 and 17.5 GeV/c

AU - Chemakin, I.

AU - Cianciolo, V.

AU - Cole, B. A.

AU - Fernow, R.

AU - Frawley, A.

AU - Gilkes, M.

AU - Gushue, S.

AU - Hartouni, E.

AU - Hiejima, H.

AU - Justice, M.

AU - Kang, J. H.

AU - Keane, D.

AU - Kirk, H.

AU - Kreisler, M.

AU - Maeda, N.

AU - McGrath, R. L.

AU - Mioduszewski, S.

AU - Morrison, D.

AU - Moulson, M.

AU - Namboodiri, N.

AU - Rai, G.

AU - Read, K.

AU - Remsberg, L.

AU - Rosati, M.

AU - Shin, Y.

AU - Soltz, R.

AU - Sorensen, S.

AU - Thomas, J.

AU - Torun, Y.

AU - Winter, D.

AU - Yang, X.

AU - Zajc, W. A.

AU - Zhang, Y.

PY - 2001/12

Y1 - 2001/12

N2 - Inclusive and semi-inclusive measurements are presented for antiproton (p̄) production in proton-nucleus collisions at the Alternating Gradient Synchrotron (AGS). The inclusive yields per event increase strongly with increasing beam energy and decrease slightly with increasing target mass. The p̄ yield in 17.5 GeV/c p + Au collisions decreases with grey track multiplicity, Ng, for Ng>0, consistent with annihilation within the target nucleus. The relationship between Ng and the number of scatterings of the proton in the nucleus is used to estimate the p̄ annihilation cross section in the nuclear medium. The resulting cross section is at least a factor of 5 smaller than the free p̄-p annihilation cross section when assuming a small or negligible formation time. Only with a long formation time can the data be described with the free p̄-p annihilation cross section.

AB - Inclusive and semi-inclusive measurements are presented for antiproton (p̄) production in proton-nucleus collisions at the Alternating Gradient Synchrotron (AGS). The inclusive yields per event increase strongly with increasing beam energy and decrease slightly with increasing target mass. The p̄ yield in 17.5 GeV/c p + Au collisions decreases with grey track multiplicity, Ng, for Ng>0, consistent with annihilation within the target nucleus. The relationship between Ng and the number of scatterings of the proton in the nucleus is used to estimate the p̄ annihilation cross section in the nuclear medium. The resulting cross section is at least a factor of 5 smaller than the free p̄-p annihilation cross section when assuming a small or negligible formation time. Only with a long formation time can the data be described with the free p̄-p annihilation cross section.

UR - http://www.scopus.com/inward/record.url?scp=4243438489&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.64.064908

DO - 10.1103/PhysRevC.64.064908

M3 - Article

AN - SCOPUS:4243438489

SN - 0556-2813

VL - 64

SP - 649081

EP - 649086

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 6

M1 - 064908

ER -

Antiproton production in p+A collisions at 12.3 and 17.5 GeV/c

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