Measuring centrality with slow protons in proton-nucleus collisions at 18 GeV/c

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

doi:10.1103/PhysRevC.60.024902

Measuring centrality with slow protons in proton-nucleus collisions at 18 GeV/c

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

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Abstract

Experiment E910 has measured slow protons and deuterons from collisions of 18 GeV/c protons with Be, Cu, and Au targets at the BNL AGS. These correspond to the "grey tracks" first observed in emulsion experiments. We report on their momentum and angular distributions and investigate their use in measuring the centrality of a collision, as defined by the mean number of projectile-nucleon interactions. The relation between the measured N _grey and the mean number of interactions v(N _grey) is studied using several simple models, one newly proposed, as well as the RQMD event generator. RQMD is shown to reproduce the N _grey distribution, and exhibits a dependence of N _grey on centrality that is similar to the behavior of the simple models. We find a strong linear dependence of N _grey on v, with a constant of proportionality that varies with target. For the Au target, we report a relative systematic error for extracting v(N _grey) that lies between 10 and 20% over all N _grey.

Original language	English
Article number	024902
Pages (from-to)	249021-2490212
Number of pages	2241192
Journal	Physical Review C - Nuclear Physics
Volume	60
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.60.024902
State	Published - Aug 1999

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Chemakin, I., Cianciolo, V., Cole, B. A., Fernow, R., Frawley, A., Gilkes, M., Gushue, S., Hartouni, E. P., Hiejima, H., Justice, M., Kang, J. H., Kirk, H., Maeda, N., McGrath, R. L., Mioduszewski, S., Morrison, D., Moulson, M., Namboodiri, M. N., Rai, G., ... Zhang, Y. (1999). Measuring centrality with slow protons in proton-nucleus collisions at 18 GeV/c. Physical Review C - Nuclear Physics, 60(2), 249021-2490212. Article 024902. https://doi.org/10.1103/PhysRevC.60.024902

@article{47eb80363502425a945c1cce42228071,

title = "Measuring centrality with slow protons in proton-nucleus collisions at 18 GeV/c",

abstract = "Experiment E910 has measured slow protons and deuterons from collisions of 18 GeV/c protons with Be, Cu, and Au targets at the BNL AGS. These correspond to the {"}grey tracks{"} first observed in emulsion experiments. We report on their momentum and angular distributions and investigate their use in measuring the centrality of a collision, as defined by the mean number of projectile-nucleon interactions. The relation between the measured N grey and the mean number of interactions v(N grey) is studied using several simple models, one newly proposed, as well as the RQMD event generator. RQMD is shown to reproduce the N grey distribution, and exhibits a dependence of N grey on centrality that is similar to the behavior of the simple models. We find a strong linear dependence of N grey on v, with a constant of proportionality that varies with target. For the Au target, we report a relative systematic error for extracting v(N grey) that lies between 10 and 20% over all N grey.",

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

year = "1999",

month = aug,

doi = "10.1103/PhysRevC.60.024902",

language = "English",

volume = "60",

pages = "249021--2490212",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

number = "2",

}

Chemakin, I, Cianciolo, V, Cole, BA, Fernow, R, Frawley, A, Gilkes, M, Gushue, S, Hartouni, EP, Hiejima, H, Justice, M, Kang, JH, Kirk, H, Maeda, N, McGrath, RL, Mioduszewski, S, Morrison, D, Moulson, M, Namboodiri, MN, Rai, G, Read, K, Remsberg, L, Rosati, M, Shin, Y, Soltz, RA, Sorensen, S, Thomas, J, Torun, Y, Winter, D, Yang, X, Zajc, WA & Zhang, Y 1999, 'Measuring centrality with slow protons in proton-nucleus collisions at 18 GeV/c', Physical Review C - Nuclear Physics, vol. 60, no. 2, 024902, pp. 249021-2490212. https://doi.org/10.1103/PhysRevC.60.024902

TY - JOUR

T1 - Measuring centrality with slow protons in proton-nucleus collisions at 18 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. P.

AU - Hiejima, H.

AU - Justice, M.

AU - Kang, J. H.

AU - Kirk, H.

AU - Maeda, N.

AU - McGrath, R. L.

AU - Mioduszewski, S.

AU - Morrison, D.

AU - Moulson, M.

AU - Namboodiri, M. N.

AU - Rai, G.

AU - Read, K.

AU - Remsberg, L.

AU - Rosati, M.

AU - Shin, Y.

AU - Soltz, R. A.

AU - Sorensen, S.

AU - Thomas, J.

AU - Torun, Y.

AU - Winter, D.

AU - Yang, X.

AU - Zajc, W. A.

AU - Zhang, Y.

PY - 1999/8

Y1 - 1999/8

N2 - Experiment E910 has measured slow protons and deuterons from collisions of 18 GeV/c protons with Be, Cu, and Au targets at the BNL AGS. These correspond to the "grey tracks" first observed in emulsion experiments. We report on their momentum and angular distributions and investigate their use in measuring the centrality of a collision, as defined by the mean number of projectile-nucleon interactions. The relation between the measured N grey and the mean number of interactions v(N grey) is studied using several simple models, one newly proposed, as well as the RQMD event generator. RQMD is shown to reproduce the N grey distribution, and exhibits a dependence of N grey on centrality that is similar to the behavior of the simple models. We find a strong linear dependence of N grey on v, with a constant of proportionality that varies with target. For the Au target, we report a relative systematic error for extracting v(N grey) that lies between 10 and 20% over all N grey.

AB - Experiment E910 has measured slow protons and deuterons from collisions of 18 GeV/c protons with Be, Cu, and Au targets at the BNL AGS. These correspond to the "grey tracks" first observed in emulsion experiments. We report on their momentum and angular distributions and investigate their use in measuring the centrality of a collision, as defined by the mean number of projectile-nucleon interactions. The relation between the measured N grey and the mean number of interactions v(N grey) is studied using several simple models, one newly proposed, as well as the RQMD event generator. RQMD is shown to reproduce the N grey distribution, and exhibits a dependence of N grey on centrality that is similar to the behavior of the simple models. We find a strong linear dependence of N grey on v, with a constant of proportionality that varies with target. For the Au target, we report a relative systematic error for extracting v(N grey) that lies between 10 and 20% over all N grey.

UR - http://www.scopus.com/inward/record.url?scp=13044286013&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.60.024902

DO - 10.1103/PhysRevC.60.024902

M3 - Article

AN - SCOPUS:13044286013

SN - 0556-2813

VL - 60

SP - 249021

EP - 2490212

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 2

M1 - 024902

ER -

Measuring centrality with slow protons in proton-nucleus collisions at 18 GeV/c

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