The associated charged particle multiplicity of high-pT π0 and single-photon events

M. Diakonou; C. Kourkoumelis; L. K. Resvanis; T. A. Filippas; E. Fokitis; S. Karpathopoulos; A. M. Cnops; E. C. Fowler; D. M. Hood; T. Killian; T. Ludlam; R. B. Palmer; D. C. Rahm; P. Rehak; I. Stumer; D. Cockerill; C. W. Fabjan; A. Hallgren; M. Kreisler; D. Lissauer; I. Mannelli; W. Molzon; P. Mouzourakis; B. S. Nielsen; Y. Oren; L. Rosselt; W. J. Willis; O. Botner; H. Bøggild; E. Dahl-Jensen; I. Dahl-Jensen; G. Damgaard; K. H. Hansen; J. Hooper; R. Møller; S. Nielsen; B. Schistad; T. Akesson; S. Almehed; G. von Dardel; S. Henning; G. Jarlskog; B. Lörstad; A. Melin; U. Mjörnmark; A. Nilsson; L. Svensson; M. G. Albrow; N. A. McCubbin; O. Benary; S. Dagan

doi:10.1016/0370-2693(80)90454-2

The associated charged particle multiplicity of high-p_T π⁰ and single-photon events

M. Diakonou^*, C. Kourkoumelis, L. K. Resvanis, T. A. Filippas, E. Fokitis, S. Karpathopoulos, A. M. Cnops, E. C. Fowler, D. M. Hood, T. Killian, T. Ludlam, R. B. Palmer, D. C. Rahm, P. Rehak, I. Stumer, D. Cockerill, C. W. Fabjan, A. Hallgren, M. Kreisler, D. LissauerI. Mannelli, W. Molzon, P. Mouzourakis, B. S. Nielsen, Y. Oren, L. Rosselt, W. J. Willis, O. Botner, H. Bøggild, E. Dahl-Jensen, I. Dahl-Jensen, G. Damgaard, K. H. Hansen, J. Hooper, R. Møller, S. Nielsen, B. Schistad, T. Akesson, S. Almehed, G. von Dardel, S. Henning, G. Jarlskog, B. Lörstad, A. Melin, U. Mjörnmark, A. Nilsson, L. Svensson, M. G. Albrow, N. A. McCubbin, O. Benary, S. Dagan

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The associated charged particle multiplicities of high-p_T π⁰ and single-photon events were measured at the CERN intersecting storage rings using lead/liquid-argon calorimeters and a scintillation counter array placed around the intersection region. The average multiplicity on the trigger side for the single-photon events was found to be significantly lower than that for the π⁰ events. The away-side multiplicity for both π⁰ and single-photon events increases with the trigger particle p_T, but, at a fixed p_T, the direct photon sample was found to have a slightly lower average multiplicity. The differences in the event structure can be explained if a large fraction of the single photons are produced via qg → γq constituent scattering.

Original language	English
Pages (from-to)	301-306
Number of pages	6
Journal	Physics Letters B
Volume	91
Issue number	2
DOIs	https://doi.org/10.1016/0370-2693(80)90454-2
State	Published - 7 Apr 1980
Externally published	Yes

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10.1016/0370-2693(80)90454-2

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Diakonou, M., Kourkoumelis, C., Resvanis, L. K., Filippas, T. A., Fokitis, E., Karpathopoulos, S., Cnops, A. M., Fowler, E. C., Hood, D. M., Killian, T., Ludlam, T., Palmer, R. B., Rahm, D. C., Rehak, P., Stumer, I., Cockerill, D., Fabjan, C. W., Hallgren, A., Kreisler, M., ... Dagan, S. (1980). The associated charged particle multiplicity of high-p_T π⁰ and single-photon events. Physics Letters B, 91(2), 301-306. https://doi.org/10.1016/0370-2693(80)90454-2

@article{44411565a9074d21a50e7aa63ec43171,

title = "The associated charged particle multiplicity of high-pT π0 and single-photon events",

abstract = "The associated charged particle multiplicities of high-pT π0 and single-photon events were measured at the CERN intersecting storage rings using lead/liquid-argon calorimeters and a scintillation counter array placed around the intersection region. The average multiplicity on the trigger side for the single-photon events was found to be significantly lower than that for the π0 events. The away-side multiplicity for both π0 and single-photon events increases with the trigger particle pT, but, at a fixed pT, the direct photon sample was found to have a slightly lower average multiplicity. The differences in the event structure can be explained if a large fraction of the single photons are produced via qg → γq constituent scattering.",

author = "M. Diakonou and C. Kourkoumelis and Resvanis, {L. K.} and Filippas, {T. A.} and E. Fokitis and S. Karpathopoulos and Cnops, {A. M.} and Fowler, {E. C.} and Hood, {D. M.} and T. Killian and T. Ludlam and Palmer, {R. B.} and Rahm, {D. C.} and P. Rehak and I. Stumer and D. Cockerill and Fabjan, {C. W.} and A. Hallgren and M. Kreisler and D. Lissauer and I. Mannelli and W. Molzon and P. Mouzourakis and Nielsen, {B. S.} and Y. Oren and L. Rosselt and Willis, {W. J.} and O. Botner and H. B{\o}ggild and E. Dahl-Jensen and I. Dahl-Jensen and G. Damgaard and Hansen, {K. H.} and J. Hooper and R. M{\o}ller and S. Nielsen and B. Schistad and T. Akesson and S. Almehed and {von Dardel}, G. and S. Henning and G. Jarlskog and B. L{\"o}rstad and A. Melin and U. Mj{\"o}rnmark and A. Nilsson and L. Svensson and Albrow, {M. G.} and McCubbin, {N. A.} and O. Benary and S. Dagan",

note = "Funding Information: s Permanent address: Tel-Aviv University, Ramat Aviv, Israel. 6 On leave of absence from the University of Pisa, and INFN, Sezione di Pisa, Italy. 7 Supported by the Israel Academy of Science and Humanities, the Israel Commission for Basic Research.",

year = "1980",

month = apr,

day = "7",

doi = "10.1016/0370-2693(80)90454-2",

language = "אנגלית",

volume = "91",

pages = "301--306",

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

issn = "0370-2693",

publisher = "Elsevier",

number = "2",

}

Diakonou, M, Kourkoumelis, C, Resvanis, LK, Filippas, TA, Fokitis, E, Karpathopoulos, S, Cnops, AM, Fowler, EC, Hood, DM, Killian, T, Ludlam, T, Palmer, RB, Rahm, DC, Rehak, P, Stumer, I, Cockerill, D, Fabjan, CW, Hallgren, A, Kreisler, M, Lissauer, D, Mannelli, I, Molzon, W, Mouzourakis, P, Nielsen, BS, Oren, Y, Rosselt, L, Willis, WJ, Botner, O, Bøggild, H, Dahl-Jensen, E, Dahl-Jensen, I, Damgaard, G, Hansen, KH, Hooper, J, Møller, R, Nielsen, S, Schistad, B, Akesson, T, Almehed, S, von Dardel, G, Henning, S, Jarlskog, G, Lörstad, B, Melin, A, Mjörnmark, U, Nilsson, A, Svensson, L, Albrow, MG, McCubbin, NA, Benary, O & Dagan, S 1980, 'The associated charged particle multiplicity of high-p_T π⁰ and single-photon events', Physics Letters B, vol. 91, no. 2, pp. 301-306. https://doi.org/10.1016/0370-2693(80)90454-2

TY - JOUR

T1 - The associated charged particle multiplicity of high-pT π0 and single-photon events

AU - Diakonou, M.

AU - Kourkoumelis, C.

AU - Resvanis, L. K.

AU - Filippas, T. A.

AU - Fokitis, E.

AU - Karpathopoulos, S.

AU - Cnops, A. M.

AU - Fowler, E. C.

AU - Hood, D. M.

AU - Killian, T.

AU - Ludlam, T.

AU - Palmer, R. B.

AU - Rahm, D. C.

AU - Rehak, P.

AU - Stumer, I.

AU - Cockerill, D.

AU - Fabjan, C. W.

AU - Hallgren, A.

AU - Kreisler, M.

AU - Lissauer, D.

AU - Mannelli, I.

AU - Molzon, W.

AU - Mouzourakis, P.

AU - Nielsen, B. S.

AU - Oren, Y.

AU - Rosselt, L.

AU - Willis, W. J.

AU - Botner, O.

AU - Bøggild, H.

AU - Dahl-Jensen, E.

AU - Dahl-Jensen, I.

AU - Damgaard, G.

AU - Hansen, K. H.

AU - Hooper, J.

AU - Møller, R.

AU - Nielsen, S.

AU - Schistad, B.

AU - Akesson, T.

AU - Almehed, S.

AU - von Dardel, G.

AU - Henning, S.

AU - Jarlskog, G.

AU - Lörstad, B.

AU - Melin, A.

AU - Mjörnmark, U.

AU - Nilsson, A.

AU - Svensson, L.

AU - Albrow, M. G.

AU - McCubbin, N. A.

AU - Benary, O.

AU - Dagan, S.

N1 - Funding Information: s Permanent address: Tel-Aviv University, Ramat Aviv, Israel. 6 On leave of absence from the University of Pisa, and INFN, Sezione di Pisa, Italy. 7 Supported by the Israel Academy of Science and Humanities, the Israel Commission for Basic Research.

PY - 1980/4/7

Y1 - 1980/4/7

N2 - The associated charged particle multiplicities of high-pT π0 and single-photon events were measured at the CERN intersecting storage rings using lead/liquid-argon calorimeters and a scintillation counter array placed around the intersection region. The average multiplicity on the trigger side for the single-photon events was found to be significantly lower than that for the π0 events. The away-side multiplicity for both π0 and single-photon events increases with the trigger particle pT, but, at a fixed pT, the direct photon sample was found to have a slightly lower average multiplicity. The differences in the event structure can be explained if a large fraction of the single photons are produced via qg → γq constituent scattering.

AB - The associated charged particle multiplicities of high-pT π0 and single-photon events were measured at the CERN intersecting storage rings using lead/liquid-argon calorimeters and a scintillation counter array placed around the intersection region. The average multiplicity on the trigger side for the single-photon events was found to be significantly lower than that for the π0 events. The away-side multiplicity for both π0 and single-photon events increases with the trigger particle pT, but, at a fixed pT, the direct photon sample was found to have a slightly lower average multiplicity. The differences in the event structure can be explained if a large fraction of the single photons are produced via qg → γq constituent scattering.

UR - http://www.scopus.com/inward/record.url?scp=45949131082&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(80)90454-2

DO - 10.1016/0370-2693(80)90454-2

M3 - מאמר

AN - SCOPUS:45949131082

VL - 91

SP - 301

EP - 306

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 - 2

ER -

The associated charged particle multiplicity of high-p_T π⁰ and single-photon events

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