Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/7179
Title: A direct observation of quark-gluon jet differences at LEP
Authors: Alexander, G
Allison, J
Allport, PP
Anderson, KJ
Arcelli, S
Armitage, JC
Ashton, P
Astbury, A
Axen, D
Azuelos, G
Bahan, GA
Smith, TJ
Snow, GA
Sobie, R
Springer, RW
Sproston, M
Bloodworth, IJ
Stephens, K
Stier, HE
Strom, D
Hochman, D
Mikenberg, G
Takeda, H
Takeshita, T
Taras, P
Tarem, S
Teixeira-Dias, P
Thackray, NJ
Tsukamoto, T
Bock, P
Turner, MF
Tysarczyk-Niemeyer, G
Mildenberger, J
Holl, B
Van Den Plas, D
Van Kooten, R
VanDalen, GJ
Vasseur, G
Virtue, CJ
Wagner, A
Wahl, C
Walker, JP
Bosch, HM
Miller, DJ
Ward, CP
Baines, JTM
Ward, DR
Watkins, PM
Watson, AT
Watson, NK
Weber, M
Weisz, S
Wells, PS
Wermes, N
Milstene, C
Weymann, M
Bougerolle, S
Homer, RJ
Whalley, MA
Wilson, GW
Wilson, JA
Wingerter, I
Winterer, V-H
Wood, NC
Wotton, S
Mir, R
Wyatt, TR
Yaari, R
Yang, Y
Hou, SR
Brabson, BB
Yekutieli, G
Zacharov, I
Zeuner, W
Zorn, GT
Breuker, H
Mohr, W
Brown, RM
Brun, R
Buijs, A
Burckhart, HJ
Howarth, CP
Capiluppi, P
Carnegie, RK
Carter, AA
Carter, JR
Chang, CY
Moisan, C
Charlton, DG
Chrin, JTM
Clarke, PEL
Cohen, I
Collins, WJ
Hughes-Jones, RE
Conboy, JE
Cooper, M
Couch, M
Coupland, M
Montanari, A
Cuffiani, M
Dado, S
Dallavalle, GM
De Jong, S
Debu, P
Deninno, MM
Humbert, R
Dieckmann, A
Dittmar, M
Dixit, MS
Mori, T
Duchovni, E
Duckeck, G
Duerdoth, IP
Dumas, DJP
Eckerlin, G
Elcombe, PA
Estabrooks, PG
Igo-Kemenes, P
Etzion, E
Fabbri, F
Becker, J
Fincke-Keeler, M
Fischer, HM
Fong, DG
Fukunaga, C
Gaidot, A
Ganel, O
Gary, JW
Gascon, J
Ihssen, H
McGowan, RF
Hemingway, RJ
Geddes, NI
Geich-Gimbel, C
Gensler, SW
Gentit, FX
Giacomelli, G
Gibson, V
Gibson, WR
Gillies, JD
Goldberg, J
Imrie, DC
Moss, MW
Goodrick, MJ
Gorn, W
Grandi, C
Gross, E
Hagemann, J
Hanson, G
Hansroul, M
Hargrove, CK
Harrison, PF
Hart, J
Mouthuy, T
Janissen, L
Hattersley, PM
Hauschild, M
Hawkes, CM
Heflin, E
Jawahery, A
Ball, AH
Jeffreys, PW
Jeremie, H
Jimack, M
Murphy, PG
Jobes, M
Jones, RWL
Jovanovic, P
Karlen, D
Kawagoe, K
Kawamoto, T
Keeler, RK
Banks, J
Kellogg, RG
Kennedy, BW
Nellen, B
Kleinwort, C
Klem, DE
Kobayashi, T
Kokott, TP
Komamiya, S
Köpke, L
Kowalewski, R
Kreutzmann, H
Barker, GJ
Von Krogh, J
Nguyen, HH
Kroll, J
Kuwano, M
Kyberd, P
Lafferty, GD
Lamarche, F
Larson, WJ
Layter, JG
Le Du, P
Leblanc, P
Barlow, RJ
Nozaki, M
Lee, AM
Lehto, MH
Lellouch, D
Lennert, P
Leroy, C
Lessard, L
Levegrun, S
Levinson, L
Lloyd, SL
Loebinger, FK
O'Neale, SW
Batley, JR
Lorah, JM
Lorazo, B
Losty, MJ
Lou, XC
Ludwig, J
Mannelli, M
Marcellini, S
Maringer, G
Martin, AJ
O'Neill, BP
Martin, JP
Beaudoin, G
Mashimo, T
Mättig, P
Maur, U
McMahon, TJ
McNutt, JR
Meijers, F
Menszner, D
Merritt, FS
Oakham, FG
Mes, H
Michelini, A
Beck, A
Middleton, RP
Odorici, F
Heuer, RD
Behnke, T
Ogg, M
Ogren, HO
Oh, H
Oram, CJ
Oreglia, MJ
Orito, S
Pansart, JP
Panzer-Steindel, B
Paschievici, P
Hill, JC
Patrick, GN
Bell, KW
Pawley, SJ
Pfister, P
Pilcher, JE
Pinfold, JL
Plane, DE
Poffenberger, P
Poli, B
Pouladdej, A
Hillier, SJ
Prebys, E
Pritchard, TW
Bella, G
Przysiezniak, H
Quast, G
Redmond, MW
Rees, DL
Riles, K
Robins, SA
Robinson, D
Hinshaw, DA
Rollnik, A
Roney, JM
Rossberg, S
Bethke, S
Rossi, AM
Routenburg, P
Runge, K
Runolfsson, O
Rust, DR
Sanghera, S
Ho, C
Sasaki, M
Schaile, AD
Schaile, O
Schappert, W
Biebel, O
Scharff-Hansen, P
Schenk, P
Von Der Schmitt, H
Schreiber, S
Schwarz, J
Hobbs, JD
Scott, WG
Settles, M
Shen, BC
Sherwood, P
Shypit, R
Binder, U
Simon, A
Singh, P
Siroli, GP
Skuja, A
Hobson, PR
Smith, AM
Issue Date: 1991
Publisher: Elsevier
Citation: Physics Letters B, 265(3-4): 462 - 474, Aug 1991
Abstract: Quark and gluon jets in e+e− three-jet events at LEP are identified using lepton tagging of quark jets, through observation of semi-leptonic charm and bottom quark decays. Events with a symmetry under transposition of the energies and directions of a quark and gluon jet are selected: these quark and gluon jets have essentially the same energy and event environment and as a consequence their properties can be compared directly. The energy of the jets which are studied is about 24.5 GeV. In the cores of the jets, gluon jets are found to yield a softer particle energy spectrum than quark jets. Gluon jets are observed to be broader than quark jets, as seen from the shape of their particle momentum spectra both in and out of the three-jet event plane. The greater width of gluon jets relative to quark jets is also visible from the shapes of their multiplicity distributions. Little difference is observed, however, between the mean value of particle multiplicity for the two jet types.
Description: This is the post-print version of the Article - Copyright @ 1991 Elsevier.
URI: http://www.sciencedirect.com/science/article/pii/0370269391900822
http://bura.brunel.ac.uk/handle/2438/7179
DOI: http://dx.doi.org/10.1016/0370-2693(91)90082-2
ISSN: 0370-2693
Appears in Collections:Electronic and Computer Engineering
Dept of Electronic and Computer Engineering Research Papers

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