Please use this identifier to cite or link to this item: http://dl.merc.ac.ir/handle/Hannan/28505
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
Description: This is the post-print version of the Article - Copyright @ 1991 Elsevier.
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.
This study was supported by the Department of Energy, USA, National Science Foundation, USA, Science and Engineering Research Council, UK, Natural Sciences and Engineering Research Council, Canada, Israeli Ministry of Science, Minerva Gesellschaft, The Japanese Ministry of Education, Science and Culture (the Monbusho) and a grant under the Monbusho International Science Research Program, American Israeli Bi-national Science Foundation, Direction des Sciences de la Mati6re du Commissariat l'Energie Atomique, France, Bundesministerium for Forschung und Technologie, FRG, and the A.P. Sloan Foundation.
URI: http://www.sciencedirect.com/science/article/pii/0370269391900822
http://bura.brunel.ac.uk/handle/2438/7179
http://dx.doi.org/10.1016/0370-2693(91)90082-2
Other Identifiers: Physics Letters B, 265(3-4): 462 - 474, Aug 1991
0370-2693
Appears in Collections:College of Engineering, Design and Physical Sciences

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