Charged particle multiplicity in e(+)e(-)-&gt; q(q)over-bar events at 161
and 172 GeV and from the decay of the W boson

Abreu, P
Adam, W
Adye, T
Ajinenko, I
Alekseev, GD and
Alemany, R
Allport, PP
Almehed, S
Amaldi, U
Amato, S and
Andersson, P
Andreazza, A
Antilogus, P
Apel, WD
Arnoud,
Y
Asman, B
Augustin, JE
Augustinus, A
Baillon, P and
Bambade, P
Barao, F
Barbi, M
Bardin, DY
Barker, G and
Baroncelli, A
Barring, O
Bates, MJ
Battaglia, M and
Baubillier, M
Baudot, J
Becks, KH
Begalli, M
Beilliere,
P
Belokopytov, Y
Belous, K
Benvenuti, AC
Berat, C and
Berggren, M
Bertini, D
Bertrand, D
Besancon, M
Bianchi,
F
Bigi, M
Bilenky, MS
Billoir, P
Bizouard, MA
Bloch,
D
Blume, M
Bonesini, M
Bonivento, W
Boonekamp, M and
Booth, PSL
Borgland, AW
Borisov, G
Bosio, C
Botner, O
and Boudinov, E
Bouquet, B
Bourdarios, C
Bowcock, TJV and
Bozzo, M
Branchini, P
Brand, KD
Brenke, T
Brenner, RA
and Brown, RCA
Bruckman, P
Brunet, JM
Bugge, L
Buran, T
and Burgsmueller, T
Buschmann, P
Cabrera, S
Caccia, M and
Calvi, M
Rozas, AJC
Camporesi, T
Canale, V
Canepa, M and
Carena, F
Carroll, L
Caso, C
Gimenez, MVC
Cattai, A and
Cavallo, FR
Chabaud, V
Charpentier, P
Chaussard, L and
Checchia, P
Chelkov, GA
Chen, M
Chierici, R
Chliapnikov,
P
Chochula, P
Chorowicz, V
Chudoba, J
Cindro, V and
Collins, P
Colomer, M
Contri, R
Cortina, E
Cosme, G and
Cossutti, F
Cowell, JH
Crawley, HB
Crennell, D
Crosetti,
G
Maestro, JC
Czellar, S
Dahm, J
Dalmagne, B and
Damgaard, G
Dauncey, PD
Davenport, M
Da Silva, W and
Deghorain, A
Della Ricca, G
Delpierre, P
Demaria, N
De
Angelis, A
De Boer, W
De Brabandere, S
De Clercq, C
De
la Vaissiere, C
De Lotto, B
De Min, A
De Paula, L and
Dijkstra, H
Di Ciaccio, L
Di Diodato, A
Djannati, A and
Dolbeau, J
Doroba, K
Dracos, M
Drees, J
Drees, KA and
Dris, M
Durand, JD
Edsall, D
Ehret, R
Eigen, G and
Ekelof, T
Ekspong, G
Elsing, M
Engel, JP
Erzen, B and
Santo, ME
Falk, E
Fanourakis, G
Fassouliotis, D
Feindt,
M
Fenyuk, A
Ferrari, P
Ferrer, A
Fichet, S
Filippas,
TA
Firestone, A
Fischer, PA
Foeth, H
Fokitis, E and
Fontanelli, F
Formenti, F
Franek, B
Frodesen, AG and
Fruhwirth, R
Fulda-Quenzer, F
Fuster, J
Galloni, A and
Gamba, D
Gandelman, M
Garcia, C
Garcia, J
Gaspar, C and
Gasparini, U
Gavillet, P
Gazis, EN
Gele, D
Gerber, JP
and Gerdyukov, L
Gokieli, R
Golob, B
Goncalves, P
Gopal,
G
Gorn, L
Gorski, M
Gouz, Y
Gracco, V
Graziani, E
and Green, C
Grefrath, A
Gris, P
Grosdidier, G
Grzelak,
K
Gunther, M
Guy, J
Hahn, F
Hahn, S
Hajduk, Z and
Hallgren, A
Hamacher, K
Harris, FJ
Hedberg, V
Henriques,
R
Hernandez, JJ
Herquet, P
Herr, H
Hessing, TL and
Heuser, JM
Higon, E
Holmgren, SO
Holt, PJ
Holthuizen, D
and Hoorelbeke, S
Houlden, M
Hrubec, J
Huet, K and
Hultqvist, K
Jackson, JN
Jacobsson, R
Jalocha, P
Janik,
R
Jarlskog, C
Jarlskog, G
Jarry, P
Jean-Marie, B and
Johansson, EK
Jonsson, L
Jonsson, P
Joram, C
Juillot, P
and Kaiser, M
Kapusta, F
Karafasoulis, K
Karvelas, E and
Katsanevas, S
Katsoufis, EC
Keranen, R
Khokhlov, Y and
Khomenko, BA
Khovanski, NN
King, B
Kjaer, NJ
Klapp, O
and Klein, H
Kluit, P
Knoblauch, D
Kokkinias, P and
Koratzinos, M
Korcyl, K
Kostioukhine, V
Kourkoumelis, C and
Kouznetsov, O
Krammer, M
Kreuter, C
Kronkvist, I
Krstic,
J
Krumstein, Z
Krupinski, W
Kubinec, P
Kucewicz, W and
Kurvinen, K
Lacasta, C
Laktineh, I
Lamsa, JW
Lanceri, L
and Lane, DW
Langefeld, P
Laugier, JP
Lauhakangas, R and
Leder, G
Ledroit, F
Lefebure, V
Legan, CK
Leisos, A and
Leitner, R
Lemonne, J
Lenzen, G
Lepeltier, V
Lesiak, T
and Lethuillier, M
Libby, J
Liko, D
Lipniacka, A
Lippi,
I
Loerstad, B
Loken, JG
Lopez, JM
Loukas, D
Lutz, P
and Lyons, L
MacNaughton, J
Maehlum, G
Mahon, JR
Maio, A
and Malmgren, TGM
Malychev, V
Mandl, F
Marco, J
Marco, R
and Marechal, B
Margoni, M
Marin, JC
Mariotti, C
Markou,
A
Martinez-Rivero, C
Martinez-Vidal, F
Garcia, SMI and
Masik, J
Matorras, F
Matteuzzi, C
Matthiae, G
Mazzucato,
M
Mc Cubbin, M
Mc Kay, R
Mc Nulty, R
Mc Pherson, G and
Medbo, J
Meroni, C
Meyer, S
Meyer, WT
Michelotto, M and
Migliore, E
Mirabito, L
Mitaroff, WA
Mjoernmark, U
Moa,
T
Moeller, R
Moenig, K
Monge, MR
Morettini, P and
Mueller, H
Muenich, K
Mulders, M
Mundim, LM
Murray, WJ
and Muryn, B
Myatt, G
Myklebust, T
Naraghi, F
Navarria,
FL
Navas, S
Nawrocki, K
Negri, P
Nemecek, S
Neumann,
W
Neumeister, N
Nicolaidou, R
Nielsen, BS
Nieuwenhuizen,
M
Nikolaenko, V
Nikolenko, M
Niss, P
Nomerotski, A and
Normand, A
Nygren, A
Oberschulte-Beckmann, W
Obraztsov, V
and Olshevski, AG
Onofre, A
Orava, R
Orazi, G
Ortuno, S
and Osterberg, K
Ouraou, A
Paganini, P
Paganoni, M and
Paiano, S
Pain, R
Palka, H
Papadopoulou, TD and
Papageorgiou, K
Pape, L
Parkes, C
Parodi, F
Parzefall, U
and Passeri, A
Pegoraro, M
Peralta, L
Pernegger, H and
Pernicka, M
Perrotta, A
Petridou, C
Petrolini, A and
Phillips, HT
Piana, G
Pierre, F
Pimenta, M
Piotto, E and
Podobnik, T
Podobrin, O
Pol, ME
Polok, G
Poropat, P and
Pozdniakov, V
Privitera, P
Pukhaeva, N
Pullia, A and
Radojicic, D
Ragazzi, S
Rahmani, H
Ratoff, PN
Read, AL
and Reale, M
Rebecchi, P
Redaelli, NG
Regler, M
Reid, D
and Reinhardt, R
Renton, PB
Resvanis, LK
Richard, F and
Ridky, J
Rinaudo, G
Rohne, O
Romero, A
Ronchese, P and
Roos, L
Rosenberg, EI
Rosinsky, P
Roudeau, P
Rovelli, T
and Ruhlmann-Kleider, V
Ruiz, A
Rybicki, K
Saarikko, H and
Sacquin, Y
Sadovsky, A
Sajot, G
Salt, J
Sannino, M and
Schneider, H
Schwickerath, U
Schyns, MAE
Sciolla, G and
Scuri, F
Seager, P
Sedykh, Y
Segar, AM
Seitz, A and
Sekulin, R
Serbelloni, L
Shellard, RC
Sheridan, A and
Siegrist, P
Silvestre, R
Simonetto, F
Sisakian, AN and
Skaali, TB
Smadja, G
Smirnov, N
Smirnova, O
Smith, GR
and Solovianov, O
Sosnowski, R
Souza-Santos, D
Spassov, T
and Spiriti, E
Sponholz, P
Squarcia, S
Stampfer, D and
Stanescu, C
Stanic, S
Stapnes, S
Stavitski, I
Stevenson,
K
Stocchi, A
Strauss, J
Strub, R
Stugu, B and
Szczekowski, M
Szeptycka, M
Tabarelli, T
Tavernet, JP and
Tchikilev, O
Tegenfeldt, F
Terranova, F
Tomas, J and
Tilquin, A
Timmermans, J
Tkatchev, LG
Todorov, T and
Todorova, S
Toet, DZ
Tomaradze, A
Tome, B
Tonazzo, A and
Tortora, L
Transtromer, G
Treille, D
Tristram, G and
Trombini, A
Troncon, C
Tsirou, A
Turluer, ML
Tyapkin, IA
and Tyndel, M
Tzamarias, S
Ueberschaer, B
Ullaland, O and
Uvarov, V
Valenti, G
Vallazza, E
Van Apeldoorn, GW
Van
Dam, P
Van Eldik, J
Van Lysebetten, A
Vassilopoulos, N and
Vegni, G
Ventura, L
Venus, W
Verbeure, F
Verlato, M and
Vertogradov, LS
Vilanova, D
Vincent, P
Vitale, L
Vlasov,
E
Vodopyanov, AS
Vrba, V
Wahlen, H
Walck, C
Waldner,
F
Weiser, C
Wetherell, AM
Wicke, D
Wickens, JH and
Wielers, M
Wilkinson, GR
Williams, WSC
Winter, M
Witek,
M
Wlodek, T
Yi, J
Yip, K
Yushchenko, O
Zach, F and
Zaitsev, A
Zalewska, A
Zalewski, P
Zavrtanik, D and
Zevgolatakos, E
Zimin, NI
Zucchelli, GC
Zumerle, G and
DELPHI Collaborat

Charged particle multiplicity in e(+)e(-)-> q(q)over-bar events at 161 and 172 GeV and from the decay of the W boson

Authors: P Abreu Adam, W Adye, T Ajinenko, I Alekseev, GD and Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S and Andersson, P Andreazza, A Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P and Bambade, P Barao, F Barbi, M Bardin, DY Barker, G and Baroncelli, A Barring, O Bates, MJ Battaglia, M and Baubillier, M Baudot, J Becks, KH Begalli, M Beilliere, P Belokopytov, Y Belous, K Benvenuti, AC Berat, C and Berggren, M Bertini, D Bertrand, D Besancon, M Bianchi, F Bigi, M Bilenky, MS Billoir, P Bizouard, MA Bloch, D Blume, M Bonesini, M Bonivento, W Boonekamp, M and Booth, PSL Borgland, AW Borisov, G Bosio, C Botner, O and Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV and Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA and Brown, RCA Bruckman, P Brunet, JM Bugge, L Buran, T and Burgsmueller, T Buschmann, P Cabrera, S Caccia, M and Calvi, M Rozas, AJC Camporesi, T Canale, V Canepa, M and Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A and Cavallo, FR Chabaud, V Charpentier, P Chaussard, L and Checchia, P Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J Cindro, V and Collins, P Colomer, M Contri, R Cortina, E Cosme, G and Cossutti, F Cowell, JH Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S Dahm, J Dalmagne, B and Damgaard, G Dauncey, PD Davenport, M Da Silva, W and Deghorain, A Della Ricca, G Delpierre, P Demaria, N De Angelis, A De Boer, W De Brabandere, S De Clercq, C De la Vaissiere, C De Lotto, B De Min, A De Paula, L and Dijkstra, H Di Ciaccio, L Di Diodato, A Djannati, A and Dolbeau, J Doroba, K Dracos, M Drees, J Drees, KA and Dris, M Durand, JD Edsall, D Ehret, R Eigen, G and Ekelof, T Ekspong, G Elsing, M Engel, JP Erzen, B and Santo, ME Falk, E Fanourakis, G Fassouliotis, D Feindt, M Fenyuk, A Ferrari, P Ferrer, A Fichet, S Filippas, TA Firestone, A Fischer, PA Foeth, H Fokitis, E and Fontanelli, F Formenti, F Franek, B Frodesen, AG and Fruhwirth, R Fulda-Quenzer, F Fuster, J Galloni, A and Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C and Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP and Gerdyukov, L Gokieli, R Golob, B Goncalves, P Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E and Green, C Grefrath, A Gris, P Grosdidier, G Grzelak, K Gunther, M Guy, J Hahn, F Hahn, S Hajduk, Z and Hallgren, A Hamacher, K Harris, FJ Hedberg, V Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL and Heuser, JM Higon, E Holmgren, SO Holt, PJ Holthuizen, D and Hoorelbeke, S Houlden, M Hrubec, J Huet, K and Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P Jean-Marie, B and Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P and Kaiser, M Kapusta, F Karafasoulis, K Karvelas, E and Katsanevas, S Katsoufis, EC Keranen, R Khokhlov, Y and Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klapp, O and Klein, H Kluit, P Knoblauch, D Kokkinias, P and Koratzinos, M Korcyl, K Kostioukhine, V Kourkoumelis, C and Kouznetsov, O Krammer, M Kreuter, C Kronkvist, I Krstic, J Krumstein, Z Krupinski, W Kubinec, P Kucewicz, W and Kurvinen, K Lacasta, C Laktineh, I Lamsa, JW Lanceri, L and Lane, DW Langefeld, P Laugier, JP Lauhakangas, R and Leder, G Ledroit, F Lefebure, V Legan, CK Leisos, A and Leitner, R Lemonne, J Lenzen, G Lepeltier, V Lesiak, T and Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P and Lyons, L MacNaughton, J Maehlum, G Mahon, JR Maio, A and Malmgren, TGM Malychev, V Mandl, F Marco, J Marco, R and Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Martinez-Rivero, C Martinez-Vidal, F Garcia, SMI and Masik, J Matorras, F Matteuzzi, C Matthiae, G Mazzucato, M Mc Cubbin, M Mc Kay, R Mc Nulty, R Mc Pherson, G and Medbo, J Meroni, C Meyer, S Meyer, WT Michelotto, M and Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR Morettini, P and Mueller, H Muenich, K Mulders, M Mundim, LM Murray, WJ and Muryn, B Myatt, G Myklebust, T Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Nemecek, S Neumann, W Neumeister, N Nicolaidou, R Nielsen, BS Nieuwenhuizen, M Nikolaenko, V Nikolenko, M Niss, P Nomerotski, A and Normand, A Nygren, A Oberschulte-Beckmann, W Obraztsov, V and Olshevski, AG Onofre, A Orava, R Orazi, G Ortuno, S and Osterberg, K Ouraou, A Paganini, P Paganoni, M and Paiano, S Pain, R Palka, H Papadopoulou, TD and Papageorgiou, K Pape, L Parkes, C Parodi, F Parzefall, U and Passeri, A Pegoraro, M Peralta, L Pernegger, H and Pernicka, M Perrotta, A Petridou, C Petrolini, A and Phillips, HT Piana, G Pierre, F Pimenta, M Piotto, E and Podobnik, T Podobrin, O Pol, ME Polok, G Poropat, P and Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A and Radojicic, D Ragazzi, S Rahmani, H Ratoff, PN Read, AL and Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D and Reinhardt, R Renton, PB Resvanis, LK Richard, F and Ridky, J Rinaudo, G Rohne, O Romero, A Ronchese, P and Roos, L Rosenberg, EI Rosinsky, P Roudeau, P Rovelli, T and Ruhlmann-Kleider, V Ruiz, A Rybicki, K Saarikko, H and Sacquin, Y Sadovsky, A Sajot, G Salt, J Sannino, M and Schneider, H Schwickerath, U Schyns, MAE Sciolla, G and Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A and Sekulin, R Serbelloni, L Shellard, RC Sheridan, A and Siegrist, P Silvestre, R Simonetto, F Sisakian, AN and Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR and Solovianov, O Sosnowski, R Souza-Santos, D Spassov, T and Spiriti, E Sponholz, P Squarcia, S Stampfer, D and Stanescu, C Stanic, S Stapnes, S Stavitski, I Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B and Szczekowski, M Szeptycka, M Tabarelli, T Tavernet, JP and Tchikilev, O Tegenfeldt, F Terranova, F Tomas, J and Tilquin, A Timmermans, J Tkatchev, LG Todorov, T and Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A and Tortora, L Transtromer, G Treille, D Tristram, G and Trombini, A Troncon, C Tsirou, A Turluer, ML Tyapkin, IA and Tyndel, M Tzamarias, S Ueberschaer, B Ullaland, O and Uvarov, V Valenti, G Vallazza, E Van Apeldoorn, GW Van Dam, P Van Eldik, J Van Lysebetten, A Vassilopoulos, N and Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M and Vertogradov, LS Vilanova, D Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H Walck, C Waldner, F Weiser, C Wetherell, AM Wicke, D Wickens, JH and Wielers, M Wilkinson, GR Williams, WSC Winter, M Witek, M Wlodek, T Yi, J Yip, K Yushchenko, O Zach, F and Zaitsev, A Zalewska, A Zalewski, P Zavrtanik, D and Zevgolatakos, E Zimin, NI Zucchelli, GC Zumerle, G and DELPHI Collaborat
Publication date: 1 January 1998
Publisher

Abstract

The data collected by DELPHI in 1996 have been used to measure the average charged particle multiplicities and dispersions in q (q) over bar events at centre-of-mass energies of root s = 161 GeV and root s = 172 GeV, and the average charge multiplicity in WW events at root s = 172 GeV. The multiplicities in q (q) over bar events are consistent with the evolution predicted by QCD. The dispersions in the multiplicity distributions are consistent with Koba-Nielsen-Olesen (KNO) scaling. The average multiplicity of charged particles in hadronic W decays has been measured for the first time; its value, 19.23 +/- 0.74(stat + syst), is consistent with that expected for an e(+)e(-) interaction at a centre-of-mass energy equal to the W mass. The charged particle multiplicity in W decays shows no evidence of effects of colour reconnection between partons from different W’s at the present level of statistics. (C) 1998 Elsevier Science B.V

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