MEASUREMENT OF THE CHARGED-PARTICLE MULTIPLICITY DISTRIBUTION IN HADRONIC-Z DECAYS

Decamp, D; Deschizeaux, B; Goy, C; Lees, Jp; Minard, Mn; Alemany, R; Crespo, Jm; Delfino, M; Fernandez, E; Gaitan, V; Garrido, L; Mir, Lm; Pacheco, A; Catanesi, Mg; Creanza, D; Depalma, M; Farilla, A; Iaselli, G; Maggi, G; Maggi, M; Natali, S; Nuzzo, S; Quattromini, M; Ranieri, A; Raso, G; Romano, F; Ruggieri, F; Selvaggi, G; Silvestris, L; Tempesta, P; Zito, G; Gao, Y; Hu, H; Huang, D; Huang, X; Lin, J; Lou, J; Qiao, C; Ruan, T; Wang, T; Xie, Y; Xu, D; Xu, R; Zhang, J; Zhao, W; Atwood, Wb; Bauerdick, Lat; Bird, F; Blucher, E; Bonvicini, G; Bossi, F; Boudreau, J; Burnett, Th; Drevermann, H; Forty, Rw; Grab, C; Hagelberg, R; Haywood, S; Hilgart, J; Jost, B; Kasemann, M; Knobloch, J; Lacourt, A; Lancon, E; Lehraus, I; Lohse, T; Lusiani, Alberto; Marchioro, A; Martinez, M; Mato, P; Menary, S; Meyer, T; Minten, A; Miotto, A; Miquel, R; Moser, Hg; Nash, J; Palazzi, P; Ranjard, F; Redlinger, G; Rolandi, L; Roth, A; Rothberg, J; Rotscheidt, H; Saich, M; Schlatter, D; Schmelling, M; Tejessy, W; Wachsmuth, H; Wasserbaech, S; Wiedenmann, W; Witzeling, W; Wotschack, J; Ajaltouni, Z; Badaud, F; Bardadinotwinowska, M; Bencheikh, Am; Elfellous, R; Falvard, A; Gay, P; Guicheney, C; Henrard, P; Jousset, J; Michel, B; Montret, Jc; Pallin, D; Perret, P; Proriol, J; Prulhiere, F; Stimpfl, G; Hansen, Jd; Hansen, Jr; Hansen, Ph; Mollerud, R; Nilsson, Bs; Efthymiopoulos, I; Simopoulou, E; Vayaki, A; Badier, J; Blondel, A; Bonneaud, G; Brient, Jc; Fouque, G; Gamess, A; Harvey, J; Orteu, S; Rosowsky, A; Rouge, A; Rumpf, M; Tanaka, R; Videau, H; Candlin, Dj; Veitch, E; Moneta, L; Parrini, G; Corden, M; Georgiopoulos, C; Ikeda, M; Lannutti, J; Levinthal, D; Mermikides, M; Sawyer, L; Antonelli, A; Baldini, R; Bencivenni, G; Bologna, G; Campana, P; Capon, G; Cerutti, F; Chiarella, V; Dettorrepiazzoli, B; Felici, G; Laurelli, P; Mannocchi, G; Murtas, F; Murtas, Gp; Passalacqua, L; Pepealtarelli, M; Picchi, P; Zografou, P; Altoon, B; Boyle, O; Colrain, P; Halley, Aw; Tenhave, I; Lynch, Jg; Maitland, W; Morton, Wt; Raine, C; Scarr, Jm; Smith, K; Thompson, As; Turnbull, Rm; Brandl, B; Braun, O; Geiges, R; Geweniger, C; Hanke, P; Hepp, V; Kluge, Ee; Maumary, Y; Putzer, A; Rensch, B; Stahl, A; Tittel, K; Wunsch, M; Belk, At; Beuselinck, R; Binnie, Dm; Cameron, W; Cattaneo, M; Dornan, Pj; Dugeay, S; Greene, Am; Hassard, Jf; Lieske, Nm; Patton, Sj; Payne, Dg; Phillips, Mj; Sedgbeer, Jk; Taylor, G; Tomalin, Ir; Wright, Ag; Girtler, P; Kuhn, D; Rudolph, G; Bowdery, Ck; Brodbeck, Tj; Finch, Aj; Foster, F; Hughes, G; Keemer, Nr; Nuttall, M; Patel, A; Rowlingson, Bs; Sloan, T; Snow, Sw; Whelan, Ep; Barczewski, T; Kleinknecht, K; Raab, J; Renk, B; Roehn, S; Sander, Hg; Schmidt, H; Steeg, F; Walther, Sm; Wolf, B; Aubert, Jj; Benchouk, C; Bernard, V; Bonissent, A; Carr, J; Coyle, P; Drinkard, J; Etienne, F; Papalexiou, S; Payre, P; Pietrzyk, B; Qian, Z; Rousseau, D; Schwemling, P; Talby, M; Adlung, S; Becker, H; Blum, W; Brown, D; Cattaneo, P; Cowan, G; Dehning, B; Dietl, H; Dydak, F; Fernandezbosman, M; Hanslkozanecka, T; Jahn, A; Kozanecki, W; Lange, E; Lauber, J; Lutjens, G; Lutz, G; Manner, W; Pan, Y; Richter, R; Schroder, J; Schwarz, As; Settles, R; Stierlin, U; Stdenis, R; Takashima, M; Thomas, J; Wolf, G; Bertin, V; Boucrot, J; Callot, O; Chen, X; Cordier, A; Davier, M; Grivaz, Jf; Gros, Mh; Heusse, P; Janot, P; Kim, Dw; Lediberder, F; Lefrancois, J; Lutz, Am; Veillet, Jj; Videau, I; Zhang, Z; Zomer, F; Abbaneo, D; Amendolia, Sr; Bagliesi, G; Batignani, G; Bosisio, L; Bottigli, U; Bradaschia, C; Carpinelli, M; Ciocci, Ma; Dellorso, R; Ferrante, I; Fidecaro, F; Foa, L; Focardi, E; Forti, F; Gatto, C; Giassi, A; Giorgi, Ma; Ligabue, Franco; Mannelli, Eb; Marrocchesi, Ps; Messineo, A; Palla, F; Sanguinetti, G; Steinberger, J; Tenchini, R; Tonelli, G; Triggiani, G; Vannini, C; Venturi, A; Verdini, Pg; Walsh, J; Carter, Jm; Green, Mg; March, Pv; Medcalf, T; Quazi, Is; Strong, Ja; West, Lr; Wildish, T; Botterill, Dr; Clifft, Rw; Edgecock, Tr; Edwards, M; Fisher, Sm; Jones, Tj; Norton, Pr; Salmon, Dp; Thompson, Jc; Blochdevaux, B; Colas, P; Locci, E; Loucatos, S; Monnier, E; Perez, P; Perlas, Ja; Perrier, F; Rander, J; Renardy, Jf; Roussarie, A; Schuller, Jp; Schwindling, J; Vallage, B; Ashman, Jg; Booth, Cn; Buttar, C; Carney, Re; Cartwright, S; Combley, F; Dogru, M; Hatfield, F; Martin, J; Parker, D; Reeves, P; Thompson, Lf; Barberio, E; Brandt, S; Grupen, C; Meinhard, H; Mirabito, L; Schafer, U; Seywerd, H; Ganis, G; Giannini, G; Gobbo, B; Ragusa, F; Stiegler, U; Bellantoni, L; Cinabro, D; Conway, Js; Cowen, Df; Feng, Z; Ferguson, Dps; Gao, Ys; Grahl, J; Harton, Jl; Jared, Rc; Johnson, Rp; Leclaire, Bw; Lishka, C; Pan, Yb; Pater, Jr; Saadi, Y; Sharma, V; Shi, Zh; Tang, Yh; Walsh, Am; Wear, Ja; Weber, Fv; Whitney, Mh; Wu, Sl; Zobernig, G; Denis Richard/C 8997 2012 Forti Francesco/H 3035 2011 Ferrante Isidoro/F 1017 2012, RI Perrier Frederic/A 5953 2011 ANTONELLI ANTONELLA/C 6238 2011 Buttar Craig/D 3706 2011 Stahl Achim/E 8846 2011 S. t.

doi:10.1016/0370-2693(91)90575-B

The charged particle multiplicity distribution of hadronic Z decays was measured on the peak of the Z resonance using the ALEPH detector at LEP. Using a model independent unfolding procedure the distribution was found to have a mean <n> = 20.85 +/- 0.24 and a dispersion D = 6.34 +/- 0.12. Comparison with lower energy data supports the KNO scaling hypothesis in the energy range square-root s = 29-91.25 GeV. At square-root s = 91.25 GeV the shape of the multiplicity distribution is well described by a log-normal distribution, as predicted from a cascading model for multi-particle production. The same model also successfully describes the energy dependence of the mean and width of the multiplicity distribution. A next-to-leading order QCD prediction in the frame-work of the modified leading-log approximation and local parton-hadron duality is found to fit the energy dependence of the mean but not the width of the charged multiplicity distribution, indicating that the width of the multiplicity distribution is a sensitive probe for higher order QCD or non-perturbative effects.

Titolo:	MEASUREMENT OF THE CHARGED-PARTICLE MULTIPLICITY DISTRIBUTION IN HADRONIC-Z DECAYS
Autori:	DECAMP D DESCHIZEAUX B GOY C LEES JP MINARD MN ALEMANY R CRESPO JM DELFINO M FERNANDEZ E GAITAN V GARRIDO L MIR LM PACHECO A CATANESI MG CREANZA D DEPALMA M FARILLA A IASELLI G MAGGI G MAGGI M NATALI S NUZZO S QUATTROMINI M RANIERI A RASO G ROMANO F RUGGIERI F SELVAGGI G SILVESTRIS L TEMPESTA P ZITO G GAO Y HU H HUANG D HUANG X LIN J LOU J QIAO C RUAN T WANG T XIE Y XU D XU R ZHANG J ZHAO W ATWOOD WB BAUERDICK LAT BIRD F BLUCHER E BONVICINI G BOSSI F BOUDREAU J BURNETT TH DREVERMANN H FORTY RW GRAB C HAGELBERG R HAYWOOD S HILGART J JOST B KASEMANN M KNOBLOCH J LACOURT A LANCON E LEHRAUS I LOHSE T LUSIANI, Alberto MARCHIORO A MARTINEZ M MATO P MENARY S MEYER T MINTEN A MIOTTO A MIQUEL R MOSER HG NASH J PALAZZI P RANJARD F REDLINGER G ROLANDI, LUIGI ROTH A ROTHBERG J ROTSCHEIDT H SAICH M SCHLATTER D SCHMELLING M TEJESSY W WACHSMUTH H WASSERBAECH S WIEDENMANN W WITZELING W WOTSCHACK J AJALTOUNI Z BADAUD F BARDADINOTWINOWSKA M BENCHEIKH AM ELFELLOUS R FALVARD A GAY P GUICHENEY C HENRARD P JOUSSET J MICHEL B MONTRET JC PALLIN D PERRET P PRORIOL J PRULHIERE F STIMPFL G HANSEN JD HANSEN JR HANSEN PH MOLLERUD R NILSSON BS EFTHYMIOPOULOS I SIMOPOULOU E VAYAKI A BADIER J BLONDEL A BONNEAUD G BRIENT JC FOUQUE G GAMESS A HARVEY J ORTEU S ROSOWSKY A ROUGE A RUMPF M TANAKA R VIDEAU H CANDLIN DJ VEITCH E MONETA L PARRINI G CORDEN M GEORGIOPOULOS C IKEDA M LANNUTTI J LEVINTHAL D MERMIKIDES M SAWYER L ANTONELLI A BALDINI R BENCIVENNI G BOLOGNA G CAMPANA P CAPON G CERUTTI F CHIARELLA V DETTORREPIAZZOLI B FELICI G LAURELLI P MANNOCCHI G MURTAS F MURTAS GP PASSALACQUA L PEPEALTARELLI M PICCHI P ZOGRAFOU P ALTOON B BOYLE O COLRAIN P HALLEY AW TENHAVE I LYNCH JG MAITLAND W MORTON WT RAINE C SCARR JM SMITH K THOMPSON AS TURNBULL RM BRANDL B BRAUN O GEIGES R GEWENIGER C HANKE P HEPP V KLUGE EE MAUMARY Y PUTZER A RENSCH B STAHL A TITTEL K WUNSCH M BELK AT BEUSELINCK R BINNIE DM CAMERON W CATTANEO M DORNAN PJ DUGEAY S GREENE AM HASSARD JF LIESKE NM PATTON SJ PAYNE DG PHILLIPS MJ SEDGBEER JK TAYLOR G TOMALIN IR WRIGHT AG GIRTLER P KUHN D RUDOLPH G BOWDERY CK BRODBECK TJ FINCH AJ FOSTER F HUGHES G KEEMER NR NUTTALL M PATEL A ROWLINGSON BS SLOAN T SNOW SW WHELAN EP BARCZEWSKI T KLEINKNECHT K RAAB J RENK B ROEHN S SANDER HG SCHMIDT H STEEG F WALTHER SM WOLF B AUBERT JJ BENCHOUK C BERNARD V BONISSENT A CARR J COYLE P DRINKARD J ETIENNE F PAPALEXIOU S PAYRE P PIETRZYK B QIAN Z ROUSSEAU D SCHWEMLING P TALBY M ADLUNG S BECKER H BLUM W BROWN D CATTANEO P COWAN G DEHNING B DIETL H DYDAK F FERNANDEZBOSMAN M HANSLKOZANECKA T JAHN A KOZANECKI W LANGE E LAUBER J LUTJENS G LUTZ G MANNER W PAN Y RICHTER R SCHRODER J SCHWARZ AS SETTLES R STIERLIN U STDENIS R TAKASHIMA M THOMAS J WOLF G BERTIN V BOUCROT J CALLOT O CHEN X CORDIER A DAVIER M GRIVAZ JF GROS MH HEUSSE P JANOT P KIM DW LEDIBERDER F LEFRANCOIS J LUTZ AM VEILLET JJ VIDEAU I ZHANG Z ZOMER F ABBANEO D AMENDOLIA SR BAGLIESI G BATIGNANI G BOSISIO L BOTTIGLI U BRADASCHIA C CARPINELLI M CIOCCI MA DELLORSO R FERRANTE I FIDECARO F FOA L FOCARDI E FORTI F GATTO C GIASSI A GIORGI MA LIGABUE, FRANCO MANNELLI EB MARROCCHESI PS MESSINEO A PALLA F SANGUINETTI G STEINBERGER J TENCHINI R TONELLI G TRIGGIANI G VANNINI C VENTURI A VERDINI PG WALSH J CARTER JM GREEN MG MARCH PV MEDCALF T QUAZI IS STRONG JA WEST LR WILDISH T BOTTERILL DR CLIFFT RW EDGECOCK TR EDWARDS M FISHER SM JONES TJ NORTON PR SALMON DP THOMPSON JC BLOCHDEVAUX B COLAS P LOCCI E LOUCATOS S MONNIER E PEREZ P PERLAS JA PERRIER F RANDER J RENARDY JF ROUSSARIE A SCHULLER JP SCHWINDLING J VALLAGE B ASHMAN JG BOOTH CN BUTTAR C CARNEY RE CARTWRIGHT S COMBLEY F DOGRU M HATFIELD F MARTIN J PARKER D REEVES P THOMPSON LF BARBERIO E BRANDT S GRUPEN C MEINHARD H MIRABITO L SCHAFER U SEYWERD H GANIS G GIANNINI G GOBBO B RAGUSA F STIEGLER U BELLANTONI L CINABRO D CONWAY JS COWEN DF FENG Z FERGUSON DPS GAO YS GRAHL J HARTON JL JARED RC JOHNSON RP LECLAIRE BW LISHKA C PAN YB PATER JR SAADI Y SHARMA V SHI ZH TANG YH WALSH AM WEAR JA WEBER FV WHITNEY MH WU SL ZOBERNIG G RI Perrier Frederic/A 5953 2011 ANTONELLI ANTONELLA/C 6238 2011 Buttar Craig/D 3706 2011 Stahl Achim/E 8846 2011 S.t. Denis Richard/C 8997 2012 Forti Francesco/H 3035 2011 Ferrante Isidoro/F 1017 2012 mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	1991
Rivista:	PHYSICS LETTERS. SECTION B
Handle:	http://hdl.handle.net/11384/6822
Appare nelle tipologie:	1.1 Articolo in rivista

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