MEASUREMENT OF THE CHARGED MULTIPLICITIES IN B-QUARK, C-QUARK AND LIGHT-QUARK EVENTS FROM Z(O) DECAYS

Authors
ABE K ABE K ABT I AKAGI T ALLEN NJ ASH WW ASTON D BAIRD KG BALTAY C BAND HR BARAKAT MB BARANKO G BARDON O BARKLOW T BAZARKO AO BENDAVID R BENVENUTI AC BILEI GM BISELLO D BLAYLOCK G BOGART JR BOLEN B BOLTON T BOWER GR BRAU JE BREIDENBACH M BUGG WM BURKE D BURNETT TH BURROWS PN BUSZA W CALCATERRA A CALDWELL DO CALLOWAY D CAMANZI B CARPINELLI M CASSELL R CASTALDI R CASTRO A CAVALLISFORZA M CHOU A CHURCH E COHN HO COLLER JA COOK V COTTON R COWAN RF COYNE DG CRAWFORD G DOLIVEIRA A DAMERELL CJS DAOUDI M DESANGRO R DELLORSO R DERVAN PJ DIMA M DONG DN DU PYC DUBOIS R EISENSTEIN BI ELIA R ETZION E FALCIAI D FAN C FERO MJ FREY R FURUNO K GILLMAN T GLADDING G GONZALEZ S HALLEWELL GD HART EL HARTON JL HASAN A HASEGAWA Y HASUKO K HEDGES SJ HERTZBACH SS HILDRETH MD HUBER J HUFFER ME HUGHES EW HWANG H IWASAKI Y JACKSON DJ JACQUES P JAROS JA JOHNSON AS JOHNSON JR JOHNSON RA JUNK T KAJIKAWA R KALELKAR M KANG HJ KARLINER I KAWAHARA H KENDALL HW KIM YD KING ME KING R KOFLER RR KRISHNA NM KROEGER RS LABS JF LANGSTON M LATH A LAUBER JA LEITH DWGS LIA V LIU MX LIU X LORETI M LU A LYNCH HL MA J MANCINELLI G MANLY S MANTOVANI G MARKIEWICZ TW MARUYAMA T MASUDA H MAZZUCATO E MCKEMEY AK MEADOWS BT MESSNER R MOCKETT PM MOFFEIT KC MOORE TB MULLER D NAGAMINE T NARITA S NAUENBERG U NEAL H NUSSBAUM M OHNISHI Y OSBORNE LS PANVINI RS PARK H PAVEL TJ PERUZZI I PICCOLO M PIEMONTESE L PIERONI E PITTS KT PLANO RJ PREPOST R PRESCOTT CY PUNKAR GD QUIGLEY J RATCLIFF BN REEVES TW REIDY J RENSING PE ROCHESTER LS ROWSON PC RUSSELL JJ SAXTON OH SCHALK T SCHINDLER RH SCHUMM BA SEN S SERBO VV SHAEVITZ MH SHANK JT SHAPIRO G SHERDEN DJ SHMAKOV KD SIMOPOULOS C SINEV NB SMITH SR SMY MB SNYDER JA STAMER P STEINER H STEINER R STRAUSS MG SU D SUEKANE F SUGIYAMA A SUZUKI S SWARTZ M SZUMILO A TAKAHASHI T TAYLOR FE TORRENCE E TRANDAFIR AI TURK JD USHER T VAVRA J VANNINI C VELLA E VENUTI JP VERDIER R VERDINI PG WAGNER SR WAITE AP WATTS SJ WEIDEMANN AW WEISS ER WHITAKER JS WHITE SL WICKENS FJ WILLIAMS DA WILLIAMS DC WILLIAMS SH WILLOCQ S WILSON RJ WISNIEWSKI WJ WOODS M WORD GB WYSS J YAMAMOTO RK YAMARTINO JM YANG X YELLIN SJ YOUNG CC YUTA H ZAPALAC G ZDARKO RW ZEITLIN C ZHOU J
Citation
K. Abe et al., MEASUREMENT OF THE CHARGED MULTIPLICITIES IN B-QUARK, C-QUARK AND LIGHT-QUARK EVENTS FROM Z(O) DECAYS, Physics letters. Section B, 386(1-4), 1996, pp. 475-485
Citations number
37
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
386
Issue
1-4
Year of publication
1996
Pages
475 - 485
Database
ISI
SICI code
0370-2693(1996)386:1-4<475:MOTCMI>2.0.ZU;2-U
Abstract
Average charged multiplicities have been measured separately in b, c a nd light quark (u, d, s) events from Z(0) decays measured in the SLD e xperiment. Impact parameters of charged tracks were used to select enr iched samples of b and light quark events, and reconstructed charmed m esons were used to select c quark events. We measured the charged mult iplicities: <(n)over bar (uds)> = 20.21 +/- 0.10(stat.) +/- 0.22(syst. ), <(n)over bar (c)> = 21.28 +/- 0.46(stat.)(-0.36)(+0.41)(syst.) and <(n)over bar (b)> = 23.14 +/- 0.10(stat.)(-0.37)(+0.38)(syst.), from w hich we derived the differences between the total average charged mult iplicities of c or b quark events and light quark events: <Delta(n)ove r bar (c)> = 1.07 +/- 0.47(stat.)(-0.30)(+0.36)(syst.) and <Delta(n)ov er bar (b)> = 2.93 +/- 0.14(stat.)(-0.29)(+0.30)(syst.). We compared t hese measurements with those at lower center-of-mass energies and with perturbative QCD predictions. These combined results are in agreement with the QCD expectations and disfavor the hypothesis of flavor-indep endent fragmentation.