Charged-particle multiplicity pp collisions at square root of (s) = 1.8 TeV. T Affolder , H Akimoto , A Akopian , M G Albrow , P Amaral , D Amidei , K Anikeev , J Antos , G Apollinari , T Arisawa , A Artikov , T Asakawa , W Ashmanskas , F Azfar , P Azzi-Bacchetta , N Bacchetta , H Bachacou , S Bailey , P de Barbaro , A Barbaro-Galtieri , V E Barnes , B A Barnett , S Baroiant , M Barone , G Bauer , F Bedeschi , S Belforte , W H Bell , G Bellettini , J Bellinger , D Benjamin , J Bensinger , A Beretvas , J P Berge , J Berryhill , A Bhatti , M Binkley , D Bisello , M Bishai , R E Blair , C Blocker , K Bloom , B Blumenfeld , S R Blusk , A Bocci , A Bodek , W Bokhari , G Bolla , Y Bonushkin , D Bortoletto , J Boudreau , A Brandl , S van Brink , C Bromberg , M Brozovic , E Brubaker , N Bruner , E Buckley-Geer , J Budagov , H S Budd , K Burkett , G Busetto , A Byon-Wagner , K L Byrum , S Cabrera , P Calafiura , M Campbell , W Carithers , J Carlson , D Carlsmith , W Caskey , A Castro , D Cauz , A Cerri , A W Chan , P S Chang , P T Chang , J Chapman , C Chen , Y C Chen , 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Popovic , F Prokoshin , J Proudfoot , F Ptohos , O Pukhov , G Punzi , A Rakitine , F Ratnikov , D Reher , A Reichold , A Ribon , W Riegler , F Rimondi , L Ristori , M Riveline , W J Robertson , A Robinson , T Rodrigo , S Rolli , L Rosenson , R Roser , R Rossin , A Roy , A Ruiz , A Safonov , R St Denis , W K Sakumoto , D Saltzberg , C Sanchez , A Sansoni , L Santi , H Sato , P Savard , P Schlabach , E E Schmidt , M P Schmidt , M Schmitt , L Scodellaro , A Scott , A Scribano , S Segler , S Seidel , Y Seiya , A Semenov , F Semeria , T Shah , M D Shapiro , P F Shepard , T Shibayama , M Shimojima , M Shochet , A Sidoti , J Siegrist , A Sill , P Sinervo , P Singh , A J Slaughter , K Sliwa , C Smith , F D Snider , A Solodsky , J Spalding , T Speer , P Sphicas , F Spinella , M Spiropulu , L Spiegel , J Steele , A Stefanini , J Strologas , F Strumia , D Stuart , K Sumorok , T Suzuki , T Takano , R Takashima , K Takikawa , P Tamburello , M Tanaka , B Tannenbaum , M Tecchio , R Tesarek , P K Teng , K Terashi , S Tether , A S Thompson , R Thurman-Keup , P Tipton , S Tkaczyk , D Toback , K Tollefson , A Tollestrup , D Tonelli , H Toyoda , W Trischuk , J F de Troconiz , J Tseng , N Turini , F Ukegawa , T Vaiciulis , J Valls , S Vejcik , G Velev , G Veramendi , R Vidal , I Vila , R Vilar , I Volobouev , M von Der Mey , D Vucinic , R G Wagner , R L Wagner , N B Wallace , Z Wan , C Wang , M J Wang , B Ward , S Waschke , T Watanabe , D Waters , T Watts , R Webb , H Wenzel , W C Wester , A B Wicklund , E Wicklund , T Wilkes , H H Williams , P Wilson , B L Winer , D Winn , S Wolbers , D Wolinski , J Wolinski , S Wolinski , S Worm , X Wu , J Wyss , W Yao , G P Yeh , P Yeh , J Yoh , C Yosef , T Yoshida , I Yu , S Yu , Z Yu , A Zanetti , F Zetti , S Zucchelli Physical review letters（2001）
摘要
We report on a measurement of the mean charged-particle multiplicity of jets in dijet events with dijet masses in the range 80-630 GeV/c(2), produced at the Tevatron in pp collisions with square root (s) = 1.8 TeV and recorded by the Collider Detector at Fermilab. The data are fit to perturbative-QCD calculations carried out in the framework of the modified leading log approximation and the hypothesis of local parton-hadron duality. The fit yields values for two parameters in that framework: the ratio of parton multiplicities in gluon and quark jets, r identical withN(g-jet)(partons)/N(q-jet)(partons) = 1.7+/-0.3, and the ratio of the number of charged hadrons to the number of partons in a jet, K(charged)(LPHD) identical with N(charged)(hadrons)/N(partons) = 0.57+/-0.11.
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