MEASUREMENT OF QCD JET BROADENING IN PPBAR COLLISIONS AT SQUARE-ROOT-S = 1.8 TEV

被引：13

作者：

ABE, F

机构：

[1] Argonne National Laboratory, Argonne

[2] Brandeis University, Waltham

[3] University of Chicago, Chicago

[4] Fermi National Accelerator Laboratory, Batavia

[5] Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, Frascate

[6] Harvard University, Cambridge

[7] University of Illinois, Urbana

[8] National Laboratory for High Energy Physics (KEK) Tsukuba-gun

[9] Lawrence Berkeley Laboratory, Berkeley

[10] University of Pennsylvania, Philadelphia

[11] Istituto Nazionale di Fisica, Nucleare University, Scuola Normale Superiore of Pisa

[12] Purdue University, West Lafayette

[13] Rockefeller University, New York

[14] Rutgers University, Piscataway

[15] Texas AandM University, College Station

[16] University of Tsukuba

[17] University of Wisconsin, Madison

来源：

PHYSICAL REVIEW D | 1991年 / 44卷 / 03期

关键词：

D O I：

10.1103/PhysRevD.44.601

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A measurement of the QCD jet-broadening parameter <Q(T)> is described for high-E(T) jet data in the central calorimeter of the Collider Detector at Fermilab. As an alternate approach to clustering analysis, this method involves the use of a global event parameter which is free from the ambiguities associated with the definition and separation of individual clusters. The parameter Q(T) is defined as the scalar sum of the transverse momentum perpendicular to the transverse thrust axis. Parton-level QCD predictions are made for <Q(T)> as a function of E(T), the total transverse energy in the events, and suggest that a measurement would show a dependence on the running of the strong coupling constant alpha-s. Comparisons are made to first-order QCD parton-level calculations, as well as to fully evolved and hadronized leading-log simulations. The data are well described by the QCD predictions.

引用

页码：601 / 616

页数：16

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