Measurement of Dijet Angular Distributions and Search for Quark Compositeness in pp Collisions at root s=7 TeV

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/52998

Title:	Measurement of Dijet Angular Distributions and Search for Quark Compositeness in pp Collisions at root s=7 TeV
Authors:	Khachatryan,V;Sirunyan,AM;Tumasyan,A;Adam,W;Bergauer,T;Dragicevic,M;Ero,J;Friedl,M;Fruhwirth,R;Ghete,VM;Hammer,J;...etc.
Contributors:	物理學系
Keywords:	COLLIDER;DETECTOR;PHYSICS;LIMIT
Date:	2011
Issue Date:	2012-06-11 10:53:25 (UTC+8)
Publisher:	國立中央大學
Abstract:	Dijet angular distributions are measured over a wide range of dijet invariant masses in pp collisions at root s = 7 TeV, at the CERN LHC. The event sample, recorded with the CMS detector, corresponds to an integrated luminosity of 36 pb(-1). The data are found to be in good agreement with the predictions of perturbative QCD, and yield no evidence of quark compositeness. With a modified frequentist approach, a lower limit on the contact interaction scale for left-handed quarks of Lambda(+) = 5.6 TeV (Lambda(-) = 6.7 TeV) for destructive (constructive) interference is obtained at the 95% confidence level.
Relation:	PHYSICAL REVIEW LETTERS
Appears in Collections:	[Department of Physics] journal & Dissertation

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