# Measurement of the kT Distribution of Particles in Jets Produced in pp̅ Collisions at √s=1.96  TeV

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http://hdl.handle.net/10138/24409

#### Citation

Aaltonen , T , Mehtälä , P , Orava , R , Mäki , T , Saarikko , H , Österberg , K & CDF Collaboration 2009 , ' Measurement of the kT Distribution of Particles in Jets Produced in pp̅ Collisions at √s=1.96  TeV ' , Physical Review Letters , vol. 102 , no. 23 , pp. 232002 . https://doi.org/10.1103/PhysRevLett.102.232002

 Title: Measurement of the kT Distribution of Particles in Jets Produced in pp̅ Collisions at √s=1.96  TeV Alternative title: Measurement of the kT Distribution of Particles in Jets Produced in ppbar Collisions at s**(1/2)=1.96$-TeV Author: Aaltonen, T.; Mehtälä, Petteri; Orava, Risto; Mäki, Tuula; Saarikko, Heimo; Österberg, Kenneth; CDF Collaboration Contributor organization: Helsinki Institute of PhysicsDepartment of PhysicsParticle Physics and Astrophysics Date: 2009 Language: eng Number of pages: 8 Belongs to series: Physical Review Letters ISSN: 0031-9007 DOI: https://doi.org/10.1103/PhysRevLett.102.232002 URI: http://hdl.handle.net/10138/24409 Abstract: We present a measurement of the transverse momentum with respect to the jet axis ($k_{T}$) of particles in jets produced in$p\bar p$collisions at$\sqrt{s}=1.96$TeV. Results are obtained for charged particles within a cone of opening angle 0.5 radians around the jet axis in events with dijet invariant masses between 66 and 737 GeV/c$^{2}\$. The experimental data are compared to theoretical predictions obtained for fragmentation partons within the framework of resummed perturbative QCD using the modified leading log and next-to-modified leading log approximations. The comparison shows that trends in data are successfully described by the theoretical predictions, indicating that the perturbative QCD stage of jet fragmentation is dominant in shaping basic jet characteristics.We present a measurement of the transverse momentum with respect to the jet axis (kt) of particles in jets produced in pp̅ collisions at √s=1.96  TeV. Results are obtained for charged particles in a cone of 0.5 radians around the jet axis in events with dijet invariant masses between 66 and 737  GeV/c2. The experimental data are compared to theoretical predictions obtained for fragmentation partons within the framework of resummed perturbative QCD using the modified leading log and next-to-modified leading log approximations. The comparison shows that trends in data are successfully described by the theoretical predictions, indicating that the perturbative QCD stage of jet fragmentation is dominant in shaping basic jet characteristics. Description: Submitted to PRL Subject: 114 Physical sciences hep-ex Peer reviewed: Yes Usage restriction: restrictedAccess
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