Mathematics

Recent Findings in Physics Described by Researchers from University of Freiburg

  2011 JUN 28 - (VerticalNews.com) -- "Jet shapes have been measured in inclusive jet production in proton-proton collisions at root s = 7 TeV using 3 pb(-1) of data recorded by the ATLAS experiment at the LHC. Jets are reconstructed using the anti-k(t) algorithm with transverse momentum 30 GeV < p(T) < 600 GeV and rapidity in the region vertical bar y vertical bar < 2.8," scientists writing in the journal Physical Review D report.

  "The data are corrected for detector effects and compared to several leading-order QCD matrix elements plus parton shower Monte Carlo predictions, including different sets of parameters tuned to model fragmentation processes and underlying event contributions in the final state. The measured jets become narrower with increasing jet transverse momentum and the jet shapes present a moderate jet rapidity dependence. Within QCD, the data test a variety of perturbative and nonperturbative effects. In particular, the data show sensitivity to the details of the parton shower, fragmentation, and underlying event models in the Monte Carlo generators," wrote G. Aad and colleagues, University of Freiburg.

  The researchers concluded: "For an appropriate choice of the parameters used in these models, the data are well described."

  Aad and colleagues published their study in Physical Review D (Study of jet shapes in inclusive jet production in pp collisions at root s=7 TeV using the ATLAS detector. Physical Review D, 2011;83(5):2003).

  Additional information can be obtained by contacting G. Aad, University of Freiburg, Fak Math & Physics, Hermann Herder Str 3, D-79104 Freiburg, GERMANY.

  The publisher of the journal Physical Review D can be contacted at: American Physical Society, One Physics Ellipse, College Pk, MD 20740-3844, USA.

  Keywords: City:Freiburg, Country:Germany, Region:Europe, Physics

  This article was prepared by VerticalNews Mathematics editors from staff and other reports. Copyright 2011, VerticalNews Mathematics via VerticalNews.com.