The Azimuthal Decorrelation of Jets Widely Separated in Rapidity as a Test of the BFKL Kernel PDF Download
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Author: Agustín Sabio Vera
Publisher:
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Languages : en
Pages : 21
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Author: Agustín Sabio Vera
Publisher:
ISBN:
Category :
Languages : en
Pages : 21
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Author: Soon Yung Jun
Publisher:
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Category :
Languages : en
Pages :
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We study the azimuthal decorrelation between jets with pseudorapidity separation up to six units. The data were accumulated using the DO detector during the 1994-1995 collider run of the Fermilab Tevatron at $\sqrt{s} = 1.8$ TeV. The data are compared to two parton shower Monte Carlos (HERWIG and PYTHIA) where the leading logarithmic terms are resummed to all orders in $\alpha\sb{s}$, and an analytical prediction using the leading logarithmic BFKL resummation. The final state jets as predicted by parton showering Monte Carlo describes the data well over the entire pseudorapidity range studied. The prediction based on the leading logarithmic BFKL resummation shows too much decorrelation as the rapidity interval increases.
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Languages : en
Pages : 4
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We present preliminary results from an analysis of the azimuthal decorrelation of dijet events as a function of their separation in pseudorapidity using the data collected during the 1994-1995 collider run. These results are compared to a parton shower Monte Carlo (HERWIG) and a theoretical prediction using BFKL resummation.
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Languages : en
Pages : 11
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We study the azimuthal decorrelation between jets with pseudorapidity separation up to six units. The data were accumulated using the D0 detector during the 1994-1995 collider run of the Fermilab Tevatron at (square root)s = 1.8 TeV. The data are compared to two parton shower Monte Carlos (HERWIG and PYTHIA) and an analytical prediction using the leading logarithmic BFKL resummation. The final state jets as predicted by the parton showering Monte Carlos describe the data over the entire pseudorapidity range studied. The prediction based on the leading logarithmic BFKL resummation shows more decorrelation than the data as the rapidity interval increases.
Author:
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Languages : en
Pages :
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The decorrelation in the azimuthal angle between the most forward and the most backward jets (Mueller-Navelet jets) is measured in data collected in pp collisions with the CMS detector at the LHC at $\sqrt{s} =$ 7 TeV. The measurement is presented in the form of distributions of azimuthal-angle differences, $\Delta\phi$, between the Mueller-Navelet jets, the average cosines of $(\pi-\Delta\phi)$, $2(\pi-\Delta\phi)$, and $3(\pi-\Delta\phi)$, and ratios of these cosines. The jets are required to have transverse momenta, $p_{\mathrm{T}}$, in excess of 35 GeV and rapidities, $
Author: Joachim Bartels
Publisher: World Scientific
ISBN: 9811231133
Category : Science
Languages : en
Pages : 574
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This book has been designed to honor Lev Nikolaevich Lipatov, as a person and as one of the leading scientists in theoretical high energy physics.The book begins with three articles on Lev as a person, written endearingly by family members, a very close friend and Physics professor, Eugene Levin, and another outstanding scientist, Alfred Mueller. The book further collects 18 articles by several scientists who closely knew and/or collaborated with Lev.With an overarching range over various subfields, the book summarizes parts of Lev's achievements, presents new results which are based upon Lev's work, and paints an outlook on possible future developments. Lev's theoretical work has had an influential impact on phenomenology and experimental high energy physics; befittingly, this collection also includes several articles on these experimental aspects.
Author:
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Category :
Languages : en
Pages :
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Author:
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Languages : en
Pages :
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Experimental results on the measurement of the azimuthal decorrelation between jets with pseudorapidity separation up to five units are presented. The data were taken at the Fermi National Accelerator Laboratory during the 1992-1993 collider run with the D[null] detector using[ital p[anti p]] collisions at center-of-mass energy[radical][ital s]= 1.8 TeV. These results are compared to next-to-leading order (NLO) QCD predictions and to two leading-log approximations (LLA) where the leading terms are resummed to all orders in[alpha][sub s]. The final state jets as predicted by NLO QCD show less azimuthal decorrelation than the data. The parton showering LLA Monte Carlo HERWIG describes the data well; an analytical LLA calculation based on Balitsky-Faclin-Kuraev-Lipatov resummation predicts more decorrelation than is present in the data.
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Category :
Languages : en
Pages : 109
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In a collision experiment involving highly energetic particles such as hadrons, processes at high momentum transfers can provide information useful for many studies involving Quantum Chromodynamics (QCD). One way of analyzing these interactions is through angular distributions. In hadron-hadron collisions, the angular distribution between the two leading jets with the largest transverse momentum (pT) is affected by the production of additional jets. While soft radiation causes small differences in the azimuthal angular distribution of the two leading jets produced in a collision event, additional hard jets produced in the event have more pronounced influence on the distribution of the two leading jets produced in the collision. Thus, the dijet azimuthal angular distribution can serve as a variable that can be used to study the transition from soft to hard QCD processes in a collision event. This dissertation presents a triple-differential study involving the azimuthal angular distribution and the jet transverse momenta, and jet rapidities of the first two leading jets. The data used for this research are obtained from proton-antiproton (p$\bar{p}$) collisions occurring at a center of mass energy of 1.96TeV, using the DØ detector in Run II of the Tevatron Collider at the Fermi National Accelerator Laboratory (FNAL) in Illinois, USA. Comparisons are made to perturbative QCD (pQCD) predictions at next-to-leading order (NLO).
Author:
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Category :
Languages : en
Pages : 9
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We present results on measurements of jet shapes and jet azimuthal decorrelation from {bar p}P collisions at (square root)s = 1.8 TeV using data collected during the 1992-1993 run of the Fermilab Tevatron. Jets are seen to narrow both with increasing Awe {sub TTY} and increasing rapidity. While HERWIG, a puritan shower Monte Carlo, predicts slightly narrower jets, it describes the trend of the data well; NO CD described qualitative features of the data but is sensitive to both renormalization scale and jet definitions. Jet azimuthal decorrelation has been measured out to five units of pseudorapidity. While next-to-leading order CD and a leading-log approximation based on BFKL resummation fail to reproduce the effect, HERWIG describes the data well.
