Buchcover von Determination of alpha_s via the Differential 2-Jet-Rate
Buchtitel:

Determination of alpha_s via the Differential 2-Jet-Rate

with ATLAS at LHC

Südwestdeutscher Verlag für Hochschulschriften (01.09.2011 )

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ISBN-13:

978-3-8381-2861-0

ISBN-10:
3838128613
EAN:
9783838128610
Buchsprache:
Deutsch
Klappentext:
The first determination of the strong coupling constant alpha_s via the differential 2-jet-rate in pp collisions at the LHC (at a center-of-mass-energy of 7 TeV) is presented. Data gathered by the ATLAS experiment are fitted by next-to-leading order (NLO) perturbative QCD predictions from calculations with the program NLOJET++. As an observable, the jet-flip-parameter from 3 to 2 reconstructed jets is investigated, using the infrared and collinear safe kT jet algorithm in the exclusive reconstruction mode. The jet-flip-parameters from real data are compared to simulated data from Monte Carlo generators. For the determination of alpha_s, real data have been corrected for the jet-energy-scale, whereas the calculations from NLOJET++ have been corrected for the influence of hadronization effects as well as the impact of the Underlying Event by applying bin-by-bin corrections. The fit between real data and the calculations from NLOJET++ yields a value of alpha_s(M_Z) = 0.120±0.001(stat.)±0.005(syst.), which is in very good agreement with the current world average.
Verlag:
Südwestdeutscher Verlag für Hochschulschriften
Webseite:
https://www.svh-verlag.de
von (Autor):
Markus Lichtnecker
Seitenanzahl:
128
Veröffentlicht am:
01.09.2011
Lagerbestand:
Lieferbar
Kategorie:
Atomphysik, Kernphysik
Preis:
69,90 €
Stichworte:
strong coupling constant, alphas, alpha_s, starke Kopplungskonstante, Teilchenphysik, CERN, LHC, Atlas, ATLAS-Experiment, paticle physics, QCD, 2-jet-rate, 3-jet-rate, ATLAS

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