Measurement Of Inclusive Jet Cross Sections In Z U2192 E E Jets Production In P Bar P Collisions At U221a S
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Measurement of Inclusive Jet Cross Sections in Z/?*({u2192}e+e-) + Jets Production in P$\bar{p}$ Collisions at {u221A}s
This Ph.D. thesis presents the measurement of inclusive jet cross sections in Z/?*→ e+e- events using 1.7 fb-1 of data collected by the upgraded CDF detector during the Run II of the Tevatron. The Midpoint cone algorithm is used to search for jets in the events after identifying the presence of a Z/?* boson through the reconstruction of its decay products. The measurements are compared to next-to-LO (NLO) pQCD predictions for events with one and two jets in the final state. The perturbative predictions are corrected for the contributions of non-perturbative processes, like the underlying event and the fragmentation of the partons into jets of hadrons. These processes are not described by perturbation theory and must be estimated from phenomenological models. In this thesis, a number of measurements are performed to test different models of underlying event and hadronization implemented in LO plus parton shower Monte Carlo generator programs. Chapter 2 is devoted to the description of the theory of strong interactions and jet phenomenology at hadron colliders. Chapter 3 contains the description of the Tevatron collider and the CDF detector. The analysis is described in detail in Chapter 4. Chapter 5 shows the measurement of those observables sensitive to non-perturbative effects compared to the predictions from several Monte Carlo programs. Chapter 6 discusses the final results and the comparison with theoretical expectations. Finally, Chapter 7 is devoted to the conclusions.
Measurement of the Z/?* ({u2192} E+e-) + {u2265} N Jet Production Cross Sections in P$\bar{p}$ Collisions at {u221A}s
A study of events with Z/?* bosons and hadronic jets produced at the Tevatron in p$ar{p}$ collisions at a center of mass energy of 1.96 TeV is presented. The data consist of approximately 14,000 Z/?* → e+e- decay candidates from 343 pb-1 of integrated luminosity collected with the D0 detector. Cross sections and jet production properties have been measured for Z/?* + ≥ 0 to 5 jet events. This measurement represents a significant improvement over previous measurements at the Tevatron, and it is the first at this center of mass energy with the D0 detector. The results are in good agreement with QCD predictions.
Measurement of the Inclusive Jet Cross Section Using the K(T) Algorithm in P Anti-p Collisions at S**1/2
The authors report on a measurement of the inclusive jet production cross section in p{bar p} collisions at √s = 1.96 TeV using data collected with the upgraded Collider Detector at Fermilab in Run II (CDF II) corresponding to an integrated luminosity of 385 pb−1. Jets are reconstructed using the k{sub T} algorithm. The measurement is carried out for jets with rapidity 0.1