Heavy quark production in pþ interaction at collider energies PDF Download
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Languages : de
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Author:
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Languages : de
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Languages : en
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The theory of heavy quark production in QCD at collider energies is reviewed. The most important features of the recently published results on higher order corrections to the heavy quark production cross-section are described. The phenomenological consequences of these formulae for bottom and top quark production at Sp/bar p/S and Tevatron energies are presented. 22 refs., 13 figs., 1 tab.
Author: E. M. Levin
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Category :
Languages : en
Pages : 4
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Languages : en
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A review is presented of heavy quark production in /bar p/p, p, and pp interactions at fixed target and collider energies. Calculations of total cross sections are described including contributions through next-to-leading order in QCD perturbation theory. Comparisons with available data on charm and bottom quark production show good agreement for reasonable values of charm and bottom quark masses and other parameters. Open issues in the interpretation of results are summarized. A discussion is presented of signatures, backgrounds, and expected event rates for top quark production. 19 refs., 4 figs.
Author: R. K. Ellis
Publisher: Cambridge University Press
ISBN: 9780521545891
Category : Science
Languages : en
Pages : 462
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A detailed overview of the physics of high-energy colliders emphasising the role of QCD.
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Category :
Languages : en
Pages : 21
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A review is presented of heavy quark production in {bar p}p,?−p, and pp interactions at fixed target and collider energies. Calculations of total cross sections and of single quark inclusive differential cross sections d2?/dk{sub T}dy are described including contributions through next-to-leading order in QCD perturbation theory. Comparisons with available data on charm and bottom quark production show good agreement for reasonable values of the charm and bottom quark masses and other parameters. Predictions and open issues in the interpretation of results are summarized. A brief discussion is presented of signatures, backgrounds, and expected event rates for top quark production. 24 refs., 6 figs.
Author: Christine Marie Monteverdi
Publisher:
ISBN:
Category : Leptons (Nuclear physics)
Languages : en
Pages : 94
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The measurements for the study of heavy-quark production in proton-proton (pp) collisions with ALICE at Large Hadron Collider (LHC) energies are described. Heavy-quarks (charm and beauty) are produced at an early stage of the collision via hard parton scatterings. In ALICE, heavy-quarks are measured in the central barrel (j j
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Languages : en
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We calculate the O([alpha]3s) short-distance, QCD collinear-factorized coefficient functions for all partonic channels that include the production of a heavy quark pair at short distances. Thus, this provides the first power correction to the collinear-factorized inclusive hadronic production of heavy quarkonia at large transverse momentum, pT, including the full leading-order perturbative contributions to the production of heavy quark pairs in all color and spin states employed in NRQCD treatments of this process. We discuss the role of the first power correction in the production rates and the polarizations of heavy quarkonia in high-energy hadronic collisions. The consistency of QCD collinear factorization and nonrelativistic QCD factorization applied to heavy quarkonium production is also discussed.
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Languages : en
Pages : 6
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We present a state-of-the-art compilation of the existing bottom production cross sections in elementary collisions, from fixed-target to collider experiments. We then discuss the theoretical uncertainties on the total and differential bottom cross sections in the FONLL approach. In particular, we show total cross sections and kinematical distributions of the bottom hadrons and their decays: B → e/?X, B → D → e/?, and B → J/?X. After seeing that the calculations give a good description of the existing measurements, we present detailed predictions for the LHC experiments in their specific phase space windows. Recent improvements in heavy quark production theory and experimental measurements at colliders, especially for bottom production, have shown that the perturbative QCD framework seems to work rather well, see Refs. [1, 2]. It is important to continue to validate this theoretical framework and its phenomenological inputs, extracted from other measurements, with new data such as that obtained by the CMS collaboration in pp collisions at √s = 7 TeV. We validate the FONLL approach with lower energy data and also compare the results with preliminary LHC data. By showing good agreement between the calculations and the data, we demonstrate we can confidently extrapolate our results to energies appropriate for heavy-ion measurements. Total cross section calculations using the FONLL approach for pp → B{bar B} show excellent agreement across a wide range of √s at both full phase space and CDF phase space. This provides confidence that extrapolating to LHC energies will also show good agreement. Differential cross section FONLL calculations (d?/dp{sub T} and d?/d?) at 7 TeV have been compared to preliminary CMS results. The agreement is quite striking. In addition, B fraction calculations have been made that also compare well to the CMS data. This should allow us to expect good agreement between further FONLL calculations and other observables.
Author: Jorma Tuominiemi
Publisher:
ISBN: 9789514526848
Category :
Languages : en
Pages : 10
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