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Author: J.-W. QIU
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
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Book Description
In this talk, I briefly review several models of the heavy quarkonium production at collider energies, and discuss the status of QCD factorization for these production models.
Author: J.-W. QIU
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
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Book Description
In this talk, I briefly review several models of the heavy quarkonium production at collider energies, and discuss the status of QCD factorization for these production models.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
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.
Author: Hua-Sheng Shao
Publisher: Springer
ISBN: 9811016240
Category : Science
Languages : en
Pages : 173
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Book Description
This book focuses on the study of heavy quarkonium production at high-energy colliders as a useful tool to explain both the perturbative and non-perturbative aspects of quantum choromodynamics. It provides the first comprehensive comparison between the theory and recent experiments and clarifies some longstanding puzzles in the heavy quarkonium production mechanism. In addition, it describes in detail a new framework for implementing precise computations of the physical observables in quantum field theories based on recently developed techniques. It can be used to simulate the complicated collider environment of the Large Hadron Collider at the Conseil Européen pour la Recherche Nucléaire (CERN). Its accomplishment implies that the Monte Carlo simulations for high-energy physics experiments have reached the limits of precision. It offers readers a wealth of valuable information on the relevant techniques.
Author: Valentin Knünz
Publisher: Springer
ISBN: 3319499351
Category : Science
Languages : en
Pages : 179
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Book Description
This thesis discusses in detail the measurement of the polarizations of all S-wave vector quarkonium states in LHC proton-proton collisions with the CMS detector. Heavy quarkonium states constitute an ideal laboratory to study non-perturbative effects of quantum chromodynamics and to understand how quarks bind into hadrons. The experimental results are interpreted through an original phenomenological approach, which leads to a coherent picture of quarkonium production cross sections and polarizations within a simple model, dominated by one single color-octet production mechanism. These findings provide new insights into the dynamics of heavy quarkonium production at the LHC, an important step towards a satisfactory understanding of hadron formation within the standard model of particle physics.
Author: J.-W. QIU
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
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Book Description
We briefly review several models of heavy quarkonium production in hadronic collisions, and discuss the status of QCD factorization for these production models.
Author: Thomas Mehen
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Recent measurements of J/{psi} production in e{sup +}e{sup -} colliders pose a challenge to the NRQCD factorization theorem for quarkonium production. Discrepancies between leading order calculations of color-octet contributions and the momentum distribution of J/{psi} observed by Belle and BaBar are resolved by resumming large perturbative and nonperturbative corrections that are enhanced near the kinematic endpoint. The large cross sections for J/{psi} + c + {bar c} and double quarkonium production remain poorly understood. Nonperturbative effects in fixed-target hadroproduction of open charm are also discussed. Large asymmetries in the production of charm mesons and baryons probe nonperturbative corrections to the QCD factorization theorem. A power correction called heavy-quark recombination can economically explain these asymmetries with a few universal parameters.
Author: Jose Emilio F. T. Ribeiro
Publisher: AIP Conference Proceedings (Nu
ISBN:
Category : Science
Languages : en
Pages : 580
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Book Description
This volume features papers presented at the 7th Conference on Quark Confinement and the Hadron Spectrum. It covers the up-to-date research done in the physics of quarks and their role as ultimate constituents of matter. It will be of interest to all theoreticians and experimentalists working in these areas.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: David Blaschke
Publisher: Springer Science & Business Media
ISBN: 9783540219217
Category : Science
Languages : en
Pages : 468
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Book Description
This volume covers the main topics in heavy flavour physics in a comprehensive yet accessible way. The material is presented as a combination of extensive introductory lectures and more typical contributions. This book will benefit postgraduate students and reseachers alike.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
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.
