Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 938

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Author: Fonds national de la recherche scientifique (Belgium)
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 320

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Author: Nathan L. Hall
Publisher: Springer
ISBN: 3319202219
Category : Science
Languages : en
Pages : 127

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Book Description
This thesis examines the γZ box contribution to the weak charge of the proton. Here, by combining recent parity-violating electron-deuteron scattering data with our current understanding of parton distribution functions, the author shows that one can limit this model dependence. The resulting construction is a robust model of the γγ and γZ structure functions that can also be used to study a variety of low-energy phenomena. Two such cases are discussed in this work, namely, the nucleon’s electromagnetic polarizabilities and quark-hadron duality. By using phenomenological information to constrain the input structure functions, this important but previously poorly understood radiative correction is determined at the kinematics of the parity-violating experiment, QWEAK, to a degree of precision more than twice that of the previous best estimate. A detailed investigation into available parametrizations of the electromagnetic and interference cross-sections indicates that earlier analyses suffered from the inability to correctly quantify their model dependence.

Author: Fonds national de la recherche scientifique (Belgium)
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 616

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Author: Sebastian Klein
Publisher: Springer Science & Business Media
ISBN: 3642232868
Category : Science
Languages : en
Pages : 246

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The production of heavy quarks in high-energy experiments offers a rich field to study, both experimentally and theoretically. Due to the additional quark mass, the description of these processes in the framework of perturbative QCD is much more demanding than it is for those involving only massless partons. In the last two decades, a large amount of precision data has been collected by the deep inelastic HERA experiment. In order to make full use of these data, a more precise theoretical description of charm quark production in deep inelastic scattering is needed. This work deals with the first calculation of fixed moments of the NNLO heavy flavor corrections to the proton structure function F2 in the limit of a small charm-quark mass. The correct treatment of these terms will allow not only a more precise analysis of the HERA data, but starting from there also a more precise determination of the parton distribution functions and the strong coupling constant, which is an essential input for LHC physics. The complexity of this calculation requires the application and development of technical and mathematical methods, which are also explained here in detail.

Author:
Publisher:
ISBN:
Category : Union catalogs
Languages : en
Pages : 610

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Author: Martha C. Zipf
Publisher:
ISBN:
Category : Hadron spectroscopy
Languages : en
Pages : 452

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Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1606

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Author: Xerox University Microfilms
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 960

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Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 964

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