OpenAccess

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2017-10-20
12:14
OpenAccess [PUBDB-2017-11466] Preprint/Report
; ; ; et al
Femtosecond x-ray diffraction from an aerosolized beam of protein nanocrystals
[arXiv:1702.04014] ddc:530
We demonstrate near-atomic-resolution Bragg diffraction from aerosolized single granulovirus crystals using an x-ray free-electron laser. The form of the aerosol injector is nearly identical to conventional liquid-microjet nozzles, but the x-ray-scattering background is reduced by several orders of magnitude by the use of helium carrier gas rather than liquid. [...]
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2017-10-20
11:43
OpenAccess [PUBDB-2017-11465] Report/Internal Report

Quark Fragmentation Functions in Hadronic and Deep Inelastic Single Particle Inclusive Processes
[DESY-74-010]
In the framework of Feynman's quark--parton model for inclusive electroproduction and quark model of Ezawa, Maharana and Miyazawa for hadronic inclusive processes, relations between invariant cross sections for electroproduction of pions and purely hadronic production of pions in the beam fragmentation regions are derived. They are satisfied by data. [...]
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2017-10-20
11:40
OpenAccess [PUBDB-2017-11464] Report/Internal Report

Eikonal expansion of the scattering amplitude in impact parameter representation
[DESY-74-009]
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2017-10-20
11:38
OpenAccess [PUBDB-2017-11463] Report/Internal Report

The Significance of Conformal Inversion in Quantum Field Theory
[DESY-74-8]
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2017-10-20
11:35
OpenAccess [PUBDB-2017-11462] Report/Internal Report
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Electromagnetic Properties of Hadrons in a Relativistic Quark Model
[DESY-74-7]
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2017-10-20
11:24
OpenAccess [PUBDB-2017-11461] Report/Internal Report
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Absorption corrections in a mueller-regge analysis of inclusive photo- and electroproduction
[DESY-74-006] ddc:530
We discuss the photon fragmentation region of inclusive pion photo- and electroproduction in terms of a helicity dependent Mueller-Regge model, in which cut contributions are taken into accout. It is shown that the inadequacies of a pure Regge pole expansion can be corrected if certain types of Regge cut contributions are included. [...]
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2017-10-20
11:16
OpenAccess [PUBDB-2017-11458] Report/Dissertation / PhD Thesis

Asymptotic behaviour at exceptional momenta
[DESY-74-004]

[S.l.] : Italian Physical Society, (1975) [10.1007/BF02900512] = Universität Hamburg, Diss., 1974  GO
ddc:530
We develop a method for investigating the asymptotic behaviour of vertex functions at certain Minkowskian exceptional momenta. It is a direct generalization of earlier treatments of Euclidean exceptional momenta. [...]
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2017-10-20
10:48
OpenAccess [PUBDB-2017-11457] Report/Internal Report

Alternatives to the veneziano amplitude
[DESY-74-003]
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2017-10-20
10:45
OpenAccess [PUBDB-2017-11456] Report/Internal Report
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Covariant Perturbation Expansion in Chiral Theories with Pions and Nucleons
[DESY-74-002] ddc:530
A covariant perturbation scheme is developed to give a coordinate independent perturbation expansion of the chiral invariant pion model with nucleons. On the mass shell the covariant approach is shown to be equivalent to the standard perturbation theory..
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2017-10-18
11:07
OpenAccess [PUBDB-2017-11440] Report/Journal Article
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Characterizing and optimizing a laser-desorption molecular beam source
[arXiv:1706.04083] ddc:540
The design and characterization of a new laser-desorption molecular beam source, tailored for use in x-ray free-electron laser and ultrashort-pulse laser imaging experiments, is presented. It consists of a single mechanical unit containing all source components, including the molecular-beam valve, the sample, and the fiber-coupled desorption laser, which is movable in five axes, as required for experiments at central facilities. [...]
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