# Radiatively generated parton distributions of real and virtual photons

@article{Gluck1999RadiativelyGP,
title={Radiatively generated parton distributions of real and virtual photons},
author={Mary Gluck and Ewald Reya and I. Schienbein},
journal={Physical Review D},
year={1999},
volume={60},
pages={054019}
}
• Published 12 March 1999
• Physics
• Physical Review D
The parton content of real ${(P}^{2}=0)$ and virtual ${(P}^{2}\ensuremath{\ne}0)$ transverse photons $\ensuremath{\gamma}{(P}^{2})$ is expressed in terms of perturbative pointlike and nonperturbative hadronic (VMD) components, employing recently updated parton distributions of pions and protons. The resulting parameter-free and perturbatively stable LO and NLO parton densities ${f}^{\ensuremath{\gamma}{(P}^{2})}{(x,Q}^{2})$ are smooth in ${P}^{2}$ and apply to all ${P}^{2}g~0$ whenever…

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## References

SHOWING 1-10 OF 111 REFERENCES

### Complete next-to-leading order QCD corrections to the photon structure functions F2 gamma (x,Q2) and FL gamma (x,Q2).

• Physics
Physical review. D, Particles and fields
• 1994
The heavy flavor content of the structure functions which is due to two different production mechanisms: namely, collisions of a virtual photon with a real photon and with a parton is studied.

### Deep-inelastic scattering beyond the leading order in asymptotically free gauge theories

• Physics
• 1978
We calculate the full order-${g}^{2}$ corrections to the coefficient functions which determine the ${Q}^{2}$ dependence of the moments of deep-inelastic structure functions. The calculation is

### Photonic parton distributions.

The quark and gluon distributions of the photon are determined in leading and higher order by imposing a vector-meson dominance (VMD) valencelike structure at a low resolution scale adopted from the

### Determination of the branching ratio ofρ0→+μ− in the coherent dissociation π−→μ+μ−π− and π−→π+π−π−

• Physics
• 1989
AbstractIn the diffraction dissociation of π− into μ+μ−π− on a Cu nucleus at 50 GeV/c, the cross section $$\sigma _{\mu ^ + \mu ^ - \pi ^ - }$$ for the 1+S(ρ0π) wave was measured. The branching

### Probing the parton densities of virtual photons at ep colliders.

• Physics
Physical review. D, Particles and fields
• 1996
A useful leading order parametrization of the proposed photonic parton densities, suitable for further studies of these issues, is presented.

### Parton content of virtual photons.

• Physics
Physical review. D, Particles and fields
• 1995
These remaining nonperturbative components, although being based on VMD-inspired simplicity, represent the largest uncertainty in the quantitative results and eventually have to be tested by future experiments.

### Mesonic parton densities derived from constituent quark model constraints

• Physics
• 1998
Abstract. Using constituent quark model constraints we calculate the gluon and sea content of pions solely in terms of their valence density and the known sea and gluon densities of the nucleon. The

### Parton fragmentation into photons beyond the leading order.

Photon production via deep inelastic quark and gluon fragmentation is studied beyond the leading perturbative order within the framework of a specific factorization scheme

### Low $Q^2$ jet production at HERA in next-to-leading order QCD

• Physics
• 1998
Abstract. We present next-to-leading order calculations of one- and two-jet production in eP collisions at HERA for photon virtualities in the range $1 < Q^2 < 100$ GeV $^2$. Soft and collinear

### Low- and high-mass components of the photon distribution functions

• Physics
• 1995
AbstractThe structure of the general solution of the inhomogeneous evolution equations allows the separation of a photon structure function into perturbative (“anomalous”) and non-perturbative