280 citations · 3.3k across the 88 of their papers we have counts for
35 papers · 1 filter
50 Years of Quantum Chromodynamics
Franz Gross, Eberhard Klempt, Stanley J. Brodsky +92
This paper presents a comprehensive review of both the theory and experimental successes of Quantum Chromodynamics, starting with its emergence as a well defined theory in 1972-73…
Quark-Hadron Transition and Entanglement
Berndt Müller, Andreas Schäfer
The dual holographic description has enjoyed many successes in explaining fundamental properties of the early stages of relativistic heavy ion collisions up to the formation of a m…
Separation of Quark Flavors using DVCS Data
Marija Cuic, Kresimir Kumericki, Andreas Schafer
Using the available data on deeply virtual Compton scattering (DVCS) off protons and utilizing neural networks enhanced by the dispersion relation constraint, we determine six out…
Sum rule improved double parton distributions in position space
Markus Diehl, Jonathan R. Gaunt, Daniel M. Lang +2
Models for double parton distributions that are realistic and consistent with theoretical constraints are crucial for a reliable description of double parton scattering. We show ho…
Two-loop splitting in double parton distributions
Markus Diehl, Jonathan R. Gaunt, Peter Ploessl +1
Double parton distributions (DPDs) receive a short-distance contribution from a single parton splitting to yield the two observed partons. We investigate this mechanism at next-to-…
The Chiral Magnetic Effect and an experimental bound on the late time magnetic field strength
Berndt Müller, Andreas Schäfer
We first compare different approaches to estimates of the magnitude of the chiral magnetic effect in relativistic heavy ion collisions and show that their main difference lies in t…
B form factors with light-cone sum rules
Maximilian Emmerich, Matthias Strohmaier, Andreas Schäfer
We construct the quark-antiquark chiral odd distribution amplitudes including twist-four mass contributions for tensor mesons. We also give quark-antiquark-gluon distribution ampli…
Direct- and Resolved-Photon Threshold Resummation for Polarized High- Hadron Production at COMPASS
Claudia Uebler, Andreas Schäfer, Werner Vogelsang
We complete our earlier study of the "direct" part of the cross section and spin asymmetry for the photoproduction process by analysing the "resolved" contribut…
Spin Decomposition of Electron in QED
Xiangdong Ji, Andreas Schäfer, Feng Yuan +2
We perform a systematic study on the spin decomposition of an electron in QED at one-loop order. It is found that the electron orbital angular momentum defined in Jaffe-Manohar and…
Excited light and strange hadrons from the lattice with two Chirally Improved quarks
Georg P. Engel, C. B. Lang, Daniel Mohler +1
Results for excited light and strange hadrons from the lattice with two flavors of Chirally Improved sea quarks are presented. We perform simulations at several values of the pion…
Chiral extrapolation of baryon mass ratios
P. C. Bruns, L. Greil, A. Schäfer
We analyze lattice data for octet baryon masses from the QCDSF collaboration employing manifestly covariant Baryon Chiral Perturbation Theory. It is shown that certain combinations…
Azimuthal asymmetries for quark pair production in pA collisions
Emin Akcakaya, Andreas Schäfer, Jian Zhou
We study the azimuthal asymmetries for quark pair production in proton-nucleus collisions using a hybrid approach in which the nucleus is treated in the Color Glass Condensate (CGC…
Transverse energy density fluctuations in the Color Glass Condensate Model
Berndt Müller, Andreas Schäfer
We calculate the transverse correlation of fluctuations of the deposited energy density in nuclear collisions in the framework of the Gaussian color glass condensate model.
Entropy Creation in Relativistic Heavy Ion Collisions
Berndt Müller, Andreas Schäfer
We review current ideas on entropy production during the different stages of a relativistic nuclear collision. This includes recent results on decoherence entropy and the entropy p…
Threshold-Resummed Cross Section for the Drell-Yan Process in Pion-Nucleon Collisions at COMPASS
Matthias Aicher, Andreas Schäfer, Werner Vogelsang
We present a study of the Drell-Yan process in pion-proton collisions including next-to-leading-logarithmic threshold-resummed contributions. We analyze rapidity-integrated as well…
Theoretical considerations on multiparton interactions in QCD
Markus Diehl, Andreas Schafer
We investigate several ingredients for a theory of multiple hard scattering in hadron-hadron collisions. Issues discussed include the space-time structure of multiple interactions,…
Towards a Theory of Entropy Production in the Little and Big Bang
Teiji Kunihiro, Berndt Muller, Akira Ohnishi +1
We propose a broadly applicable formalism for the description of coarse grained entropy production in quantum mechanical processes. Our formalism is based on the Husimi transform o…
Proton dissociation into three jets
V. M. Braun, D. Yu. Ivanov, A. Schäfer
We explore the possibility to observe hard exclusive three-jet production in early LHC runs, corresponding to diffractive dissociation of the incident proton into three jets with l…
Photoproduction of Hadron Pairs at Fixed-Target Experiments
Christof Hendlmeier, Marco Stratmann, Andreas Schafer
We consider the photoproduction of two hadrons in polarized lepton-nucleon collisions in the framework of perturbative QCD at the next-to-leading order accuracy. After illustrating…
Multiple Parton Scattering in Nuclei: Quark-quark Scattering
Andreas Schafer, Xin-Nian Wang, Ben-Wei Zhang
Modifications to quark and antiquark fragmentation functions due to quark-quark (antiquark) double scattering in nuclear medium are studied systematically up to order \cal{O}(α_{s}…
Evolution Equation for Generalized Parton Distributions
M. Kirch, A. Manashov, A. Schafer
The extension of the method [arXiv:hep-ph/0503109] for solving the leading order evolution equation for Generalized Parton Distributions (GPDs) is presented. We obtain the solution…
Complex conformal spin partial wave expansion of generalized parton distributions and distribution amplitudes
D. Müller, A. Schäfer
We introduce a new representation of generalized parton distributions and generalized distribution amplitudes that is based on the partial wave decomposition with respect to the co…
Solving the leading order evolution equation for GPDs
A. Manashov, M. Kirch, A. Schafer
An analytic method for the solution of the evolution equation for GPDs is presented. The small x, xi asymptotics of GPDs are calculated.
Entropy Production in High Energy Processes
Berndt Müller, Andreas Schäfer
We calculate the entropy produced in the decoherence of a classical field configuration and compare it with the entropy of a fully thermalized state with the same energy. We find t…