arXiv subjects

Korinna Zapp

Publications and source records attributed to Korinna Zapp.

22 records · Page 2Linked to original sources

arXiv2008

Parton Energy Loss Without Transverse Momentum Broadening

The JEWEL 1.0 Monte Carlo simulates jet evolution in a medium with a microscopic description of splitting and scattering processes. In the framework of this model we investigate the transverse momentum broadening due to medium effects in different scenarios. Depending on assumptions about hadronisation, we observe either a small increase or even a slight decrease of the mean transverse momentum, but no sizeable broadening. This appears to be a natural consequence of a model formulation which conserves energy and momentum microscopically at each splitting and at each scattering.

hep-ph↗

arXiv2007

Heavy Quark Energy Loss Through Soft QCD Scattering in the QGP

A strong suppression of non-photonic electrons in Au+Au collisions is observed at RHIC. This is in disagreement with the expected dominance of the energy loss via gluon radiation, which predicts a much weaker suppression of heavy flavours due to the dead cone effect. However, collisional energy loss is also important, as demonstrated recently by the Soft Colour Interaction Jet Quenching model. Based on this model we show that collisional energy loss of charm quarks gives a suppression of electrons of the observed magnitude, but the contribution from beauty decays, which dominates at intermediate and large pT, results in a somewhat weaker overall suppression of electrons than observed.

hep-ph↗

arXiv2006

Jet Quenching from soft QCD Scattering in the Quark-Gluon Plasma

We show that partons traversing a quark-gluon plasma can lose substantial amounts of energy also by scatterings, and not only through medium-induced radiation as mainly considered previously. Results from Monte Carlo simulations of soft interactions of partons, emerging from a hard scattering, through multiple elastic scatterings on gluons in an expanding relativistic plasma show a sizeable jet quenching which can account for a substantial part of the effect observed in RHIC data.

hep-ph↗

arXiv2005

The Soft Scattering Contribution to Jet Quenching in a Quark-Gluon Plasma and General Properties of Partonic Energy Loss

Starting from the observation that soft rescattering of hard scattered partons from the colour charged remnant plays an important role in proton-proton collisions a similar model for soft scatterings in a quark-gluon plasma was constructed and implemented as a Monte Carlo event generator. The main emphasis was put on the question to what extend these soft scatterings can contribute to the energy loss that an energetic parton suffers, when it traverses a quark-gluon plasma. It was found that the soft scattering can account for up to 50% of the observed energy loss. Furthermore, it was investigated what information present data reveal about the general features of partonic energy loss. This study was carried out with a Monte Carlo model that includes the full simulation of the quark-gluon plasma but uses a more general ansatz for the energy loss which makes it possible to emulate different scenarios like coherent gluon bremsstrahlung, scattering etc. Unfortunately, it turned out that it is difficult to differentiate between them so that at present no clear decision in favour of one or the other is possible.

hep-ph↗