Refine
Year of publication
- 2008 (49) (remove)
Document Type
- Doctoral Thesis (21)
- Article (7)
- Conference Proceeding (6)
- Master's Thesis (5)
- Other (5)
- Periodical Parts (2)
- Bachelor Thesis (1)
- Preprint (1)
- Working Paper (1)
Keywords
- Spektroskopie (3)
- Datenanalyse (2)
- Elementarteilchen (2)
- Kernphysik (2)
- LHC (2)
- Quark-Gluon-Plasma (2)
- Schwerionenphysik (2)
- Teilchenbeschleuniger (2)
- (n (1)
- ALICE (1)
Institute
- Physik (49) (remove)
- Fachspezifischer Anhang zur SPoL (Teil III): Studienfach Physik in den Studiengängen L2 und L5 (2008)
-
The finite-temperature phase structure of lattice QCD with twisted-mass Wilson fermions
(2008)
- We report progress in our exploration of the finite-temperature phase structure of two-flavour lattice QCD with twisted-mass Wilson fermions and a tree-level Symanzik-improved gauge action for a temporal lattice size Nt = 8. Extending our investigations to a wider region of parameter space we gain a global view of the rich phase structure. We identify the finite temperature transition/ crossover for a non-vanishing twisted-mass parameter in the neighbourhood of the zerotemperature critical line at sufficiently high b . Our findings are consistent with Creutz’s conjecture of a conical shape of the finite temperature transition surface. Comparing with NLO lattice cPT we achieve an improved understanding of this shape.
-
The adjoint potential in the pseudoparticle approach: string breaking and Casimir scaling
(2008)
- We perform a detailed study of the adjoint static potential in the pseudoparticle approach, which is a model for SU(2) Yang-Mills theory. We find agreement with the Casimir scaling hypothesis and there is clear evidence for string breaking. At the same time the potential in the fundamental representation is linear for large separations. Our results are in qualitative agreement with results from lattice computations.
-
Status of ETMC simulations with Nf = 2+1+1 twisted mass fermions
(2008)
- We present the status of runs performed in the twisted mass formalism with Nf =2+1+1 flavours of dynamical fermions: a degenerate light doublet and a mass split heavy doublet. The procedure for tuning to maximal twist will be described as well as the current status of the runs using both thin and stout links. Preliminary results for a few observables obtained on ensembles at maximal twist will be given. Finally, a reweighting procedure to tune to maximal twist will be described.
-
Static-light meson masses from twisted mass lattice QCD
(2008)
- We compute the static-light meson spectrum using two-flavor Wilson twisted mass lattice QCD. We have considered five different values for the light quark mass corresponding to 300MeV<~ mPS<~ 600MeV. We have extrapolated our results, to make predictions regarding the spectrum of B and Bs mesons.
-
Probing the composition of sub-millisecond rotating compact stars by r-modes instability
(2008)
- We investigate the implications of the r-modes instability on the composition of a compact star rotating at a sub-millisecond period. In particular, the only viable astrophysical scenario for such an object, wich might present inside the Low Mass X-ray Binary associated with the x-ray transient XTE J1739-285, is that it has a strangeness content. Since previous analysis indicate that hyperonic stars or stars containing a kaon condensate are unlikely because of the mass-shedding constraint, the only remaining possibility is that such an object is either a strange quark star or a hybrid quark-hadron star.
