Quantum Physics Division
Faculty of PhysicsAdam Mickiewicz University

Topological susceptibility from twisted mass fermions using spectral projectors

K. Cichy1,2 , E. Garcia-Ramos 1,3 , K. Jansen1 , A. Shindler1,4

2 Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614, Poznan, Poland
3 Humboldt Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany
1 NIC, DESY Zeuthen, Platanenallee 6, 15738 Zeuthen, Germany
4 IAS, IKP and JCHP, Forschungszentrum Jülich, 52428 Jülich, Germany

Proceedings of Science, PoS(LATTICE 2013) 129 (2013)


We discuss the computation of the topological susceptibility using the method of spectral pro- jectors and dynamical twisted mass fermions. We present our analysis concerning the O(a)- improvement of the topological susceptibility and we show numerical results for N f = 2 and N f = 2 + 1 + 1 flavours, performing a study of the quark mass dependence in terms of leading order chiral perturbation theory.


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