出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We study mesons on the lattice with a special focus on excited states. For that purpose we construct
several quark sources with different spatial smearings, including p-waves. These quark
sources are then combined with the appropiate Dirac structures to form meson interpolators of
definite spin. We use these operators to construct a cross correlation matrix from which we extract
ground and excited meson states using the variational method. For the calculations we use
gauge configurations with Nf = 2 dynamical Clover Wilson fermions provided by the CP-PACS
collaboration. We show preliminary results for pseudoscalar, scalar, vector and pseudovector
mesons.
