ChemInform Abstract: 1′,2′‐Secothymidines. The Preparation of 2,3′‐Anhydro Derivatives and the Formation of Two Unusual Dimeric Products.

Abstract

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Continuum limit of overlap valence quarks on a twisted mass sea

“…Furthermore, their effects vary from one observable to another. We refer to a forthcoming publication [49] for a study of the impact of zero modes on other observables and operators. For some observables, isolating the contribution from The parameter values in the "safe" region are such that the effects of chiral zero modes of the overlap operator are negligible.…”

“…In the regime of quark masses that we consider in this work this appears to be a negligible effect. In general, we observe clear signals for the plateaux, which we have furthermore controlled by comparing the extracted values of m π and f π to an analysis including an estimate of the systematic effect due to the choice of the fit interval, see also [49]. • For twisted mass fermions, the use of C PP−SS (t), instead of C PP (t), has a negligible impact on the values of f π and m π in the regime of parameters (quark mass, lattice size and lattice spacing) that we consider in this work.…”

“…Indeed, it is known that the scalar correlator C SS (t) is especially vulnerable to the double pole contribution to the meson propagator [22]. This unphysical effect is present in all unitarity violating setups (quenched, partially quenched and mixed action) and a separate analysis indicates that the scalar correlator indeed obtains a negative contribution of this kind, which has opposite sign with respect to the one from zero modes [49]. • The C PP−SS (t) correlator receives excited state contributions from the scalar correlator.…”

“…Preliminary results were presented in[48] and we refer to a forthcoming publication[49] for more details about this aspect.…”