20 resultados para SCALAR MESONS
em BORIS: Bern Open Repository and Information System - Berna - Suiça
Search for second generation scalar leptoquarks in pp collisions at s√=7 TeV with the ATLAS detector
Search for the Lightest Scalar Top Quark in Events with Two Leptons in pp Collisions at √ s=1.96 TeV
Resumo:
We present a coupled system of integral equations for the pp → ¯NN and ¯K K → ¯N N S-waves derived from Roy–Steiner equations for pion–nucleon scattering. We discuss the solution of the corresponding two-channel Muskhelishvili–Omnès problem and apply the results to a dispersive analysis of the scalar form factor of the nucleon fully including ¯KK intermediate states. In particular, we determine the corrections Ds and DD, which are needed for the extraction of the pion– nucleon s term from pN scattering, and show that the difference DD −Ds = (−1.8±0.2)MeV is insensitive to the input pN parameters.