Improved dispersive analysis of the scalar form factor of the nucleon

Hoferichter, Martin; Ditsche, Christoph; Kubis, Bastian; Meissner, Ulf-G. (2013). Improved dispersive analysis of the scalar form factor of the nucleon. PoS - proceedings of science, CD12, 069. Scuola Internazionale Superiore di Studi Avanzati SISSA

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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.

Item Type:

Conference or Workshop Item (Paper)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Hoferichter, Martin

Subjects:

500 Science > 530 Physics

ISSN:

1824-8039

Publisher:

Scuola Internazionale Superiore di Studi Avanzati SISSA

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

18 Jun 2014 15:11

Last Modified:

13 Dec 2014 10:04

BORIS DOI:

10.7892/boris.42582

URI:

https://boris.unibe.ch/id/eprint/42582

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