Bali, G.S. ; Bruns, P.C. ; Collins, S. ; Deka, M. ; Gläßle, B. ; Göckeler, M. ; Greil, L. ; Hemmert, T.R. ; Horsley, R. ; Najjar, J. ; Nakamura, Y. ; Nobile, A. ; Pleiter, D. ; Rakow, P.E.L. ; Schäfer, A. ; Schiel, R. ; Schierholz, G. ; Sternbeck, A. ; Zanotti, J.
Alternative Links zum Volltext:DOIVerlag
Dokumentenart: | Artikel |
---|
Titel eines Journals oder einer Zeitschrift: | Nuclear Physics B |
---|
Verlag: | ELSEVIER SCIENCE BV |
---|
Ort der Veröffentlichung: | AMSTERDAM |
---|
Band: | 866 |
---|
Nummer des Zeitschriftenheftes oder des Kapitels: | 1 |
---|
Seitenbereich: | S. 1-25 |
---|
Datum: | 2013 |
---|
Institutionen: | Physik > Institut für Theoretische Physik |
---|
Identifikationsnummer: | Wert | Typ |
---|
10.1016/j.nuclphysb.2012.08.009 | DOI |
|
---|
Stichwörter / Keywords: | CHIRAL PERTURBATION-THEORY; ONE-LOOP; EXPANSION; ORDER; Nucleon mass; Pion-nucleon sigma term; Sommer scale; Covariant baryon chiral perturbation theory; Finite size corrections |
---|
Dewey-Dezimal-Klassifikation: | 500 Naturwissenschaften und Mathematik > 530 Physik |
---|
Status: | Veröffentlicht |
---|
Begutachtet: | Ja, diese Version wurde begutachtet |
---|
An der Universität Regensburg entstanden: | Ja |
---|
Dokumenten-ID: | 63013 |
---|
Zusammenfassung
We analyze N-f = 2 nucleon mass data with respect to their dependence on the pion mass down to m(pi) = 157 MeV and compare it with predictions from covariant baryon chiral perturbation theory (BChPT). A novel feature of our approach is that we fit the nucleon mass data simultaneously with the directly obtained pion nucleon sigma-term. Our lattice data below m(pi) = 435 MeV is well described by ...
Zusammenfassung
We analyze N-f = 2 nucleon mass data with respect to their dependence on the pion mass down to m(pi) = 157 MeV and compare it with predictions from covariant baryon chiral perturbation theory (BChPT). A novel feature of our approach is that we fit the nucleon mass data simultaneously with the directly obtained pion nucleon sigma-term. Our lattice data below m(pi) = 435 MeV is well described by O(p(4)) BChPT and we find sigma = 37(8)(6) MeV for the a-term at the physical point. Using the nucleon mass to set the scale we obtain a Sommer parameter of r(0) = 0.501(10)(11) fm. (C) 2012 Elsevier B.V. All rights reserved.