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 |
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| Titel eines Journals oder einer Zeitschrift: | Nuclear Physics B |
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| Verlag: | ELSEVIER SCIENCE BV |
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| Ort der Veröffentlichung: | AMSTERDAM |
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| Band: | 866 |
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| Nummer des Zeitschriftenheftes oder des Kapitels: | 1 |
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| Seitenbereich: | S. 1-25 |
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| Datum: | 2013 |
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| Institutionen: | Physik > Institut für Theoretische Physik |
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| Identifikationsnummer: | | Wert | Typ |
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| 10.1016/j.nuclphysb.2012.08.009 | DOI |
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| 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 |
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| Dewey-Dezimal-Klassifikation: | 500 Naturwissenschaften und Mathematik > 530 Physik |
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| Status: | Veröffentlicht |
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| Begutachtet: | Ja, diese Version wurde begutachtet |
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| An der Universität Regensburg entstanden: | Ja |
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| Dokumenten-ID: | 63013 |
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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.
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