Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/76822
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Type: | Journal article |
Title: | Nucleon mass and sigma term from lattice QCD with two light fermion flavors |
Author: | Bali, G. Bruns, P. Collins, S. Deka, M. Glaessle, B. Gockeler, M. Greil, L. Hemmert, T. Horsley, R. Najjar, J. Nakamura, Y. Nobile, A. Pleiter, D. Rakow, P. Schafer, A. Schiel, R. Schierholz, G. Sternbeck, A. Zanotti, J. |
Citation: | Nuclear Physics B, 2013; 866(1):1-25 |
Publisher: | Elsevier Science BV |
Issue Date: | 2013 |
ISSN: | 0550-3213 1873-1562 |
Statement of Responsibility: | QCDSF Collaboration, G.S. Bali ... J. Zanotti ... et al. |
Abstract: | We analyze Nf=2 nucleon mass data with respect to their dependence on the pion mass down to mπ=157MeV 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 σ-term. Our lattice data below mπ=435MeV is well described by O(p4) BChPT and we find σ=37(8)(6)MeV for the σ-term at the physical point. Using the nucleon mass to set the scale we obtain a Sommer parameter of r0=0.501(10)(11)fm. © 2012 Elsevier B.V. |
Keywords: | Nucleon mass Pion–nucleon sigma term Sommer scale Covariant baryon chiral perturbation theory Finite size corrections |
Rights: | © 2012 Elsevier B.V. All rights reserved. |
DOI: | 10.1016/j.nuclphysb.2012.08.009 |
Grant ID: | http://purl.org/au-research/grants/arc/FT100100005 http://purl.org/au-research/grants/arc/FT100100005 |
Published version: | http://dx.doi.org/10.1016/j.nuclphysb.2012.08.009 |
Appears in Collections: | Aurora harvest 4 Chemistry and Physics publications |
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hdl_76822.pdf | Accepted version | 829.33 kB | Adobe PDF | View/Open |
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