Baryon masses with dynamical twisted mass fermions
dc.contributor.author | Alexandrou, C | |
dc.date.accessioned | 2018-07-25T15:25:00Z | |
dc.date.available | 2018-07-25T15:25:00Z | |
dc.date.issued | 2008-03-21 | |
dc.identifier.issn | 1824-8039 | |
dc.identifier.uri | http://hdl.handle.net/10026.1/11910 | |
dc.description | 7 pages, 9 figures. Talk presented at the XXV International Symposium on Lattice Field Theory, July 30 - August 4 2007, Regensburg, Germany | |
dc.description.abstract |
We present results on the mass of the nucleon and the ∆ using two dynamical degenerate twisted mass quarks. The evaluation is performed at four quark masses corresponding to a pion mass in the range of 690-300 MeV on lattices of size 2.1 fm and 2.7 fm. We check for cutoff effects by evaluating these baryon masses on lattices of spatial size 2.1 fm with lattice spacings a(β = 3.9) = 0.0855(6) fm and a(β = 4.05) = 0.0666(6) fm, determined from the pion sector and find them to be within our statistical errors. Lattice results are extrapolated to the physical limit using continuum chiral perturbation theory. The nucleon mass at the physical point provides a determination of the lattice spacing. Using heavy baryon chiral perturbation theory at O(p3) we find a(β = 3.9) = 0.0879(12) fm, with a systematic error due to the chiral extrapolation estimated to be about the same as the statistical error. This value of the lattice spacing is in good agreement with the value determined from the pion sector. We check for isospin breaking in the ∆-system. We find that ∆++,− and ∆+,0 are almost degenerate pointing to small flavor violating effects. | |
dc.format.extent | 087- | |
dc.language.iso | en | |
dc.publisher | Sissa Medialab | |
dc.subject | hep-lat | |
dc.subject | hep-lat | |
dc.subject | hep-ph | |
dc.subject | nucl-th | |
dc.title | Baryon masses with dynamical twisted mass fermions | |
dc.type | conference | |
dc.type | Conference Proceeding | |
plymouth.author-url | http://arxiv.org/abs/0710.1173v1 | |
plymouth.date-start | 2007-07-30 | |
plymouth.volume | 42 | |
plymouth.conference-name | The XXV International Symposium on Lattice Field Theory | |
plymouth.publication-status | Published | |
plymouth.journal | Proceedings of The XXV International Symposium on Lattice Field Theory — PoS(LATTICE 2007) | |
dc.identifier.doi | 10.22323/1.042.0087 | |
plymouth.organisational-group | /Plymouth | |
plymouth.organisational-group | /Plymouth/Faculty of Science and Engineering | |
plymouth.organisational-group | /Plymouth/REF 2021 Researchers by UoA | |
plymouth.organisational-group | /Plymouth/REF 2021 Researchers by UoA/EXTENDED UoA 10 - Mathematical Sciences | |
plymouth.organisational-group | /Plymouth/REF 2021 Researchers by UoA/UoA10 Mathematical Sciences | |
plymouth.organisational-group | /Plymouth/Users by role | |
plymouth.organisational-group | /Plymouth/Users by role/Academics | |
dc.identifier.eissn | 1824-8039 | |
dc.rights.embargoperiod | No embargo | |
rioxxterms.versionofrecord | 10.22323/1.042.0087 | |
rioxxterms.licenseref.uri | http://www.rioxx.net/licenses/all-rights-reserved | |
rioxxterms.type | Conference Paper/Proceeding/Abstract |