Light quark masses from scalar sum rules
| dc.creator | Jamin, Matthias | |
| dc.creator | Oller, Jose Antonio | |
| dc.creator | Pich, Antonio | |
| dc.date | 2001-10-15 | |
| dc.date | 2002-02-21 | |
| dc.date.accessioned | 2026-07-07T10:32:56Z | |
| dc.date.available | 2026-07-07T10:32:56Z | |
| dc.description | In this work, the mass of the strange quark is calculated from QCD sum rules for the divergence of the strangeness-changing vector current. The phenomenological scalar spectral function which enters the sum rule is determined from our previous work on strangeness-changing scalar form factors [1]. For the running strange mass in the MS_bar scheme, we find m_s(2 GeV) = 99 +- 16 MeV. Making use of this result and the light-quark mass ratios obtained from chiral perturbation theory, we are also able to extract the masses of the lighter quarks m_u and m_d. We then obtain m_u(2 GeV) = 2.9 +- 0.6 MeV and m_d(2 GeV) = 5.2 +- 0.9 MeV. In addition, we present an updated value for the light quark condensate. | |
| dc.description | 19 pages, 2 figures, 1 table, text improved, references added, version to be published in Eur. Phys. J C | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0110194 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0110194 | |
| dc.identifier | Eur.Phys.J.C24:237-243,2002 | |
| dc.identifier | doi:10.1007/s100520200930 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/178930 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Experiment | |
| dc.subject | High Energy Physics - Lattice | |
| dc.subject | Nuclear Theory | |
| dc.title | Light quark masses from scalar sum rules | |
| dc.type | text |