2024-03-28T20:51:00Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/331542016-02-17T03:08:41Zcom_10261_61com_10261_4col_10261_314
2011-03-08T10:48:28Z
urn:hdl:10261/33154
Light quark masses from scalar sum rules
Jamin, Matthias
Oller, José Antonio
Pich, Antonio
7 páginas, 2 figuras, 1 tabla.-- arXiv:hep-ph/0110194v2
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.
2011-03-08T10:48:28Z
2011-03-08T10:48:28Z
2002-04-12
artículo
European Physical Journal C - Particles and Fields 24(2): 237-243 (2002)
1434-6044
http://hdl.handle.net/10261/33154
10.1007/s100520200930
eng
http://dx.doi.org/10.1007/s100520200930
openAccess
Springer