Search results for "Strange"
showing 10 items of 551 documents
"Table 3" of "Spin alignment and violation of the OZI rule in exclusive $\omega$ and $\phi$ production in pp collisions"
2014
Spin alignment RHO(00) extracted from the helicity angle distributions for PHI and OMEGA production, in the latter case with various cuts on P(V). The uncertainty is the propagated uncertainty from the linear fits, which in turn includes the quadratic sum of statistical uncertainties and uncertainties from the background subtraction.
"Table 1" of "Identified particles in quark and gluon jets."
1997
Y events.
"Table 2" of "Identified particles in quark and gluon jets."
1997
Mercedes events.
"Table 9" of "Identified Charged Particles in Quark and Gluon Jets"
2003
Jet flavor tagging is used. 'Y' events, mirror symmetric events, the angle between the most energetic jet and other two jets is 150 +- 15 deg.. CONST(NAME=XISTAR) is maximum of log(P(C=CHARGED)/P(C=JET)) distribution.
"Table 10" of "Identified Charged Particles in Quark and Gluon Jets"
2003
Jet flavor tagging is used. 'Mercedes' events, three-fold symmetric events, the angle between three jets is 120 +- 15 deg.. CONST(NAME=XISTAR) is maximum of log(P(C=CHARGED)/P(C=JET)) distribution.
"Table 4" of "Flavour Separation of Helicity Distributions from Deep Inelastic Muon-Deuteron Scattering"
2010
The measured strange quark helicity distribution as a funxtion of X.
"Table 3" of "Flavour Separation of Helicity Distributions from Deep Inelastic Muon-Deuteron Scattering"
2010
Correlations coefficients of the unfolded asymmetries.
ε′/ε in the standard model
2001
We overview the detailed analysis of e ' /e within the Standard Model, pre- sented in ref. (1). When all sources of large logarithms are considered, both at short and long distances, it is possible to perform a reliable Standard Model estimate of e ' /e. The strong S-wave rescattering of the final pions has an important impact on this observ- able (1, 2). The Standard Model prediction is found to be (1) Re(e ' /e) = (1.7 ±0.9) � 10 −3 , in good agreement with the most recent experimental measurements. A better estimate of the strange quark mass would reduce the uncertainty to about 30%.
High-precision calculation of the strange nucleon electromagnetic form factors
2015
We report a direct lattice QCD calculation of the strange nucleon electromagnetic form factors $G_E^s$ and $G_M^s$ in the kinematic range $0 \leq Q^2 \lesssim 1.2\: {\rm GeV}^2$. For the first time, both $G_E^s$ and $G_M^s$ are shown to be nonzero with high significance. This work uses closer-to-physical lattice parameters than previous calculations, and achieves an unprecedented statistical precision by implementing a recently proposed variance reduction technique called hierarchical probing. We perform model-independent fits of the form factor shapes using the $z$-expansion and determine the strange electric and magnetic radii and magnetic moment. We compare our results to parity-violatin…
The strange-quark mass from QCD sum rules in the pseudoscalar channel
1997
QCD Laplace transform sum rules, involving the axial-vector current divergences, are used in order to determine the strange quark mass. The two-point function is known in QCD up to four loops in perturbation theory, and up to dimension-six in the non-perturbative sector. The hadronic spectral function is reconstructed using threshold normalization from chiral symmetry, together with experimental data for the two radial excitations of the kaon. The result for the running strange quark mass, in the $\bar{MS}$ scheme at a scale of 1 ${GeV}^{2}$ is: ${\bar m}_{s}(1 GeV^{2}) = 155 \pm 25 {MeV}$.