ω Production in the reaction π−p → π+π−π0n at 8 and 12 GeV/c

The reaction π^?p → ωn has been studied at 8 and 12 GeV/c incident momenta with the CERN Omega spectrometer using a neutron time of flight trigger. The differential cross sections and the ω-decay density matrix elements are presented as functions of the momentum transfer squared ?t in the range of 0.02 to 0.80 GeV². The data are used to evaluate the intercept and slope of both the natural and unnatural parity exchange trajectories. Regge exchange amplitude factorisation tests involving the reaction πN → ωN are investigated.     

Partial-wave analysis of the reaction K−p → Λ (1520) π in the energy region 1915 – 2170 MeV

A partial-wave analysis has been carried out on the reaction K^? p → Λ (1520)π → K^?pπ⁰. The ∑ (2030) is observed with an amplitude at resonance of 0.14 ± 0.03. Evidence is also presented for the formation of the $\text{3}{}^{\mathrm{?}}\text{2}\text{∑(1940)}$.     

"Going KiNativ": probing the Native Kinome

In this issue, Patricelli et?al. (2011) describe an in?situ chemoproteomics approach (KiNativ?) for profiling the?kinome and kinome response to specific kinase inhibitors that enables characterization of inhibitor interactions with endogenously expressed kinases in native conditions.     

Improved search for Muon-neutrino to electron-neutrino oscillations in MINOS

We report the results of a search for ν(e) appearance in a ν(μ) beam in the MINOS long-baseline neutrino experiment. With an improved analysis and an increased exposure of 8.2 × 10(20) protons on the NuMI target at Fermilab, we find that 2 sin(2) (θ(23))sin(2)(2θ(13))<0.12(0.20) at 90% confidence level for δ = 0 and the normal (inverted) neutrino mass hierarchy, with a best-fit of 2sin(2) (θ(23))sin(2)(2θ(13)) = 0.041(-0.031)(+0.047) (0.079(-0.053) (+0.071)). The θ(13) = 0 hypothesis is disfavored by the MINOS data at the 89% confidence level.     

An amplitude analysis of ππ scattering from new data on the reaction π−p→π+π−n

We have carried out a partial-wave analysis of ππ scattering in the mass range 1.0 to 2.08 GeV/c². We find solutions similar to those obtained in previous analyses below 1.8 GeV/c² but, in addition, we obtain a new solution which does not suffer from violations of unitarity and is compatible with data from other channels. This solution, when continued to 2.08 GeV/c², shows a g meson with mass and width of 1.734± 0.010 GeV/c²and 0.322±0.035 GeV/c² respectively, and an h meson with mass 1.935±0.013 GeV/c²and width 0.263±0.057 GeV/c². The L = 2 partial wave contains the f meson and an additional resonance with parameters m = 1.502±0.025 Gev/c², Γ = 0.165±0.042 GeV/c²and x = 0.19±0.03. If we associate this state with the f′(1514), our ππ branching fraction is considerably higher than previous determinations. An SU(3) fit to the 2⁺ nonet yields a mixing angle of 38.4± 1.3°.     

Partial-wave analysis of the reaction K−p → K Δ (1230) in the energy region 1915–2170 MeV

A partial-wave analysis has been carried out on the reaction K^?p → K^?Δ⁺(1230) → → K^?pπ⁰ in the centre of mass energy region 1915–2170 MeV. The ∑(2030) is observed with an amplitude at resonance of 0.16 ± 0.03. Strong formation of the $\text{3}\text{2}{}^{\mathrm{?}}\text{∑(1940)}$ is also indicated.     

Energy-independent partial-wave analysis of KN → Λ gp between 1540 and 2150 MeV

An exhaustive partial-wave analysis of the reaction $\text{K}\text{N}\text{→ Λπ}$ has been carried out on a compilation of all available data using two separate semi-energy-independent methods. Particular attention has been given to finding all ambiguous solutions. Two possible solutions are found consistent with the physical assumptions imposed. The parameters of the resonances appearing in the two solutions are given.