We report on the first measurement of the F_{2} structure function of the neutron from the semi-inclusive scattering of electrons from deuterium, with low-momentum protons detected in the backward hemisphere. Restricting the momentum of the spectator protons to ≲100  MeV/c and their angles to ≳100° relative to the momentum transfer allows an interpretation of the process in terms of scattering from nearly on-shell neutrons. The F_{2}^{n} data collected cover the nucleon-resonance and deep-inelastic regions over a wide range of Bjorken x for 0.65<Q^{2}<4.52  GeV^{2}, with uncertainties from nuclear corrections estimated to be less than a few percent. These measurements provide the first determination of the neutron to proton structure function ratio F_{2}^{n}/F_{2}^{p} at 0.2≲x≲0.8 with little uncertainty due to nuclear effects.

A search for a Higgs boson in the four-lepton decay channel H→ZZ, with each Z boson decaying to an electron or muon pair, is reported. The search covers Higgs boson mass hypotheses in the range of 110<m_{H}<600  GeV. The analysis uses data corresponding to an integrated luminosity of 4.7  fb^{-1} recorded by the CMS detector in pp collisions at sqrt[s]=7  TeV from the LHC. Seventy-two events are observed with four-lepton invariant mass m_{4ℓ}>100  GeV (with 13 below 160 GeV), while 67.1±6.0 (9.5±1.3) events are expected from background. The four-lepton mass distribution is consistent with the expectation of standard model background production of ZZ pairs. Upper limits at 95% confidence level exclude the standard model Higgs boson in the ranges of 134-158 GeV, 180-305 GeV, and 340-465 GeV. Small excesses of events are observed around masses of 119, 126, and 320 GeV, making the observed limits weaker than expected in the absence of a signal.