L. Köpke

TL;DR: In this article, the authors describe the concept, technical realisation and validation of a largely data-driven method to model events with Z→ττ decays, which is particularly relevant for Higgs boson searches and analyses in ττ final states, where Zarrowτ τ decays constitute a large irreducible background that cannot be obtained directly from data control samples.

TL;DR: A Fourier analysis of the charged particle pair distribution in relative azimuthal angle (φ = φ a − φ b) is performed to extract the coefficients v n,n = =cos nnφ.

TL;DR: In this paper, an unbinned method to search for localized cosmic particle sources is presented, where the expected source shape, the measured background shape, and the estimated angular resolution of individual tracks are used to construct a likelihood function.

TL;DR: In this article, the decay rate of the neutral K meson KL→e+e−γ has been measured with the NA48 detector at the CERN SPS, where a total of 6864 events has been observed with an estimated background of 10 events.

TL;DR: In a preliminary version of the NA48 experiment at the CERN SPS, in which an iron-scintillator sandwich calorimeter was used as a photon detector, the branching ratio BR(K L →πμνγ, E γ ∗ ≥ 30 MeV )/(K L→ πμν ) is found to be (2.08±0.17 + 0.21 )×10 −3, where the first error is statistical and the second systematic as mentioned in this paper.