Determining the Θ+ quantum numbers through the K+p→π+K+n reaction

Determining the Θ Quantum Numbers through a Kaon Induced Reaction

In 2003, the LEPS collaboration reported a signal for a narrow S = +1 resonance around 1540 MeV in the experiment held at SPring-8. It is important for further theoretical studies to determine experimentally the quantum numbers of the Θ resonance such as spin and parity. Here we study the Kp → πKN reaction with different Θ quantum numbers, and see qualitative differences in observables dependin...

N ov 2 00 3 Determining the Θ + quantum numbers through the K + p → π + K + n reaction

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Determining the quantum numbers of excited heavy mesons

3. The central values of the branching ratios for D → Dγ and D → Dπ sum up to exactly 100 % [1]. Only closer inspection of both relevant experimental papers [2] reveals that this was one of the assumptions underlying the analyses. A similar assumption was made for D s , where again it was assumed that branching ratios for D s → D + s γ and D s → D + s π 0 sum to 100 % [3]. Although the current ...

Determining Spin through Quantum Azimuthal-Angle Correlations

Determining the spin of new particles is critical in identifying the true theory among various extensions of the Standard Model at the next generation of colliders. Quantum interference between different helicity amplitudes was shown to be effective when the final state is fully reconstructible. However, many interesting new physics processes allow only for partial reconstruction. In this paper...