This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevLett.112.202301 in citations.
Please use the identifier: http://hdl.handle.net/2128/8224 in citations.
Please use the identifier: http://hdl.handle.net/2128/9127 in citations.
Evidence for a New Resonance from Polarized Neutron-Proton Scattering
Evidence for a New Resonance from Polarized Neutron-Proton Scattering
Exclusive and kinematically complete high-statistics measurements of quasifree polarized n⃗ p scattering have been performed in the energy region of the narrow resonancelike structure d∗ with I(JP)=0(3+), M≈2380 MeV, and Γ≈70 MeV observed recently in the double-pionic fusion channels pn→dπ0π0 and...
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Please use the identifier: http://hdl.handle.net/2128/8224 in citations.
Please use the identifier: http://hdl.handle.net/2128/9127 in citations.
Exclusive and kinematically complete high-statistics measurements of quasifree polarized n⃗ p scattering have been performed in the energy region of the narrow resonancelike structure d∗ with I(JP)=0(3+), M≈2380 MeV, and Γ≈70 MeV observed recently in the double-pionic fusion channels pn→dπ0π0 and pn→dπ+π−. The experiment was carried out with the WASA detector setup at COSY having a polarized deuteron beam impinged on the hydrogen pellet target and utilizing the quasifree process d⃗ p→np+pspectator. This allowed the np analyzing power, Ay, to be measured over a broad angular range. The obtained Ay angular distributions deviate systematically from the current SAID SP07 NN partial-wave solution. Incorporating the new Ay data into the SAID analysis produces a pole in the D33−G33 waves in support of the d∗ resonance hypothesis |