Bounds on new light particles from high-energy and very small momentum transfer np elastic scattering data
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We found that spin-one new light particle exchanges are strongly bounded by high-energy and small momentum transfer np elastic scattering data; the analogous bound for a scalar particle is considerably weaker, while for a pseudoscalar particle no bounds can be set. These bounds are compared with the bounds extracted from low-energy n-Pb scattering experiments and from the bounds of pi0 and K+ meson decays.
16 pages with 4 figures; v2, v3 have minor grammatical changes
16 pages with 4 figures; v2, v3 have minor grammatical changes