Total and differential cross sections of η-production in proton–deuteron fusion for excess energies between Qη = 13 MeV and Qη = 81 MeV

The WASA-at-COSY Collaboration

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10 Citations (Scopus)

Abstract

New data on both total and differential cross sections of the production of η mesons in proton–deuteron fusion to He3η in the excess energy region 13.6MeV≤Qη≤80.9MeV are presented. These data have been obtained with the WASA-at-COSY detector setup located at the Forschungszentrum Jülich, using a proton beam at 15 different beam momenta between pp=1.60GeV/c and pp=1.74GeV/c. While significant structure of the total cross section is observed in the energy region 20MeV≲Qη≲60MeV, a previously reported sharp variation around Qη≈50MeV cannot be confirmed. Angular distributions show the typical forward-peaking that was noted earlier. For the first time, it is possible to study the development of these angular distributions with rising excess energy over a wide interval.

Original languageEnglish
Pages (from-to)297-304
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume782
DOIs
Publication statusPublished - 10 Jul 2018

Keywords

  • Meson production
  • Proton–deuteron interactions
  • η meson
  • PD SCATTERING
  • QUASI-FREE
  • HE-3
  • eta meson
  • NEAR-THRESHOLD
  • ELASTIC-SCATTERING
  • SMALL ANGLES
  • Proton-deuteron interactions

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