Study of p + d → 3A + π reactions in the Δ-resonance region

  • S. Abdel-Samad
  • J. Bojowald
  • A. Budzanowski
  • A. Chatterjee
  • J. Ernst
  • D. Frekers
  • P. Hawranek
  • J. Ilieva
  • L. Jarczyk
  • K. Kilian
  • S. Kliczewski
  • W. Klimala
  • D. Kolev
  • M. Kravčíková
  • T. Kutsarova
  • J. Lieb
  • H. Machner
  • A. Magiera
  • G. Martinská
  • H. Nann
  • L. Pentchev
  • D. Protić
  • P. von Rossen
  • B. J. Roy
  • R. Siudak
  • A. Strzałkowski
  • R. Tsenov
  • M. Uličný
  • J. Urbán
  • K. Zwoll
Conference paper

Abstract

A stack of annular detectors made of high-purity germanium was used to measure p + d3He + π 0 and p + d3H + π + differential and total cross-sections at beam momenta from 900 MeV/c to 1050 MeV/c. The total cross-sections are consistent with Δ-excitation. The differential data consist of two components. One corresponds to large momentum transfer from the projectile to the pion, the other to small momentum transfer. The former shows an independence of the slope as a function of the momentum transfer t (scaling). The scale parameter is different for π + and π 0 emission which violates isospin symmetry. The second component which is almost isotropic is in agreement with isospin symmetry. It is approximately a quarter of the total yield in the Δ-resonance region.

Keywords

Germanium 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • S. Abdel-Samad
    • 1
  • J. Bojowald
    • 1
  • A. Budzanowski
    • 3
  • A. Chatterjee
    • 9
  • J. Ernst
    • 7
  • D. Frekers
    • 8
  • P. Hawranek
    • 1
    • 3
  • J. Ilieva
    • 1
    • 5
  • L. Jarczyk
    • 3
  • K. Kilian
    • 1
  • S. Kliczewski
    • 4
  • W. Klimala
    • 1
    • 3
  • D. Kolev
    • 6
  • M. Kravčíková
    • 12
  • T. Kutsarova
    • 5
  • J. Lieb
    • 10
  • H. Machner
    • 1
  • A. Magiera
    • 1
    • 3
  • G. Martinská
    • 12
  • H. Nann
    • 11
  • L. Pentchev
    • 5
  • D. Protić
    • 1
  • P. von Rossen
    • 1
  • B. J. Roy
    • 9
  • R. Siudak
    • 4
  • A. Strzałkowski
    • 3
  • R. Tsenov
    • 6
  • M. Uličný
    • 1
    • 12
  • J. Urbán
    • 7
    • 12
  • K. Zwoll
    • 2
  1. 1.Institut für KernphysikForschungszentrum JülichJülichGermany
  2. 2.Zentrallabor für ElektronikForschungszentrum JülichJülichGermany
  3. 3.Institute of PhysicsJagellonian UniversityKrakówPoland
  4. 4.Institute of Nuclear PhysicsKrakówPoland
  5. 5.Institute of Nuclear Physics and Nuclear EnergySofiaBulgaria
  6. 6.Physics FacultyUniversity of SofiaSofiaBulgaria
  7. 7.Institut für Strahlen- und KernphysikUniversität BonnBonnGermany
  8. 8.Universität MünsterInstitut für KernphysikMünsterGermany
  9. 9.Nuclear Physics DivisionBARCBombayIndia
  10. 10.Physics DepartmentGeorge Mason UniversityFairfaxUSA
  11. 11.IUCFIndiana UniversityBloomingtonUSA
  12. 12.P.J. Safarik UniversityKošiceSlovakia

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