| 1. |
- Boudard, A, et al.
(författare)
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Triplet np final state interactions at large momentum transfers
- 1996
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Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 389:3, s. 440-444
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Tidskriftsartikel (refereegranskat)abstract
- Using the simple relation between the np scattering and bound state wave functions, the spin-triplet contributions to the pp --> pi(+)(pn) and backward dp --> p(pn) reactions are estimated for low np excitation energies. The good agreement with the pion p
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| 2. |
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| 3. |
- Faldt, Goran, et al.
(författare)
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A comparison of np -> d eta and np -> np eta production rates
- 1996
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Ingår i: NUCLEAR PHYSICS A. - : ELSEVIER SCIENCE BV. - 0375-9474. ; 604:4, s. 441-454
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Tidskriftsartikel (refereegranskat)abstract
- It is shown that in the impulse approximation the ratio of the near-threshold np --> {np}(I=0) eta to np --> d eta production rates depends weakly upon the form of the production operator and can be estimated using low-energy neutron-proton dynamics. The
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| 4. |
- Faldt, Goran, et al.
(författare)
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Bound and unbound wave functions at short distances
- 1998
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Ingår i: AMERICAN JOURNAL OF PHYSICS. - : AMER INST PHYSICS. - 0002-9505. ; 66:10, s. 876-881
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Tidskriftsartikel (refereegranskat)abstract
- There exists a simple relationship between a quantum-mechanical bound-state wave function and that of nearby scattering states, when the scattering energy is extrapolated to that of the bound state. This relationship is demonstrated numerically for the ca
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| 5. |
- Faldt, Goran, et al.
(författare)
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Bound state and continuum production in large momentum transfer reactions
- 1996
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Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 382:3, s. 209-213
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Tidskriftsartikel (refereegranskat)abstract
- The cross sections for pp --> pn pi(+) and pd --> pd pi(0) are related to those for the corresponding reactions producing bound deuterons and He-3's respectively. The large momentum transfers in the reactions involve short range operators and under these
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| 6. |
- Faldt, Goran, et al.
(författare)
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Comparison of the near-threshold production of eta- and K-mesons in proton-proton collisions
- 1997
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Ingår i: ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI. - : SPRINGER VERLAG. - 0939-7922. ; 357:3, s. 241-243
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Tidskriftsartikel (refereegranskat)abstract
- The pp --> pp eta and pp --> p Lambda K+ reactions near threshold are dominated by the first and second S-11 resonance respectively. It is shown that a one-pion-exchange model exciting these isobars reproduces well the ratio of the production cross sectio
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| 7. |
- Faldt, Goran, et al.
(författare)
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Cross section and analyzing power of (p)over-right-arrow-p->pn pi(+) near threshold
- 1997
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Ingår i: PHYSICAL REVIEW C-NUCLEAR PHYSICS. - : AMER INST PHYSICS. - 0556-2813. ; 56:4, s. 2067-2073
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Tidskriftsartikel (refereegranskat)abstract
- The cross section and analyzing power of the (p)-over-right-arrow-p-->pn pi(+) reaction near threshold are estimated in terms of data obtained from the (p)-over-right-arrow-p-->d pi(+) and pp-->pp pi(0) reactions. A simple final state interaction theory i
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| 8. |
- Faldt, Goran, et al.
(författare)
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Scattering wave functions at bound state poles
- 1997
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Ingår i: PHYSICA SCRIPTA. - : ROYAL SWEDISH ACAD SCIENCES. - 0281-1847. ; 56:6, s. 566-570
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Tidskriftsartikel (refereegranskat)abstract
- The normalization relation between the bound and scattering S-state wave functions, extrapolated to the bound state pole, is derived from the Schrodinger equation. It is shown that, unlike previous work, the result does not depend on the details of the po
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| 9. |
- Faldt, Goran, et al.
(författare)
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The dd->He-4 eta reaction near threshold
- 1996
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Ingår i: NUCLEAR PHYSICS A. - : ELSEVIER SCIENCE BV. ; 596:3-4, s. 488-502
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Tidskriftsartikel (refereegranskat)abstract
- The cross section for the reaction dd --> He-4 eta close to threshold is estimated in a two-step model, similar to that which successfully describes near-threshold pd --> He-3 eta production. A pi-meson, created in a dp --> He-3 pi(0) process on one nucle
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| 10. |
- FALDT, Goran, et al.
(författare)
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THE REACTION PD-]HE-3-ETA NEAR-THRESHOLD
- 1995
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Ingår i: NUCLEAR PHYSICS A. - : ELSEVIER SCIENCE BV. - 0375-9474. ; 587:4, s. 769-786
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Tidskriftsartikel (refereegranskat)abstract
- The cross section and deuteron tenser analysing power of the reaction pd-->He-3 eta are studied near threshold in a two-step model, where a pion beam, created in a NN-->d pi reaction on one of the nucleons in the target deuteron, is converted into an eta-
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| 11. |
- FALDT, Goran, et al.
(författare)
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THRESHOLD PRODUCTION OF HEAVY MESONS IN THE PD-](3)HEX(0) REACTION
- 1995
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Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 354:1-2, s. 20-23
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Tidskriftsartikel (refereegranskat)abstract
- The threshold production rates for isoscalar mesons X(0) formed through the pd --> (3)HeX(0) reaction are estimated in a two-step model. A virtual pion beam, produced in an NN --> d pi reaction on one of the nucleons in the target deuteron, is converted i
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| 12. |
- Gardestig, Anders, et al.
(författare)
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An explanation of the ABC enhancement in the dd ->alpha X reaction at intermediate energies
- 1998
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Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 421:1-4, s. 41-45
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Tidskriftsartikel (refereegranskat)abstract
- The dd --> alpha X reaction is studied in a model where each pair of nucleons in the projectile and target deuterons undergoes pion production through the NN --> d pi reaction. The condition that the two deuterons fuse to form an alpha-particle then leads
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| 13. |
- Gardestig, Anders, et al.
(författare)
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Structure in two-pion production in the dd ->alpha X reaction
- 1999
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Ingår i: PHYSICAL REVIEW C-NUCLEAR PHYSICS. - : AMERICAN PHYSICAL SOC. - 0556-2813. ; 59:5, s. 2608-2618
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Tidskriftsartikel (refereegranskat)abstract
- A model for the dd-->alpha pi pi reaction, based an two parallel NN-->d pi reactions, is extended to incorporate a complete set of input amplitudes. While low-energy cross sections are underestimated, the rich structure observed in the alpha-particle mome
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| 14. |
- Hibou, F, et al.
(författare)
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Comparison of eta and eta ' production in the pp -> pp eta(eta ') reactions near threshold
- 1998
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Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 438:1-2, s. 41-46
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Tidskriftsartikel (refereegranskat)abstract
- The total cross section of the pp --> pp eta' reaction has been measured at two energies near threshold by detecting the final protons in a magnetic spectrometer. The values obtained are about a factor of 70 less than for the corresponding eta production,
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| 15. |
- Johansson, R, et al.
(författare)
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Measurement of the exclusive D(p,e(+)e(-))He-3 and D(p,gamma)He-3 reactions at 98 and 176 MeV
- 1998
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Ingår i: NUCLEAR PHYSICS A. - : ELSEVIER SCIENCE BV. - 0375-9474. ; 641:4, s. 389-400
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Tidskriftsartikel (refereegranskat)abstract
- A high resolution magnetic pair spectrometer for medium energy photons has been used for studies of the exclusive (p,e(+)e(-)) and (p, gamma) reactions on deuterium at 98 and 176 MeV. The (p, e(+)e(-)) cross sections, obtained at 40 degrees and 80 degrees
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| 16. |
- Wurzinger, R, et al.
(författare)
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Study of the ABC enhancement in the dd ->alpha X-0 reaction
- 1999
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Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 445:3-4, s. 423-427
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Tidskriftsartikel (refereegranskat)abstract
- The dd --> alpha X0 reaction at beam energies close to the eta threshold shows very strong structure in the missing mass corresponding to the ABC enhancement. The deuteron tensor analysing power Ayy, and the slope of the v
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