Pretražite po imenu i prezimenu autora, mentora, urednika, prevoditelja

Napredna pretraga

Pregled bibliografske jedinice broj: 397006

Measurement of the neutron-neutron scattering length using the π − d capture reaction


Chen, Q.; Howell, C. R.; Carman, T. S.; Gibbs, W. R.; Gibson, B. F.; Hussein, A.; Kiser, M. R.; Mertens, G.; Moore, C. F.; Morris, C. et al.
Measurement of the neutron-neutron scattering length using the π − d capture reaction // Physical Review C, 77 (2008), 5; 054002-1 doi:10.1103/PhysRevC.77.054002 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 397006 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Measurement of the neutron-neutron scattering length using the π − d capture reaction

Autori
Chen, Q. ; Howell, C. R. ; Carman, T. S. ; Gibbs, W. R. ; Gibson, B. F. ; Hussein, A. ; Kiser, M. R. ; Mertens, G. ; Moore, C. F. ; Morris, C. ; Obst, A. ; Pasyuk, E. ; Roper, C. D. ; Salinas, F. ; Setze, H. R. ; Šlaus, Ivo ; Sterbenz, S. ; Tornow, W. ; Walter, R. L. ; Whiteley, C. R. ; Whitton, M.

Izvornik
Physical Review C (0556-2813) 77 (2008), 5; 054002-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
neutron-neutron scattering; proton-proton scattering

Sažetak
We have determined a value for the 1S0 neutron-neutron scattering length (ann) from high-precision measurements of time-of-flight spectra of neutrons from the 2H(π − , n γ ) n capture reaction. The measurements were done at the Los Alamos Meson Physics Facility by the E1286 Collaboration. The high spatial resolution of our γ -ray detector enabled us tomake a detailed assessment of the systematic uncertainties in our techniques. The value obtained in the present work is ann = − 18.63 ± 0.10 (statistical) ± 0.44 (systematic) ± 0.30 (theoretical) fm. This result is consistent with previous determinations of ann from the π − d capture reaction. We found that the analysis of the data with calculations that use a relativistic phase-space factor gives a more negative value for ann by 0.33 fm over the analysis done using a nonrelativistic phase-space factor. Combining the present result with the previous ones from π − d capture gives ann = − 18.63 ± 0.27(expt) ± 0.30 fm (theory). For the first time the combined statistical and systematic experimental uncertainty in ann is smaller than the theoretical uncertainty and comparable to the uncertainty in the proton-proton 1S0 scattering length (app). This average value of ann when corrected for the magnetic-moment interaction of the two neutrons becomes − 18.9 ± 0.4 fm, which is 1.6 ± 0.5 fm different from the recommended value of app, thereby confirming charge symmetry breaking at the 1% confidence level.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
Art. no. 054002



POVEZANOST RADA


Projekti:
098-0000000-3194 - Nuklearne Interakcije

Ustanove:
Institut "Ruđer Bošković", Zagreb

Profili:

Avatar Url Ivo Šlaus (autor)

Poveznice na cjeloviti tekst rada:

doi scitation.aip.org link.aps.org

Citiraj ovu publikaciju:

Chen, Q.; Howell, C. R.; Carman, T. S.; Gibbs, W. R.; Gibson, B. F.; Hussein, A.; Kiser, M. R.; Mertens, G.; Moore, C. F.; Morris, C. et al.
Measurement of the neutron-neutron scattering length using the π − d capture reaction // Physical Review C, 77 (2008), 5; 054002-1 doi:10.1103/PhysRevC.77.054002 (međunarodna recenzija, članak, znanstveni)
Chen, Q., Howell, C., Carman, T., Gibbs, W., Gibson, B., Hussein, A., Kiser, M., Mertens, G., Moore, C. & Morris, C. (2008) Measurement of the neutron-neutron scattering length using the π − d capture reaction. Physical Review C, 77 (5), 054002-1 doi:10.1103/PhysRevC.77.054002.
@article{article, author = {Chen, Q. and Howell, C. R. and Carman, T. S. and Gibbs, W. R. and Gibson, B. F. and Hussein, A. and Kiser, M. R. and Mertens, G. and Moore, C. F. and Morris, C. and Obst, A. and Pasyuk, E. and Roper, C. D. and Salinas, F. and Setze, H. R. and \v{S}laus, Ivo and Sterbenz, S. and Tornow, W. and Walter, R. L. and Whiteley, C. R. and Whitton, M.}, year = {2008}, pages = {054002-1-054002-19}, DOI = {10.1103/PhysRevC.77.054002}, keywords = {neutron-neutron scattering, proton-proton scattering}, journal = {Physical Review C}, doi = {10.1103/PhysRevC.77.054002}, volume = {77}, number = {5}, issn = {0556-2813}, title = {Measurement of the neutron-neutron scattering length using the π − d capture reaction}, keyword = {neutron-neutron scattering, proton-proton scattering} }
@article{article, author = {Chen, Q. and Howell, C. R. and Carman, T. S. and Gibbs, W. R. and Gibson, B. F. and Hussein, A. and Kiser, M. R. and Mertens, G. and Moore, C. F. and Morris, C. and Obst, A. and Pasyuk, E. and Roper, C. D. and Salinas, F. and Setze, H. R. and \v{S}laus, Ivo and Sterbenz, S. and Tornow, W. and Walter, R. L. and Whiteley, C. R. and Whitton, M.}, year = {2008}, pages = {054002-1-054002-19}, DOI = {10.1103/PhysRevC.77.054002}, keywords = {neutron-neutron scattering, proton-proton scattering}, journal = {Physical Review C}, doi = {10.1103/PhysRevC.77.054002}, volume = {77}, number = {5}, issn = {0556-2813}, title = {Measurement of the neutron-neutron scattering length using the π − d capture reaction}, keyword = {neutron-neutron scattering, proton-proton scattering} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Citati:





    Contrast
    Increase Font
    Decrease Font
    Dyslexic Font