Weak radiative decay Λ→nγ and the radiative capture reaction K-p→(1385)γ

K. D. Larson, A. J. Noble, B. Bassalleck, H. Burkhardt, W. J. Fickinger, J. R. Hall, A. L. Hallin, M. D. Hasinoff, D. Horvath, P. G. Jones, J. Lowe, E. K. McIntyre, D. F. Measday, J. P. Miller, B. L. Roberts, D. K. Robinson, M. Sakitt, M. Salomon, S. Stanislaus, C. E. WalthamT. M. Warner, D. A. Whitehouse, D. M. Wolfe

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7 Citations (Scopus)

Abstract

The branching ratio for the Λ weak radiative decay Λ→nγ has been measured. Three statistically independent results from the same experiment (Brookhaven E811) are reported here. They are combined with a previously published measurement, also from Brookhaven E811, to yield a result of (Λ→nγ)(Λ→anything)=(1.750.15) ×10-3, based on 1800 events after background subtraction. This represents a factor of 75 increase in statistics over the previous world total. A comparison with recent theoretical papers shows that no existing model provides a completely satisfactory description of all data on weak radiative decays. A search is also reported for the radiative capture process K-p→(1385)γ at rest. No signal was observed and an upper limit on the branching ratio of [K-p→(1385)γ][K-p→anything]<4×10-4 (90% C.L.) was determined.

Original languageEnglish
Pages (from-to)799-810
Number of pages12
JournalPhysical Review D
Volume47
Issue number3
DOIs
Publication statusPublished - 1993
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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  • Cite this

    Larson, K. D., Noble, A. J., Bassalleck, B., Burkhardt, H., Fickinger, W. J., Hall, J. R., Hallin, A. L., Hasinoff, M. D., Horvath, D., Jones, P. G., Lowe, J., McIntyre, E. K., Measday, D. F., Miller, J. P., Roberts, B. L., Robinson, D. K., Sakitt, M., Salomon, M., Stanislaus, S., ... Wolfe, D. M. (1993). Weak radiative decay Λ→nγ and the radiative capture reaction K-p→(1385)γ. Physical Review D, 47(3), 799-810. https://doi.org/10.1103/PhysRevD.47.799