Precision Measurements of the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>K</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math></span> and <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>Σ</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math></span> Masses

K. P. Gall; E. Austin; J. P. Miller; F. O'Brien; B. L. Roberts; D. R. Tieger; G. W. Dodson; M. Eckhause; J. Ginkel; P. P. Guss; D. W. Hertzog; D. Joyce; J. R. Kane; C. Kenney; J. Kraiman; W. C. Phillips; W. F. Vulcan; R. E. Welsh; R. J. Whyley; R. G. Winter; R. J. Powers; R. B. Sutton; A. R. Kunselman

doi:10.1103/PhysRevLett.60.186

Precision Measurements of the $K^{-}$ and $Σ^{-}$ Masses

K. P. Gall, E. Austin, J. P. Miller, F. O'Brien, B. L. Roberts, D. R. Tieger, G. W. Dodson, M. Eckhause, J. Ginkel, P. P. Guss, D. W. Hertzog, D. Joyce, J. R. Kane, C. Kenney, J. Kraiman, W. C. Phillips, W. F. Vulcan, R. E. Welsh, R. J. Whyley, R. G. Winter, R. J. Powers, R. B. Sutton, and A. R. Kunselman

Phys. Rev. Lett. 60, 186 – Published 18 January 1988

Abstract

The masses of the $K^{-}$ and $Σ^{-}$ have been measured by use of exotic-atom x-ray transitions in Pb and W. The transitions used were free from contaminant nuclear $γ$ rays and strong-interaction effects. Two $K^{-}$ transitions and three $Σ^{-}$ transitions for each target satisfied these criteria. The results are $M_{K^{-}} = 493.636 \pm 0.011$ MeV and $M_{Σ^{-}} = 1197.532 \pm 0.057$ MeV. The precision of these measurements is greater than that of any previous experiment. When combined with previous measurements they form a consistent set.

Received 13 August 1987

DOI:https://doi.org/10.1103/PhysRevLett.60.186

Authors & Affiliations

K. P. Gall, E. Austin, J. P. Miller, F. O'Brien^*, B. L. Roberts, and D. R. Tieger^†

Boston University, Boston, Massachusetts 02215

G. W. Dodson^†

Boston University, Boston, Massachusetts 02215
Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

M. Eckhause, J. Ginkel, P. P. Guss^‡, D. W. Hertzog^§, D. Joyce, J. R. Kane, C. Kenney, J. Kraiman, W. C. Phillips, W. F. Vulcan, R. E. Welsh, R. J. Whyley, and R. G. Winter

College of William and Mary, Williamsburg, Virginia 23185

R. J. Powers^∥

California Institute of Technology, Pasadena, California 91125

R. B. Sutton

Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213

A. R. Kunselman

University of Wyoming, Laramie, Wyoming 82071

^*Present address: AT&T Bell Laboratories, Whippany, NJ 07981.
^†Present address: Massachusetts Institute of Technology Laboratory for Nuclear Science, Cambridge, MA 02139.
^‡Present address: EG&G Energy Measurements, Box 380, Suitland, MD 20746.
^§Present address: Department of Physics, University of Illinois, Urbana, IL 61801.
^∥Present address: Institut für Physik der Universität Basel, CH-Basel 4056, Switzerland.