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New limits on light scalar and pseudoscalar particles produced in nuclear decay

Savage, M. J. and Filippone, B. W. and Mitchell, L. W. (1988) New limits on light scalar and pseudoscalar particles produced in nuclear decay. Physical Review D, 37 (5). pp. 1134-1142. ISSN 0031-9007. doi:10.1103/PhysRevD.37.1134.

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We present the results of a search for scalar and pseudoscalar particles produced in nuclear deexcitation. Measurements of the angular correlation of e+e- pairs emitted from excited states of 14N, 16O, and 8Be provided sensitivity to particles with lifetimes 10^-19 < τ < 10^-11 s within the mass range 2me < MX < 5 MeV. We find no evidence for such particles and set upper limits on the branching ratio to electromagnetic decay.

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Filippone, B. W.0000-0002-2618-2688
Additional Information:©1988 The American Physical Society Received 28 August 1987 We wish to thank R.W. Kavanagh and C.A. Barnes for many useful discussions, Wil Schick for his skill and patience at machining the target chamber and parts of the experimental apparatus, and Hahns Grau for his expertise in construction of the hodoscope. We acknowledge support from NSF Grant No. PHY85-05682 and DOE Grant No. DE-AS03-81ER40002. M.J.S. acknowledges the financial support of the New Zealand University Grants Commission.
Issue or Number:5
Record Number:CaltechAUTHORS:SAVprl88
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ID Code:6953
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Deposited On:03 Jan 2007
Last Modified:08 Nov 2021 20:38

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