Experimental study on the τ± decay matrix element

W. T. Ford; P. A. Piroué; R. S. Remmel; A. J S Smith; Paul A Souder

doi:10.1016/0370-2693(72)90260-2

Experimental study on the τ± decay matrix element

W. T. Ford, P. A. Piroué, R. S. Remmel, A. J S Smith, Paul A Souder

Research output: Contribution to journal › Article

18 Citations (Scopus)

Abstract

In a wire spark-chamber experiment the squared matrix element |M|² has been measured for the processes τ^± (K^± → π^±π^±π^∓). Our previous results showed no significant difference between τ⁺ and τ^-. The final results, based on ∼1.5 million τ^± decays, are expressed in the form |M|² ∝ 1 + aY + bX² + cY² + ..., where X and Y are the Dalitz variables. The data are adequately fitted by a quadratic expansion where a = 0.2752 ± 0.0033; b = -0.038 ± 0.009; c = 0.025 ± 0.010. Results are also given for τ⁺ and τ^- separately. Finally we have determined the difference between the Q values of τ⁺ and τ^- to be: Q⁺ - Q^- = -60±55 keV.

Original language	English (US)
Pages (from-to)	335-338
Number of pages	4
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	38
Issue number	5
DOIs	https://doi.org/10.1016/0370-2693(72)90260-2
State	Published - Mar 6 1972
Externally published	Yes

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spark chambers

wire

expansion

decay

matrices

ASJC Scopus subject areas

Nuclear and High Energy Physics

Cite this

Ford, W. T., Piroué, P. A., Remmel, R. S., Smith, A. J. S., & Souder, P. A. (1972). Experimental study on the τ± decay matrix element. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 38(5), 335-338. https://doi.org/10.1016/0370-2693(72)90260-2

Experimental study on the τ± decay matrix element. / Ford, W. T.; Piroué, P. A.; Remmel, R. S.; Smith, A. J S; Souder, Paul A.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 38, No. 5, 06.03.1972, p. 335-338.

Research output: Contribution to journal › Article

Ford, WT, Piroué, PA, Remmel, RS, Smith, AJS & Souder, PA 1972, 'Experimental study on the τ± decay matrix element', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 38, no. 5, pp. 335-338. https://doi.org/10.1016/0370-2693(72)90260-2

Ford WT, Piroué PA, Remmel RS, Smith AJS, Souder PA. Experimental study on the τ± decay matrix element. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 1972 Mar 6;38(5):335-338. https://doi.org/10.1016/0370-2693(72)90260-2

Ford, W. T. ; Piroué, P. A. ; Remmel, R. S. ; Smith, A. J S ; Souder, Paul A. / Experimental study on the τ± decay matrix element. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 1972 ; Vol. 38, No. 5. pp. 335-338.

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10.1016/0370-2693(72)90260-2