A new fit of the parameters for Cabibbo's theory

Eisele, F.; Engelmann, R.; Filthuth, H.; Föhlisch, W.; Hepp, V.; Leitner, E.; Presser, W.; Schneider, H.; Zech, G.

doi:10.1007/bf01395018

Cited by 15 publications

(3 citation statements)

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“…(2) are the same as in [21 and [3]. Both experimental and theoretical information on the general behaviour of the forro factors indicate that they ate slowly varying functions of q2.…”

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confidence: 48%

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Remarks on “a new fit of the parameters for Cabibbo’s theory”

Frenkel

Hasenfratz

1972

Acta Physica

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Some of the theoretical uncertainties inherent in the theory of weak interactions and their possible influence on the fitted value of the Cabibbo angle ate discussed. Special attention is given to the problem of the q2-dependence of the form factors.At presentan intensive experimental study of the semileptonic decays of the baryon octet is in progress in several laboratories. At the XVth International Conference on High Energy Physies the results of "A New Fit of the Parameters for Cabibbo's Theory" has been presented [1]. The value of the Cabibbo angle in the case of a one-angle fit 0 = 0 v = 0A turned out to bei.e. the relative statistical error is smaller than 2 ~/o. The mean value depends, however, on many approximations which ate introduced in order to arrive at working formulas with a reasonable number of free parameters. In the present paper we would like to make some remarks coneerning these approxim ations.One of the sources of the theoretical uncertainty is the q2-dependenee of ~C B--* B" [ -2 ~

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“…(2) are the same as in [21 and [3]. Both experimental and theoretical information on the general behaviour of the forro factors indicate that they ate slowly varying functions of q2.…”

mentioning

confidence: 48%

“…I-Iowever, from a theoretical point of view the question of the q2-dependence is of outmost importance, and this is why we think that it is worthy to diseuss some problematie features of the method of the calculation of the slopes, adopted in [1]. This method has beca deseribed in [2] and [3].The veetor form factor f~-"B'(q ~) is written in the forro…”

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confidence: 99%

Remarks on “a new fit of the parameters for Cabibbo’s theory”

Frenkel

Hasenfratz

1972

Acta Physica

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“…(3.185b) We therefore have a fit to all available semileptonic baryon decays in terms of four parameters 05, e+, F"(O), D"(0). T h e latest fit was done by Eisele et al (1969) who actually used the (known) q2-dependence of the vector form factors, as well as retaining the induced pseudoscalar form factor and making reasonable assumptions about the axial vector form factors. They found (3.189)…”

Section: C+divlmentioning

confidence: 99%