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The possibility that both the mass and the width of the W boson can be measured by the Jacobian peak in the transverse mass distribution is proposed and examined.

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The production of lepton tridents by neutrinos in a Coulomb field i s a sensitive test of the diagonal t e r m s in weak-interaction theory. If a charged vector boson exists then it can participate in such reactions as a virtual particle o r a real one if the incident beam energy i s sufficiently high. A neutral vector boson with no magnetic moment cannot interact with the electromagnetic field; s o it participates only a s a virtual particle. We examine in this paper two different effects due to these bosons. F i r s t that they have different effective couplings which modify the V-A interaction to a more general combination of vector and axial-vector currents. At this level changes in the over-all coupling strength a r e more important than retaining effects due to the virtual-boson propagators. The recent model of Weinberg belongs to this classification. Second, we investigate the propagator effect of a charged vector boson mediating the usual V -A theory.

We discuss the high-energy production of muon and pion pairs in e +e -colliding beams. All important diagrams in order a%re included. The total cross section is obtained through seven-dimensional numerical integration using a convenient set of mapped covariant variables. Some distributions are given which are relevant for both current and future colliding-beam facilities.

Breach, New York, 1969) .I Each vertical line represents a large spacing in rapidity. Inessential labels can be dropped without confusion. Thus (a:cIb) becomes (a:c) when particle b i s understood to remain fixed. For the sake of brevity, the 317 will often be deleted in various relations, but the relations a r e always for the amplitudes o r the asymptotic amplitudes.I~h e terminology stems from the analog in atomic physics to ionization. It would perhaps be better to call it hadronization. It i s awkward to speak of the pionization of the proton, but even more s o to talk about the antiomega-minus-ization, 8~t i s common practice to define the pionization limit a s sm for fixed p, and fixedpll . This corresponds to It l/Js and lul/Js fixed. The beauty of Mueller's analysis i s that the result, Eq. (9), i s valid more generally, that i s , no matter how E, /Js tends to zero. Moreover, to the extent the Regge-pole description i s valid, the dependence onpll i s determined explicitly by the secondary trajectori e s in Eq. (3). See H. D. I. Abarbanel, Phys. Rev. D 3, 2227 (1971). $M. Holder et d., Phys. Letters X B , 355 (1971). 'OM.-S.Chen etd., Phys. Rev. Letters 2, 1585 (1971).