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- W2164491375 abstract "_...5..CJPp 93/18 June 1993 -OJ c.~ rr' c: . :0 r ):;. .....a. :r If ~ C :~ ~. , .,, Operating the planned linear colliders of the next generation in an e-e(instead of e+e-) configuration opens up the possibility of observing the production of W-W pairs, mediated by heavy Majorana neutrino exchange. We estimate rates for a reasonable scenario of masses and mixing angles, and point out that, for massless light neutrinos, this may be the only practical way to check the Majorana us. Dirac character of neutrinos with heavy (~ 1 TeV) Majorana masses. Invited talk at the Rencontre de Physique de la Vallee d'Aoste, La Thuile, Italy. March 7-14, 1993. 1) e-ecapabilities of e+e-colliders. It has become increasingly clear that for the next generation of particle accelerators, hadron coUiders will not be likely to cover the full spectrum of discoveries we expect both within and beyond the Standard Model. Rather, a well defined subset of physics topics may well find itself best and most promisingly investigated in e+ecollisions beyond the reach of SLC, LEP, and even LEP2. For these pursuits, electrons and positrons will be accelerated in linear configurations; while there is no machine concept in the state of maturity that would make a proposal to build such a device possible at this time, there is little doubt that colliders consisting of two linear accelerators with E = 0.25 0.5 TeV each can be built with available or clearly impending technology. In fact, several realistic schemes are being pursued in various laboratories}), and luminosities on the order of 1033 to 1034 cm-2 sec-1 appear reasonably attainable. It is a quirk of particle physics history that in the long and utterly successful sequence of particle collisions using storage rings, only the first generation used electrons for both incoming beams. Not since the initial QED tests of the Princeton Stanford project2) has there been a serious discussion of e-ecolliders. In today 's address, I will show that among a number of desirable and possible tests of our present-day view of particle interactions, the vitally important search for massive neutrinos will be enormously helped by the implementation of an electron-electron version of the Next Linear Collider (NLC) or Teravolt Linear Collider (TLC). e-e collisions permit, in the absence of the annihilation graph that dominates e+e collisions at presently available projects, a nurnber of sensitive studies both within and beyond the Standard Model of particle interactions. To illustrate the main points that affect the notion of installing an e-eoption of an NLC/TLC from the machine side, imagine an arbitrary linear collider schematic (Fig. 1) : clearly the basic optical design does not change, but there are some obvious advantages and disadvantages for the e-econfiguration. r--- F--~---__g...1 I R ..!L--___ e_-____ e+ I I L ___ .J Acc'ring Positron target Fig. 1: Schematic view of an e+eLinear Collider. The interaction region is indicated as LR." @default.
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- W2164491375 date "1993-01-01" @default.
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- W2164491375 title "The Search for heavy majorana neutrinos in linear e- e- colliders" @default.
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