No abstract

We dlscuss the symmetrj-break~ng pitterns aiiJ the natl~mlnes, of pdrlty conservation In weak neuiralcurrent lriteractlons In the lett-nght-symmetric SU(2), e SIJ(2), @ lJ(1) gauge theones Two H~ggs systems are dlscussed whrch enablz us to ach~eve the desired break~ng of the gduge symmetry We show by a detatled analyszs of the H~ggs potentla1 that the more econom~cal of tht tvo H~ggs system>, that lnvolvlng left and r~ght H~ggs scalar doublets, falls to meet the cnteria of r~aturalness of par~ty conservatlon In neutral-cvrrent lnteractlons We find that with the second EI~ggs system neutral crlrrcnts conserve parlty r~aturally regardless of the structure of the phys~cal charged-current weak Interactions Impllcat~ons of thls foi the computab~l~t> of lnduced parlty v~olat~on In lugher orders and the s t d r~h for par~ty noncon~ervatlon I n atoms are alno dlscussed

-This paper proposes a new multicast protocol for Mobile Ad Hoc networks, called the Multicast routing protocol based on Zone Routing (MZR). MZR is a source-initiated ondemand protocol, in which a multicast delivery tree is created using a concept called the zone routing mechanism. It is a source tree based protocol and does not depend on any underlying unicast protocol. The protocol's reaction to topological changes can be restricted to a node's neighborhood instead of propagating it throughout the network. A detailed simulation and performance analysis of MZR is presented in this paper.

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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).