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1、UT-07-42SupersymmetricInflationofDynamicalOriginK.Hamaguchi1,IzawaK.-I.2,andH.Nakajima11DepartmentofPhysics,UniversityofTokyo,Tokyo113-0033,Japan2YukawaInstituteforTheoreticalPhysics,KyotoUniversity,Kyoto606-8502,JapanAbstractDynamicalmodelsofinflationaregivenwithcompositein
2、flatonsbymeansofmassivesupersymmetricgaugetheory.Nearlyflatdirectionsandstablemassiveonesinthepotentialareidentifiedandslow-rollduringinflationisexamined.Thiskindofdynamicalinflationsmaybeubiquitousinfundamentalunifiedtheorywithsupersymmetry,whichshouldcontaingaugetheoriesforint
3、eractionsofelementaryparticles.arXiv:0801.2204v1[hep-ph]15Jan20081IntroductionCosmologicalinflation[1]isexpectedtobeakeyingredienttorealizeourpresentuniverse.Variouspossiblecandidateshavebeenconsideredasoriginsofinflatonfieldsinparticle-physicsmodels.Weaklycoupledfieldssuchasm
4、odulifieldsinsupersymmetricmodelsmaybeplausiblecandidatestoyieldnearlyflatpotentialforslow-rollinflation.Incontrast,stronglycoupledfieldsmightnaivelyseeminappropriatetoachieveflat-nessofthepotentialduetolargedynamicalcorrectionstothepotential.However,ifdynamicalscaleaslargeasfu
5、ndamentalcutoffscale(orgenuinelystrongcoupling)istobeconsidered,1low-energydegreesoffreedommayjustbehaveasweaklycoupledfieldsineffectivetheorydescriptionbelowthecutoffscale,whichweassumetobethereducedPlanckscale,forsimplicity.Inthispaper,wepursuedynamicaloriginofinflatonfieldsby
6、meansofcompositeinflatonmodelsofmassivesupersymmetricgaugetheoryinfourspacetimedimensions.2Althoughthesupergravitycorrectionsareimportantalongwiththoseoriginatedfromthestrongdynamics,weignoretheminthepresentanalysisasthefirststep,anticipatingcancellationamongthem.Weconsidera
7、possibilitythatsuchaninflatonisidentifiedwiththeprimordialone,thoughprimaryinflations[1,4]proceedingtheprimordialonemightbetheappropriatestagefordynamicalinflation.Anyway,inbothcases,thedynamicalinflationmayberelevantforvacuumselectionprocessesintheveryearlyuniverse.2Preliminar
8、ynotesLetusrecapitulateaneffectivetheorydescriptionofsupersymmetricSp(N)gaugetheory[5]with
