(A/H Higgs Factory, PossibleCP Violation and 6D Cooling

David B. ClineUCLA Center for Advanced AcceleratorPhysics and Particle Beam Lasers, Inc.

AbstractInthepastthedevelopmentoftheproton‐antiprotoncollideratCERN(andFNAL)reliedon6‐Dcoolingofthebeam.WebrieflyrecountthisandthefollowingdiscoveryoftheWandZbosonsasanexampleofwhatweworkedon.Currently,apossiblediscoveryofsimilarmagnitudecouldbemadewithaµ+µ‐collider.Againasinthecollider,6Dbeamcoolingiscrucial.Thecurrentversionoftheµ+µ­colliderwasstartedinDecember1991ataUCLAworkshophelpinNapa,California.Itwasrapidlyrealizedthatsucha�machineisalsoaHiggsbosonfactory.Workshopsinthe1990sconfirmedthisfact.InthecaseofthesupersymmetricAandHHiggsbosonstheinterferenceofthesetwostatesmightbeoneoriginofCPViolationinNature.CPViolationcanleadtoanexcessofmatteroverantimatterinthecurrentuniverse.Again,6Dbeamcoolingisneeded!Weindicatesomeofthepossiblemethodsfor6Dcoolingincludingtheuseofa50Tsolenoid‐agreattechnicalleapforward.

The concept of a muon colliderSchematic concept for amuon collider

Formulas for 6Dcooling of muons

Arguments for a Higgs Factory

A Higgs factory and CP violation at amuon collider A/H Higgs boson

Muon collider Higgs boson factory: h0 Higgs boson mh0 ~ 120 GeV

Comparison of µ+µ- and e+e- production

A/H Higgs bosons

A and H Higgsbosons haveopposite CP states

The interferencebetween A and Hcan cause CPviolation

A/H Higgs boson factory to observe CP violation

6D Cooling for muon colliders

Emittance required for muon collider

R. Palmer et al, PBL

Early massbb

Summary

Intherecenthistoryofelementaryparticlephysicsthecoolingofabeamto6D(momentumandangle)hasbeenveryimportantforthediscoveryofthew/zbosonsatCERNandthetopquarkatFNAL.Withtheadventofthemuoncolliderconcept,6Dcoolingwillbecomecrucialagain.Todevelopimportantdiscoveriessuchasthepropertiesoftheh0Higgsbosons(theoriginofmass)andCPviolation(thepossibleoriginoflargeamountsofmatterintheuniversecomparedtoantimatter)couldbestudied.TheHiggsfactorywouldproducethelargestnumberintheworld.ThemuoncolliderHiggsfactoriescouldbeamajorbreakthrough.Wehaveshownoneformof6Dmuoncoolingthatusesa50Teslamagnet(thelargestfieldsofar)beingstudiedbythecompanyParticleBeamLasersInc.andBrookhavenNationalLabs.