All SM Particles:Area of circle oc Particle-MassOnly Top, W/Z and Higgs stand out !GenerationIⅡⅡWuCZdhbSVe7gOYeLSpinV2Spin 1Spin 0FermionsGaugeBosonsHiggs Boson
All SM Particles: Area of circle ∝ Particle-Mass Only Top, W/Z and Higgs stand out !
Puzzlesof StandardModelMassSpectrumAll spin-1/2matterparticleshaveMasses oc Arbitrary Yukawa Couplings:VYfM(Mw= g v/2)V210171013V123MplanckU1001031061091012101510-1210-910-610-31018GeV
All spin-1/2 matter particles have Masses ∝Arbitrary Yukawa Couplings: ?? ( Mw = g v/2 )
SM: (Un)Naturalness of Matter MassesOnlyTop &Neutrino massesare NaturaladdingRight-handedNeutrinos):V174 GeV,Mt~ 0.01-0.1evmy~~V2MRBut, Why All Other Yukawa's so tiny ??e.g-iHe3 ×10-6≤1Yt
SM: (Un)Naturalness of Matter Masses • Only Top & Neutrino masses are Natural (adding Right-handed Neutrinos): • But, Why All Other Yukawa’s so tiny ?? e.g
It is often said that LHC is just to finda light fundamental Higgs Boson.BUT, this is a quite misleading statement 1. Higgs Boson may be heavy2. Higgs may be more than one and charged3.Higgs Boson may be composite4. Higgs Boson mayNot exit at all.5. Smoking-Gun Signals other than Higgs
It is often said that LHC is just to find a light fundamental Higgs Boson. BUT, this is a quite misleading statement － 1. Higgs Boson may be heavy. 2. Higgs may be more than one and charged. 3. Higgs Boson may be composite. 4. Higgs Boson may Not exit at all. 5. Smoking-Gun Signals other than Higgs
See: Gian Giudice (CERN), talk at Tsinghua on 3-28-2010August2009The two best measurements ofLNOARsin? Ow do not agree :A,(P,)R0,b= M= (230-800) GeVeD4AcA(SLD)Ai[SLD] = Mg = (13 - 65) GeV.sin?oleP(Qb)mw"w*Qw(Cs)sin"oms(e'e)NO compelling evidence forsin"ew(vN)g(vN)gR(vN)Light Higgs Boson even in SM !*preliminary10210310Mu[GeV]★ PossibilityofHeavy Higgs orNoHiggsis fully open!
10 The two best measurements of sin2W do not agree : NO compelling evidence for Light Higgs Boson even in SM ! ★ Possibility of Heavy Higgs or No Higgs is fully open ! See: Gian Giudice (CERN), talk at Tsinghua on 3-28-2010