Unification without supersymmetry R. Frezzotti a)b) , M. Garofalo c ) , G.C. Rossi a)b)d ) a) Dipartimento di Fisica - Università di Roma Tor Vergata b) INFN - Sezione di Roma Tor Vergata c) University of Edinburgh d ) Centro Fermi Frezzotti, Rossi Phys. Rev. D 92 (2015) 5, 054505 Frezzotti, Garofalo, Rossi [arXiv:1602.03684] to be published in PRD May 24, 2016 Frezzotti Garofalo Rossi (ToV- Edinburgh) Gauge coupling nification May 24, 2016 1 / 18
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Unification without supersymmetry - Agenda (Indico) · 2016. 5. 25. · Frezzotti, RossiPhys. Rev. D 92 (2015) 5, 054505 Frezzotti, Garofalo, Rossi[arXiv:1602.03684] to be published
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Unification without supersymmetry
R. Frezzottia)b), M. Garofaloc), G.C. Rossia)b)d)
a)Dipartimento di Fisica - Università di Roma Tor Vergatab)INFN - Sezione di Roma Tor Vergata
c)University of Edinburghd)Centro Fermi
Frezzotti, Rossi Phys. Rev. D 92 (2015) 5, 054505Frezzotti, Garofalo, Rossi [arXiv:1602.03684] to be published in PRD
expose a non-Susy model with a level of unification as in MSSM2 The model
SM matter + superstrongly interacting extra matter→a kind of BSMM with
NP generation of all elementary particle massesnatural mass hierarchy
3 Unificationstrong & electro-weak coupling unification owing to
new matter (superstrongly interacting quarks and leptons)with unusual hypercharge assignment (half-integer charges)
superstrong, strong & electro-weak coupling unification owing tofurther extra fermions endowed with only superstrong interactionsand masses around the unification scale ΛGUT
4 Conclusions & Outlooklattice checks of the NP mass generation mechanismlook for a GUT group
Figure : Running of electro-weak and strong couplings in SM (black dottedlines) and MSSM. Displacement of blue and red curves at small scales isassociated to the opening of the SUSY threshold, either 0.5 TeV (bluecurve) or 1.5 TeV (red curve) with initial conditions αs(mZ ) = 0.117 andαs(mZ ) = 0.121, respectively.
Figure : The 1-loop running of electro-weak and strong couplings in theBSMM (red curves) and in the SM (black curves). The visible change ofslope of red curves at “low” scales is associated with the opening of thesuperstrong threshold that we take at ΛT = 5 TeV
Figure : The 1-loop running of electro-weak and strong couplings in theBSMM (red curves) and in the MSSM (blue curves). The superstrong andsupersymmetry thresholds have been set at ΛT = 5 and ΛMSSM = 1 TeV,respectively
Figure : The 1-loop running of electro-weak and strong couplings in theBSMM with the hyperchage assignment of Table 2 (red curves) and the“standard” hyperchage assignment of Table 1 (green curve)
Figure : The 1-loop running of electro-weak strong and superstrongcouplings in the BSMM with NS extra particles having purely superstrongvector interactions and masses O(ΛGUT ). NS = 4 (blue line) NS = 5 (blackline), NS = 6 (green line)
A non-SUSY BSMM model with unification at the level of MSSMThe salient features of the BSMM outlined in slide 5 are
elementary particle masses generated by a NP mechanismtriggered by irrelevant d = 6 chiral breaking op’s in L → no Higgsa neat solution of “naturalness” & “hierarchy” problems
at the price of giving up a bit of universalitycorrect order of magnitude of the NP-ly generated top mass =⇒
SIPs with an RGI scale ΛT � ΛQCD , ΛT ∼ O(TeV)SIPs (must) have unusual hypercharge assignments
electric charge quantized in units of e/2.neutral SIP bound states with non-zero fermion number→ CDM?
125 resonance is a WW/ZZ state bound by superstrong forces
TM
QT
+ . . . =⇒ + . . . =⇒ h
(a) (b) (c)
Existence of NP effects needs a numerical confirmation