Naslov
Role of Higher Fermion Representations in TeV-scale Seesaw (Uloga fermiona viših reprezentacija na TeV-sku njihalicu)
(Role of Higher Fermion Representations in TeV-scale Seesaw)

Autori
Picek, Ivica ; Radovčić, Branimir

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni

Skup
BUE, CTP International Conference on Neutrino Physics in the LHC Era

Mjesto i datum
Luksor, Egipat, 15.11.2009. - 19.11.2009

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
vectorlike fermions; TeV-scale seesaw; weak 5-plets (vektorski fermioni; TeV-ska njihalica; 5 pleti slabog izospina
(vectorlike fermions; TeV-scale seesaw; weak 5-plets)

Sažetak
We consider a scenario in which additional vectorlike TeV-scale fermions belonging to higher weak-isospin multiplets provide new seesaw mediators. If these fermions have non-zero hypercharge, their tree-level exchange produces novel seesaw mechanism different from type I and III seesaw. In order to produce Majorana masses for light neutrinos, new Dirac seesaw mediators are constrained by the SM gauge symmetry to belong to a weak triplet and a five-plet. The latter, in conjunction with two isospin 3/2 scalar multiplets, leads to new seesaw formula m_\nu ~ v^6/M^5. It reproduces the empirical masses m_\nu ~ 10^{;-1}; eV by M < TeV new states, testable at the LHC

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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