RT Journal Article
T1 Fingerprints of heavy scales in electroweak effective Lagrangians
A1 Pich, Antonio
A1 Rosell, Ignasi
A1 Santos, Joaquín
A1 Sanz Cillero, Juan José
AB The couplings of the electroweak effective theory contain information on the heavy-mass scales which are no-longer present in the low-energy Lagrangian. We build a general effective Lagrangian, implementing the electroweak chiral symmetry breaking SU(2) L ⊗ SU(2) R → SU(2) L+R , which couples the known particle fields to heavier states with bosonic quantum numbers J P = 0± and 1±. We consider colour-singlet heavy fields that are in singlet or triplet representations of the electroweak group. Integrating out these heavy scales, we analyze the pattern of low-energy couplings among the light fields which are generated by the massive states. We adopt a generic non-linear realization of the electroweak symmetry breaking with a singlet Higgs, without making any assumption about its possible doublet structure. Special attention is given to the different possible descriptions of massive spin-1 fields and the differences arising from naive implementations of these formalisms, showing their full equivalence once a proper short-distance behaviour is required.
PB Springer
SN 1029-8479
YR 2017
FD 2017-04-04
LK https://hdl.handle.net/20.500.14352/19388
UL https://hdl.handle.net/20.500.14352/19388
LA eng
NO Ministerio de Ciencia e Innovación (MICINN)/FEDER
NO Centro de Excelencia Severo Ochoa
NO Generalitat Valenciana
NO Universidad CEU Cardenal Herrera/Banco Santander
DS Docta Complutense
RD 6 abr 2025