TY  - JOUR
AU  - Pich, A.
AU  - Rosell, I.
AU  - Santos, J.
AU  - Sanz-Cillero, J. J.
PY  - 2017
DA  - 2017//
TI  - Fingerprints of heavy scales in electroweak effective Lagrangians
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 012
EP  - 60pp
VL  - 04
IS  - 4
PB  - Springer
KW  - Beyond Standard Model
KW  - Chiral Lagrangians
KW  - Higgs Physics
KW  - Technicolor and Composite Models
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) circle times 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.
SN  - 1029-8479
UR  - http://arxiv.org/abs/1609.06659
UR  - https://doi.org/10.1007/JHEP04(2017)012
DO  - 10.1007/JHEP04(2017)012
LA  - English
N1  - WOS:000398449400004
ID  - Pich_etal2017
ER  -