Results 121 to 130 of about 4,206 (182)

Going beyond Top EFT

Journal of High Energy Physics
We present a new way to interpret Top Standard Model measurements going beyond the SMEFT framework. Instead of the usual paradigm in Top EFT, where the main effects come from tails in momenta distributions, we propose an interpretation in terms of new ...
André Lessa, Verónica Sanz
doaj   +1 more source

Impact of dimension-eight SMEFT contributions: A case study [PDF]

, 2021
S. Dawson, Samuel Homiller, M. Sullivan
openalex   +1 more source

Aligned yet large dipoles: a SMEFT study

Journal of High Energy Physics
Abstract We study a non-universal flavor scenario at the level of the Standard Model Effective Field Theory, according to which the matrix of Wilson coefficients c uW of an up-type electroweak quark dipole operator is aligned with the up-type Yukawa coupling. Such an alignment usually follows
Quentin Bonnefoy, Jonathan Kley, Di Liu, Alejo N. Rossia, Chang-Yuan Yao   +4 more
openaire   +7 more sources

Exact SMEFT formulation and expansion to $$ \mathcal{O} $$(v4/Λ4) [PDF]

, 2020
Chris Hays, Andreas Helset, Adam Martin, Michael Trott   +3 more
openalex   +1 more source

Future collider sensitivities to νSMEFT interactions

Journal of Physics G: Nuclear and Particle Physics
Abstract The discovery of neutrino oscillations and masses provides strong motivation to extend the Standard Model by including right-handed neutrinos, which lead to heavy neutrino states that could exist at the electroweak scale. These states may also be influenced by new high-scale, weakly interacting physics.
Lucía Duarte, Daniel Chalençon Maisian, Tomás Urruzola   +2 more
openaire   +2 more sources

Missing energy plus jet in the SMEFT

Journal of High Energy Physics
Abstract We study the production of dineutrinos in proton-proton collisions, with large missing transverse energy and an energetic jet as the experimental signature. Recasting a search from the ATLAS collaboration we work out constraints on semileptonic four-fermion operators, gluon and electroweak dipole operators and Z-penguins ...
Gudrun Hiller, Daniel Wendler
openaire   +3 more sources

SMEFT Corrections to $Z$ Boson Decays

, 2018
We compute the one-loop corrections to $Z$ decay properties from dimension-6 operators in the Standard Model Effective Field Theory (SMEFT) that contribute also to anomalous 3-gauge boson couplings and examine the relative sensitivity of the two processes to the anomalous couplings.
Dawson, Sally, Ismail, Ahmed
openaire   +2 more sources

Mapping between γ 5 schemes in the Standard Model Effective Field Theory

Journal of High Energy Physics
We explore the relation between two distinct prescriptions for γ 5 in dimensional regularization — the Breitenlohner Maison t’Hooft Veltman (BMHV) scheme and Naive Dimensional Regularisation (NDR).
S. Di Noi, R. Gröber, P. Olgoso
doaj   +1 more source

Beyond SMEFT with $b \to c \,τ^- {\barν}$ [PDF]

, 2021
C. P. Burgess, Serge Hamoudou, Jacky Kumar, David London   +3 more
openalex   +1 more source

Total Drell–Yan in the flavorful SMEFT

The European Physical Journal C
Abstract We perform a global analysis of Drell–Yan production of charged leptons and dineutrinos, the latter in missing energy plus jet events, in proton–proton collisions within the Standard Model Effective Field Theory (SMEFT). The combination allows for the removal of flat directions, sharper limits and to probe more couplings than the ...
Gudrun Hiller, Lara Nollen, Daniel Wendler   +2 more
openaire   +3 more sources