Results 71 to 80 of about 3,754 (159)

Higher dimensional operators in 2HDM

, 2017
We present a complete (non-redundant) basis of CP- and flavour-conserving six-dimensional operators in a two Higgs doublet model (2HDM). We include Z_2-violating operators as well.
Karmakar, Siddhartha, Rakshit, Subhendu
core   +1 more source

The Standard Model as an Effective Field Theory [PDF]

, 2018
Projecting measurements of the interactions of the known Standard Model (SM) states into an effective field theory (EFT) framework is an important goal of the LHC physics program.
Brivio, Ilaria, Trott, Michael
core   +2 more sources

Improving the global SMEFT picture with bounds on neutrino NSI

Journal of High Energy Physics
We analyze how neutrino oscillation and coherent elastic neutrino-nucleus scattering data impact the global SMEFT fit. We first review the mapping between the SMEFT parameters and the so-called NSI framework, commonly considered in the neutrino ...
Pilar Coloma, Enrique Fernández-Martínez, Jacobo López-Pavón, Xabier Marcano, Daniel Naredo-Tuero, Salvador Urrea   +5 more
doaj   +1 more source

Gauge-invariant implications of the LHCb measurements on Lepton-Flavour Non-Universality

, 2017
We study the implications of the recent measurements of $R_K$ and $R_{K^*}$ by the LHCb collaboration. We do that by adopting a model-independent approach based on the Standard Model Effective Field Theory (SMEFT), in which the dominant new physics ...
Celis, Alejandro, Fuentes-Martin, Javier, Vicente, Avelino, Virto, Javier   +3 more
core   +1 more source

A $$ {\mathbbm{CP}}^2 $$ SMEFT

Journal of High Energy Physics
Abstract An extension of the Standard Model is proposed, where the Higgs field is valued in the complex projective plane $$ {\mathbbm{CP}}^2 $$ CP 2 , rather than
openaire   +4 more sources

A framework for simultaneous fit of QCD and BSM parameters with xFitter

European Physical Journal C: Particles and Fields
An extension of the xFitter open-source program for QCD analyses is presented, allowing for a polynomial parameterization of the dependence of physical observables on theoretical parameters.
Xiao-Min Shen, Simone Amoroso, Jun Gao, Katerina Lipka, Oleksandr Zenaiev   +4 more
doaj   +1 more source

Complete One-Loop Matching for a Singlet Scalar in the Standard Model EFT [PDF]

, 2018
We present the results of the first complete one-loop matching calculation between the real singlet scalar extension of the Standard Model and the Standard Model effective field theory (SMEFT) at dimension six.
Craig, Nathaniel, Jiang, Minyuan, Li, Ying-Ying, Sutherland, Dave   +3 more
core   +2 more sources

$b\to c\tau\nu$ Transitions in the Standard Model Effective Field Theory

, 2019
The $R(D^{(\ast)})$ anomalies observed in $B\to D^{(\ast)}\tau\nu$ decays have attracted much attention in recent years. In this paper, we study the $B\to D^{(\ast)}\tau\nu$, $\Lambda_b\to\Lambda_c\tau\nu$, $B_c\to (J/\psi,\,\eta_c)\tau\nu$, $B\to X_c ...
Hu, Quan-Yi, Li, Xin-Qiang, Yang, Ya-Dong   +2 more
core   +1 more source

Use and reuse of SMEFT

, 2020
In this work we address three questions: can we successfully describe (observed) deviations from the standard model in the SMEFT language? Can we learn something about the underlying, beyond the standard model, physics using the SMEFT language? If no deviation is observed, how to proceed?
David, André, Passarino, Giampiero
openaire   +2 more sources

Can New Physics hide inside the proton? [PDF]

, 2019
Modern global analyses of the structure of the proton include collider measurements which probe energies well above the electroweak scale. While these provide powerful constraints on the parton distribution functions (PDFs), they are also sensitive to ...
Carrazza, Stefano, Degrande, Celine, Iranipour, Shayan, Rojo, Juan, Ubiali, Maria   +4 more
core   +3 more sources