8th General Meeting of the LHC EFT Working Group

Session

Area 1

2 Dec 2024, 15:50

4/3-006 - TH Conference Room (CERN)

Conveners

Area 1

• David Sutherland

Area 1

• David Sutherland

19. Quantifying EFT Truncation Uncertainties at the LHC

Markus Luty (University of California Davis), Markus Luty

02/12/2024, 15:50

20. Discussion on truncation

02/12/2024, 16:10

11. SMEFT predictions for semileptonic processes

Siddhartha Karmakar (Tata Institute of Fundamental Research)

02/12/2024, 16:55

The $SU(2)_L\times U(1)_Y$ invariance of the Standard Model Effective Field Theory (SMEFT) predicts multiple restrictions in the space of Wilson coefficients of $U(1)_{em}$ invariant effective lagrangians such as the Low-energy Effective Field Theory (LEFT), used for low-energy flavor-physics observables, or the Higgs Effective Field Theory (HEFT) in unitary gauge, appropriate for...

12. Towards the HEFT-hedron: the complete set of positivity constraints on HEFT operators at NLO

Debsubhra Chakraborty

02/12/2024, 17:15

We present the complete set of positivity bounds on the Higgs Effective Field Theory (HEFT) at next-to-leading order. We identify the 15 operators that can be constrained by positivity, as they contribute to $s^2$-growth in the amplitude for longitudinal gauge-Higgs scattering, that is to the $VV \to VV$, $hh$, $Vh$, and $hh \to VV$, $Vh$ processes, where $V = W^\pm, Z$, $h$ is the observed...

3. Evanescent operators at the one-loop level

Jason Aebischer (CERN)

02/12/2024, 17:35

I will discuss general basis transformations in Effective Field theories at the tree- and one-loop level. To this end, the notion of Evanescent operators and their formulation in terms of one-loop Fierz transformations will be introduced. To illustrate the usefulness of this approach several examples will be discussed, including scheme factorization. Comments on Evanescence free...

18. On the SMEFT basis for Anomalous Quartic Gauge Couplings

Nicholas Llewellyn Rodd (School of Physics-University of Melbourne-Unknown), Nicholas Llewellyn Rodd (CERN), Nicholas Rodd

02/12/2024, 17:55