LoopFest XXIV

Session

Parallel Session b

27 May 2026, 16:00

Physics Department (Bldg 510), Small Seminar Room

Conveners

Parallel Session b

• Ayres Freitas (University of Pittsburgh)

Presentation materials

Bartocci_LoopFest.pdf

46. Including Dimension-8 Effects in SMEFT: Renormalization, and Phenomenology

Supratim Das Bakshi (Argonne National Laboratory)

27/05/2026, 16:00

Recent studies in the Standard Model Effective Field Theory (SMEFT) highlight the importance of consistently retaining terms of order O(1/$\Lambda^4$) in theoretical predictions. In this presentation, we analyze SMEFT at O(1/$\Lambda^4$), including 1-loop renormalization group evolution (RGE) effects arising from the scale dependence of Wilson coefficients, with explicit incorporation of...

58. Higgs Production via Gluon Fusion in the SMEFT at Next-to-Leading Order

Luigi Bellafronte (Florida State University)

27/05/2026, 16:20

Gluon-gluon fusion is the dominant channel for Higgs production at the Large Hadron Collider (LHC) and will remain a key probe of Higgs interactions at the High-Luminosity LHC, where improved experimental precision will require equally precise theoretical predictions. In this talk we focus on Higgs production via gluon-gluon fusion within the Standard Model Effective Field Theory (SMEFT) at...

3. Parity-Violating Moller Scattering at NNLO: Electroweak bosonic contribution

Juhun Kwak (University of Pittsburgh)

27/05/2026, 16:40

We present the analytic computation of the two-loop electroweak bosonic correction to the parity asymmetry in Moller scattering at low energy. The hierarchy of scales, namely $m_Z^2\gg q^2\gg m_e^2$, and the IR singularities are treated with the method of regions. We discuss the implications of our results to MOLLER at JLab and give an outlook for electron-proton and electron-nucleus scattering at P2.

49. Electroweak corrections to gg → γγ

Gabriele Fiore (ETH Zurich)

27/05/2026, 17:00

Since the discovery of the Higgs boson at LHC, particle physics has entered a new precision era in which improving the accuracy of Standard Model predictions is essential for testing the theory and uncovering potential hints of new physics. In this context, diphoton production plays an important role, both as a probe of the Standard Model and as a background for Higgs measurements. As...

1. NLO corrections to inclusive $\bar{B} \to X_s \gamma$ decays at subleading power

Riccardo Bartocci (Karlsruhe Institute of Technology (KIT))

27/05/2026, 17:20

Theoretical predictions in hadron physics are often limited by non-perturbative uncertainties in QCD. Nevertheless, several phenomenologically important processes require improved theoretical control. Effective field theories, such as Soft-Collinear Effective Theory (SCET) and Heavy Quark Effective Theory (HQET), provide powerful tools to overcome these limitations by exploiting...

9. A perturbative framework to probe IR sensitivity in non-Abelian gauge theories

Duarte Fontes

27/05/2026, 17:40

Infrared sensitivity in asymptotically free non-abelian gauge theories is intimately connected to non-perturbative effects in processes with large momentum transfer. In the renormalon framework, such effects are probed by introducing a small gluon mass. Yet this procedure breaks gauge invariance, effectively restricting collider applications to reactions without gluons at Born level. In this...