Outputs (400)

Medium effects in supernovae constraints on light mediators (2021)
Journal Article

In this article, we reevaluate supernovae (SN) constraints on the diffusion time of neutrinos for a family of extensions of the Standard Model that incorporate new light scalar and vector mediators. We compute the neutrino mean free path, taking into... Read More about Medium effects in supernovae constraints on light mediators.

Logarithmic corrections to the QCD component of same-sign W -pair production for vector boson scattering studies (2021)
Journal Article

Hunting for QCD instantons at the LHC in events with large rapidity gaps (2021)
Journal Article

We outline a strategy of how to search for QCD instantons of invariant mass 20–60 GeVin diffractive events in low-luminosity runs at the LHC. We show that, by imposing appropriate selection criteria on the final states, one can select the kinematic r... Read More about Hunting for QCD instantons at the LHC in events with large rapidity gaps.

Amplituhedron-like geometries (2021)
Journal Article

We consider amplituhedron-like geometries which are defined in a similar way to the intrinsic definition of the amplituhedron but with non-maximal winding number. We propose that for the cases with minimal number of points the canonical form of these... Read More about Amplituhedron-like geometries.

SMEFT analysis of vector boson scattering and diboson data from the LHC Run II (2021)
Journal Article

We present a systematic interpretation of vector boson scattering (VBS) and diboson measurements from the LHC in the framework of the dimension-six standard model effective field theory (SMEFT). We consider all available measurements of VBS fiducial... Read More about SMEFT analysis of vector boson scattering and diboson data from the LHC Run II.

Spectral walls in multifield kink dynamics (2021)
Journal Article

We show that spectral walls are common phenomena in the dynamics of kinks in (1+1) dimensions. They occur in models based on two or more scalar fields with a nonempty Bogomol’nyi-Prasad-Sommerfield (BPS) sector, hosting two zero modes, where they are... Read More about Spectral walls in multifield kink dynamics.

Optimising simulations for diphoton production at hadron colliders using amplitude neural networks (2021)
Journal Article

Machine learning technology has the potential to dramatically optimise event generation and simulations. We continue to investigate the use of neural networks to approximate matrix elements for high-multiplicity scattering processes. We focus on the... Read More about Optimising simulations for diphoton production at hadron colliders using amplitude neural networks.

Driven black holes: from Kolmogorov scaling to turbulent wakes (2021)
Journal Article

General relativity governs the nonlinear dynamics of spacetime, including black holes and their event horizons. We demonstrate that forced black hole horizons exhibit statistically steady turbulent spacetime dynamics consistent with Kolmogorov’s theo... Read More about Driven black holes: from Kolmogorov scaling to turbulent wakes.

Unsupervised event classification with graphs on classical and photonic quantum computers (2021)
Journal Article

Photonic Quantum Computers provide several benefits over the discrete qubit-based paradigm of quantum computing. By using the power of continuous-variable computing we build an anomaly detection model to use on searches for New Physics. Our model use... Read More about Unsupervised event classification with graphs on classical and photonic quantum computers.

A factorisation-aware Matrix element emulator (2021)
Journal Article

In this article we present a neural network based model to emulate matrix elements. This model improves on existing methods by taking advantage of the known factorisation properties of matrix elements. In doing so we can control the behaviour of simu... Read More about A factorisation-aware Matrix element emulator.

Challenges in Monte Carlo Event Generator Software for High-Luminosity LHC (2021)
Journal Article

We review the main software and computing challenges for the Monte Carlo physics event generators used by the LHC experiments, in view of the High-Luminosity LHC (HL-LHC) physics programme. This paper has been prepared by the HEP Software Foundation... Read More about Challenges in Monte Carlo Event Generator Software for High-Luminosity LHC.

Anomaly detection with convolutional Graph Neural Networks (2021)
Journal Article

We devise an autoencoder based strategy to facilitate anomaly detection for boosted jets, employing Graph Neural Networks (GNNs) to do so. To overcome known limitations of GNN autoencoders, we design a symmetric decoder capable of simultaneously reco... Read More about Anomaly detection with convolutional Graph Neural Networks.

The pp → W(→ lν) + γ process at next-to-next-to-leading order (2021)
Journal Article

We present details of the calculation of the pp → W(→ lν)γ process at next-to-next-to-leading order in QCD, calculated using the jettiness slicing method. The calculation is based entirely on analytic amplitudes. Because of the radiation zero, the NL... Read More about The pp → W(→ lν) + γ process at next-to-next-to-leading order.

Resonance structures in kink-antikink collisions in a deformed sine-Gordon model (2021)
Journal Article

We study kink-antikink collisions in a model which interpolates smoothly between the completely integrable sine-Gordon theory, the ϕ4 model, and a ϕ6-like model with three degenerate vacua. We find a rich variety of behaviours, including integrabilit... Read More about Resonance structures in kink-antikink collisions in a deformed sine-Gordon model.

Quantum-Field-Theoretic Simulation Platform for Observing the Fate of the False Vacuum (2021)
Journal Article

We design and implement a quantum annealing simulation platform to observe and study dynamical processes in quantum field theory (QFT). Our approach encodes the field theory as an Ising model, which is then solved by a quantum annealer. As a proof of... Read More about Quantum-Field-Theoretic Simulation Platform for Observing the Fate of the False Vacuum.

Fully Differential Higgs Boson Production to Third Order in QCD (2021)
Journal Article

We present the first fully differential predictions for the production cross section of a Higgs boson via the gluon fusion mechanism at next-to-next-to-next-to-leading order ( N 3 LO ) in QCD perturbation theory. Differential distributions are shown... Read More about Fully Differential Higgs Boson Production to Third Order in QCD.

An optimal non-linear method for simulating relic neutrinos (2021)
Journal Article

Cosmology places the strongest current limits on the sum of neutrino masses. Future observations will further improve the sensitivity and this will require accurate cosmological simulations to quantify possible systematic uncertainties and to make pr... Read More about An optimal non-linear method for simulating relic neutrinos.

Natural inflation, strong dynamics, and the role of generalized anomalies (2020)
Journal Article

We revisit models of natural inflation and show that the single-field effective theory described by the potential V ( a ) ∼ cos a f breaks down as the inflaton a makes large-field excursions, even for values of f smaller than the Planck scale. To rem... Read More about Natural inflation, strong dynamics, and the role of generalized anomalies.

Self-conjugate QCD (2019)
Journal Article

We carry out a systematic study of SU(6) Yang-Mills theory endowed with fermions in the adjoint and 3-index antisymmetric mixed-representation. The fermion bilinear in the 3-index antisymmetric representation vanishes identically, which leads to inte... Read More about Self-conjugate QCD.

Entanglement entropy, dualities, and deconfinement in gauge theories (2018)
Journal Article

Computing the entanglement entropy in confining gauge theories is often accompanied by puzzles and ambiguities. In this work we show that compactifying the theory on a small circle S1L evades these difficulties. In particular, we study Yang-Mills the... Read More about Entanglement entropy, dualities, and deconfinement in gauge theories.