Outputs (23)

Electroweak skyrmions in the HEFT (2021)
Journal Article
Criado, J. C., Khoze, V. V., & Spannowsky, M. (2021). Electroweak skyrmions in the HEFT. Journal of High Energy Physics, 2021(12), Article 26. https://doi.org/10.1007/jhep12%282021%29026

We study the existence of skyrmions in the presence of all the electroweak degrees of freedom, including a dynamical Higgs boson, with the electroweak symmetry being non-linearly realized in the scalar sector. For this, we use the formulation of the... Read More about Electroweak skyrmions in the HEFT.

Small instantons and the strong CP problem in composite Higgs models (2021)
Journal Article
Gupta, R., Khoze, V., & Spannowsky, M. (2021). Small instantons and the strong CP problem in composite Higgs models. Physical Review D, 104(7), Article 075011. https://doi.org/10.1103/physrevd.104.075011

We show that QCD instantons can generate large effects at small length scales in the ultraviolet in standard composite Higgs models that utilize partial compositeness. This has important implications for possible solutions of the strong CP problem in... Read More about Small instantons and the strong CP problem in composite Higgs models.

Probing dark matter clumps, strings and domain walls with gravitational wave detectors (2021)
Journal Article
Jaeckel, J., Schenk, S., & Spannowsky, M. (2021). Probing dark matter clumps, strings and domain walls with gravitational wave detectors. The European Physical Journal C, 81(9), Article 828. https://doi.org/10.1140/epjc/s10052-021-09604-9

Gravitational wave astronomy has recently emerged as a new way to study our Universe. In this work, we survey the potential of gravitational wave interferometers to detect macroscopic astrophysical objects comprising the dark matter. Starting from th... Read More about Probing dark matter clumps, strings and domain walls with gravitational wave detectors.

Unsupervised event classification with graphs on classical and photonic quantum computers (2021)
Journal Article
Blance, A., & Spannowsky, M. (2021). Unsupervised event classification with graphs on classical and photonic quantum computers. Journal of High Energy Physics, 2021(8), https://doi.org/10.1007/jhep08%282021%29170

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.

Spectral walls in multifield kink dynamics (2021)
Journal Article
Adam, C., Oles, K., Romanczukiewicz, T., Wereszczynski, A., & Zakrzewski, W. (2021). Spectral walls in multifield kink dynamics. Journal of High Energy Physics, 2021(8), https://doi.org/10.1007/jhep08%282021%29147

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.

Anomaly detection with convolutional Graph Neural Networks (2021)
Journal Article
Atkinson, O., Bhardwaj, A., Englert, C., Ngairangbam, V. S., & Spannowsky, M. (2021). Anomaly detection with convolutional Graph Neural Networks. Journal of High Energy Physics, 2021(8), https://doi.org/10.1007/jhep08%282021%29080

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.

A fully differential SMEFT analysis of the golden channel using the method of moments (2021)
Journal Article
Banerjee, S., Gupta, R. S., Ochoa-Valeriano, O., Spannowsky, M., & Venturini, E. (2021). A fully differential SMEFT analysis of the golden channel using the method of moments. Journal of High Energy Physics, 2021(6), Article 31. https://doi.org/10.1007/jhep06%282021%29031

The Method of Moments is a powerful framework to disentangle the relative contributions of amplitudes of a specific process to its various phase space regions. We apply this method to carry out a fully differential analysis of the Higgs decay channel... Read More about A fully differential SMEFT analysis of the golden channel using the method of moments.

EFT diagrammatica: UV roots of the CP-conserving SMEFT (2021)
Journal Article
Bakshi, S. D., Chakrabortty, J., Prakash, S., Rahaman, S. U., & Spannowsky, M. (2021). EFT diagrammatica: UV roots of the CP-conserving SMEFT. Journal of High Energy Physics, 2021(6), Article 33. https://doi.org/10.1007/jhep06%282021%29033

The Standard Model Effective Field Theory (SMEFT) is an established theoretical framework that parametrises the impact a UV theory has on low-energy observables. Such parametrization is achieved by studying the interactions of SM fields encapsulated... Read More about EFT diagrammatica: UV roots of the CP-conserving SMEFT.

Extended Higgs boson sectors, effective field theory, and Higgs boson phenomenology (2021)
Journal Article
Anisha, Banerjee, U., Chakrabortty, J., Englert, C., & Spannowsky, M. (2021). Extended Higgs boson sectors, effective field theory, and Higgs boson phenomenology. Physical Review D, 103(9), https://doi.org/10.1103/physrevd.103.096009

We consider the phenomenological implications of charged scalar extensions of the Standard Model (SM) Higgs sector in addition to effective field theory (EFT) couplings of this new state to SM matter. We perform a detailed investigation of modificati... Read More about Extended Higgs boson sectors, effective field theory, and Higgs boson phenomenology.

Combine and conquer: event reconstruction with Bayesian Ensemble Neural Networks (2021)
Journal Article
Araz, J. Y., & Spannowsky, M. (2021). Combine and conquer: event reconstruction with Bayesian Ensemble Neural Networks. Journal of High Energy Physics, 2021(4), Article 296. https://doi.org/10.1007/jhep04%282021%29296

Ensemble learning is a technique where multiple component learners are combined through a protocol. We propose an Ensemble Neural Network (ENN) that uses the combined latent-feature space of multiple neural network classifiers to improve the represen... Read More about Combine and conquer: event reconstruction with Bayesian Ensemble Neural Networks.

Towards a quantum computing algorithm for helicity amplitudes and parton showers (2021)
Journal Article
Bepari, K., Malik, S., Spannowsky, M., & Williams, S. (2021). Towards a quantum computing algorithm for helicity amplitudes and parton showers. Physical Review D, 103(7), Article 076020. https://doi.org/10.1103/physrevd.103.076020

The interpretation of measurements of high-energy particle collisions relies heavily on the performance of full event generators, which include the calculation of the hard process and the subsequent parton shower step. With the continuous improvement... Read More about Towards a quantum computing algorithm for helicity amplitudes and parton showers.

Precision SMEFT bounds from the VBF Higgs at high transverse momentum (2021)
Journal Article
Araz, J. Y., Banerjee, S., Gupta, R. S., & Spannowsky, M. (2021). Precision SMEFT bounds from the VBF Higgs at high transverse momentum. Journal of High Energy Physics, 2021(4), Article 125. https://doi.org/10.1007/jhep04%282021%29125

We study the production of Higgs bosons at high transverse momenta via vector-boson fusion (VBF) in the Standard Model Effective Field Theory (SMEFT). We find that contributions from four independent operator combinations dominate in this limit. Thes... Read More about Precision SMEFT bounds from the VBF Higgs at high transverse momentum.

Exploring instantons in nonlinear sigma models with spin-lattice systems (2021)
Journal Article
Schenk, S., & Spannowsky, M. (2021). Exploring instantons in nonlinear sigma models with spin-lattice systems. Physical Review B, 103(14), Article 144436. https://doi.org/10.1103/physrevb.103.144436

Instanton processes are present in a variety of quantum field theories relevant to high energy as well as condensed matter physics. While they have led to important theoretical insights and physical applications, their underlying features often remai... Read More about Exploring instantons in nonlinear sigma models with spin-lattice systems.

Quantum-Field-Theoretic Simulation Platform for Observing the Fate of the False Vacuum (2021)
Journal Article
Abel, S., & Spannowsky, M. (2021). Quantum-Field-Theoretic Simulation Platform for Observing the Fate of the False Vacuum. PRX Quantum, 2(1), Article 010349. https://doi.org/10.1103/prxquantum.2.010349

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.

Classifying standard model extensions effectively with precision observables (2021)
Journal Article
Das Bakshi, S., Chakrabortty, J., & Spannowsky, M. (2021). Classifying standard model extensions effectively with precision observables. Physical Review D, 103(5), Article 056019. https://doi.org/10.1103/physrevd.103.056019

Effective theories are well established theoretical frameworks to describe the effect of energetically widely separated UV models on observables at lower energy scales. Due to the complexity of the effective theory when taking all the Standard Model... Read More about Classifying standard model extensions effectively with precision observables.

Cosmological bubble friction in local equilibrium (2021)
Journal Article
Balaji, S., Spannowsky, M., & Tamarit, C. (2021). Cosmological bubble friction in local equilibrium. Journal of Cosmology and Astroparticle Physics, 2021(03), Article 051. https://doi.org/10.1088/1475-7516/2021/03/051

In first-order cosmological phase transitions, the asymptotic velocity of expanding bubbles is of crucial relevance for predicting observables like the spectrum of stochastic gravitational waves, or for establishing the viability of mechanisms explai... Read More about Cosmological bubble friction in local equilibrium.

The emergence of electroweak Skyrmions through Higgs bosons (2021)
Journal Article
Criado, J. C., Khoze, V. V., & Spannowsky, M. (2021). The emergence of electroweak Skyrmions through Higgs bosons. Journal of High Energy Physics, 2021(3), Article 162. https://doi.org/10.1007/jhep03%282021%29162

Skyrmions are extended field configurations, initially proposed to describe baryons as topological solitons in an effective field theory of mesons. We investigate and confirm the existence of skyrmions within the electroweak sector of the Standard Mo... Read More about The emergence of electroweak Skyrmions through Higgs bosons.

CP violation at ATLAS in effective field theory (2021)
Journal Article
Das Bakshi, S., Chakrabortty, J., Englert, C., Spannowsky, M., & Stylianou, P. (2021). CP violation at ATLAS in effective field theory. Physical Review D, 103(5), Article 055008. https://doi.org/10.1103/physrevd.103.055008

CP violation beyond the Standard Model (SM) is a crucial missing piece for explaining the observed matter-antimatter asymmetry in the Universe. Recently, the ATLAS experiment at the Large Hadron Collider performed an analysis of electroweak Zjj produ... Read More about CP violation at ATLAS in effective field theory.

Quantum machine learning for particle physics using a variational quantum classifier (2021)
Journal Article
Blance, A., & Spannowsky, M. (2021). Quantum machine learning for particle physics using a variational quantum classifier. Journal of High Energy Physics, 2021, Article 212. https://doi.org/10.1007/jhep02%282021%29212

Quantum machine learning aims to release the prowess of quantum computing to improve machine learning methods. By combining quantum computing methods with classical neural network techniques we aim to foster an increase of performance in solving clas... Read More about Quantum machine learning for particle physics using a variational quantum classifier.

Effective connections of aμ , Higgs physics, and the collider frontier (2021)
Journal Article
Anisha, Banerjee, U., Chakrabortty, J., Englert, C., Spannowsky, M., & Stylianou, P. (2022). Effective connections of aμ , Higgs physics, and the collider frontier. Physical Review D, 105(1), https://doi.org/10.1103/physrevd.105.016019

We consider scalar extensions of the Standard Model (SM) and their effective field theoretic generalizations to illustrate the phenomenological connection between precision measurements of the anomalous magnetic moment of the muon aμ, precision Higgs... Read More about Effective connections of aμ , Higgs physics, and the collider frontier.

Effective operator bases for beyond Standard Model scenarios: an EFT compendium for discoveries (2021)
Journal Article
Banerjee, U., Chakrabortty, J., Prakash, S., Rahaman, S. U., & Spannowsky, M. (2021). Effective operator bases for beyond Standard Model scenarios: an EFT compendium for discoveries. Journal of High Energy Physics, 2021(1), Article 28. https://doi.org/10.1007/jhep01%282021%29028

It is not only conceivable but likely that the spectrum of physics beyond the Standard Model (SM) is non-degenerate. The lightest non-SM particle may reside close enough to the electroweak scale that it can be kinematically probed at high-energy expe... Read More about Effective operator bases for beyond Standard Model scenarios: an EFT compendium for discoveries.

Searching for QCD instantons at hadron colliders (2021)
Journal Article
Khoze, V. V., Milne, D. L., & Spannowsky, M. (2021). Searching for QCD instantons at hadron colliders. Physical Review D, 103(1), Article 014017. https://doi.org/10.1103/physrevd.103.014017

QCD instantons are arguably the best motivated yet unobserved nonperturbative effects predicted by the Standard Model. A discovery and detailed study of instanton-generated processes at colliders would provide a new window into the phenomenological e... Read More about Searching for QCD instantons at hadron colliders.

Quantum computing for quantum tunneling (2021)
Journal Article
Abel, S., Chancellor, N., & Spannowsky, M. (2021). Quantum computing for quantum tunneling. Physical Review D, 103(1), Article 016008. https://doi.org/10.1103/physrevd.103.016008

We demonstrate how quantum field theory problems can be practically encoded by using a discretization of the field theory problem into a general Ising model, with the continuous field values being encoded into Ising spin chains. To illustrate the met... Read More about Quantum computing for quantum tunneling.