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Simulated Milky Way analogues: implications for dark matter indirect searches (2015)
Journal Article
Calore, F., Bozorgnia, N., Lovell, M., Bertone, G., Schaller, M., Frenk, C., …Trayford, J. (2015). Simulated Milky Way analogues: implications for dark matter indirect searches. Journal of Cosmology and Astroparticle Physics, 2015(12), Article 053. https://doi.org/10.1088/1475-7516/2015/12/053

We study high-resolution hydrodynamic simulations of Milky Way type galaxies obtained within the "Evolution and Assembly of GaLaxies and their Environments" (EAGLE) project, and identify those that best satisfy observational constraints on the Milky... Read More about Simulated Milky Way analogues: implications for dark matter indirect searches.

New NLOPS predictions for tt¯+btt¯+b -jet production at the LHC (2018)
Journal Article
Ježo, T., Lindert, J. M., Moretti, N., & Pozzorini, S. (2018). New NLOPS predictions for tt¯+btt¯+b -jet production at the LHC. The European Physical Journal C, 78(6), Article 502. https://doi.org/10.1140/epjc/s10052-018-5956-0

Measurements of tt¯H production in the H→bb¯ channel depend in a critical way on the theoretical uncertainty associated with the irreducible tt¯+b -jet background. In this paper, analysing the various topologies that account for b-jet production in a... Read More about New NLOPS predictions for tt¯+btt¯+b -jet production at the LHC.

A comprehensive framework for studying W′ and Z′ bosons at hadron colliders with automated jet veto resummation (2017)
Journal Article
Fuks, B., & Ruiz, R. (2017). A comprehensive framework for studying W′ and Z′ bosons at hadron colliders with automated jet veto resummation. Journal of High Energy Physics, 2017(5), Article 32. https://doi.org/10.1007/jhep05%282017%29032

The production of high-mass, color-singlet particles in hadron collisions is universally accompanied by initial state QCD radiation that is predominantly soft with respect to the hard process scale Q and/or collinear with respect to the beam axis. At... Read More about A comprehensive framework for studying W′ and Z′ bosons at hadron colliders with automated jet veto resummation.

Assessing degrees of entanglement of phonon states in atomic Bose gases through the measurement of commuting observables (2017)
Journal Article
Robertson, S., Michel, F., & Parentani, R. (2017). Assessing degrees of entanglement of phonon states in atomic Bose gases through the measurement of commuting observables. Physical Review D, 96(4), Article 045012. https://doi.org/10.1103/physrevd.96.045012

We show that measuring commuting observables can be sufficient to assess that a bipartite state is entangled according to either nonseparability or the stronger criterion of “steerability.” Indeed, the measurement of a single observable might reveal... Read More about Assessing degrees of entanglement of phonon states in atomic Bose gases through the measurement of commuting observables.

Intersection of world-lines on curved surfaces and path-ordering of the Wilson loop (2018)
Journal Article
Curry, C., & Mansfield, P. (2018). Intersection of world-lines on curved surfaces and path-ordering of the Wilson loop. Journal of High Energy Physics, 2018(6), Article 81. https://doi.org/10.1007/jhep06%282018%29081

We study contact interactions for long world-lines on a curved surface, focusing on the average number of times two world-lines intersect as a function of their end-points. The result can be used to extend the concept of path-ordering, as employed in... Read More about Intersection of world-lines on curved surfaces and path-ordering of the Wilson loop.

Skyrmion knots in frustrated magnets (2017)
Journal Article
Sutcliffe, P. (2017). Skyrmion knots in frustrated magnets. Physical Review Letters, 118(24), Article 247203. https://doi.org/10.1103/physrevlett.118.247203

A magnetic Skyrmion is a stable two-dimensional nanoparticle describing a localized winding of the magnetization in certain magnetic materials. Skyrmions are the subject of intense experimental and theoretical investigation and have potential technol... Read More about Skyrmion knots in frustrated magnets.

Momentum conserving defects in affine Toda field theories (2017)
Journal Article
Bristow, R., & Bowcock, P. (2017). Momentum conserving defects in affine Toda field theories. Journal of High Energy Physics, 2017(5), Article 153. https://doi.org/10.1007/jhep05%282017%29153

Type II integrable defects with more than one degree of freedom at the defect are investigated. A condition on the form of the Lagrangian for such defects is found which ensures the existence of a conserved momentum in the presence of the defect. In... Read More about Momentum conserving defects in affine Toda field theories.

Maxi-sizing the trilinear Higgs self-coupling: how large could it be? (2017)
Journal Article
Di Luzio, L., Gröber, R., & Spannowsky, M. (2017). Maxi-sizing the trilinear Higgs self-coupling: how large could it be?. The European Physical Journal C, 77, Article 788. https://doi.org/10.1140/epjc/s10052-017-5361-0

In order to answer the question on how much the trilinear Higgs self-coupling could deviate from its Standard Model value in weakly coupled models, we study both theoretical and phenomenological constraints. As a first step, we discuss this question... Read More about Maxi-sizing the trilinear Higgs self-coupling: how large could it be?.

Supersymmetric Casimir energy and the anomaly polynomial (2015)
Journal Article
Bobev, N., Bullimore, M., & Kim, H. (2015). Supersymmetric Casimir energy and the anomaly polynomial. Journal of High Energy Physics, 2015(09), Article 142. https://doi.org/10.1007/jhep09%282015%29142

We conjecture that for superconformal field theories in even dimensions, the supersymmetric Casimir energy on a space with topology S 1 × S D−1 is equal to an equivariant integral of the anomaly polynomial. The equivariant integration is defined with... Read More about Supersymmetric Casimir energy and the anomaly polynomial.

Defect networks and supersymmetric loop operators (2015)
Journal Article
Bullimore, M. (2015). Defect networks and supersymmetric loop operators. Journal of High Energy Physics, 2015(2), Article 066. https://doi.org/10.1007/jhep02%282015%29066

We consider topological defect networks with junctions in A N − 1 Toda CFT and the connection to supersymmetric loop operators in N=2 theories of class S on a four-sphere. Correlation functions in the presence of topological defect networks are compu... Read More about Defect networks and supersymmetric loop operators.

A proof of the correlation function/supersymmetric Wilson loop correspondence (2011)
Journal Article
Adamo, T., Bullimore, M., Mason, L., & Skinner, D. (2011). A proof of the correlation function/supersymmetric Wilson loop correspondence. Journal of High Energy Physics, 2011(08), Article 076. https://doi.org/10.1007/jhep08%282011%29076

We prove that in the limit when its insertion points become pairwise null-separated, the ratio of certain n-point correlation functions in N=4 SYM is equal to a supersymmetric Wilson loop on twistor space, acting in the adjoint representation. In the... Read More about A proof of the correlation function/supersymmetric Wilson loop correspondence.

Inverse soft factors and grassmannian residues (2011)
Journal Article
Bullimore, M. (2011). Inverse soft factors and grassmannian residues. Journal of High Energy Physics, 2011(01), Article 055. https://doi.org/10.1007/jhep01%282011%29055

The action of holomorphic inverse soft factors on scattering amplitudes in N=4 SYM is shown to take a remarkably simple form in momentum twistor space. This is used to identify individual residues of the grassmannian with primitive leading singularit... Read More about Inverse soft factors and grassmannian residues.

The photon PDF of the proton (2014)
Journal Article
Martin, A., & Ryskin, M. (2014). The photon PDF of the proton. The European Physical Journal C, 74(9), Article 3040. https://doi.org/10.1140/epjc/s10052-014-3040-y

We show how the photon input parton distribution function (PDF) may be calculated with good accuracy and used in an extended DGLAP global parton analysis in which the photon is treated as an additional point-like parton. The uncertainty of the input... Read More about The photon PDF of the proton.

The impact of the final HERA combined data on PDFs obtained from a global fit (2016)
Journal Article
Harland-Lang, L., Martin, A., Motylinski, P., & Thorne, R. (2016). The impact of the final HERA combined data on PDFs obtained from a global fit. The European Physical Journal C, 76(4), Article 186. https://doi.org/10.1140/epjc/s10052-016-4020-1

We investigate the effect of including the HERA run I + II combined cross section data on the MMHT2014 PDFs. We present the fit quality within the context of the global fit and when only the HERA data are included. We examine the changes in both the... Read More about The impact of the final HERA combined data on PDFs obtained from a global fit.

Scale dependence of open cc¯ and bb¯ production in the low x region (2017)
Journal Article
Oliveira, E. D., Martin, A., & Ryskin, M. (2017). Scale dependence of open cc¯ and bb¯ production in the low x region. The European Physical Journal C, 77(3), Article 182. https://doi.org/10.1140/epjc/s10052-017-4750-8

The ‘optimal’ factorization scale μ0μ0 is calculated for open heavy quark production. We find that the optimal value is μF=μ0≃0.85p2T+m2Q−−−−−−−√μF=μ0≃0.85pT2+mQ2 ; a choice which allows us to resum the double-logarithmic, (αslnμ2Fln(1/x))n(αsln⁡μF2l... Read More about Scale dependence of open cc¯ and bb¯ production in the low x region.

Skyrmions in models with pions and rho mesons (2018)
Journal Article
Naya, C., & Sutcliffe, P. (2018). Skyrmions in models with pions and rho mesons. Journal of High Energy Physics, 2018(5), Article 174. https://doi.org/10.1007/jhep05%282018%29174

A problem with the standard Skyrme model is that Skyrmion binding energies are around 15%, being much larger than the order 1% binding energies of the nuclei that they aim to describe. Here we consider theories that extend the standard Skyrme model o... Read More about Skyrmions in models with pions and rho mesons.

Higgs boson pair production at NNLO with top quark mass effects (2018)
Journal Article
Grazzini, M., Heinrich, G., Jones, S., Kallweit, S., Kerner, M., Lindert, J., & Mazzitelli, J. (2018). Higgs boson pair production at NNLO with top quark mass effects. Journal of High Energy Physics, 2018(5), Article 59. https://doi.org/10.1007/jhep05%282018%29059

We consider QCD radiative corrections to Higgs boson pair production through gluon fusion in proton collisions. We combine the exact next-to-leading order (NLO) contribution, which features two-loop virtual amplitudes with the full dependence on the... Read More about Higgs boson pair production at NNLO with top quark mass effects.

Loop corrections for Kaluza-Klein AdS amplitudes (2018)
Journal Article
Aprile, F., Drummond, J., Heslop, P., & Paul, H. (2018). Loop corrections for Kaluza-Klein AdS amplitudes. Journal of High Energy Physics, 2018(5), Article 56. https://doi.org/10.1007/jhep05%282018%29056

Recently we conjectured the four-point amplitude of graviton multiplets in AdS5 × S5 at one loop by exploiting the operator product expansion of N = 4 super Yang-Mills theory. Here we give the first extension of those results to include Kaluza-Klein... Read More about Loop corrections for Kaluza-Klein AdS amplitudes.