Skip to main content

Research Repository

Advanced Search

Outputs (2904)

Thermal correlation functions of KdV charges in 2D CFT (2019)
Journal Article
Maloney, A., Ng, G. S., Ross, S. F., & Tsiares, I. (2019). Thermal correlation functions of KdV charges in 2D CFT. Journal of High Energy Physics, 2019(2), Article 44. https://doi.org/10.1007/jhep02%282019%29044

Two dimensional CFTs have an infinite set of commuting conserved charges, known as the quantum KdV charges, built out of the stress tensor. We compute the thermal correlation functions of the these KdV charges on a circle. We show that these correlat... Read More about Thermal correlation functions of KdV charges in 2D CFT.

Maximal flavour violation: a Cabibbo mechanism for leptoquarks (2018)
Journal Article
Di Luzio, L., Fuentes-Martin, J., Greljo, A., Nardecchia, M., & Renner, S. (2018). Maximal flavour violation: a Cabibbo mechanism for leptoquarks. Journal of High Energy Physics, 2018(11), Article 081. https://doi.org/10.1007/jhep11%282018%29081

We propose a mechanism that allows for sizeable flavour violation in quark-lepton currents, while suppressing flavour changing neutral currents in quark-quark and lepton-lepton sectors. The mechanism is applied to the recently proposed “4321” renorma... Read More about Maximal flavour violation: a Cabibbo mechanism for leptoquarks.

How high is the neutrino floor? (2019)
Journal Article
Bœhm, C., Cerdeño, D. G., Machado, P. A. N., Campo, A. O.-D., & Reid, E. (2019). How high is the neutrino floor?. Journal of Cosmology and Astroparticle Physics, 2019(01), Article 043. https://doi.org/10.1088/1475-7516/2019/01/043

In this paper, we compute the contribution to the coherent elastic neutrino-nucleus scattering cross section from new physics models in the neutrino sector. We use this information to calculate the maximum value of the so-called neutrino floor for di... Read More about How high is the neutrino floor?.

Precise predictions for tt¯γ/tt¯ cross section ratios at the LHC (2019)
Journal Article
Bevilacqua, G., Hartanto, H., Kraus, M., Weber, T., & Worek, M. (2019). Precise predictions for tt¯γ/tt¯ cross section ratios at the LHC. Journal of High Energy Physics, 2019(1), Article 188. https://doi.org/10.1007/jhep01%282019%29188

With the goal of increasing the precision of NLO QCD predictions for the pp→tt¯γ process in the di-lepton top quark decay channel we present theoretical predictions for the R=σtt¯γ/σtt¯ cross section ratio. Results for the latter together with variou... Read More about Precise predictions for tt¯γ/tt¯ cross section ratios at the LHC.

Spin correlations in parton shower simulations (2019)
Journal Article
Richardson, P., & Webster, S. (2019). Spin correlations in parton shower simulations. The European Physical Journal C, 80(2), Article 83. https://doi.org/10.1140/epjc/s10052-019-7429-5

Spin correlations are an important, but often neglected, effect in modern Monte Carlo event generators. We show that they can be fully incorporated in HERWIG7 using the algorithm originally proposed by Collins and Knowles in all stages of the event g... Read More about Spin correlations in parton shower simulations.

Analytic helicity amplitudes for two-loop five-gluon scattering: the single-minus case (2019)
Journal Article
Badger, S., Brønnum-Hansen, C., Hartanto, H. B., & Peraro, T. (2019). Analytic helicity amplitudes for two-loop five-gluon scattering: the single-minus case. Journal of High Energy Physics, 2019(1), Article 186. https://doi.org/10.1007/jhep01%282019%29186

We present a compact analytic expression for the leading colour two-loop five-gluon amplitude in Yang-Mills theory with a single negative helicity and four positive helicities. The analytic result is reconstructed from numerical evaluations over fini... Read More about Analytic helicity amplitudes for two-loop five-gluon scattering: the single-minus case.

Bosonic Symmetries of $(2,0)$ DLCQ Field Theories (2020)
Journal Article
Lambert, N., Lipstein, A., Mouland, R., & Richmond, P. (2020). Bosonic Symmetries of $(2,0)$ DLCQ Field Theories. Journal of High Energy Physics, 2020(01), Article 166. https://doi.org/10.1007/jhep01%282020%29166

We investigate symmetries of the six-dimensional (2,0) theory reduced along a compact null direction. The action for this theory was deduced by considering M-theory on AdS7×S4 and reducing the AdS7 factor along a time-like Hopf fibration which breaks... Read More about Bosonic Symmetries of $(2,0)$ DLCQ Field Theories.

Axion mass prediction from minimal grand unification (2018)
Journal Article
Di Luzio, L., Ringwald, A., & Tamarit, C. (2018). Axion mass prediction from minimal grand unification. Physical Review D, 98(9), Article 095011. https://doi.org/10.1103/physrevd.98.095011

We propose a minimal realization of the Peccei-Quinn mechanism in a realistic SU(5) model, where the axion mass is directly connected to the grand unification scale. Accounting for constraints from proton decay, collider searches and gauge coupling u... Read More about Axion mass prediction from minimal grand unification.

Exclusive LHC physics with heavy ions: SuperChic 3 (2019)
Journal Article
Harland-Lang, L., Khoze, V., & Ryskin, M. (2019). Exclusive LHC physics with heavy ions: SuperChic 3. The European Physical Journal C, 79(1), Article 39. https://doi.org/10.1140/epjc/s10052-018-6530-5

We present results of the updated SuperChic 3 Monte Carlo event generator for central exclusive production. This extends the previous treatment of proton–proton collisions to include heavy ion (pA and AA) beams, for both photon and QCD-initiated prod... Read More about Exclusive LHC physics with heavy ions: SuperChic 3.

Secondary products in supersymmetric field theory (2020)
Journal Article
Beem, C., Ben-Zvi, D., Bullimore, M., Dimofte, T., & Neitzke, A. (2020). Secondary products in supersymmetric field theory. Annales Henri Poincaré, 21(4), 1235-1310. https://doi.org/10.1007/s00023-020-00888-3

The product of local operators in a topological quantum field theory in dimension greater than one is commutative, as is more generally the product of extended operators of codimension greater than one. In theories of cohomological type, these commut... Read More about Secondary products in supersymmetric field theory.

Pentagon functions for massless planar scattering amplitudes (2018)
Journal Article
Gehrmann, T., Henn, J., & Lo Presti, N. (2018). Pentagon functions for massless planar scattering amplitudes. Journal of High Energy Physics, 2018(10), Article 103. https://doi.org/10.1007/jhep10%282018%29103

Loop amplitudes for massless five particle scattering processes contain Feynman integrals depending on the external momentum invariants: pentagon functions. We perform a detailed study of the analyticity properties and cut structure of these function... Read More about Pentagon functions for massless planar scattering amplitudes.

The A4, S4 and A5 flavor symmetries in light of data on neutrino mixing (2018)
Journal Article
Petcov, S., & Titov, A. (2018). The A4, S4 and A5 flavor symmetries in light of data on neutrino mixing. International Journal of Modern Physics A, 33(31), Article 1844024. https://doi.org/10.1142/s0217751x18440244

We consider the A4, S4 and A5 discrete lepton flavor symmetries broken down to nontrivial residual symmetries in the charged lepton and neutrino sectors in such a way that at least one of them is a Z2. Such symmetry breaking patterns lead to predicti... Read More about The A4, S4 and A5 flavor symmetries in light of data on neutrino mixing.

Absorptive effects and power corrections in low x DGLAP evolution (2019)
Journal Article
Pelicer, M., de Oliveira, E., Martin, A., & Ryskin, M. (2019). Absorptive effects and power corrections in low x DGLAP evolution. The European Physical Journal C, 79(1), Article 9. https://doi.org/10.1140/epjc/s10052-018-6515-4

We address a long standing problem concerning the scale behaviour of parton densities in the low x, low Q2 domain. We emphasize the important role of absorptive corrections at low x and use knowledge of diffractive deep inelastic scattering to exclud... Read More about Absorptive effects and power corrections in low x DGLAP evolution.

Goldstone modes and photonization for higher form symmetries (2019)
Journal Article
Hofman, D., & Iqbal, N. (2019). Goldstone modes and photonization for higher form symmetries. SciPost Physics, 6(1), Article 006. https://doi.org/10.21468/scipostphys.6.1.006

We discuss generalized global symmetries and their breaking. We extend Goldstone’s theorem to higher form symmetries by showing that a perimeter law for an extended p-dimensional defect operator charged under a continuous p-form generalized global sy... Read More about Goldstone modes and photonization for higher form symmetries.

Opening the energy window on direct dark matter detection (2018)
Journal Article
Bozorgnia, N., Cerdeño, D. G., Cheek, A., & Penning, B. (2018). Opening the energy window on direct dark matter detection. Journal of Cosmology and Astroparticle Physics, 2018(12), Article 013. https://doi.org/10.1088/1475-7516/2018/12/013

In this article we investigate the benefits of increasing the maximum nuclear recoil energy analysed in dark matter (DM) direct detection experiments. We focus on elastic DM-nucleus interactions, and work within the framework of effective field theor... Read More about Opening the energy window on direct dark matter detection.

Machine learning uncertainties with adversarial neural networks (2019)
Journal Article
Englert, C., Galler, P., Harris, P., & Spannowsky, M. (2019). Machine learning uncertainties with adversarial neural networks. The European Physical Journal C, 79(1), Article 4. https://doi.org/10.1140/epjc/s10052-018-6511-8

Machine Learning is a powerful tool to reveal and exploit correlations in a multi-dimensional parameter space. Making predictions from such correlations is a highly non-trivial task, in particular when the details of the underlying dynamics of a theo... Read More about Machine learning uncertainties with adversarial neural networks.