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Cornering diphoton resonance models at the LHC (2016)
Journal Article
Backović, M., Kulkarni, S., Mariotti, A., Sessolo, E. M., & Spannowsky, M. (2016). Cornering diphoton resonance models at the LHC. Journal of High Energy Physics, 2016(08), Article 018. https://doi.org/10.1007/jhep08%282016%29018

We explore the ability of the high luminosity LHC to test models which can explain the 750 GeV diphoton excess. We focus on a wide class of models where a 750 GeV singlet scalar couples to Standard Model gauge bosons and quarks, as well as dark matte... Read More about Cornering diphoton resonance models at the LHC.

Determining the quantum numbers of simplified models in tt¯X production at the LHC (2016)
Journal Article
Dolan, M. J., Spannowsky, M., Wang, Q., & Yu, Z. (2016). Determining the quantum numbers of simplified models in tt¯X production at the LHC. Physical Review D, 94(1), Article 015025. https://doi.org/10.1103/physrevd.94.015025

Simplified models provide an avenue for characterizing and exploring new physics for large classes of UV theories. In this article we study the ability of the LHC to probe the spin and parity quantum numbers of a new light resonance X which couples p... Read More about Determining the quantum numbers of simplified models in tt¯X production at the LHC.

Higgs coupling measurements at the LHC (2016)
Journal Article
Englert, C., Kogler, R., Schulz, H., & Spannowsky, M. (2016). Higgs coupling measurements at the LHC. The European Physical Journal C, 76(7), Article 393. https://doi.org/10.1140/epjc/s10052-016-4227-1

Due to the absence of tantalising hints for new physics during the LHC’s Run 1, the extension of the Higgs sector by dimension-six operators will provide the new phenomenological standard for searches of non-resonant extensions of the Standard Model.... Read More about Higgs coupling measurements at the LHC.

The Lepton Flavour Violating Higgs Decays at the HL-LHC and the ILC (2016)
Journal Article
Banerjee, S., Bhattacherjee, B., Mitra, M., & Spannowsky, M. (2016). The Lepton Flavour Violating Higgs Decays at the HL-LHC and the ILC. Journal of High Energy Physics, 2016(07), Article 059. https://doi.org/10.1007/jhep07%282016%29059

Run-I results from the CMS collaboration show an excess of events in the decay h → μτe with a local significances of 2.4σ. This could be the first hint of flavour violation in the Higgs sector. We summarise the bounds on the flavour violating Yukawa... Read More about The Lepton Flavour Violating Higgs Decays at the HL-LHC and the ILC.

Identification of high transverse momentum top quarks in pp collisions at s√=8s=8 TeV with the ATLAS detector (2016)
Journal Article
Spannowsky, M., & collaboration, A. (2016). Identification of high transverse momentum top quarks in pp collisions at s√=8s=8 TeV with the ATLAS detector. Journal of High Energy Physics, 2016(06), Article 093. https://doi.org/10.1007/jhep06%282016%29093

This paper presents studies of the performance of several jet-substructure techniques, which are used to identify hadronically decaying top quarks with high transverse momentum contained in large-radius jets. The efficiency of identifying top quarks... Read More about Identification of high transverse momentum top quarks in pp collisions at s√=8s=8 TeV with the ATLAS detector.

New physics and signal-background interference in associated pp → HZ production (2016)
Journal Article
Englert, C., Rosenfeld, R., Spannowsky, M., & Tonero, A. (2016). New physics and signal-background interference in associated pp → HZ production. European Physical Society Letters, 114(3), Article 31001. https://doi.org/10.1209/0295-5075/114/31001

We re-investigate electroweak signal-background interference in associated Higgs production via gluon fusion in the presence of new physics in the top Higgs sector. Considering the full final state $pp \to b \bar b \ell^+\ell^-~(\ell=e,\mu)$ , we dis... Read More about New physics and signal-background interference in associated pp → HZ production.

Search for Sphalerons: IceCube vs. LHC (2016)
Journal Article
Ellis, J., Sakurai, K., & Spannowsky, M. (2016). Search for Sphalerons: IceCube vs. LHC. Journal of High Energy Physics, 2016(05), Article 085. https://doi.org/10.1007/jhep05%282016%29085

We discuss the observability of neutrino-induced sphaleron transitions in the IceCube detector, encouraged by a recent paper by Tye and Wong (TW), which argued on the basis of a Bloch wave function in the periodic sphaleron potential that such transi... Read More about Search for Sphalerons: IceCube vs. LHC.

Closing up on Dark Sectors at colliders: from 14 to 100 TeV (2016)
Journal Article
Harris, P., Khoze, V. V., Spannowsky, M., & Williams, C. (2016). Closing up on Dark Sectors at colliders: from 14 to 100 TeV. Physical Review D, 93(5), Article 054030. https://doi.org/10.1103/physrevd.93.054030

-channel) messenger fields: scalar, pseudoscalar, vector or axial-vector. Our analysis extends and updates the previously available results for the LHC at 8 and 14 TeV to 100 TeV for models with all four messenger types. We revisit and improve the an... Read More about Closing up on Dark Sectors at colliders: from 14 to 100 TeV.

Measuring the Higgs-bottom coupling in weak boson fusion (2016)
Journal Article
Englert, C., Mattelaer, O., & Spannowsky, M. (2016). Measuring the Higgs-bottom coupling in weak boson fusion. Physics Letters B, 756, 103-108. https://doi.org/10.1016/j.physletb.2016.02.074

We study Higgs production through weak boson fusion with subsequent decay to bottom quarks. By combining jet substructure techniques and matrix element methods in different limits we motivate this channel as a probe of the bottom-Yukawa interactions... Read More about Measuring the Higgs-bottom coupling in weak boson fusion.

Measuring the signal strength in tt¯HwithH→bb¯ (2016)
Journal Article
Moretti, N., Petrov, P., Pozzorini, S., & Spannowsky, M. (2016). Measuring the signal strength in tt¯HwithH→bb¯. Physical Review D, 93(1), Article 014019. https://doi.org/10.1103/physrevd.93.014019

A precise measurement of the Higgs boson couplings to bottom and top quarks is of paramount importance during the upcoming LHC runs. We present a comprehensive analysis for the Higgs production process in association with a semileptonically decaying... Read More about Measuring the signal strength in tt¯HwithH→bb¯.

Probing MeV to 90 GeV axion-like particles with LEP and LHC (2015)
Journal Article
Jaeckel, J., & Spannowsky, M. (2016). Probing MeV to 90 GeV axion-like particles with LEP and LHC. Physics Letters B, 753, 482-487. https://doi.org/10.1016/j.physletb.2015.12.037

Axion-like particles (ALPs), relatively light (pseudo-)scalars coupled to two gauge bosons, are a common feature of many extensions of the Standard Model. Up to now there has been a gap in the sensitivity to such particles in the MeV to 10 GeV range.... Read More about Probing MeV to 90 GeV axion-like particles with LEP and LHC.

Combining LEP and LHC to bound the Higgs Width (2015)
Journal Article
Englert, C., McCullough, M., & Spannowsky, M. (2016). Combining LEP and LHC to bound the Higgs Width. Nuclear Physics B, 902, 440-457. https://doi.org/10.1016/j.nuclphysb.2015.11.017

The correlation of on- and off-shell Higgs boson production at the LHC in gg→h⁎→ZZgg→h⁎→ZZ has been used to bound the Higgs width. We propose an alternative complementary constraint which is only possible through the combination of LEP and LHC measur... Read More about Combining LEP and LHC to bound the Higgs Width.

Probing a light CP-odd scalar in di-top-associated production at the LHC (2015)
Journal Article
Casolino, M., Farooque, T., Juste, A., Liu, T., & Spannowsky, M. (2015). Probing a light CP-odd scalar in di-top-associated production at the LHC. The European Physical Journal C, 75, Article 498. https://doi.org/10.1140/epjc/s10052-015-3708-y

CP-odd scalars are an integral part of many extensions of the Standard Model. Recently, electroweak-scale pseudoscalars have received increased attention in explaining the diffuse gamma-ray excess from the Galactic Centre. Elusive due to absence of d... Read More about Probing a light CP-odd scalar in di-top-associated production at the LHC.

Spectroscopy of scalar mediators to dark matter at the LHC and at 100 TeV (2015)
Journal Article
Khoze, V. V., Ro, G., & Spannowsky, M. (2015). Spectroscopy of scalar mediators to dark matter at the LHC and at 100 TeV. Physical Review D, 92(7), Article 075006. https://doi.org/10.1103/physrevd.92.075006

We investigate simplified models of dark matter with scalar mediators at hadron colliders using the final state topology with two jets and missing energy. These models can arise in a wide variety of BSM scenarios including the possibility of the medi... Read More about Spectroscopy of scalar mediators to dark matter at the LHC and at 100 TeV.

Augmenting the diboson excess for the LHC Run II (2015)
Journal Article
Gonçalves, D., Krauss, F., & Spannowsky, M. (2015). Augmenting the diboson excess for the LHC Run II. Physical Review D, 92(5), https://doi.org/10.1103/physrevd.92.053010

The ATLAS collaboration recently reported an excess of events in the high invariant mass tail of reconstructed diboson events. We investigate their analysis and point to possible subtleties and improvements in the jet substructure implementation and... Read More about Augmenting the diboson excess for the LHC Run II.

Towards an Understanding of the Correlations in Jet Substructure (2015)
Journal Article
Adams, D., Arce, A., Asquith, L., Backovic, M., Barillari, T., Berta, P., …Young, C. (2015). Towards an Understanding of the Correlations in Jet Substructure. The European Physical Journal C, 75(9), Article 409. https://doi.org/10.1140/epjc/s10052-015-3587-2

Over the past decade, a large number of jet substructure observables have been proposed in the literature, and explored at the LHC experiments. Such observables attempt to utilize the internal structure of jets in order to distinguish those initiated... Read More about Towards an Understanding of the Correlations in Jet Substructure.

hhjj production at the LHC (2015)
Journal Article
Dolan, M. J., Englert, C., Greiner, N., Nordstrom, K., & Spannowsky, M. (2015). hhjj production at the LHC. The European Physical Journal C, 75(8), Article 387. https://doi.org/10.1140/epjc/s10052-015-3622-3

The search for di-Higgs production at the LHC in order to set limits on the Higgs trilinear coupling and constraints on new physics is one of the main motivations for the LHC high-luminosity phase. Recent experimental analyses suggest that such analy... Read More about hhjj production at the LHC.

Unitarity-controlled resonances after the Higgs boson discovery (2015)
Journal Article
Englert, C., Harris, P., Spannowsky, M., & Takeuchi, M. (2015). Unitarity-controlled resonances after the Higgs boson discovery. Physical Review D, 92(1), Article 013003. https://doi.org/10.1103/physrevd.92.013003

If the recently discovered Higgs boson’s couplings deviate from the Standard Model expectation, we may anticipate new resonant physics in the weak boson fusion channels resulting from high scale unitarity sum rules of longitudinal gauge boson scatter... Read More about Unitarity-controlled resonances after the Higgs boson discovery.