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Behavior of composite resonances breaking lepton flavor universality (2018)
Journal Article
Chala, M., & Spannowsky, M. (2018). Behavior of composite resonances breaking lepton flavor universality. Physical Review D, 98(3), Article 035010. https://doi.org/10.1103/physrevd.98.035010

Within the context of composite Higgs models, recent hints on lepton flavor nonuniversality in B decays can be explained by a vector resonance V with sizeable couplings to the Standard Model leptons ( ℓ ). We argue that, in such a case, spin- 1 / 2 l... Read More about Behavior of composite resonances breaking lepton flavor universality.

Signals of the electroweak phase transition at colliders and gravitational wave observatories (2018)
Journal Article
Chala, M., Krause, C., & Nardini, G. (2018). Signals of the electroweak phase transition at colliders and gravitational wave observatories. Journal of High Energy Physics, 2018(07), Article 062. https://doi.org/10.1007/jhep07%282018%29062

If the electroweak phase transition (EWPT) is of strongly first order due to higher dimensional operators, the scale of new physics generating them is at the TeV scale or below. In this case the effective-field theory (EFT) neglecting operators of di... Read More about Signals of the electroweak phase transition at colliders and gravitational wave observatories.

Searches for vector-like quarks at future colliders and implications for composite Higgs models with dark matter (2018)
Journal Article
Chala, M., Gröber, R., & Spannowsky, M. (2018). Searches for vector-like quarks at future colliders and implications for composite Higgs models with dark matter. Journal of High Energy Physics, 2018(3), Article 040. https://doi.org/10.1007/jhep03%282018%29040

Many composite Higgs models predict the existence of vector-like quarks with masses outside the reach of the LHC, e.g. m Q ≳ 2 TeV, in particular if these models contain a dark matter candidate. In such models the mass of the new resonances is bounde... Read More about Searches for vector-like quarks at future colliders and implications for composite Higgs models with dark matter.