Outputs (6)

Gauge leptoquark as the origin of B-physics anomalies (2017)
Journal Article
Di Luzio, L., Greljo, A., & Nardecchia, M. (2017). Gauge leptoquark as the origin of B-physics anomalies. Physical Review D, 96(11), Article 115011. https://doi.org/10.1103/physrevd.96.115011

The vector leptoquark representation, Uμ ¼ ð3; 1; 2=3Þ, was recently identified as an exceptional single mediator model to address experimental hints on lepton flavor universality violation in semileptonic B-meson decays, both in neutral (b → sμμ) an... Read More about Gauge leptoquark as the origin of B-physics anomalies.

Window for preferred axion models (2017)
Journal Article
Di Luzio, L., Mescia, F., & Nardi, E. (2017). Window for preferred axion models. Physical Review D, 96(7), Article 075003. https://doi.org/10.1103/physrevd.96.075003

We discuss phenomenological criteria for defining “axion windows,” namely regions in the parameter space of the axion-photon coupling where realistic models live. Currently, the boundaries of this region depend on somewhat arbitrary criteria, and it... Read More about Window for preferred axion models.

What is the scale of new physics behind the B-flavour anomalies? (2017)
Journal Article
Di Luzio, L., & Nardecchia, M. (2017). What is the scale of new physics behind the B-flavour anomalies?. The European Physical Journal C, 77(8), Article 536. https://doi.org/10.1140/epjc/s10052-017-5118-9

Motivated by the recent hints of lepton flavour non-universality in B-meson semi-leptonic decays, we study the constraints of perturbative unitarity on the new physics interpretation of the anomalies in b→cℓν¯b→cℓν¯ and b→sℓℓ¯b→sℓℓ¯ transitions. With... Read More about What is the scale of new physics behind the B-flavour anomalies?.

Accidental Peccei-Quinn Symmetry Protected to Arbitrary Order (2017)
Journal Article
Di Luzio, L., Nardi, E., & Ubaldi, L. (2017). Accidental Peccei-Quinn Symmetry Protected to Arbitrary Order. Physical Review Letters, 119(1), Article 011801. https://doi.org/10.1103/physrevlett.119.011801

A SU(N)L×SU(N)R gauge theory for a scalar multiplet Y transforming in the bi-fundamental representation (N,N¯) preserves, for N>4, an accidental U(1) symmetry firstly broken at operator dimension N. Two configurations are possible for the vacuum expe... Read More about Accidental Peccei-Quinn Symmetry Protected to Arbitrary Order.

Redefining the Axion Window (2017)
Journal Article
Di Luzio, L., Mescia, F., & Nardi, E. (2017). Redefining the Axion Window. Physical Review Letters, 118(3), Article 031801. https://doi.org/10.1103/physrevlett.118.031801

A major goal of axion searches is to reach inside the parameter space region of realistic axion models. Currently, the boundaries of this region depend on somewhat arbitrary criteria, and it would be desirable to specify them in terms of precise phen... Read More about Redefining the Axion Window.

Implications of perturbative unitarity for scalar di-boson resonance searches at LHC (2017)
Journal Article
Di Luzio, L., Kamenik, J. F., & Nardecchia, M. (2017). Implications of perturbative unitarity for scalar di-boson resonance searches at LHC. The European Physical Journal C, 77(1), Article 30. https://doi.org/10.1140/epjc/s10052-017-4594-2

We study the constraints implied by partial wave unitarity on new physics in the form of spin-zero di-boson resonances at LHC. We derive the scale where the effective description in terms of the SM supplemented by a single resonance is expected to br... Read More about Implications of perturbative unitarity for scalar di-boson resonance searches at LHC.