65 citations · 328 across the 23 of their papers we have counts for
26 papers · 1 filter
All-Order Helicity Selection Rules in Effective Field Theories
Luigi C. Bresciani, Nudzeim Selimovic
Using on-shell methods, we derive an all-order non-renormalization theorem for general four-dimensional effective field theories, relying on Poincaré invariance and unitarity. Each…
Opening the Topological Portal to Dark Sectors with Colliders
Joe Davighi, Admir Greljo, Lia Schöneweiß +1
We study the phenomenology of the topological portal between QCD and pseudo-Nambu--Goldstone dark matter proposed in~\cite{Davighi:2024zip}. We construct a weakly coupled ultraviol…
Neutron Star Bounds on Muonic Fifth Forces from Picometer to Meter Scales
Damiano F. G. Fiorillo, Alessandro Lella, Georg G. Raffelt +2
Testing muonic fifth forces is difficult because muons are scarce in ordinary matter. However, they are abundant in neutron stars. We show that this population responds coherently…
Production of Leptophilic Bosons in Ultradegenerate Relativistic Matter
Damiano F. G. Fiorillo, Alessandro Lella, Georg G. Raffelt +2
Neutron stars (NSs) are powerful factories for new particles with masses up to the 100~keV range. These compact stars contain significant amounts of protons, electrons, and muons.…
Anomalous Dimension of a General Effective Gauge Theory II: Fermionic Sector
Jason Aebischer, Luigi C. Bresciani, Nudzeim Selimovic
The complete set of one-loop anomalous dimensions for general Effective Field Theories (EFTs) is derived using on-shell methods. Combined with previous findings for the bosonic sec…
Anarchic neutrinos from flavor deconstruction: phenomenology of the lepton sector
Gino Isidori, Paride Paradisi, Andrea Sainaghi +1
We investigate the neutrino sector in the framework of flavor deconstruction with an inverse-seesaw realization. This setup naturally links the hierarchical charged-fermion masses…
The Dark Side of a Tera-Z Factory
Pablo Olgoso, Paride Paradisi, Nudzeim Selimovic
The future circular collider (FCC-ee or CEPC) will provide unprecedented sensitivity to indirect new physics signals emerging as small deviations from the Standard Model p…
Topological Freeze-out by Semi-Annihilation
Joe Davighi, Serah Moldovsky, Hitoshi Murayama +2
We point out that a QCD-like dark sector can be coupled to the Standard Model by gauging the topological Skyrme current, which measures the dark baryon number in the infrared, to g…
Hunting for a 17 MeV particle coupled to electrons
Luca Di Luzio, Paride Paradisi, Nudzeim Selimovic
We discuss a set of precision observables that can probe the existence of a light particle coupled to electrons in the mass range of 1-100 MeV. As a case study, we consider the…
Probing New Physics with the Electron Yukawa coupling
Barbara Anna Erdelyi, Ramona Gröber, Nudzeim Selimovic
A dedicated run of a future electron-positron collider (FCC-ee) at a center-of-mass energy equal to the Higgs boson mass would enable a direct measurement of the electron Yukawa co…
Anomalous Dimension of a General Effective Gauge Theory I: Bosonic Sector
Jason Aebischer, Luigi C. Bresciani, Nudzeim Selimovic
We classify the physical operators of the most general bosonic effective gauge theory up to dimension six using on-shell methods. Based on this classification, we compute the compl…
How large can the Light Quark Yukawa couplings be?
Barbara Anna Erdelyi, Ramona Gröber, Nudzeim Selimovic
We investigate models that can induce significant modifications to the couplings of first- and second-generation quarks with Higgs bosons. Specifically, we identify all simplified…
Collider and astrophysical signatures of light scalars with enhanced couplings
Jorge Alda, Gabriele Levati, Paride Paradisi +2
Beyond Standard Model scenarios addressing the flavor puzzle and the hierarchy problem generally predict dominant new physics couplings with fermions of the third generation. In th…
Topological Portal to the Dark Sector
Joe Davighi, Admir Greljo, Nudzeim Selimovic
We propose a unique topological portal between quantum chromodynamics (QCD) and a dark sector characterized by a global symmetry breaking, which connects three QCD to two dark pion…
Third-Family Lepton-Quark Fusion
Arman Korajac, Peter Krack, Nudzeim Selimovic
We analyze the signatures of new physics scenarios featuring third-family quark-lepton unification at the TeV scale in lepton-quark fusion at hadron colliders. Working with complet…
Third-Family Quark-Lepton Unification and Electroweak Precision Tests
Lukas Allwicher, Gino Isidori, Javier M. Lizana +2
We analyze the compatibility of the hypothesis of third-family quark-lepton unification at the TeV scale with electroweak precision data, lepton flavor universality tests, and high…
Resonant leptoquark at NLO with POWHEG
Luca Buonocore, Admir Greljo, Peter Krack +4
Recent progress in calculating lepton density functions inside the proton and simulating lepton showers laid the foundations for precision studies of resonant leptoquark production…
Flavor Non-universal Vector Leptoquark Imprints in and Transitions
Òscar L. Crosas, Gino Isidori, Javier M. Lizana +2
We analyze rates in a model with a TeV-scale leptoquark addressing -meson anomalies, based on the flavor non-universal 4321 gauge group featuring third-generatio…
Flavor hierarchies, flavor anomalies, and Higgs mass from a warped extra dimension
Javier Fuentes-Martin, Gino Isidori, Javier M. Lizana +2
The recent B-meson anomalies are coherently explained at the TeV scale by 4321 gauge models with hierarchical couplings reminiscent of the Standard Model Yukawas. We show that such…
LFU violations in leptonic decays and B-physics anomalies
Lukas Allwicher, Gino Isidori, Nudzeim Selimovic
We present a complete analysis of Lepton Flavor Universality (LFU) violations in leptonic decays in motivated models addressing the -physics anomalies, based on the $SU(4)\t…
Corrections to models of B-physics decay anomalies
Nudzeim Selimovic
Motivated by the recent anomalies observed in semileptonic decays of B-mesons, the class of models denoted as "4321" is introduced and analysed. The importance of calculating next-…
Lepton-Quark Fusion at Hadron Colliders, precisely
Admir Greljo, Nudzeim Selimovic
When a TeV-scale leptoquark has a sizeable Yukawa coupling, its dominant production mechanism at hadron colliders is the partonic-level lepton-quark fusion. Even though the parton…
Vector Leptoquarks Beyond Tree Level III: Vector-like Fermions and Flavor-Changing Transitions
Javier Fuentes-Martin, Gino Isidori, Matthias König +1
Extending previous work on this subject, we evaluate the impact of vector-like fermions at next-to-leading order accuracy in models with a massive vector leptoquark embedded in the…
Vector Leptoquarks Beyond Tree Level II: Corrections and Radial Modes
Javier Fuentes-Martin, Gino Isidori, Matthias König +1
We clarify open issues in relating low- and high-energy observables, at next-to-leading order accuracy, in models with a massive leptoquark embedded in a flavor non-universal $SU(4…