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19922026
most citedObservation of Gravitational Waves from a Binary Black Hole Merger

14.2k citations

Showing 2021 · hep-phShow all

27 papers · 2 filters

hep-ph2021★ 24 cited

New physics behind the new muon -2 puzzle?

Luca Di Luzio, Antonio Masiero, Paride Paradisi +1

The recent measurement of the muon -2 at Fermilab confirms the previous Brookhaven result. The leading hadronic vacuum polarization (HVP) contribution to the muon -2 represen…

hep-ph2021★ 19 cited

Hadronic vacuum polarization contributions to the muon -2 in the space-like region

Elisa Balzani, Stefano Laporta, Massimo Passera

We present simple analytic expressions to compute the hadronic vacuum polarization contribution to the muon -2 in the space-like region up to next-to-next-to-leading order. Thes…

hep-ph2021★ 15 cited

Leptonic Meson Decays into Invisible ALP

Jorge Alda Gallo, Alfredo Walter Mario Guerrera, Siannah Peñaranda +1

The theoretical calculation of pseudo-scalar leptonic decay widths into an invisible ALP, , is reviewed. Assuming generic flavour-conserving ALP couplings…

hep-ph2021★ 36 cited

Flavor Violating Axions in the Early Universe

Francesco D'Eramo, Seokhoon Yun

Flavor violating axion couplings can be in action before recombination, and they can fill the early universe with an additional radiation component. Working within a model-independ…

hep-ph2021★ 37 cited

Probing the axion-nucleon coupling with the next generation of axion helioscopes

Luca Di Luzio, Javier Galan, Maurizio Giannotti +8

A finite axion-nucleon coupling, nearly unavoidable for QCD axions, leads to the production of axions via the thermal excitation and subsequent de-excitation of Fe-57 isotopes in t…

hep-ph2021★ 10 cited

Gegenbauer Goldstones

Gauthier Durieux, Matthew McCullough, Ennio Salvioni

We investigate radiatively stable classes of pseudo-Nambu-Goldstone boson (pNGB) potentials for approximate spontaneously broken . Using both the…

hep-ph2021★ 22 cited

Dark gauge boson production from neutron stars via nucleon-nucleon bremsstrahlung

Chang Sub Shin, Seokhoon Yun

We discuss the dark gauge boson emission from neutron stars via nucleon-nucleon bremsstrahlung. Through the rigorous treatment of the effective field theory prescription and the th…

hep-ph2021★ 50 cited

Freeze-in from Preheating

Marcos A. G. Garcia, Kunio Kaneta, Yann Mambrini +2

We consider the production of dark matter during the process of reheating after inflation. The relic density of dark matter from freeze-in depends on both the energy density and en…

hep-ph2021★ 53 cited

Stellar Evolution confronts Axion Models

Luca Di Luzio, Marco Fedele, Maurizio Giannotti +2

Axion production from astrophysical bodies is a topic in continuous development, because of theoretical progress in the estimate of stellar emission rates and, especially, because…

hep-ph2021★ 4 cited

Using Machine Learning techniques in phenomenological studies in flavour physics

Jorge Alda, Jaume Guasch, Siannah Penaranda

An updated analysis of New Physics violating Lepton Flavour Universality, by using the Standard Model Effective Field Lagrangian with semileptonic dimension six operators at $Λ= 1\…

hep-ph2021★ 61 cited

Thermal QCD Axions across Thresholds

Francesco D'Eramo, Fazlollah Hajkarim, Seokhoon Yun

Thermal axion production in the early universe goes through several mass thresholds, and the resulting rate may change dramatically across them. Focusing on the KSVZ and DFSZ frame…

hep-ph2021★ 62 cited

Thermal axion production at low temperatures: a smooth treatment of the QCD phase transition

Francesco D'Eramo, Fazlollah Hajkarim, Seokhoon Yun

We study thermal axion production around the confinement scale. At higher temperatures, we extend current calculations to account for the masses of heavy quarks, whereas we quantif…

hep-ph2021★ 4 cited

Probing Virtual ALPs by Precision Phase Measurements: Time-Varying Magnetic Field Background

Mohammad Sharifian, Moslem Zarei, Mehdi Abdi +2

We propose an experimental scheme for detecting the effects of off-shell axion-like particles (ALPs) through optical cavities. In this proposed experiment, linearly polarized photo…

hep-ph2021★ 13 cited

Flavour and CP symmetries in the inverse seesaw

C. Hagedorn, J. Kriewald, J. Orloff +1

We consider an inverse seesaw mechanism of neutrino mass generation in which the Standard Model is extended by (heavy) sterile states, and endowed with a flavour symmetry $G_…

hep-ph2021★ 23 cited

Super-Soft CP Violation

Alessandro Valenti, Luca Vecchi

Solutions of the Strong CP Problem based on the spontaneous breaking of CP must feature a non-generic structure and simultaneously explain a coincidence between a priori unrelated…

hep-ph2021★ 65 cited

Axion Dark Matter in the Time of Primordial Black Holes

Nicolás Bernal, Fazlollah Hajkarim, Yong Xu

We investigate the production of QCD axion dark matter in a nonstandard cosmological era triggered by primordial black holes (PBHs) that fully evaporate before the onset of BBN. Ev…

hep-ph2021

Axion Quality Straight from the GUT

Luca Vecchi

Composite axion scenarios offer a robust field theoretic justification for the existence of a Peccei-Quinn symmetry of high quality. We present a new class of realizations that are…

hep-ph2021★ 4 cited

Two-Loop Four-Fermion Scattering Amplitude in QED

R. Bonciani, A. Broggio, S. Di Vita +9

We present the analytic evaluation of the two-loop corrections to the amplitude for the scattering of four fermions in Quantum Electrodynamics, , with…

hep-ph2021★ 22 cited

What is the scale of new physics behind the muon ?

Lukas Allwicher, Luca Di Luzio, Marco Fedele +2

We study the constraints imposed by perturbative unitarity on the new physics interpretation of the muon anomaly. Within a Standard Model Effective Field Theory (SMEFT) appro…

hep-ph2021★ 1 cited

Two-photon exchange in leptophilic dark matter scenarios

Raghuveer Garani, Federico Gasparotto, Pierpaolo Mastrolia +3

In leptophilic scenarios, dark matter interactions with nuclei, relevant for direct detection experiments and for the capture by celestial objects, could only occur via loop-induce…

hep-ph2021★ 37 cited

The CKM Phase and in Nelson-Barr Models

Alessandro Valenti, Luca Vecchi

We analyze the Nelson-Barr approach to the Strong CP Problem. We derive the necessary conditions in order to simultaneously reproduce the CKM phase and the quark masses. Then we qu…

hep-ph2021★ 36 cited

High-energy EFT probes with fully differential Drell-Yan measurements

Giuliano Panico, Lorenzo Ricci, Andrea Wulzer

We study the potential of fully-differential measurements of high-energy dilepton cross-sections at the LHC to probe heavy new physics encapsulated in dimension-6 interaction opera…

hep-ph2021

Virtual corrections to via a transverse momentum expansion

Lina Alasfar, Giuseppe Degrassi, Pier Paolo Giardino +2

We compute the next-to-leading virtual QCD corrections to the partonic cross section of the production of a Higgs boson in association with a boson in gluon fusion. The calcula…

hep-ph2021★ 3 cited

Scalar and fermion on-shell amplitudes in generalized Higgs effective field theory

Ryo Nagai, Masaharu Tanabashi, Koji Tsumura +1

Beyond standard model (BSM) particles should be included in effective field theory in order to compute the scattering amplitudes involving these extra particles. We formulate an ex…