Zobrazeno 1 - 10
of 119
pro vyhledávání: '"Quevillon, Jérémie"'
Anomalous parity violation in four dimensions would be significant for phenomenology (baryogenesis, gravitational waves) and mathematical physics. Over the past decade, there has been a controversy in the literature as to whether free Weyl fermions g
Externí odkaz:
http://arxiv.org/abs/2411.00571
We derive constraints on the four dimensional energy-momentum tensor from gravitational and gauge anomalies. Our work can be considered an extension of Duff's analysis [1] to include parity-odd terms and explicit symmetry breaking. The constraints im
Externí odkaz:
http://arxiv.org/abs/2312.13222
Autor:
Buccioni, Federico, Devoto, Federica, Djouadi, Abdelhak, Ellis, John, Quevillon, Jérémie, Tancredi, Lorenzo
Publikováno v:
Physics Letters B, Volume 851, April 2024, 138596
The ATLAS and CMS collaborations at the LHC have recently announced evidence for the rare Higgs boson decay into a $Z$ boson and a photon. We analyze the interference between the process $gg\! \to \! H \! \to \! Z \gamma$ induced by loops of heavy pa
Externí odkaz:
http://arxiv.org/abs/2312.12384
Publikováno v:
Phys. Rev. Lett. 132, 211802 (2024)
In this work we propose reactoscope, a novel experimental setup for axion-like particle (ALP) searches. Nuclear reactors produce a copious number of photons, a fraction of which could convert into ALPs via Primakoff process in the reactor core. The g
Externí odkaz:
http://arxiv.org/abs/2310.03631
Publikováno v:
JHEP 12 (2023) 064
We compute the trace, diffeomorphism and Lorentz anomalies of a free Weyl fermion in a gravitational background field by path integral methods. This is achieved by regularising the variation of the determinant of the Weyl operator building on earlier
Externí odkaz:
http://arxiv.org/abs/2309.08670
We show that the QCD axion couples to the electromagnetic kinetic term at one loop. The result is that if axions make up dark matter, they induce temporal variation of the fine structure constant $\alpha$, which is severely constrained. We recast the
Externí odkaz:
http://arxiv.org/abs/2307.10362
Autor:
Larue, Rémy, Quevillon, Jérémie
We complete the so-called Universal One-Loop Effective Action (UOLEA) with effects of gravity and provide a systematic approach to incorporate higher dimensional operators in curved spacetime. The functional determinant stemming from the path integra
Externí odkaz:
http://arxiv.org/abs/2303.10203
The Effective Field Theory (EFT) Lagrangian for a generic axion-like particle (ALP) has many free parameters, and leaves quite some freedom for the expected phenomenology. In this work, we set up more constrained EFTs by enforcing true axion-like pro
Externí odkaz:
http://arxiv.org/abs/2211.04489
Publikováno v:
Phys.Rev.D 107 (2023) 2, 025017
The path-integral measure of a gauge-invariant fermion theory is transformed under the chiral transformation and leads to an elegant derivation of the anomalous chiral Ward-Takahashi identities, as we know from the seminal work of Fujikawa. We presen
Externí odkaz:
http://arxiv.org/abs/2205.02248
Publikováno v:
JHEP 08 (2022) 137
In this paper, we discuss the construction of Effective Field Theories (EFTs) in which a chiral fermion, charged under both gauge and global symmetries, is integrated out. Inspired by typical axion models, these symmetries can be spontaneously broken
Externí odkaz:
http://arxiv.org/abs/2112.00553