Daniele Teresi

Publications : 94
Aldex : 40
H-index : 21
Citations : 1020

Axion quality from the (anti)symmetric of SU(N)

Marco Ardu, Jin-Wei Wang et 5 al.

Jul 24, 2020 in Arxiv
We propose two models where a U(1) Peccei-Quinn global symmetry arises accidentally and is respected up to high-dimensional operators, so that the axion solution to the strong CP problem is successful even in the presence of Planck-suppressed operators. One model is SU$(N)$ gauge interactions with fermions in the fundamental and a scalar in the symmetric. The axion arises from spontaneous symmetry...

TF08 Snowmass Report: BSM Model Building

Patrick J. Fox, Jure Zupan et 55 al.

Oct 6, 2022 in Arxiv
We summarize the state of Beyond the Standard Model (BSM) model building in particle physics for Snowmass 2021, focusing mainly on several whitepaper contributions to BSM model building (TF08) and closely related areas.

Mass Bounds on Light and Heavy Neutrinos from Radiative MFV Leptogenesis

Apostolos Pilaftsis, Daniele Teresi

Jun 26, 2015 in Arxiv
We derive novel limits on the masses of the light and heavy Majorana neutrinos by requiring successful leptogenesis in seesaw models of minimal flavour violation (MFV). Taking properly into account radiative flavour effects and avoiding the limitations due to a no-go theorem on leptonic asymmetries, we find that the mass of the lightest of the observable neutrinos must be smaller than $\sim 0.05$ ...

dE/dx from boosted long-lived particles

Gian F. Giudice et 3 al.

May 9, 2022 in Arxiv
At colliders massive long-lived charged particles could be revealed through their anomalously large ionisation energy loss $dE/dx$. In this paper we explore a class of scenarios in which the LLPs are particularly boosted, owing to production from the decay of a heavy parent resonance. Such scenarios give rise to unique signatures as compared to traditionally considered $dE/dx$ new-physics benchmar...

Relaxing the Higgs mass and its vacuum energy by living at the top of the potential

Alessandro Strumia, Daniele Teresi

Feb 6, 2020 in Arxiv
We consider an ultra-light scalar coupled to the Higgs in the presence of heavier new physics. In the electroweak broken phase the Higgs gives a tree-level contribution to the light-scalar potential, while new physics contributes at loop level. Thereby, the theory has a cosmologically meta-stable phase where the light scalar is around the top of its potential, and the Higgs is a loop factor lighte...

Cosmological constant: relaxation vs multiverse

Alessandro Strumia, Daniele Teresi

Apr 16, 2019 in Arxiv
We consider a scalar field with a bottom-less potential, such as $g^3 \phi$, finding that cosmologies unavoidably end up with a crunch, late enough to be compatible with observations if $g ≲ 1.2 H_0^{2/3} M_{\rm Pl}^{1/3}$. If rebounces avoid singularities, the multiverse acquires new features; in particular probabilities avoid some of the usual ambiguities. If rebounces change the vacuum energy b...

Dark Matter as dark dwarfs and other macroscopic objects: multiverse relics?

Christian Gross et 4 al.

May 6, 2021 in Arxiv
First-order phase transitions can leave relic pockets of false vacua and their particles, that manifest as macroscopic Dark Matter. We compute one predictive model: a gauge theory with a dark quark relic heavier than the confinement scale. During the first-order phase transition to confinement, dark quarks remain in the false vacuum and get compressed, forming Fermi balls that can undergo gravitat...

Super-cool Dark Matter

Thomas Hambye et 3 al.

May 3, 2018 in Arxiv
In dimension-less theories of dynamical generation of the weak scale, the Universe can undergo a period of low-scale inflation during which all particles are massless and super-cool. This leads to a new mechanism of generation of the cosmological Dark Matter (DM) relic density: super-cooling can easily suppress the amount of DM to the desired level. This is achieved for TeV-scale DM, if super-cool...

A Clockwork WIMP

Thomas Hambye et 3 al.

Dec 19, 2016 in Arxiv
We embed a thermal dark matter (DM) candidate within the clockwork framework. This mechanism allows to stabilize the DM particle over cosmological time because it suppresses its decay into Standard Model (SM) particles. At the same time, pair annihilations are unsuppressed, so that the relic density is set by the usual freeze-out of the DM particle from the thermal bath. The slow decay of the DM c...

Asymmetric Dark Matter in the Sun and the Diphoton Excess at the LHC

P. S. Bhupal Dev, Daniele Teresi

Dec 22, 2015 in Arxiv
It has been recently pointed out that a momentum-dependent coupling of the asymmetric Dark Matter (ADM) with nucleons can explain the broad disagreement between helioseismological observables and the predictions of standard solar models. In this paper, we propose a minimal simplified ADM model consisting of a scalar and a pseudoscalar mediator, in addition to a Dirac fermionic DM, for generating s...

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