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Andrea Legramandi (Istituto Nazionale di Fisica Nucleare)21/05/2025, 09:40
In chaotic quantum systems the spectral form factor exhibits a universal linear ramp and plateau structure with superimposed erratic oscillations. The mean signal and the statistics of the noise can be probed by the moments of the spectral form factor, also known as higher-point spectral form factors. We identify saddle points in the SYK model that describe the moments during the ramp region....
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Lucrezia Ravera (Istituto Nazionale di Fisica Nucleare)21/05/2025, 09:55
I will explore some foundational aspects of supersymmetric field theories under the perspective of the Dressing Field Method (DFM), a new systematic tool to exhibit the gauge-invariant content of general-relativistic gauge field theories.
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First, I will show that the gauge-fixing conditions typically used to extract the degrees of freedom of the Rarita-Schwinger spinor-vector and gravitino... -
Valerio Descontus (Istituto Nazionale di Fisica Nucleare)21/05/2025, 10:25
The Double Copy relations are a set of correspondences between (super) gravitational and (super) Yang-Mills theories which allow one to compute tree-level n-graviton scattering amplitudes from tree-level n-gluon ones. We try to extend this paradigm to the off-shell case by attempting the construction of the Lagrangian of N=1 Supergravity using an N=1 Yang-Mills theory and a non-supersymmetric...
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Marcello Romano (IPhT, Saclay)21/05/2025, 10:40
We study the EFT of a Majorana massive spin-$\frac{3}{2}$ particle through consistency conditions derived from unitarity, causality and Lorentz invariance. We show that its mass cannot be parametrically lighter than the UV cutoff, unless all the interactions, both in the transverse and longitudinal sector, are tuned to gravity. Then we focus on the decoupling limit, which effectively projects...
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Mauro Giliberti (Istituto Nazionale di Fisica Nucleare, Università degli Studi di Firenze)21/05/2025, 11:25
In the last decades, the holographic principle has been a powerful ally in high-energy physics, both as a tool and as an insight.
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I will present how holography can be used in the context of nonperturbative analysis of QCD-like theories, providing examples of confinement and phase structure. I will focus on instances that do not require strong analytical control and can thus be tackled... -
Bruno Bucciotti (Scuola Normale Superiore di Pisa)21/05/2025, 11:40
The scattering of charged massless fermions on magnetic monopoles at low-energy in the s-wave presents a long-standing final state puzzle: it seems to be generally impossible to construct an outgoing state conserving all charges. Indeed, bosonizing the low-energy EFT, one is seemingly led to particles of fractional charge.
In this talk I describe this problem starting from a UV complete...
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Andrea Olzi (Istituto Nazionale di Fisica Nucleare)21/05/2025, 11:55
The rates of flavor-changing weak processes are crucial in determining the conditions of beta equilibrium in neutron stars and mergers, influencing the damping of oscillations, the stability of rotating pulsars, and the emission of gravitational waves. We derive a formula for these rates at nonzero temperature, to leading order in the Fermi coupling and exact in the QCD coupling. Utilizing a...
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Giacomo Santoni (Istituto Nazionale di Fisica Nucleare)22/05/2025, 17:10
We provide a new construction of superfield collinear twist-$2$ operators as infinite-dimensional, irreducible representations of the collinear superconformal algebra in the zero-coupling limit of $\mathcal{N}=1$ supersymmetric Yang-Mills (SYM) theory in a manifestly gauge-invariant and supersymmetric-covariant fashion.This construction makes manifest their mixing and renormalization...
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