Sezione INFN di Cagliari Theory Group |

*Mariano Cadoni, Parul Jain, Matteo Tuveri*

General relativity and extensions: Black holes; Minimally coupled Einstein-Maxwell-scalar theories; Entanglement entropy vs statistical entropy and thermodynamical entropy; Ultra-compact objects such as boson stars and wormholes; Gravitational waves. Cosmology: Models for inflation; Dark energy via holographic description. Holographic description: Black brane solutions; AdS/CFT correspondence; Domain-wall/cosmology correspondence; Fluid/gravity correspondence. Alternative approaches to GR: Emergent gravity.

*Umberto D'Alesio, Carlo Flore, Francesco Murgia, Cristian Pisano, Rajesh Sangem, Pieter Taels, Marco Zaccheddu*

An updated extraction of the quark transversity distribution and the Collins fragmentation function from recent SIDIS and $e^+e^-$ collision data. A new study of the potential contribution of the Sivers and Collins effects to the transverse single spin asymmetry in polarized $p p \to h X$ processes at large Feynman $x$. Study of the process dependence of the Sivers and Collins effects in polarized $p^\uparrow p \to\text{jet}\,\pi X$ processes. Study of transverse single spin asymmetries and TMD factorization in $\ell p \to\pi X$ processes. Study of TMD evolution and non-perturbative effects in transverse momentum spectra of Z-boson production in Drell-Yan.

*Salvatore Mignemi, Giacomo Rosati*

Theory and phenomenology of models with spacetime non-commutativity. A particularly strong effort is being devoted to the study of Snyder noncommutativity and other models which lend themselves to the study of the interplay between spacetime curvature and momentum-space curvature.

*Giuseppe D'Appollonio*

The Regge limit of inelastic string amplitudes at tree level, using both the light-cone Green-Schwarz vertex and the covariant Reggeon vertex operator. A precise interpretation of the eikonal operator through the explicit tree-level calculation of generic inelastic transitions between closed strings as they scatter off a stack of parallel $D_p$-branes.

*Piero Olla*

Microscopic swimming, with particular interest in the exploitation of external means (presence of an external flow, of thermal fluctuations, etc.) to aid propulsion. The dynamics of a population in an external flows, especially as regards the role of demographic fluctuations in the problem. Modelling of turbulence and turbulent transport by random fields.

Soliton theory; DNA dynamics. (*M. Cadoni*) ...

**NINPHA** https://web.infn.it/CSN4/IS/Linea3/NINPHA/

**QUAGRAP** https://web.infn.it/CSN4/IS/Linea5/QUAGRAP/

**FIELDTURB** https://web.infn.it/CSN4/IS/Linea6/FIELDTURB/

The **DARKSIDE** Collaboration http://darkside.lngs.infn.it/