ETD

Archivio digitale delle tesi discusse presso l'Università di Pisa

Tesi etd-08282019-112932


Tipo di tesi
Tesi di laurea magistrale
Autore
SERRA, FRANCESCO
URN
etd-08282019-112932
Titolo
Scalar and Vector Black Hole Hair: Myth or Reality?
Dipartimento
FISICA
Corso di studi
FISICA
Relatori
relatore Prof. Trincherini, Enrico
Parole chiave
  • vector-tensor theories
  • shift symmetric scalar field
  • scalar-tensor theories
  • no-hair theorems
  • no-hair conjecture
  • massive vector field
  • General Relativity
  • effective field theory
  • black holes
  • black hole hair
Data inizio appello
18/09/2019
Consultabilità
Completa
Riassunto
With the recent successes and the future prospects in gravitational interferometry, the study of black hole hair gains today a strong phenomenological motivation.
Investigating the presence of hair within the framework of effective field theory is particularly convenient in order to capture the relevant low energy features of generic models describing gravity coupled to additional fields.

The present work follows this line of research, focusing on shift symmetric scalar-tensor models and vector-tensor models.

In the scalar context, I review a recent, rather general no-hair theorem and I analyse its possible violations, till date only partially understood. In doing so I present an original way to evade the theorem, that is having non-vanishing hair at infinity in an asymptotically flat space-time.
Throughout the work I examine whether or not the various hairy solutions violating the theorem are acceptable from the effective field theory point of view.

Moreover, motivated by a connection between shift symmetric scalar-tensor and vector-tensor models, I study to which extent the scalar no-hair theorem can be translated to the vector case.

The same connection makes possible to analyse the newly-found class of scalar hairy solutions and its vector counterpart at the same time.
Studying this class provides new information about the violations of the scalar no-hair theorem and helps to rethink certain common beliefs regarding vector hair.
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