ETD

Archivio digitale delle tesi discusse presso l'Università di Pisa

Tesi etd-06032018-120128


Tipo di tesi
Tesi di laurea magistrale
Autore
DE LUCA, VALERIO
URN
etd-06032018-120128
Titolo
COLORED DARK MATTER
Dipartimento
FISICA
Corso di studi
FISICA
Relatori
relatore Prof. Strumia, Alessandro
Parole chiave
  • fall cross section
  • cosmological evolution
  • Bound states
  • Larmor power
Data inizio appello
25/06/2018
Consultabilità
Completa
Riassunto
We explore the possibility that Dark Matter is the lightest hadron made of two stable color octet Dirac fermions Q. The cosmological DM abundance is reproduced for MQ ≈ 12.5 TeV, compatibly with direct searches (the Rayleigh cross section, suppressed by 1/MQ^6 , is close to present bounds), indirect searches (enhanced by bound states recombination), and with collider searches (where Q manifests as tracks, pair produced via QCD). Hybrid hadrons, made of Q and of SM quarks and gluons, have large QCD cross sections, and do not reach underground detectors. Their cosmological abundance is 10^4 times smaller than DM, such that their unusual signals seem compatible with bounds. Those in the Earth and stars sank to their centers; the Earth crust and meteorites later accumulate a secondary abundance, although their present abundance depends on nuclear and geological properties that we cannot compute from first principles.
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