The Relic Abundance of Long-lived Heavy Colored Particles

Abstract

Long-lived colored particles with masses m > 200 GeV are allowed by current accelerator searches, and are predicted by a number of scenarios for physics beyond the standard model. We argue that such "heavy partons'' effectively have a geometrical cross section (of order 10 mb) for annihilation at temperatures below the QCD deconfinement transition. The annihilation process involves the formation of an intermediate bound state of two heavy partons with large orbital angular momentum. The bound state subsequently decays by losing energy and angular momentum to photon or pion emission, followed by annihilation of the heavy partons. This decay occurs before nucleosynthesis for m < 10^{11} GeV for electrically charged partons and m < TeV for electrically neutral partons. This implies that heavy parton lifetimes as long as 10^{14} sec are allowed even for heavy partons with m ~ TeV decaying to photons or hadrons with significant branching fraction.

13 pages, 4 figures. Minor revisions

References in corpus (1)

• Stable Massive Particles at Colliders

Cited by in corpus (29)

• Asymmetric Dark Matter from Leptogenesis
• Big Bang Nucleosynthesis as a Probe of New Physics
• Redefining the Axion Window
• Dark Matter Candidates - Axions, Neutralinos, Gravitinos, and Axinos
• A Pure-Glue Hidden Valley I. States and Decays
• SIMPle Dark Matter: Self-Interactions and keV Lines
• On the Feasibility of a Stop NLSP in Gravitino Dark Matter Scenarios
• Dark Matter as a weakly coupled Dark Baryon
• The number density of a charged relic
• Effects of QCD bound states on dark matter relic abundance
• A theory of extra radiation in the Universe
• Dark Matter Through the Neutrino Portal
• WIMPless Dark Matter from Non-Abelian Hidden Sectors with Anomaly-Mediated Supersymmetry Breaking
• Effect of Long-lived Strongly Interacting Relic Particles on Big Bang Nucleosynthesis
• Dark matter astrometry at underground detectors with multiscatter events
• Higgs Parity, Strong CP, and Dark Matter
• Neutron star observations of pseudoscalar-mediated dark matter
• Phenomenology of iQuarkonium
• Quirks in supersymmetry with gauge coupling unification
• Destruction of 7Be in big bang nucleosynthesis via long-lived sub-strongly interacting massive particles as a solution to the Li problem
• Current and future gamma-ray searches for dark-matter annihilation beyond the unitarity limit
• The Relic Abundance of Massive Colored Particles after a Late Hadronic Annihilation Stage
• The Quality/Cosmology Tension for a Post-Inflation QCD Axion
• The Type II Dirac Seesaw Portal to the mirror sector: Connecting neutrino masses and a solution to the strong CP problem
• Catalogues of Cosmologically Self-Consistent Hadronic QCD Axion Models
• WIMP Dark Matter in the U$\mu \nu$SSM
• The Smallest SU($N$) Hadrons
• Do Incomplete GUT Multiplets Always Spoil Unification?
• Muon g-2 from Millicharged Hidden Confining Sector