34 research outputs found
Macroscopic Strings and "Quirks" at Colliders
We consider extensions of the standard model containing additional heavy
particles ("quirks") charged under a new unbroken non-abelian gauge group as
well as the standard model. We assume that the quirk mass m is in the
phenomenologically interesting range 100 GeV--TeV, and that the new gauge group
gets strong at a scale Lambda < m. In this case breaking of strings is
exponentially suppressed, and quirk production results in strings that are long
compared to 1/Lambda. The existence of these long stable strings leads to
highly exotic events at colliders. For 100 eV < Lambda < keV the strings are
macroscopic, giving rise to events with two separated quirk tracks with
measurable curvature toward each other due to the string interaction. For keV <
Lambda < MeV the typical strings are mesoscopic: too small to resolve in the
detector, but large compared to atomic scales. In this case, the bound state
appears as a single particle, but its mass is the invariant mass of a quirk
pair, which has an event-by-event distribution. For MeV < Lambda < m the
strings are microscopic, and the quirks annihilate promptly within the
detector. For colored quirks, this can lead to hadronic fireball events with
10^3 hadrons with energy of order GeV emitted in conjunction with hard decay
products from the final annihilation.Comment: Added discussion of photon-jet decay, fixed minor typo
Compliance with EU Legislation in the Pre-accession Countries of South East Europe (2005–2011): A Fuzzy-set Qualitative Comparative Analysis
Analysis of pathogen distribution and drug resistance of nosocomial infections accompanied in patients with malignant tumor
Induction of benzo (a)pyrene monooxygenase in fish and the salmonella test as a tool for detecting mutagenic/carcinogenic xenobiotics in the aquatic environment
A novel large plasmid carrying multiple β-lactam resistance genes isolated from a Klebsiella pneumoniae strain
10.1046/j.1365-2672.2000.01069.xJournal of Applied Microbiology8861038-1048JAMI