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Title: A Search for Long-Lived Neutral Particles Decaying to Dijets with the CMS detector at the Large Hadron Collider
Authors: Zuranski, Andrzej Maciej
Advisors: Marlow, Daniel R
Contributors: Physics Department
Keywords: dijets
displaced vertex
hidden valley
Subjects: Particle physics
Issue Date: 2014
Publisher: Princeton, NJ : Princeton University
Abstract: A search is performed for long-lived massive neutral particles decaying to quark-antiquark pairs. The experimental signature is a distinctive topology of a pair of hadronic jets originating at a secondary vertex. Events were collected by the CMS detector at the LHC during pp collisions at sqrt(s) = 8 TeV, and selected from data samples corresponding to 18.5/fb of integrated luminosity. No significant excess is observed above Standard Model expectations and an upper limit is set with 95% confidence level on the production cross section of a heavy scalar particle, H0, in the mass range 200 to 1000 GeV, decaying into a pair of long-lived neutral X0 particles in the mass range 50 to 350 GeV, where each of the X0 particles decay to quark-antiquark pairs. For X0 mean proper lifetimes of 0.1 to 200 cm, the upper limits are typically 0.5-200 fb.
Alternate format: The Mudd Manuscript Library retains one bound copy of each dissertation. Search for these copies in the library's main catalog
Type of Material: Academic dissertations (Ph.D.)
Language: en
Appears in Collections:Physics

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