Search for heavy, long-lived particles that decay to photons in ppbar collisions at sqrt(s)=1.96 tev
This dissertation presents the results of the first search for heavy, neutral, longlived particles that decay to photons at a hadron collider. We use a sample of +jet+missing transverse energy events in p¯p collisions at ps = 1.96 TeV taken with the Collider Detector at Fermilab. Candidate events a...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Others |
| Language: | en_US |
| Published: |
2010
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/1969.1/ETD-TAMU-1962 http://hdl.handle.net/1969.1/ETD-TAMU-1962 |
| Summary: | This dissertation presents the results of the first search for heavy, neutral, longlived
particles that decay to photons at a hadron collider. We use a sample of
+jet+missing transverse energy events in p¯p collisions at ps = 1.96 TeV taken with
the Collider Detector at Fermilab. Candidate events are selected based on the arrival
time of a high-energy photon at the electromagnetic calorimeter as measured with a
timing system that was recently installed. The final result is that we find 2 events,
using 570±34 pb−1 of data collected during 2004-2005 at the Fermilab Tevatron, consistent
with the background estimate of 1.3±0.7 events. While our search strategy
does not rely on model-specific dynamics, we interpret this result in terms of cross
section limits in a supersymmetric model with e01!
eG and set a world-best e01
mass
reach of 101 GeV/c2 at e = 5 ns. We can exclude any
+jet+missing transverse
energy signal that would produce more than 5.5 events. |
|---|