Title
|
|
|
|
Search for heavy long-lived particles that decay to photons at CDF II
|
|
Author
|
|
|
|
|
|
Institution/Organisation
|
|
|
|
CDF Collaboration
|
|
Abstract
|
|
|
|
We present the first search for heavy, long-lived particles that decay to photons at a hadron collider. We use a sample of γ+jet+missing transverse energy events in pp̅ collisions at √s=1.96 TeV taken with the CDF II detector. Candidate events are selected based on the arrival time of the photon at the detector. Using an integrated luminosity of 570 pb-1 of collision data, we observe 2 events, consistent with the background estimate of 1.3±0.7 events. While our search strategy does not rely on model-specific dynamics, we set cross section limits in a supersymmetric model with χ10→γG and place the world-best 95% C.L. lower limit on the χ10 mass of 101 GeV/c2 at τχ10=5 ns. |
|
|
Language
|
|
|
|
English
|
|
Source (journal)
|
|
|
|
Physical review letters. - New York, N.Y., 1958, currens
|
|
Publication
|
|
|
|
New York, N.Y.
:
American Physical Society
,
2007
|
|
ISSN
|
|
|
|
0031-9007
[print]
1079-7114
[online]
|
|
DOI
|
|
|
|
10.1103/PHYSREVLETT.99.121801
|
|
Volume/pages
|
|
|
|
99
:12
(2007)
, p. 121801,1-121801,7
|
|
ISI
|
|
|
|
000249668000020
|
|
Full text (Publisher's DOI)
|
|
|
|
|
|
Full text (open access)
|
|
|
|
|
|