We present the first search for heavy, long-lived particles that decay to photons at a hadron collider. We use a sample of gamma+jet+missing transverse energy events in p (p) over bar collisions at root 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 (chi) over tilde (0)(1)->gamma (G) over tilde and place the world-best 95% C.L. lower limit on the (chi) over tilde (0)(1) mass of 101 GeV/c(2) at tau((chi) over tilde (0)(1))=5 ns.

A., A., J., A., T., A., T., A., M. G., A., S., A., et al. (2007). Search for heavy long-lived particles that decay to photons at CDF II. PHYSICAL REVIEW LETTERS, 99(12), 121801-1-121801-7 [10.1103/PhysRevLett.99.121801].

Search for heavy long-lived particles that decay to photons at CDF II

CIOCCI, MARIA AGNESE;
2007-01-01

Abstract

We present the first search for heavy, long-lived particles that decay to photons at a hadron collider. We use a sample of gamma+jet+missing transverse energy events in p (p) over bar collisions at root 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 (chi) over tilde (0)(1)->gamma (G) over tilde and place the world-best 95% C.L. lower limit on the (chi) over tilde (0)(1) mass of 101 GeV/c(2) at tau((chi) over tilde (0)(1))=5 ns.
2007
A., A., J., A., T., A., T., A., M. G., A., S., A., et al. (2007). Search for heavy long-lived particles that decay to photons at CDF II. PHYSICAL REVIEW LETTERS, 99(12), 121801-1-121801-7 [10.1103/PhysRevLett.99.121801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/36262
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