We present the results of the first hadron collider search for heavy, long-lived neutralinos that decay via chi over tilde (0)(1)->gamma G over tilde in gauge-mediated supersymmetry breaking models. Using an integrated luminosity of 570 +/- 34 pb(-1) of p (p) over bar collisions at root s=1.96 TeV, we select gamma+jet+missing transverse energy candidate events based on the arrival time of a high-energy photon at the electromagnetic calorimeter as measured with a timing system that was recently installed on the CDF II detector. We find 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 and place the world-best 95% C.L. lower limit on the chi overtilde (0)(1) mass of 101 GeV/c(2) at tau((chi) overtilde (0)(1))=5 ns.

T., A., J., A., T., A., M. G., A., B. A., G., S., A., et al. (2008). Search for heavy, long-lived neutralinos that decay to photons at CDF II using photon timing. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 78(3), 032015-1-032015-29 [10.1103/PhysRevD.78.032015].

Search for heavy, long-lived neutralinos that decay to photons at CDF II using photon timing

CIOCCI, MARIA AGNESE;
2008-01-01

Abstract

We present the results of the first hadron collider search for heavy, long-lived neutralinos that decay via chi over tilde (0)(1)->gamma G over tilde in gauge-mediated supersymmetry breaking models. Using an integrated luminosity of 570 +/- 34 pb(-1) of p (p) over bar collisions at root s=1.96 TeV, we select gamma+jet+missing transverse energy candidate events based on the arrival time of a high-energy photon at the electromagnetic calorimeter as measured with a timing system that was recently installed on the CDF II detector. We find 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 and place the world-best 95% C.L. lower limit on the chi overtilde (0)(1) mass of 101 GeV/c(2) at tau((chi) overtilde (0)(1))=5 ns.
2008
T., A., J., A., T., A., M. G., A., B. A., G., S., A., et al. (2008). Search for heavy, long-lived neutralinos that decay to photons at CDF II using photon timing. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 78(3), 032015-1-032015-29 [10.1103/PhysRevD.78.032015].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/37492
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo