A search is performed for heavy metastable particles that decay into jet pairs with a macroscopic lifetime (cτ∼1cm) in pp̄ collisions at √s=1.96TeV using data from the CDF II detector at Fermilab corresponding to an integrated luminosity of 3.2fb-1. To estimate the standard model background, a data-driven approach is used. Probability-density functions are constructed to model secondary vertices from known processes. No statistically significant excess is observed above the background. Limits on the production cross section in a hidden valley benchmark phenomenology are set for various Higgs boson masses as well as metastable particle masses and lifetimes. © 2012 American Physical Society.
Publication Source (Journal or Book title)
Physical Review D - Particles, Fields, Gravitation and Cosmology
Aaltonen, T., Alvarez González, B., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Appel, J., Apresyan, A., Arisawa, T., Artikov, A., Asaadi, J., Ashmanskas, W., Auerbach, B., Aurisano, A., Azfar, F., Badgett, W., Barbaro-Galtieri, A., Barnes, V., Barnett, B., Barria, P., Bartos, P., Bauce, M., Bauer, G., Bedeschi, F., Beecher, D., & Behari, S. (2012). Search for heavy metastable particles decaying to jet pairs in pp̄ collisions at √s=1.96TeV. Physical Review D - Particles, Fields, Gravitation and Cosmology, 85 (1) https://doi.org/10.1103/PhysRevD.85.012007