Search for long-lived particles decaying to jet pairs

• Published in: The European physical journal. C, Particles and fields Vol. 75; no. 4; pp. 152 - 12
• Main Authors: Akar, S., Alkhazov, G., Andreassen, R., Appleby, R. B., Artuso, M., Auriemma, G., Bachmann, S., Baesso, C., Baldini, W., Barschel, C., Barter, W., Beaucourt, L., Borghi, S., Borgia, A., Bursche, A., Calvo Gomez, M., Capriotti, L., Carson, L., Chen, S., Coquereau, S., Counts, I., De Cian, M., De Miranda, J. M., Deschamps, O., Di Canto, A., Dreimanis, K., Egede, U., Elsasser, Ch, Evans, H.-M., Ferreira Rodrigues, F., Filippov, S., Fiutowski, T., Forty, R., Frosini, M., Furfaro, E., Garra Tico, J., Garrido, L., Gazzoni, G., Ghez, Ph, Gomes, A., Graugés, E., Greening, E., Griffith, P., Gys, T., Haefeli, G., Haines, S. C., He, J., Hill, D., Jaeger, A., Jawahery, A., Jurik, N., Kanso, W., Kreps, M., Kurek, K., Li, Y., Lionetto, F., Liu, B., Lucchesi, D., Luo, H., Lupato, A., Luppi, E., Martellotti, G., Martins Tostes, D., Mathe, Z., Mazurov, A., Milanes, D. A., Muheim, F., Naik, P., Nandakumar, R., Needham, M., Niet, R., Nikitin, N., O’Hanlon, D. P., Otalora Goicochea, J. M., Papanestis, A., Pearce, A., Pellegrino, A., Penso, G., Perret, P., Petrolini, A., Pistone, A., Reichert, S., Rives Molina, V., Robbe, P., Rodriguez Perez, P., Ruf, T., Savrina, D., Schmelling, M., Schune, M.-H., Serra, N., Smith, N. A., Straumann, U., Sun, L., Tomassetti, L., Trisovic, A., Tsopelas, P., Tuning, N., Vagnoni, V., Vecchi, S., Vesterinen, M.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.04.2015; Springer; Springer Nature B.V; Springer Verlag (Germany)
• Subjects: Astronomy; Astrophysics and Cosmology; Collisions (Nuclear physics); Cross sections; Decay; Detectors; Displacement; Elementary Particles; Hadrons; Heavy Ions; Higgs bosons; High Energy Physics - Experiment; Luminosity; Measurement Science and Instrumentation; Nuclear Energy; Nuclear Physics; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Regular - Experimental Physics; Regular Article - Experimental Physics; Searching; String Theory; Texts; Invariant Mass; Secondary Vertex; Systematic Uncertainty; Higgs Boson; Primary Vertex
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-015-3344-6

A search is presented for long-lived particles with a mass between 25 and 50  GeV / c 2 and a lifetime between 1 and 200 ps in a sample of proton–proton collisions at a centre-of-mass energy of s = 7  TeV, corresponding to an integrated luminosity of 0.62  fb - 1 , collected by the LHCb detector. The particles are assumed to be pair-produced by the decay of a standard model-like Higgs boson. The experimental signature of the long-lived particle is a displaced vertex with two associated jets. No excess above the background is observed and limits are set on the production cross-section as a function of the long-lived particle mass and lifetime.