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Improved dark matter search results from PICO-2L Run 2

2016; American Physical Society; Volume: 93; Issue: 6 Linguagem: Inglês

10.1103/physrevd.93.061101

2470-0037

C. Amole, M. Ardid, I. J. Arnquist, D. M. Asner, D. Baxter, E. Behnke, Pijushpani Bhattacharjee, H. Borsodi, M. Bou-Cabo, S. J. Brice, D. Broemmelsiek, K. Clark, J. I. Collar, P. S. Cooper, M. Crisler, C. E. Dahl, Mala Das, F. Debris, S. Fallows, J. Farine, I. Felis, R. Filgas, Mirjam Fines-Neuschild, F. Girard, G. Giroux, J. Hall, Orin Harris, E. W. Hoppe, C. M. Jackson, M. Jin, C. B. Krauss, M. Lafrenière, M. Laurin, I. Lawson, Alexandre Leblanc, I. Levine, W. H. Lippincott, E. Mann, J. P. Martin, Deepam Maurya, P. Mitra, Sarah H. Olson, R. Neilson, A. J. Noble, A. Plante, R. Podviianiuk, Shashank Priya, Alan Robinson, M. Ruschman, O. Scallon, A. Sonnenschein, N. Starinski, I. Štekl, E. Vázquez-Jáuregui, Joshua Wells, U. Wichoski, V. Zacek, J. Zhang,

Cosmology and Gravitation Theories

The PICO collaboration reports results obtained by PICO-2L Run-2 after carefully controlling for particulate contamination. The data clearly indicates that previously observed anomalies were due to contamination in the bubble chamber fluid. These observations set new bounds on spin-dependent scattering of dark matter, and help pave the way for larger scale experiments.