E-viri
PDF
Recenzirano
Odprti dostop
-
Aguilar, J. A.; Arguelles, C.; Auffenberg, J.; Baker, M.; Baum, V.; Becker, K.-H.; BenZvi, S.; Berghaus, P.; Bernardini, E.; Besson, D. Z.; Binder, G.; Bindig, D.; Bose, D.; Christov, A.; Classen, L.; Clevermann, F.; Cowen, D. F.; Danninger, M.; Davis, J. C.; De Clercq, C.; DeYoung, T.; Fazely, A. R.; Fedynitch, A.; Finley, C.; Flis, S.; Frantzen, K.; Gallagher, J.; Glüsenkamp, T.; Goldschmidt, A.; Golup, G.; Góra, D.; Groh, J. C.; Ha, C.; Haj Ismail, A.; Hallgren, A.; Heereman, D.; Helbing, K.; Hellauer, R.; Hickford, S.; Hoffmann, R.; Hoshina, K.; Hulth, P. O.; Hultqvist, K.; Jacobi, E.; Jacobsen, J.; Jagielski, K.; Japaridze, G. S.; Kaminsky, B.; Kappes, A.; Köpke, L.; Kriesten, A.; Kroll, G.; Kurahashi, N.; Kuwabara, T.; Larson, M. J.; Lesiak-Bzdak, M.; Macías, O.; Madsen, J.; Maggi, G.; Maruyama, R.; Matis, H. S.; McNally, F.; Merck, M.; Miarecki, S.; Naumann, U.; Niederhausen, H.; Nygren, D. R.; Olivas, A.; Omairat, A.; Pfendner, C.; Posselt, J.; Quinnan, M.; Rädel, L.; Richman, M.; Ruhe, T.; Sander, H.-G.; Schmidt, T.; Schoenen, S.; Schöneberg, S.; Sestayo, Y.; Soldin, D.; Stanisha, N. A.; Stokstad, R. G.; Ström, R.; Sullivan, G. W.; Taavola, H.; Taboada, I.; Tamburro, A.; Tešić, G.; Vehring, M.; Walck, C.; Wendt, C.; Wiebe, K.; Wolf, M.; Woschnagg, K.; Xu, X. W.; Yanez, J. P.; Ziemann, J.; Zierke, S.; Zoll, M.
The European physical journal. C, Particles and fields, 07/2014, Letnik: 74, Številka: 7Journal Article
The IceCube Neutrino Observatory is a large Cherenkov detector instrumenting 1 km 3 of Antarctic ice. The detector can be used to search for signatures of particle physics beyond the Standard Model. Here, we describe the search for non-relativistic, magnetic monopoles as remnants of the G rand U nified T heory (GUT) era shortly after the Big Bang. Depending on the underlying gauge group these monopoles may catalyze the decay of nucleons via the Rubakov–Callan effect with a cross section suggested to be in the range of 10 - 27 to 10 - 21 cm 2 . In IceCube, the Cherenkov light from nucleon decays along the monopole trajectory would produce a characteristic hit pattern. This paper presents the results of an analysis of first data taken from May 2011 until May 2012 with a dedicated slow-particle trigger for DeepCore, a subdetector of IceCube. A second analysis provides better sensitivity for the brightest non-relativistic monopoles using data taken from May 2009 until May 2010. In both analyses no monopole signal was observed. For catalysis cross sections of 10 - 22 ( 10 - 24 ) cm 2 the flux of non-relativistic GUT monopoles is constrained up to a level of Φ 90 ≤ 10 - 18 ( 10 - 17 ) cm - 2 s - 1 sr - 1 at a 90 % confidence level, which is three orders of magnitude below the Parker bound. The limits assume a dominant decay of the proton into a positron and a neutral pion. These results improve the current best experimental limits by one to two orders of magnitude, for a wide range of assumed speeds and catalysis cross sections.
