학술논문
First measurement of the temperature dependence of muon transfer rate from muonic hydrogen atoms to oxygen
Document Type
Working Paper
Author
FAMU Collaboration; Mocchiutti, E.; Adamczak, A.; Bakalov, D.; Baldazzi, G.; Benocci, R.; Bertoni, R.; Bonesini, M.; Bonvicini, V.; Morales, H. Cabrera; Chignoli, F.; Clemenza, M.; Colace, L.; Danailov, M.; Danev, P.; de Bari, A.; De Vecchi, C.; De Vincenzi, M.; Furlanetto, E.; Fuschino, F.; Gadedjisso-Tossou, K. S.; Guffanti, D.; Ishida, K.; Labanti, C.; Maggi, V.; Mazza, R.; Menegolli, A.; Morgante, G.; Nastasi, M.; Niemela, J.; Pizzolotto, C.; Pullia, A.; Ramponi, R.; Rignanese, L. P.; Rossella, M.; Rossi, N.; Stoilov, M.; Stoychev, L.; Tortora, L.; Vallazza, E.; Zampa, G.; Vacchi, A.
Source
Phys. Lett. A, 384/26 (2020) 126667
Subject
Language
Abstract
We report the first measurement of the temperature dependence of muon transfer rate from $\mu$p atoms to oxygen between 100 and 300 K. Data were obtained from the X-ray spectra of delayed events in gaseous target H$_2$/O$_2$ exposed to a muon beam. Based on the data, we determined the muon transfer energy dependence up to 0.1 eV, showing an 8-fold increase in contrast with the predictions of constant rate in the low energy limit. This work set constraints on theoretical models of muon transfer, and is of fundamental importance for the measurement of the hyperfine splitting of $\mu$p by the FAMU collaboration.
Comment: 11 pages, 4 figure
Comment: 11 pages, 4 figure