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Improved limit on the directly measured antiproton lifetime

Sellner, S ; Besirli, M ; Bohman, M ; Borchert, M J ; Harrington, J ; Higuchi, T ; Mooser, A ; Nagahama, H ; Schneider, G ; Smorra, C ; Tanaka, T ; Blaum, K ; Matsuda, Y ; Ospelkaus, C ; Quint, W ; Walz, J ; Yamazaki, Y ; Ulmer, S

New journal of physics, 2017-08, Vol.19 (8), p.83023 [Periódico revisado por pares]

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Título:
Improved limit on the directly measured antiproton lifetime
Autor: Sellner, S ; Besirli, M ; Bohman, M ; Borchert, M J ; Harrington, J ; Higuchi, T ; Mooser, A ; Nagahama, H ; Schneider, G ; Smorra, C ; Tanaka, T ; Blaum, K ; Matsuda, Y ; Ospelkaus, C ; Quint, W ; Walz, J ; Yamazaki, Y ; Ulmer, S
Assuntos: 14.20.-c ; 21.10.Tg ; Antiparticles ; Antiprotons ; Confidence intervals ; CPT invariance ; lifetimes ; penning traps ; Physics
É parte de: New journal of physics, 2017-08, Vol.19 (8), p.83023
Notas: NJP-106926.R1
Descrição: Continuous monitoring of a cloud of antiprotons stored in a Penning trap for 405 days enables us to set an improved limit on the directly measured antiproton lifetime. From our measurements we extract a storage time of 3.15 × 10 8 equivalent antiproton-seconds, resulting in a lower lifetime limit of τ p ¯ > 10.2 a with a confidence level of 68 % . This result improves the limit on charge-parity-time violation in antiproton decays based on direct observation by a factor of 7.
Editor: Bristol: IOP Publishing
Idioma: Inglês

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