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High-resolution and low-background $^{163}$Ho spectrum: interpretation of the resonance tails
/ Velte, C (Kirchhoff Inst. Phys.) ; Ahrens, F (Kirchhoff Inst. Phys.) ; Barth, A (Kirchhoff Inst. Phys.) ; Blaum, K (Heidelberg, Max Planck Inst.) ; Braß, M (U. Heidelberg, ITP) ; Door, M (Heidelberg, Max Planck Inst.) ; Dorrer, H (Mainz U., Inst. Kernphys.) ; Düllmann, Ch E (Mainz U., Inst. Kernphys. ; Darmstadt, GSI ; Helmholtz Inst., Mainz) ; Eliseev, S (Heidelberg, Max Planck Inst.) ; Enss, C (Kirchhoff Inst. Phys.) et al.
The determination of the effective electron neutrino mass via kinematic analysis of beta and electron capture spectra is considered to be model-independent since it relies on energy and momentum conservation. At the same time the precise description of the expected spectrum goes beyond the simple phase space term. [...]
2019 - 8 p.
- Published in : Eur. Phys. J. C 79 (2019) 1026
External link: Fulltext
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BASE—high-precision comparisons of the fundamental properties of protons and antiprotons
/ Latacz, B M (RIKEN (main) ; CERN) ; Arndt, B P (RIKEN (main) ; Heidelberg, Max Planck Inst. ; Darmstadt, GSI) ; Bauer, B B (RIKEN (main) ; Mainz U., Inst. Phys.) ; Devlin, J A (RIKEN (main) ; CERN) ; Erlewein, S R (RIKEN (main) ; Heidelberg, Max Planck Inst.) ; Fleck, M (RIKEN (main) ; Tokyo U., Math. Sci.) ; Jäger, J I (RIKEN (main) ; CERN ; Heidelberg, Max Planck Inst.) ; Schiffelholz, M (RIKEN (main) ; Leibniz U., Hannover) ; Umbrazunas, G (RIKEN (main) ; ETH, Zurich (main)) ; Wursten, E J (RIKEN (main)) et al.
The BASE collaboration at the antiproton decelerator/ELENA facility of CERN compares the fundamental properties of protons and antiprotons with ultra-high precision. Using advanced Penning trap systems, we have measured the proton and antiproton magnetic moments with fractional uncertainties of 300 parts in a trillion (p.p.t.) and 1.5 parts in a billion (p.p.b.), respectively [...]
2023 - 8 p.
- Published in : Eur. Phys. J. D 77 (2023) 94
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Sympathetic cooling of a trapped proton mediated by an LC circuit
/ BASE Collaboration
Efficient cooling of trapped charged particles is essential to many fundamental physics experiments, to high-precision metrology and to quantum technology. Until now, sympathetic cooling has required close-range Coulomb interactions, but there has been a sustained desire to bring laser-cooling techniques to particles in macroscopically separated traps, extending quantum control techniques to previously inaccessible particles such as highly charged ions, molecular ions and antimatter. [...]
2021 - 11 p.
- Published in : Nature 596 (2021) 514-518
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Compression of a mixed antiproton and electron non-neutral plasma to high densities
/ Aghion, Stefano (Milan Polytechnic ; INFN, Milan) ; Amsler, Claude (Stefan Meyer Inst. Subatomare Phys.) ; Bonomi, Germano (Brescia U. ; INFN, Pavia) ; Brusa, Roberto S (Trento U. ; INFN, Trento) ; Caccia, Massimo (INFN, Milan ; Insubria U., Como) ; Caravita, Ruggero (Genoa U. ; INFN, Genoa) ; Castelli, Fabrizio (INFN, Milan ; Milan U.) ; Cerchiari, Giovanni (Heidelberg, Max Planck Inst.) ; Comparat, Daniel (LAC, Orsay) ; Consolati, Giovanni (Milan Polytechnic ; INFN, Milan) et al.
We describe a multi-step “rotating wall” compression of a mixed cold antiproton–electron non-neutral plasma in a 4.46 T Penning–Malmberg trap developed in the context of the AEḡIS experiment at CERN. Such traps are routinely used for the preparation of cold antiprotons suitable for antihydrogen production. [...]
2018 - 11 p.
- Published in : Eur. Phys. J. D 72 (2018) 76
- Published in : Eur. Phys. J. D 73 (2019) 73
Erratum: PDF; Fulltext: PDF;
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Direct limits on the interaction of antiprotons with axion-like dark matter
/ Smorra, C. (Wako, RIKEN) ; Stadnik, Y.V. (Helmholtz Inst., Mainz ; Tokyo U., IPMU) ; Blessing, P.E. (Wako, RIKEN ; Darmstadt, GSI) ; Bohman, M. (Wako, RIKEN ; Heidelberg, Max Planck Inst.) ; Borchert, M.J. (Wako, RIKEN ; Leibniz U., Hannover) ; Devlin, J.A. (Wako, RIKEN ; CERN) ; Erlewein, S. (Wako, RIKEN ; Heidelberg, Max Planck Inst. ; CERN) ; Harrington, J.A. (Wako, RIKEN ; Heidelberg, Max Planck Inst.) ; Higuchi, T. (Wako, RIKEN ; Tokyo U. ; Osaka U., Res. Ctr. Nucl. Phys.) ; Mooser, A. (Wako, RIKEN ; Heidelberg, Max Planck Inst.) et al.
Astrophysical observations indicate that there is roughly five times more dark matter in the Universe than ordinary baryonic matter, with an even larger amount of the Universe's energy content due to dark energy. So far, the microscopic properties of these dark components have remained shrouded in mystery. [...]
arXiv:2006.00255.-
2019-11-13 - 5 p.
- Published in : Nature 575 (2019) 310-314
Fulltext: PDF; External link: Supplementary information
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Evaluation of high-precision atomic masses of A ∼ 50-80 and rare-earth nuclides measured with ISOLTRAP
/ Huang, W J (CSNSM, Orsay ; Heidelberg, Max Planck Inst.) ; Atanasov, D (CERN) ; Audi, G (CSNSM, Orsay) ; Blaum, K (Heidelberg, Max Planck Inst.) ; Cakirli, R B (Istanbul U.) ; Herlert, A (FAIR, Darmstadt) ; Kowalska, M (CERN) ; Kreim, S (Heidelberg, Max Planck Inst. ; CERN) ; Litvinov, Yu A (Darmstadt, GSI) ; Lunney, D (CSNSM, Orsay) et al.
High-precision mass measurements of stable and beta-decaying nuclides $^{52-57}$Cr, $^{55}$Mn, $^{56,59}$Fe, $^{59}$Co, $^{75, 77-79}$Ga, and the lanthanide nuclides $^{140}$Ce, $^{140}$Nd, $^{160}$Yb, $^{168}$Lu, $^{178}$Yb have been performed with the Penning-trap mass spectrometer ISOLTRAP at ISOLDE/CERN. The new data are entered into the Atomic Mass Evaluation and improve the accuracy of masses along the valley of stability, strengthening the so-called backbone. [...]
2019 - 9 p.
- Published in : Eur. Phys. J. A 55 (2019) 96
Fulltext (Open Access version from publisher): PDF;
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Characterization of the shape-staggering effect in mercury nuclei
/ Marsh, B A (CERN) ; Day Goodacre, T (CERN ; Manchester U.) ; Sels, S (Leuven U.) ; Tsunoda, Y (Tokyo U., CNS) ; Andel, B (Comenius U.) ; Andreyev, A N (York U., England ; JAEA, Ibaraki) ; Althubiti, N A (Manchester U.) ; Atanasov, D (Heidelberg, Max Planck Inst.) ; Barzakh, A E (St. Petersburg, INP) ; Billowes, J (Manchester U.) et al.
In rare cases, the removal of a single proton (Z) or neutron (N) from an atomic nucleus leads to a dramatic shape change. These instances are crucial for understanding the components of the nuclear interactions that drive deformation. [...]
2018 - 6 p.
- Published in : Nature Phys. 14 (2018) 1163-1167
Fulltext: PDF; External link: INTERACTIONS
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The electron capture in $^{163}$Ho experiment – ECHo
/ Gastaldo, L (Kirchhoff Inst. Phys.) ; Blaum, K (Heidelberg, Max Planck Inst.) ; Chrysalidis, K (Mainz U., Inst. Phys.) ; Day Goodacre, T (CERN) ; Domula, A (Dresden, Tech. U.) ; Door, M (Heidelberg, Max Planck Inst.) ; Dorrer, H (Mainz U., Inst. Kernphys. ; PSI, Villigen ; Bern U.) ; Düllmann, Ch E (Mainz U., Inst. Kernphys. ; Darmstadt, GSI ; Helmholtz Inst., Mainz) ; Eberhardt, K (Mainz U., Inst. Kernphys. ; Helmholtz Inst., Mainz) ; Eliseev, S (Heidelberg, Max Planck Inst.) et al.
Neutrinos, and in particular their tiny but non-vanishing masses, can be considered one of the doors towards physics beyond the Standard Model. Precision measurements of the kinematics of weak interactions, in particular of the$^{3}$H β-decay and the$^{163}$Ho electron capture (EC), represent the only model independent approach to determine the absolute scale of neutrino masses. [...]
2017 - 72 p.
- Published in : Eur. Phys. J. Spec. Top. 226 (2017) 1623-1694
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