CERN Accelerating science

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1.
Interactions resolve state-dependence in a toy-model of AdS black holes / Bzowski, Adam (Leuven U. ; IPhT, Saclay) ; Gnecchi, Alessandra (CERN) ; Hertog, Thomas (Leuven U.)
We show that the holographic description of a class of AdS black holes with scalar hair involves dual field theories with a double well effective potential. Black hole microstates have significant support around both vacua in the dual, which correspond to perturbative degrees of freedom on opposite sides of the horizon. [...]
arXiv:1802.02580; CERN-TH-2018-027.- 2018-06-29 - 43 p. - Published in : JHEP 06 (2018) 167 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: arXiv:1802.02580 - PDF; 1802.02580 - PDF;
2.
Quadrupole Moments of $^{29}$Mg and $^{33}$Mg / Yordanov, Deyan Todorov (Orsay, IPN ; Heidelberg, Max Planck Inst. ; CERN) ; Kowalska, Magdalena (CERN) ; Blaum, Klaus (Heidelberg, Max Planck Inst.) ; De Rydt, Marieke (Leuven U.) ; Flanagan, Kieran T. (Manchester U. ; Leuven U.) ; Himpe, Pieter (Leuven U.) ; Lievens, Peter (Leuven U.) ; Mallion, Stephen (Leuven U.) ; Neugart, Rainer (Heidelberg, Max Planck Inst. ; Mainz U., Inst. Kernchem.) ; Neyens, Gerda (Leuven U.) et al.
The quadrupole moments of 29Mg and 33Mg have been constrained by collinear laser spectroscopy at CERN-ISOLDE. The values are consistent with shell-model predictions, thus supporting the current understanding of light nuclei associated with the "island of inversion"..
arXiv:1905.05580.- 2019-06-12 - 4 p. - Published in : Hyperfine Interact. 240 (2019) 67 Fulltext: PDF;
3.
Observation of the radiative decay of the ${}^{229}\mathrm{Th}$ nuclear clock isomer / Kraemer, Sandro (Leuven U. ; LMU Munich (main)) ; Moens, Janni (Leuven U.) ; Athanasakis-Kaklamanakis, Michail (Leuven U. ; CERN) ; Bara, Silvia (Leuven U.) ; Beeks, Kjeld (Vienna, Tech. U., Atominst.) ; Chhetri, Premaditya (Leuven U.) ; Chrysalidis, Katerina (CERN) ; Claessens, Arno (Leuven U.) ; Cocolios, Thomas E. (Leuven U.) ; Correia, João G.M. (Lisbon U.) et al.
The nucleus of the radioisotope thorium-229 (${}^{229}$Th) features an isomer with an exceptionally low excitation energy that enables direct laser manipulation of nuclear states. For this reason, it is a leading candidate for use in next-generation optical clocks. [...]
arXiv:2209.10276.- 2023-05-24 - 15 p. - Published in : Nature 617 (2023) 706–710 Fulltext: PDF;
4.
Supercurrents in N=1 Minimal Supergravity in the Superconformal Formalism / Ferrara, Sergio (CERN ; Frascati) ; Samsonyan, Marine (Yerevan Phys. Inst.) ; Tournoy, Magnus (Leuven U.) ; Van Proeyen, Antoine (Leuven U.)
We discuss the Einstein tensor, the supercurrent and their conservation laws of old and new minimal formulations of supergravity in the superconformal approach. The variation of the action with respect to the gauge field of the $R$-symmetry in the conformal approach (the auxiliary field in the super-Poincar\'{e} action) allows to find the Einstein tensor and supercurrent in any curved background. [...]
CERN-TH-2019-225; arXiv:1912.10673.- 2020-10-07 - 5 p. - Published in : Phys. Part. Nucl. Lett. 17 (2020) 645-649 Fulltext: PDF;
In : 13th International Workshop on Supersymmetries and Quantum Symmetries (SQS'19), Yerevan, Armenia, 26 - 31 Aug 2019, pp.645-649
5.
The Supercurrent and Einstein equations in the Superconformal formulation / Ferrara, Sergio (CERN ; UCLA ; Frascati) ; Samsonyan, Marine (CERN) ; Tournoy, Magnus (Leuven U.) ; Van Proeyen, Antoine (Leuven U.)
We give a new expression for the supercurrent and its conservation in curved ${\cal N}=1$, $D=4$ superspace using the superconformal approach. The first component of the superfield, whose lowest component is the vector auxiliary field gives the (super)Einstein equations. [...]
arXiv:1705.02272; CERN-TH-2017-035.- 2017-08-28 - 42 p. - Published in : JHEP 08 (2017) 119 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
6.
Inflation from Supergravity with Gauged R-symmetry in de Sitter Vacuum / Antoniadis, I. (Paris, LPTHE ; Bern U.) ; Chatrabhuti, A. (Chulalongkorn U.) ; Isono, H. (Chulalongkorn U.) ; Knoops, R. (U. Geneva (main) ; KU Leuven, Dept. Phys. Astron.)
We study the cosmology of a recent model of supersymmetry breaking, in the presence of a tuneable positive cosmological constant, based on a gauged shift symmetry of a string modulus that can be identified with the string dilaton. The minimal spectrum of the `hidden' supersymmetry breaking sector consists then of a vector multiplet that gauges the shift symmetry of the dilaton multiplet and when coupled to the MSSM leads to a distinct low energy phenomenology depending on one parameter. [...]
arXiv:1608.02121; CERN-TH-2016-178; CERN-TH-2016-178.- 2016-12-09 - 19 p. - Published in : Eur. Phys. J. C 76 (2016) 680 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
7.
Electromagnetic properties of low-lying states in neutron-deficient Hg isotopes: Coulomb excitation of $^{182}$Hg, $^{184}$Hg, $^{186}$Hg and $^{188}$Hg / Wrzosek-Lipska, K (Warsaw U., Heavy Ion Lab ; Leuven U.) ; Rezynkina, K (Leuven U. ; U. Strasbourg) ; Bree, N (Leuven U.) ; Zielińska, M (Warsaw U., Heavy Ion Lab ; IRFU, Saclay) ; Gaffney, L P (Liverpool U. ; Leuven U. ; CERN ; West Scotland U.) ; Petts, A (Liverpool U.) ; Andreyev, A (Leuven U. ; York U., England) ; Bastin, B (Leuven U. ; GANIL) ; Bender, M (Lyon, IPN) ; Blazhev, A (Cologne U.) et al.
The neutron-deficient mercury isotopes serve as a classical example of shape coexistence, whereby at low energy near-degenerate nuclear states characterized by different shapes appear. The electromagnetic structure of even-mass $^{182-188}$ Hg isotopes was studied using safe-energy Coulomb excitation of neutron-deficient mercury beams delivered by the REX-ISOLDE facility at CERN. [...]
2019 - 23 p. - Published in : Eur. Phys. J. A 55 (2019) 130 Fulltext (Open Access version from publisher): PDF;
8.
Chemical Purification of Terbium-155 from Pseudo-Isobaric Impurities in a Mass Separated Source Produced at CERN / Webster, Ben (Teddington, Natl. Phys. Lab ; Surrey U.) ; Ivanov, Peter (Teddington, Natl. Phys. Lab) ; Russell, Ben (Teddington, Natl. Phys. Lab) ; Collins, Sean (Teddington, Natl. Phys. Lab) ; Stora, Thierry (CERN) ; Ramos, Joao Pedro (CERN ; Leuven U.) ; Köster, Ulli (Laue-Langevin Inst.) ; Robinson, Andrew Paul (Teddington, Natl. Phys. Lab ; Manchester U.) ; Read, David (Teddington, Natl. Phys. Lab ; Surrey U.)
Four terbium radioisotopes ($^{149, 152, 155, 161}$Tb) constitute a potential theranostic quartet for cancer treatment but require any derived radiopharmaceutical to be essentially free of impurities. Terbium-155 prepared by proton irradiation and on-line mass separation at the CERN-ISOLDE and CERN-MEDICIS facilities contains radioactive$^{139}$Ce$^{16}$O and also zinc or gold, depending on the catcher foil used. [...]
2019 - Published in : Sci. Rep. 9 (2019) 10884 fulltext from publisher: PDF;
9.
Aspects of Berry phase in QFT / Baggio, Marco (Leuven U.) ; Niarchos, Vasilis (Durham U., Dept. of Math. ; Durham U., CPT) ; Papadodimas, Kyriakos (CERN ; U. Groningen, VSI)
When continuous parameters in a QFT are varied adiabatically, quantum states typically undergo mixing---a phenomenon characterized by the Berry phase. We initiate a systematic analysis of the Berry phase in QFT using standard quantum mechanics methods. [...]
arXiv:1701.05587; CERN-TH-2016-241; DCPT-16-55.- 2017-04-11 - 50 p. - Published in : JHEP 04 (2017) 062 Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF;
10.
Measurement and microscopic description of odd-even staggering of charge radii of exotic copper isotopes / de Groote, R.P. (Leuven U. ; Jyvaskyla U.) ; Billowes, J. (Manchester U.) ; Binnersley, C.L. (Manchester U.) ; Bissell, M.L. (Manchester U.) ; Cocolios, T.E. (Leuven U.) ; Day Goodacre, T. (CERN ; TRIUMF) ; Farooq-Smith, G.J. ; Fedorov, D.V. (St. Petersburg, INP) ; Flanagan, K.T. (Manchester U.) ; Franchoo, S. (Orsay, IPN) et al.
The mesoscopic nature of the atomic nucleus gives rise to a wide array of macroscopic and microscopic phenomena. The size of the nucleus is a window into this duality: while the charge radii globally scale as $A^{1/3}$, their evolution across isotopic chains reveals unanticipated structural phenomena [1-3]. [...]
arXiv:1911.08765.- 2020-04-13 - 5 p. - Published in : Nature Phys. 16 (2020) 620-624 Fulltext: PDF; Fulltext from Publisher: PDF; Fulltext from publisher: PDF;

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