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Published Articles

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2021-07-22
17:45
Description of beam instabilities in synchrotrons with wakefields and space charge forces using the circulant matrix model / Buffat, X (CERN) ; Métral, E (CERN) ; Gottlob, E (Ecole Polytechnique, Lausanne ; U. Brussels (main)) ; Høgh, C (Ecole Polytechnique, Lausanne ; Imperial Coll., London) ; Oeftiger, A (Darmstadt, GSI ; CERN) ; Pieloni, T (Ecole Polytechnique, Lausanne)
A new model for the description of beam instabilities in synchrotrons featuring wakefields and space charge forces is proposed, using the circulant matrix approach. The predictions of this model are discussed in light of past ones, with a particular emphasis on the possible mitigation of the transverse mode coupling instability by space charge forces. [...]
2021 - 12 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 060101

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2021-07-22
17:45
First Results of the $^{140}$Ce(n,$\gamma$)$^{141}$Ce Cross-Section Measurement at n_TOF / n_TOF Collaboration
An accurate measurement of the $^{140}$Ce(n,$\gamma$) energy-dependent cross-section was performed at the n_TOF facility at CERN. This cross-section is of great importance because it represents a bottleneck for the s-process nucleosynthesis and determines to a large extent the cerium abundance in stars. [...]
2021 - 11 p. - Published in : Universe 7 (2021) 200 Fulltext: PDF;

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2021-07-22
17:45
Isotope Shifts of Radium Monofluoride Molecules / Udrescu, S M (MIT) ; Brinson, A J (MIT) ; Ruiz, R F Garcia (MIT ; CERN) ; Gaul, K (Philipps U. Marburg) ; Berger, R (Philipps U. Marburg) ; Billowes, J (Manchester U.) ; Binnersley, C L (Manchester U.) ; Bissell, M L (Manchester U.) ; Breier, A A (Kassel U.) ; Chrysalidis, K (CERN) et al.
Isotope shifts of $^{223-226,228}$ Ra$^{19}$F were measured for different vibrational levels in the electronic transition $A^2 \Pi_{1/2} \leftarrow X^2 \Sigma^+$. The observed isotope shifts demonstrate the particularly high sensitivity of radium monofluoride to nuclear size effects, offering a stringent test of models describing the electronic density within the radium nucleus [...]
2021 - 7 p. - Published in : Phys. Rev. Lett. 127 (2021) 033001

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2021-07-22
17:45
The Strip SiPM: a study of single photon time resolution / Doroud, K (CERN ; World Lab., Geneva ; Gangneung-Wonju Natl. U.) ; Kim, D W (Gangneung-Wonju Natl. U.) ; Kwon, K H (Gangneung-Wonju Natl. U.) ; Liu, Z (CAS, SIAT, Shenzhen) ; Min, B G (Gangneung-Wonju Natl. U.) ; Williams, M C S (CERN ; World Lab., Geneva ; INFN, Bologna ; U. Bologna, DIFA) ; Zichichi, A (CERN ; INFN, Bologna ; U. Bologna, DIFA ; Enrico Fermi Ctr., Rome)
The Strip Silicon PhotoMultiplier (SiPM) allows a photosensitive area to be created that has excellent time resolution coupled to good position resolution. However, as the SiPM is made larger it becomes more difficult to extract the signal produced by a single photon; we thus are using the NINO ASIC as the front-end amplifier. [...]
2021 - 11 p. - Published in : JINST 16 (2021) P06017 Fulltext: document - HTM; Doroud_2021_J._Inst._16_P06017 - PDF;

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2021-07-22
17:45
A neural network approach for efficient calculation of the current correction value in femtoampere range for a new generation of ionizing radiation monitors at CERN / Szumega, Jarosław M (CERN) ; Boukabache, Hamza (CERN) ; Perrin, Daniel (CERN)
The European Organization for Nuclear Research (CERN) conducts experiments that involve colliding beams of particles either together or into stationary targets. During these interactions, stray radiation may be generated [...]
2021 - 8 p. - Published in : 10.1016/j.radphyschem.2021.109539 Fulltext: PDF;

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2021-07-22
17:45
Properties of a New Group of Cosmic Nuclei: Results from the Alpha Magnetic Spectrometer on Sodium, Aluminum, and Nitrogen / AMS Collaboration
We report the properties of sodium (Na) and aluminum (Al) cosmic rays in the rigidity range 2.15 GV to 3.0 TV based on 0.46 million sodium and 0.51 million aluminum nuclei collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. We found that Na and Al, together with nitrogen (N), belong to a distinct cosmic ray group. [...]
2021 - 9 p. - Published in : Phys. Rev. Lett. 127 (2021) 021101 Fulltext: PDF;

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2021-07-22
17:45
Increasing the Execution Speed of Containerized Analysis Workflows Using an Image Snapshotter in Combination With CVMFS / Mosciatti, Simone (CERN) ; Lange, Clemens (CERN) ; Blomer, Jakob (CERN)
The past years have shown a revolution in the way scientific workloads are being executed thanks to the wide adoption of software containers. These containers run largely isolated from the host system, ensuring that the development and execution environments are the same everywhere. [...]
2021 - 7 p. - Published in : Frontiers in Big Data 4 (2021) 673163 Fulltext: PDF;

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2021-07-22
17:44
Test of the universality of $\tau$ and $\mu$ lepton couplings in $W$-boson decays with the ATLAS detector / ATLAS Collaboration
The standard model of particle physics encapsulates our best current understanding of physics at the smallest scales. A fundamental axiom of this theory is the universality of the couplings of the different generations of leptons to the electroweak gauge bosons. [...]
2021 - 21 p. - Published in : Nature Phys. 17 (2021) 813-818 Fulltext: PDF;

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2021-07-22
17:44
Search for single production of vector-like $B$ quark decaying to a Higgs boson and bottom quark at the CLIC / Qin, Xin (Xinxiang Medical U.) ; Shen, Jie-Fen (Xinxiang Medical U.)
We investigate the prospect of discovering the SU(2) singlet vector-like bottom quark (VLQ- B ) in $e^+e^-$ collisions at future Compact Linear Collider (CLIC) at the 3 TeV stage. As signal process, we focus on single production of the VLQ- $B$ with $4b$ final state, namely, $e+^e^- \rightarrow B \overline{b} \rightarrow hb \overline{b}$ followed by $h \rightarrow b\overline{b}$ . [...]
2021 - 10 p. - Published in : Nucl. Phys. B 966 (2021) 115388 Article from SCOAP3: PDF;

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2021-07-22
17:44
CMS phase-II upgrade of the RPC Link System / CMS Collaboration
The present RPC Link System has been servicing as one of the CMS subsystems since installation in 2008. Although the current Link System has been functioning well for the past 13 years, the aging of its electronic components and lack of radiation hard ASICs could present problems for future operations. [...]
2021 - 10 p. - Published in : JINST 16 (2021) C05003

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