CERN Accelerating science

CERN Document Server 172 records found  1 - 10próximoend  jump to record: Search took 0.58 seconds. 
1.
The long-distance window of the hadronic vacuum polarization for the muon g-2 / RBC Collaboration
We provide the first ab-initio calculation of the Euclidean long-distance window of the isospin symmetric light-quark connected contribution to the hadronic vacuum polarization for the muon $g-2$ and find $a_\mu^{\rm LD,iso,conn,ud} = 411.4(4.3)(2.4) \times 10^{-10}$. [...]
arXiv:2410.20590 ; CERN-TH-2024-182.
- 12.
Fulltext
2.
Testing CPT symmetry via precise mass measurements of multi-strange baryons in ALICE / Schotter, Romain (Stefan Meyer Inst. Subatomare Phys. ; Valencia U., IFIC)
These proceedings present measurements of the $\Xi^{-}$, $\overline{\Xi}^{+}$, $\Omega^{-}$, $\overline{\Omega}^{+}$ masses and mass differences between particle and anti-particle, in pp collisions at $\sqrt{s} = 13$ TeV collected by the ALICE Collaboration during the LHC Run 2. [...]
arXiv:2409.20176.
- 6.
Fulltext
3.
Testing CPT symmetry via precision mass measurements of multi-strange baryons in ALICE / Schotter, Romain (Stefan Meyer Inst. Subatomare Phys.)
In these proceedings, the measurements of the $\Xi^-$, $\overline{\Xi}^+$, $\Omega^-$, $\overline{\Omega}^+$ masses and the mass differences between particle and anti-particle have been measured in pp collisions collected by the ALICE Collaboration during LHC Run 2. [...]
arXiv:2409.13593.
- 4.
Fulltext
4.
Injection and capture of antiprotons in a Penning–Malmberg trap using a drift tube accelerator and degrader foil / Amsler, C. (Stefan Meyer Inst. Subatomare Phys.) ; Breuker, H. (Wako, RIKEN) ; Bumbar, M. (CERN) ; Chesnevskaya, S. (Stefan Meyer Inst. Subatomare Phys.) ; Costantini, G. (Brescia U. ; INFN, Pavia) ; Ferragut, R. (INFN, Milan ; Padua U. ; INFN, Padua) ; Giammarchi, M. (Padua U. ; INFN, Padua) ; Gligorova, A. (Stefan Meyer Inst. Subatomare Phys.) ; Gosta, G. (Brescia U. ; INFN, Pavia) ; Higaki, H. (Hiroshima U.) et al.
The Antiproton Decelerator (AD) at CERN provides antiproton bunches with a kinetic energy of 5.3 MeV. The Extra-Low ENergy Antiproton ring at CERN, commissioned at the AD in 2018, now supplies a bunch of electron-cooled antiprotons at a fixed energy of 100 keV. [...]
arXiv:2403.09268.- 2024-06-12 - 22 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1065 (2024) 169529 Fulltext: PDF;
5.
Antiproton annihilation at rest in thin solid targets and comparison with Monte Carlo simulations / Amsler, Claude (Stefan Meyer Inst. Subatomare Phys.) ; Breuker, Horst (Wako, RIKEN) ; Bumbar, Marcus (CERN ; Vienna U.) ; Cerwenka, Matti (Stefan Meyer Inst. Subatomare Phys. ; Vienna U.) ; Costantini, Giovanni (Brescia U. ; INFN, Brescia ; INFN, Pavia) ; Ferragut, Rafael (Milan Polytechnic ; INFN, Milan ; Milan U.) ; Fleck, Markus (Stefan Meyer Inst. Subatomare Phys.) ; Giammarchi, Marco (INFN, Milan ; Milan U.) ; Gligorova, Angela (Stefan Meyer Inst. Subatomare Phys.) ; Gosta, Giulia (Brescia U. ; INFN, Brescia ; INFN, Pavia) et al. /Asacusa AD-3
The mechanism of antiproton-nucleus annihilation at rest is not fully understood, despite substantial previous experimental and theoretical work. In this study we used slow extracted, sub-keV antiprotons from the ASACUSA apparatus at CERN to measure the charged particle multiplicities and their energy deposits from antiproton annihilations at rest on three different nuclei: carbon, molybdenum and gold. [...]
arXiv:2407.06721.- Geneva : CERN, 2024-11-17 - 18 p. - Published in : Eur. Phys. J. A 60 (2024) 225 Draft (restricted): PDF; Fulltext: CERN-EP-2024-182 - PDF; document - PDF; 2407.06721 - PDF;
6.
Herwig 7.3 Release Note / Bewick, Gavin (Durham U., IPPP) ; Ferrario Ravasio, Silvia (CERN) ; Gieseke, Stefan (KIT, Karlsruhe, TP) ; Kiebacher, Stefan (KIT, Karlsruhe, TP) ; Masouminia, Mohammad R. (Durham U., IPPP) ; Papaefstathiou, Andreas (Kennesaw State U.) ; Plätzer, Simon (Graz U.) ; Richardson, Peter (Durham U., IPPP) ; Samitz, Daniel (Stefan Meyer Inst. Subatomare Phys.) ; Seymour, Michael H. (Manchester U.) et al.
A new release of the Monte Carlo event generator Herwig (version 7.3) has been launched. This iteration encompasses several enhancements over its predecessor, version 7.2. [...]
arXiv:2312.05175; CERN-TH-2023-223; HERWIG-2023-01; KA-TP-28-2023; MCnet-23-19; IPPP/23/66.- 2024-10-14 - 10 p. - Published in : Eur. Phys. J. C 84 (2024) 1053 Fulltext: 2312.05175 - PDF; document - PDF;
7.
SDR, EVC, and SDREVC: Limitations and Extensions / ASACUSA-Cusp Collaboration
Methods for reducing the radius, temperature, and space charge of nonneutral plasma are usually reported for conditions which approximate an ideal Penning Malmberg trap. Here we show that (1) similar methods are still effective under surprisingly adverse circumstances: we perform SDR and SDREVC in a strong magnetic mirror field using only 3 out of 4 rotating wall petals. [...]
arXiv:2306.00862; CERN-EP-2023-102.- Geneva : CERN, 2023-10-31 - 8. - Published in : : 89 (2023) Draft (restricted): PDF; Fulltext: 2306.00862 - PDF; CERN-EP-2023-102 - PDF;
8.
Application of Copper Thermal Spraying for Electrical Joints between Superconducting Nb$_3$Sn Cables / D'Auria, Vincenzo (PSI, Villigen) ; Bruzzone, Pierluigi (PSI, Villigen) ; Meyer, Mickael Sebastian (CERN) ; Castro, Enrique Rodriguez (CERN ; Carlos III U., Madrid) ; Sgobba, Stefano (CERN)
This manuscript reports on the application of copper thermal spraying in the manufacturing process of an electrical connection between Nb3Sn cables for superconducting magnets of fusion reactors. The joint is realized through diffusion bonding of the sprayed coating of the two cables. [...]
2021 - 10 p. - Published in : Materials 15 (2021) 125 Fulltext: PDF;
9.
Update of Euclidean windows of the hadronic vacuum polarization / RBC Collaboration
We compute the standard Euclidean window of the hadronic vacuum polarization using multiple independent blinded analyses. We improve the continuum and infinite-volume extrapolations of the dominant quark-connected light-quark isospin-symmetric contribution and address additional sub-leading systematic effects from sea-charm quarks and residual chiral-symmetry breaking from first principles. [...]
arXiv:2301.08696.- 2023-09-01 - 24 p. - Published in : Phys. Rev. D 108 (2023) 054507 Fulltext: Publication - PDF; 2301.08696 - PDF;
10.
In-Beam Hyperfine Spectroscopy of Antihydrogen, Hydrogen, and Deuterium / Widmann, E. (Stefan Meyer Inst. Subatomare Phys.) /ASACUSA Collaboration
The ASACUSA collaboration is developing a polarized beam of antihydrogen atoms to precisely determine the ground-state hyperfine structure for studies of CPT and Lorentz invariance. Using a beam of ordinary hydrogen, measurements of both the $\sigma$ and $\pi$-transition have been performed, investigating orientation-dependent SME coefficients. [...]
arXiv:2212.13083.- 2023 - 5 p. - Published in : 10.1142/9789811275388_0008 Fulltext: PDF; External link: Preprint
In : 9th Meeting on CPT and Lorentz Symmetry, Bloomington, IN, United States, 17 - 26 May 2022, pp.34-38

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