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Pyxel: the collaborative detection simulation framework
/ Prod'homme, Thibaut (ESTEC, Noordwijk) ; Lemmel, Frédéric (ESTEC, Noordwijk) ; Arko, Matej (ESTEC, Noordwijk) ; Serra, Benoît (ESOC, Darmstadt) ; George, Elizabeth M. (ESOC, Darmstadt) ; Biancalani, Enrico (Leiden Observ.) ; Smit, Hans (ESTEC, Noordwijk) ; Lucsanyi, David (CERN)
Pyxel is a novel python tool for end-to-end detection chain simulation i.e. [...]
arXiv:2012.05006.
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4.
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From Minkowski to de Sitter in Multifield No-Scale Models
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Nagaraj, Balakrishnan (Texas A-M) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Verner, Sarunas (Minnesota U., Theor. Phys. Inst.)
We show the uniqueness of superpotentials leading to Minkowski vacua of single-field no-scale supergravity models, and the construction of dS/AdS solutions using pairs of these single-field Minkowski superpotentials. We then extend the construction to two- and multifield no-scale supergravity models, providing also a geometrical interpretation. [...]
arXiv:1907.09123; KCL-PH-TH/2019-62; CERN-TH-2019-119; ACT-04-19; MI-TH-1928, UMN-TH-3829/19; MI-TH-1928,
UMN-TH-3829/19; FTPI-MINN-19/20.-
2019-10-14 - 31 p.
- Published in : JHEP 1910 (2019) 161
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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5.
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Constraining D-foam via the 21-cm Line
/ Ellis, John (King's Coll. London ; NICPB, Tallinn ; CERN) ; Mavromatos, Nick E. (King's Coll. London) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy)
We have suggested earlier that D-particles, which are stringy space-time defects predicted in brane-inspired models of the Universe, might constitute a component of dark matter, and that they might contribute to the masses of singlet fermions that could provide another component. Interactions of the quantum-fluctuating D-particles with matter induce vector forces that are mediated by a massless effective U(1) gauge field, the "D-photon", which is distinct from the ordinary photon and has different properties from dark photons. [...]
arXiv:1810.05393; CERN-TH-2018-217; KCL-PH-TH-2018-45; ACT-03-18; CERN-TH-2018-217,KCL-PH-TH/2018-45,ACT-03-18; MI-TH-18-183.-
2019-01-23 - 13 p.
- Published in : Phys. Rev. D 99 (2019) 015031
Fulltext: PDF; Fulltext from Publisher: PDF;
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Production and Integration of the ATLAS Insertable B-Layer
/ ATLAS IBL Collaboration
During the shutdown of the CERN Large Hadron Collider in 2013-2014, an additional pixel layer was installed between the existing Pixel detector of the ATLAS experiment and a new, smaller radius beam pipe. The motivation for this new pixel layer, the Insertable B-Layer (IBL), was to maintain or improve the robustness and performance of the ATLAS tracking system, given the higher instantaneous and integrated luminosities realised following the shutdown. [...]
arXiv:1803.00844; FERMILAB-PUB-18-826-V.-
2018-05-16 - 90 p.
- Published in : JINST 13 (2018) T05008
Fulltext: 1803.00844 - PDF; pdf - PDF; 915f919fb4ff01d19bc67dd5a6b9cd70 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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7.
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A Novel Foamy Origin for Singlet Fermion Masses
/ Ellis, John (King's Coll. London ; CERN) ; Mavromatos, Nick E. (King's Coll. London) ; Nanopoulos, Dimitri V. (Athens Academy ; HARC, Woodlands ; Texas A-M)
We show how masses for singlet fermions can be generated by interactions with a D-particle model of space-time foam inspired by brane theory. It has been shown previously by one of the authors (N.E.M.) such interactions may generate generate dynamically small masses for charged fermions via the recoils of D-particle defects interacting with photons. [...]
arXiv:1706.04080; CERN-TH-2017-123; KCL-PH-TH-2017-29; ACT-05-17; MI-TH-1757.-
2017-10-17 - 16 p.
- Published in : Phys. Rev. D 96 (2017) 086012
Fulltext: 10.1103_PhysRevD.96.086012 - PDF; arXiv:1706.04080 - PDF;
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Large numbers of cold positronium atoms created in laser-selected Rydberg states using resonant charge exchange
/ McConnell, R ; Gabrielse, G ; Kolthammer, WS ; Richerme, P ; Müllers, A ; Walz, J ; Grzonka, D ; Zielinski, M ; Fitzakerley, D ; George, MC et al.
/ATRAP
Lasers are used to control the production of highly excited positronium atoms (Ps*). The laser light excites Cs atoms to Rydberg states that have a large cross section for resonant charge-exchange collisions with cold trapped positrons. [...]
2016
- Published in : J. Phys. B 49 (2016) 064002
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Electron-cooled accumulation of 4×109 positrons for production and storage of antihydrogen atoms
/ Fitzakerley, DW (York U., Canada) ; George, M C (York U., Canada) ; Hessels, E A (York U., Canada) ; Skinner, T D G (York U., Canada) ; Storry, C H (York U., Canada) ; Weel, M (York U., Canada) ; Gabrielse, G (Harvard U., Phys. Dept.) ; Hamley, C D (Harvard U., Phys. Dept.) ; Jones, N (Harvard U., Phys. Dept.) ; Marable, K (Harvard U., Phys. Dept.) et al.
/ATRAP
Four billion positrons (e+) are accumulated in a Penning–Ioffe trap apparatus at 1.2 K and <6 × 10−17 Torr. This is the largest number of positrons ever held in a Penning trap. [...]
2016 - 6 p.
- Published in : J. Phys. B 49 (2016) 064001
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10.
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HV/HR-CMOS sensors for the ATLAS upgrade—concepts and test chip results
/ Liu, J (Marseille, CPPM ; Shandong U.) ; Backhaus, M (CERN ; Bonn U.) ; Barbero, M (Marseille, CPPM) ; Bates, R (Glasgow U.) ; Blue, A (Glasgow U.) ; Bompard, F (Marseille, CPPM) ; Breugnon, P (Marseille, CPPM) ; Buttar, C (Glasgow U.) ; Capeans, M (CERN) ; Clemens, J C (Marseille, CPPM) et al.
/HV CMOS
In order to extend its discovery potential, the Large Hadron Collider (LHC) will have a major upgrade (Phase II Upgrade) scheduled for 2022. The LHC after the upgrade, called High-Luminosity LHC (HL-LHC), will operate at a nominal leveled instantaneous luminosity of 5× 10(34) cm(−)(2) s(−)(1), more than twice the expected Phase I . [...]
2015
- Published in : JINST 10 (2015) C03033
Fulltext: PDF; IOP Open Access article: PDF;
In : 16th International Workshop on Radiation Imaging Detectors, Trieste, Italy, 22 - 26 Jun 2014, pp.C03033
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