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State-of-the-art electroweak Higgs-pair production in association with two jets at the LHC in the Standard Model and beyond
/ Braun, Jens (Institute for Theoretical Physics, Karlsruhe Institute of Technology (KIT),) ; Heinrich, Gudrun Marlen (KIT - Karlsruhe Institute of Technology (DE)) ; Höfer, Marius (Institute for Theoretical Physics, Karlsruhe Institute of Technology (KIT),) ; Jäger, Barbara (Institute for Theoretical Physics, University of Tübingen) ; Karlberg, Alexander (CERN) ; Reinhardt, Simon (Institute for Theoretical Physics, University of Tübingen)
We present a systematic comparison of two state-of-the-art tools for the simulation of Higgs-pair production via vector boson fusion (VBF) as implemented in GoSam+Whizard and the POWHEG-BOX. Cross sections and distributions are provided within the Standard Model and beyond within scenarios typical for experimental analyses and for a range of energies of relevance to the LHC and its upcoming high luminosity phase. [...]
LHCHWG-2025-012.-
Geneva : CERN, 2025 - 20.
Fulltext: PDF;
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$g g \to Z H$ : updated predictions at NLO QCD
/ Vitti, Marco (Institute for Theoretical Particle Physics, KIT, 76131 Karlsruhe, Germany) ; Campillo Aveleira, Benjamin (Institute for Theoretical Physics, KIT, 76131 Karlsruhe, Germany) ; Chen, Long (School of Physics, Shandong University, Jinan, 250100 Shandong, China) ; Davies, Joshua (Department of Mathematical Sciences, University of Liverpool, Liverpool, UK) ; Degrassi, Giuseppe (Dipartimento di Matematica e Fisica, Università di Roma Tre, and INFN, Sezione di Roma Tre, Rome, Italy) ; Giardino, Pier Paolo (Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain) ; Groeber, Ramona (Universita e INFN, Padova (IT)) ; Heinrich, Gudrun Marlen (KIT - Karlsruhe Institute of Technology (DE)) ; Jones, Stephen Philip (University of Durham (GB)) ; Kerner, Matthias (Institute for Theoretical Physics, KIT, 76131 Karlsruhe, Germany) et al.
We present state-of-the-art predictions for the inclusive cross section of gluon-initiated $ZH$ production, following the recommendations of the LHC Higgs Working Group. In particular, we include NLO QCD corrections, where the virtual corrections are obtained from the combination of a forward expansion and a high-energy expansion, and the real corrections are exact. [...]
LHCHWG-2025-007.-
Geneva : CERN, 2025 - 14.
Fulltext: PDF; Updated version after addressing CDS comments: PDF;
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Effective Field Theory descriptions of Higgs boson pair production
/ Gröber, Ramona (Dipartimento di Fisica e Astronomia "G.Galilei", Università di Padova and INFN, Sezione di Padova, 35131 Padova, Italy) ; Alasfar, Lina (Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany) ; Cadamuro, Luca (Université Paris-Saclay (FR)) ; Dimitriadi, Christina (University of Bonn (DE)) ; Ferrari, Arnaud (Uppsala University (SE)) ; Heinrich, Gudrun Marlen (KIT - Karlsruhe Institute of Technology (DE)) ; Ingebretsen Carlson, Tom (Stockholm University (SE)) ; Lang, Jannis (Institute for Theoretical Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany) ; Ordek, Serhat (Uppsala University (SE)) ; Pereira Sanchez, Laura (Stockholm University (SE)) et al.
Higgs boson pair production is traditionally considered to be of particular interest for a measurement of the trilinear Higgs self-coupling. Yet it can offer insights into other couplings as well, since - in an effective field theory (EFT) parameterisation of potential new physics - both the production cross section and kinematical properties of the Higgs boson pair depend on various other Wilson coefficients of EFT operators. [...]
LHCHWG-2022-004.-
Geneva : CERN, 2022 - 38.
LHC Higgs WG note: PDF;
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Towards a test of the weak equivalence principle of gravity using anti-hydrogen at CERN
/ Banerjee, D (ETH, Zurich (main)) ; Biraben, F (Paris, Lab. Kastler Brossel) ; Charlton, M (Swansea U.) ; Cladé, P (Paris, Lab. Kastler Brossel) ; Comini, P (CSNSM, Orsay) ; Crivelli, P (ETH, Zurich (main)) ; Dalkarov, O (Lebedev Inst.) ; Debu, P (IRFU, SPP, Saclay) ; Dodd, L (Swansea U.) ; Douillet, A (Paris, Lab. Kastler Brossel) et al.
The aim of the GBAR (Gravitational Behavior of Antimatter at Rest) experiment is to measure the free fall acceleration of an antihydrogen atom, in the terrestrial gravitational field at CERN and therefore test the Weak Equivalence Principle with antimatter. The aim is to measure the local gravity with a 1% uncertainty which can be reduced to few parts of 10-3..
2016 - 2 p.
- Published in : 10.1109/CPEM.2016.7540781
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Optmized stability of a modulated driver in a plasma wakefield
/ Martorelli, Roberto (Heinrich-Heine U., Inst. Math.) ; Pukhov, Alexander (Heinrich-Heine U., Inst. Math.)
We analyze the transverse stability for a configuration of multiple gaussian bunches subject to the self-generated plasma wakefield. Through a semi-analytical approach we first study the equilibrium configuration for the modulated beam and then we investigate the evolution of the equilibrium configuration due to the emittance-driven expansion of the beam front that results in a rigid backward shift. [...]
CERN-ACC-2016-0047; arXiv:1603.04326.-
Geneva : CERN, 2016
- Published in : Laser Part. Beams 34 (2016) 519
Fulltext: PDF; External link: Preprint
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AWAKE, The Advanced Proton Driven Plasma Wakefield Acceleration Experiment at CERN
/ Gschwendtner, E. (CERN) ; Adli, E. (Oslo U.) ; Amorim, L. (Lisbon, IST) ; Apsimon, R. (Cockcroft Inst. Accel. Sci. Tech. ; Lancaster U.) ; Assmann, R. (DESY) ; Bachmann, A.M. (Munich, Max Planck Inst.) ; Batsch, F. (Munich, Max Planck Inst.) ; Bauche, J. (CERN) ; Berglyd Olsen, V.K. (Oslo U.) ; Bernardini, M. (CERN) et al.
The Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) aims at studying plasma wakefield generation and electron acceleration driven by proton bunches. It is a proof-of-principle R&D; experiment at CERN and the world's first proton driven plasma wakefield acceleration experiment. [...]
arXiv:1512.05498; CERN-ACC-2015-368.-
2016-09-01 - 7 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 829 (2016) 76-82
Elsevier Open Access article: PDF; Fulltext: arXiv:1512.05498 - PDF; 10.1016_j.nima.2016.02.026 - PDF; External link: Preprint
In : 2nd European Advanced Accelerator Concepts Workshop, La Biodola, Isola d'Elba, Italy, 12 - 19 Sep 2015, pp.76-82
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Path to AWAKE: Evolution of the concept
/ Caldwell, A. (Munich, Max Planck Inst.) ; Adli, E. (Oslo U.) ; Amorim, L. (Lisbon, CFTP) ; Apsimon, R. (Cockcroft Inst. Accel. Sci. Tech. ; Lancaster U.) ; Argyropoulos, T. (CERN) ; Assmann, R. (DESY) ; Bachmann, A.-M. (Munich, Max Planck Inst.) ; Batsch, F. (Munich, Max Planck Inst.) ; Bauche, J. (CERN) ; Berglyd Olsen, V.K. (Oslo U.) et al.
This report describes the conceptual steps in reaching the design of the AWAKE experiment currently under construction at CERN. We start with an introduction to plasma wakefield acceleration and the motivation for using proton drivers. [...]
arXiv:1511.09032; FERMILAB-CONF-15-650.-
2016-09-01 - 14 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 829 (2016) 3-16
Fulltext: CERN-ACC-2016-0348 - PDF; arXiv:1511.09032 - PDF; fermilab-conf-15-650 - PDF; External link: Fermilab Accepted Manuscript
In : 2nd European Advanced Accelerator Concepts Workshop, La Biodola, Isola d'Elba, Italy, 12 - 19 Sep 2015, pp.3-16
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The GBAR antimatter gravity experiment
/ Pérez, P (IRFU, SPhN, Saclay) ; Banerjee, D (Zurich, ETH) ; Biraben, F (Paris, Lab. Kastler Brossel) ; Brook-Roberge, D (IRFU, SPhN, Saclay) ; Charlton, M (Swansea U.) ; Cladé, P (Paris, Lab. Kastler Brossel) ; Comini, P (IRFU, SPhN, Saclay) ; Crivelli, P (Zurich, ETH) ; Dalkarov, O (Lebedev Inst.) ; Debu, P (IRFU, SPhN, Saclay) et al.
The GBAR project (Gravitational Behaviour of Anti hydrogen at Rest) at CERN, aims to measure the free fall acceleration of ultracold neutral anti hydrogen atoms in the terrestrial gravitational field. The experiment consists preparing anti hydrogen ions (one antiproton and two positrons) and sympathetically cooling them with Be$^{+}$ ions to less than 10 μK. [...]
2015 - 7 p.
- Published in : Hyperfine Interact. 233 (2015) 21-27
In : 5th International Conference on Exotic Atoms and Related Topics, Vienna, Austria, 15 - 19 Sep 2014, pp.21-27
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AD-7/GBAR status report for the 2015 CERN SPSC
/ GBAR Collaboration
The GBAR experiment will use one of the low energy antiproton beam lines from the ELENA ring that is being prepared and scheduled to start operating in 2017 [...]
CERN-SPSC-2015-001 ; SPSC-SR-151.
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2015.
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