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CERN Accelerating science

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1.
CEPC Technical Design Report: Accelerator / CEPC Study Group Collaboration
The Circular Electron Positron Collider (CEPC) is a large scientific project initiated and hosted by China, fostered through extensive collaboration with international partners. The complex comprises four accelerators: a 30 GeV Linac, a 1.1 GeV Damping Ring, a Booster capable of achieving energies up to 180 GeV, and a Collider operating at varying energy modes (Z, W, H, and ttbar). [...]
arXiv:2312.14363; IHEP-CEPC-DR-2023-01; IHEP-AC-2023-01.- 2024-06-03 - 1106 p. - Published in : Radiat. Detect. Technol. Methods 8 (2024) 1-1105 Fulltext: 2312.14363 - PDF; Publication - PDF;
2.
Collider constraints on electroweakinos in the presence of a light gravitino / GAMBIT Collaboration
Using the GAMBIT global fitting framework, we constrain the MSSM with an eV-scale gravitino as the lightest supersymmetric particle, and the six electroweakinos (neutralinos and charginos) as the only other light new states. We combine 15 ATLAS and 12 CMS searches at 13 TeV, along with a large collection of ATLAS and CMS measurements of Standard Model signatures. [...]
arXiv:2303.09082; TTP23-009; KCL-PH-TH/2023-21; gambit-physics-23; MCnet-23-05, ADP-23-08/T1217; CERN-TH-2023-043.- 2023-06-10 - 38 p. - Published in : Eur. Phys. J. C 83 (2023) 493 Fulltext: document - PDF; 2303.09082 - PDF;
3.
Publishing statistical models: Getting the most out of particle physics experiments / Cranmer, Kyle (New York U.) ; Kraml, Sabine (LPSC, Grenoble) ; Prosper, Harrison B. (Florida State U.) ; Bechtle, Philip (Bonn U.) ; Bernlochner, Florian U. (Bonn U.) ; Bloch, Itay M. (Tel Aviv U. (main)) ; Canonero, Enzo (Genoa U.) ; Chrzaszcz, Marcin (Cracow, INP) ; Coccaro, Andrea (INFN, Genoa) ; Conrad, Jan (Stockholm U., OKC) et al.
The statistical models used to derive the results of experimental analyses are of incredible scientific value and are essential information for analysis preservation and reuse. In this paper, we make the scientific case for systematically publishing the full statistical models and discuss the technical developments that make this practical. [...]
arXiv:2109.04981.- 2022-01-25 - 60 p. - Published in : SciPost Phys. 12 (2022) 037 Fulltext: 2109.04981 - PDF; document - PDF;
4.
Thermal WIMPs and the Scale of New Physics: Global Fits of Dirac Dark Matter Effective Field Theories / GAMBIT Collaboration
We assess the status of a wide class of WIMP dark matter (DM) models in light of the latest experimental results using the global fitting framework $\textsf{GAMBIT}$. We perform a global analysis of effective field theory (EFT) operators describing the interactions between a gauge-singlet Dirac fermion and the Standard Model quarks, the gluons and the photon. [...]
arXiv:2106.02056; ADP-21-9/T1156; CERN-TH-2021-084; CP3-21-15; P3H-21-038; TTK-21-19, gambit-physics-21; TTK-21-19, gambit-physics-2021.- 2021-11-11 - 37 p. - Published in : Eur. Phys. J. C 81 (2021) 992 Fulltext: 2106.02056 - PDF; document - PDF;
5.
Pitfalls in likelihood land / Fowlie, Andrew (speaker) (Nanjing Normal University)
The starting point for a statistically sound reinterpretation of an experimental result is the likelihood function, which encodes the probability of the observed data given an assumed model. When multiple experimental results are considered, as in global fits, a composite likelihood function is used, constructed from likelihood components for all the measurements included in the fit. In most cases the formulation of a likelihood function necessarily involves some approximations. [...]
2021 - 1522. LPCC Workshops; (Re)interpreting the results of new physics searches at the LHC External links: Talk details; Event details In : (Re)interpreting the results of new physics searches at the LHC
6.
Simple and statistically sound recommendations for analysing physical theories / AbdusSalam, Shehu S. (Shahid Beheshti U.) ; Agocs, Fruzsina J. (Cambridge U. ; Cambridge U., KICC) ; Allanach, Benjamin C. (Cambridge U., DAMTP) ; Athron, Peter (Monash U. ; Nanjing Normal U.) ; Balázs, Csaba (Monash U.) ; Bagnaschi, Emanuele (PSI, Villigen) ; Bechtle, Philip (Bonn U.) ; Buchmueller, Oliver (Imperial Coll., London) ; Beniwal, Ankit (Louvain U., CP3) ; Bhom, Jihyun (Cracow, INP) et al.
Physical theories that depend on many parameters or are tested against data from many different experiments pose unique challenges to statistical inference. Many models in particle physics, astrophysics and cosmology fall into one or both of these categories. [...]
arXiv:2012.09874; PSI-PR-20-23; BONN-TH-2020-11; CP3-20-59; KCL-PH-TH/2020-75, P3H-20-080; TTP20-044; TUM-HEP-1310/20; IFT-UAM/CSIC-20-180; TTK-20-47, CERN-TH-2020-215; FTPI-MINN-20-36; UMN-TH-4005/20; HU-EP-20/37; DESY 20-222, ADP-20-33/T1143; DESY-20-222; Imperial/TP/2020/RT/04; UCI-TR-2020-19; gambit-review-2020.- 2022-04-29 - 15 p. - Published in : Rep. Prog. Phys.
Fulltext: PDF;
7.
Statistical Analyses of Higgs- and Z-Portal Dark Matter Models / Ellis, John (NICPB, Tallinn ; CERN ; King's Coll. London) ; Fowlie, Andrew (Monash U.) ; Marzola, Luca (NICPB, Tallinn) ; Raidal, Martti (CERN ; NICPB, Tallinn)
We perform frequentist and Bayesian statistical analyses of Higgs- and Z-portal models of dark matter particles with spin 0, 1/2 and 1. Our analyses incorporate data from direct detection and indirect detection experiments, as well as LHC searches for monojet and monophoton events, and we also analyze the potential impacts of future direct detection experiments. [...]
arXiv:1711.09912; COEPP-MN-17-20; KCL-PH-TH-58; CERN-TH-2017-246.- 2018-06-12 - 18 p. - Published in : Phys. Rev. D 97 (2018) 115014 Article from SCOAP3: PDF; Fulltext: PDF;
8.
Reconstruction of the Higgs mass in events with Higgs bosons decaying into a pair of $\tau$ leptons using matrix element techniques / Bianchini, Lorenzo (Zurich, ETH) ; Calpas, Betty (NICPB, Tallinn) ; Conway, John (UC, Davis) ; Fowlie, Andrew (Monash U.) ; Marzola, Luca (NICPB, Tallinn ; Tartu, Inst. Phys.) ; Veelken, Christian (CERN) ; Perrini, Lucia (NICPB, Tallinn)
We present an algorithm for the reconstruction of the Higgs mass in events with Higgs bosons decaying into a pair of tau leptons. The algorithm is based on matrix element (ME) techniques and achieves a relative resolution on the Higgs boson mass of typically 15-20%. [...]
arXiv:1603.05910; COEPP-MN-16-7.- 2017-08-01 - 31 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 862 (2017) 54-84 Elsevier Open Access article: PDF; Fulltext: 10.1016_j.nima.2017.05.001 - PDF; arXiv:1603.05910 - PDF; External link: Preprint
9.
Reconstructing ATLAS SU3 in the CMSSM and relaxed phenomenological supersymmetry models / Fowlie, Andrew ; Roszkowski, Leszek
Assuming that the LHC makes a positive end-point measurement indicative of low-energy supersymmetry, we examine the prospects of reconstructing the parameter values of a typical low-mass point in the framework of the Constrained MSSM and in several other supersymmetry models that have more free parameters and fewer assumptions than the CMSSM. [...]
arXiv:1106.5117.
- 2011.
Preprint

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