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Indirect $\mathcal{CP}$ probes of the Higgs-top-quark interaction: current LHC constraints and future opportunities
/ Bahl, Henning (DESY) ; Bechtle, Philip (Bonn U.) ; Heinemeyer, Sven (CSIC, Madrid ; Cantabria Inst. of Phys.) ; Katzy, Judith (DESY) ; Klingl, Tobias (Bonn U.) ; Peters, Krisztian (DESY) ; Saimpert, Matthias (CERN) ; Stefaniak, Tim (DESY) ; Weiglein, Georg (DESY)
The $\mathcal{CP}$ structure of the Higgs boson in its coupling to the particles of the Standard Model is amongst the most important Higgs boson properties which have not yet been constrained with high precision. In this study, all relevant inclusive and differential Higgs boson measurements from the ATLAS and CMS experiments are used to constrain the $\mathcal{CP}$-nature of the top-Yukawa interaction. [...]
arXiv:2007.08542; DESY-20-102.-
2020 - 55 p.
- Published in : JHEP 2011 (2020) 127
Article from SCOAP3: PDF; Fulltext: PDF;
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Simulations and performance studies of a MAPS in 65 nm CMOS imaging technology
/ Simancas, Adriana (DESY ; Bonn U.) ; Braach, Justus (CERN ; Hamburg U., Dept. Math.) ; Buschmann, Eric (CERN) ; Chauhan, Ankur (DESY) ; Dannheim, Dominik (CERN) ; Viera, Manuel Del Rio (DESY ; Bonn U.) ; Dort, Katharina (CERN ; Giessen U.) ; Eckstein, Doris (DESY) ; Feindt, Finn (DESY) ; Gregor, Ingrid-Maria (DESY) et al.
Monolithic active pixel sensors (MAPS) produced in a 65 nm CMOS imaging technology are being investigated for applications in particle physics. The MAPS design has a small collection electrode characterized by an input capacitance of ~fF, granting a high signal-to-noise ratio and low power consumption. [...]
arXiv:2402.14524.-
2024-05-03 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1064 (2024) 169414
Fulltext: 2402.14524 - PDF; Publication - PDF;
In : 13th International "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors, Vancouver, Canada, 3 - 8 Dec 2023, pp.169414
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Constraining the ${\mathcal {C}}{\mathcal {P}}$ structure of Higgs-fermion couplings with a global LHC fit, the electron EDM and baryogenesis
/ Bahl, Henning (Chicago U. ; Chicago U., EFI) ; Fuchs, Elina (CERN ; Leibniz U., Hannover ; Braunschweig, Phys. Tech. Bund.) ; Heinemeyer, Sven (Madrid, IFT) ; Katzy, Judith (DESY) ; Menen, Marco (Cologne U. ; Bonn U. ; Braunschweig, Phys. Tech. Bund.) ; Peters, Krisztian (DESY) ; Saimpert, Matthias (IRFU, Saclay) ; Weiglein, Georg (DESY ; Hamburg U., Inst. Exp. Phys. II)
CP violation in the Higgs couplings to fermions is an intriguing, but not yet extensively explored possibility. We use inclusive and differential LHC Higgs boson measurements to fit the CP structure of the Higgs Yukawa couplings. [...]
arXiv:2202.11753; CERN-TH-2021-231; DESY-22-033; EFI-22-1; IFT--UAM/CSIC--21-148.-
2022-07-10 - 52 p.
- Published in : Eur. Phys. J. C 82 (2022) 604
Fulltext: document - PDF; 2202.11753 - PDF;
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Higgs-mass predictions in the MSSM and beyond
/ Slavich, P. (ed.) (Paris, LPTHE) ; Heinemeyer, S. (ed.) (Madrid, Autonoma U. ; Cantabria Inst. of Phys.) ; Bagnaschi, E. (PSI, Villigen) ; Bahl, H. (DESY) ; Goodsell, M. (Paris, LPTHE) ; Haber, H.E. (UC, Santa Cruz, Inst. Part. Phys.) ; Hahn, T. (Munich, Max Planck Inst.) ; Harlander, R. (Aachen, Tech. Hochsch.) ; Hollik, W. (Munich, Max Planck Inst.) ; Lee, G. (Korea U. ; Cornell U., LEPP ; Toronto U.) et al.
Predictions for the Higgs masses are a distinctive feature of supersymmetric extensions of the Standard Model, where they play a crucial role in constraining the parameter space. The discovery of a Higgs boson and the remarkably precise measurement of its mass at the LHC have spurred new efforts aimed at improving the accuracy of the theoretical predictions for the Higgs masses in supersymmetric models. [...]
arXiv:2012.15629; DESY 20-229; DESY-20-229; IFT-UAM/CSIC-20-184; FR-PHENO-2020-021; KA-TP-23-2020; MPP-2020-235; KA-TP-23-2020,
MPP-2020-235; P3H-20-086; TTK-20-53; FERMILAB-PUB-21-575-T.-
2021-05-25 - 71 p.
- Published in : Eur. Phys. J. C 81 (2021) 450
Article from SCOAP3: PDF; Fulltext: fermilab-pub-21-575-t - PDF; 2012.15629 - PDF; External link: Fermilab Library Server
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Small instanton-induced flavor invariants and the axion potential
/ Bedi, Ravneet (Minnesota U.) ; Gherghetta, Tony (Minnesota U.) ; Grojean, Christophe (DESY ; Humboldt U., Berlin ; CERN) ; Guedes, Guilherme (DESY) ; Kley, Jonathan (DESY ; Humboldt U., Berlin) ; Vuong, Pham Ngoc Hoa (DESY)
Small instantons which increase the axion mass due to an appropriate modification of QCD at a UV scale $\Lambda_{\rm SI}$, can also enhance the effect of CP-violating operators to shift the axion potential minimum by an amount, $\theta_{\rm ind}$, proportional to the flavorful couplings in the SMEFT. Since physical observables must be flavor basis independent, we construct a basis of determinant-like flavor invariants that arise from instanton calculations containing the effects of dimension-six CP-odd operators at the scale $\require{cancel}\Lambda_{\cancel{\rm CP}}$. [...]
arXiv:2402.09361; CERN-TH-2024-022; DESY-24-019; HU-EP-24/05; UMN--TH--4313/24.-
2024-06-24 - 49 p.
- Published in : JHEP 2406 (2024) 156
Fulltext: document - PDF; 2402.09361 - PDF;
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Sum rule improved double parton distributions in position space
/ Diehl, M. (DESY) ; Gaunt, J.R. (CERN) ; Lang, D.M. (Regensburg U. ; Munich, Tech. U.) ; Plößl, P. (DESY) ; Schäfer, A. (Regensburg U.)
Models for double parton distributions that are realistic and consistent with theoretical constraints are crucial for a reliable description of double parton scattering. We show how an ansatz that has the correct behaviour in the limit of small transverse distance between the partons can be improved step by step, such as to fulfil the sum rules for double parton distributions with an accuracy around 10%..
arXiv:2001.10428; CERN-TH-2020-014; DESY-20-011.-
2020-05-25 - 19 p.
- Published in : Eur. Phys. J. C 80 (2020) 468
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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Measurement of the cross-section ratio σ$_{ψ(2S)}$/σ$_{J/ψ(1S)}$ in exclusive photoproduction at HERA
/ ZEUS Collaboration
The exclusive photoproduction reactions $\gamma p \to J/\psi(1S) p$ and $\gamma p \to \psi(2S) p$ have been measured at an $ep$ centre-of-mass energy of 318 GeV with the ZEUS detector at HERA using an integrated luminosity of 373 pb$^{-1}$. The measurement was made in the kinematic range $30 < W < 180$ GeV, $Q^2 < 1$ GeV$^2$ and $|t| < 1$ GeV$^2$, where $W$ is the photon--proton centre-of-mass energy, $Q^2$ is the photon virtuality and $t$ is the squared four-momentum transfer at the proton vertex. [...]
arXiv:2206.13343; DESY-22-107.-
2022-12-29 - 27 p.
- Published in : JHEP 2212 (2022) 164
Fulltext: document - PDF; 2206.13343 - PDF;
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Azimuthal correlations in photoproduction and deep inelastic $ep$ scattering at HERA
/ ZEUS Collaboration
Collective behaviour of final-state hadrons, and multiparton interactions are studied in high-multiplicity $ep$ scattering at a centre-of-mass energy $\sqrt{s}=318$ GeV with the ZEUS detector at HERA. Two- and four-particle azimuthal correlations, as well as multiplicity, transverse momentum, and pseudorapidity distributions for charged-particle multiplicities $N_{\textrm ch} \geq 20$ are measured. [...]
arXiv:2106.12377; DESY-21-099.-
2021-12-16 - 27 p.
- Published in : JHEP 2112 (2021) 102
Fulltext: document - PDF; 2106.12377 - PDF;
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