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2024-06-12
04:50
Self-interacting dark matter solves the final parsec problem of supermassive black hole mergers / Alonso-Álvarez, Gonzalo (Toronto U. ; McGill U.) ; Cline, James M. (McGill U. ; CERN) ; Dewar, Caitlyn (McGill U.)
Evidence for a stochastic gravitational wave (GW) background, plausibly originating from the merger of supermassive black holes (SMBHs), is accumulating with observations from pulsar timing arrays. [...]
arXiv:2401.14450 ; CERN-TH-2024-016. - 5 p.
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2024-06-12
04:50
The non-first-order-factorizable contributions to the three-loop single-mass operator matrix elements <math altimg="si1.svg"><msubsup><mrow><mi>A</mi></mrow><mrow><mi>Q</mi><mi>g</mi></mrow><mrow><mo stretchy="false">(</mo><mn>3</mn><mo stretchy="false">)</mo></mrow></msubsup></math> and <math altimg="si2.svg"><mi mathvariant="normal">Δ</mi><msubsup><mrow><mi>A</mi></mrow><mrow><mi>Q</mi><mi>g</mi></mrow><mrow><mo stretchy="false">(</mo><mn>3</mn><mo stretchy="false">)</mo></mrow></msubsup></math> / Ablinger, J. (Linz U. ; Linz U., RISC ; OAW, Linz, RICAM) ; Behring, A. (CERN) ; Blümlein, J. (DESY, Zeuthen ; Dortmund U.) ; De Freitas, A. (Linz U. ; Linz U., RISC ; DESY, Zeuthen) ; von Manteuffel, A. (Regensburg U.) ; Schneider, C. (Linz U. ; Linz U., RISC) ; Schönwald, K. (Zurich U.)
The non-first-order-factorizable contributions (The terms 'first-order-factorizable contributions' and 'non-first-order-factorizable contributions' have been introduced and discussed in Refs. \cite{Behring:2023rlq,Ablinger:2023ahe}. [...]
arXiv:2403.00513; ZU-TH-13/24; DO-TH-23/15; RISC Report series 24-02; CERN-TH-2024-30; DESY-24-027.- 2024-05-13 - 8 p. Fulltext: 2403.00513 - PDF; Publication - PDF;

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2024-06-11
04:44
An event generator for Lepton-Hadron Deep Inelastic Scattering at NLO+PS with POWHEG including mass effects / Buonocore, Luca (CERN) ; Limatola, Giovanni (Turin U.) ; Nason, Paolo (INFN, Milan Bicocca ; Munich, Max Planck Inst.) ; Tramontano, Francesco (CERN ; Naples U.)
We present a generator for lepton nucleon collisions in the DIS regime, focusing in particular on processes with a massive lepton and/or a massive quark in the final state. [...]
CERN-TH-2024-070 ; arXiv:2406.05115. - 51 p.
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2024-06-08
04:56
Recursion for Wilson-line Form Factors / Cohen, Timothy (CERN ; EPFL, Lausanne, LPTP ; U. Oregon, Eugene (main)) ; Riembau, Marc (CERN)
Matrix elements of Wilson-line dressed operators play a central role in the factorization of soft and collinear modes in gauge theories. [...]
CERN-TH-2024-069 ; arXiv:2406.03540. - 28 p.
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2024-06-07
04:42
A new standard for the logarithmic accuracy of parton showers / van Beekveld, Melissa (Nikhef, Amsterdam) ; Dasgupta, Mrinal (Manchester U.) ; El-Menoufi, Basem Kamal (Monash U.) ; Ferrario Ravasio, Silvia (CERN) ; Hamilton, Keith (University Coll. London) ; Helliwell, Jack (Oxford U., Theor. Phys.) ; Karlberg, Alexander (CERN) ; Monni, Pier Francesco (CERN) ; Salam, Gavin P. (Oxford U., Theor. Phys. ; U. Oxford (main)) ; Scyboz, Ludovic (Monash U.) et al.
We report on a major milestone in the construction of logarithmically accurate final-state parton showers, achieving next-to-next-to-leading-logarithmic (NNLL) accuracy for the wide class of observables known as event shapes. [...]
CERN-TH-2024-057 ; OUTP-24-03P ; arXiv:2406.02661. - 19 p.
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2024-06-07
04:40
Electromagnetic (high-frequency) gravitational wave detectors: Interferometers revisited / Domcke, Valerie (CERN) ; Kopp, Joachim (CERN ; Mainz U.)
Increased interest in pushing the frontier of gravitational wave searches to higher frequencies (kHz and beyond) has resulted in a variety of different proposed experimental concepts. [...]
CERN-TH-2024-082 ; arXiv:2406.03244. - 8 p.
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2024-06-06
04:56
Weyl Fermion Creation by Cosmological Gravitational Wave Background at 1-loop / Maleknejad, Azadeh (King's Coll. London) ; Kopp, Joachim (CERN ; Mainz U., Inst. Phys. ; U. Mainz, PRISMA)
Weyl fermions of spin $\frac12$ minimally coupled to Einstein's gravity in 4 dimensions cannot be produced purely gravitationally in an expanding Universe at tree level. [...]
arXiv:2406.01534 ; KCL-PH-TH/2024-33 ; CERN-TH-2024-079 ; MITP-24-054. - 36 p.
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2024-06-05
04:17
The flavor invariants of the $\nu$SM / Grojean, Christophe (DESY ; Humboldt U., Berlin ; CERN) ; Kley, Jonathan (DESY ; Humboldt U., Berlin) ; Leflot, Damien (Annecy, LAPTH) ; Yao, Chang-Yuan (DESY ; Nankai U.)
Sixty years after the experimental discovery of CP violation in the quark sector, the existence of a similar CP violation in the lepton sector is still to be established. [...]
CERN-TH-2024-076 ; DESY-24-021 ; HU-EP-24/14 ; arXiv:2406.00094. - 27 p.
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2024-06-05
04:06
Fermion Mass Generation without Symmetry Breaking / Cresswell-Hogg, Charlie (Sussex U.) ; Litim, Daniel F. (Sussex U. ; CERN)
We study the generation of fermion mass in a context where interactions break a discrete chiral symmetry. [...]
arXiv:2406.00100 ; CERN-TH-2024-077. - 19 p.
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2024-06-04
04:49
A log story short: running contributions to radiative Higgs decays in the SMEFT / Grojean, Christophe (DESY ; Humboldt U., Berlin ; CERN) ; Guedes, Guilherme (DESY) ; Roosmale Nepveu, Jasper (DESY ; Humboldt U., Berlin) ; Salla, Gabriel M. (DESY ; Sao Paulo U., Inst. Math. Stat.)
We investigate the renormalization of the radiative decays of the Higgs to two gauge bosons in the Standard Model Effective Field Theory at mass dimension eight. [...]
arXiv:2405.20371 ; CERN-TH-2024-075 ; DESY-24-077 ; HU-EP-24/15-RTG. - 32 p.
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