2022-07-13 04:01 |
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2022-05-10 04:20 |
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2022-04-28 04:03 |
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2022-04-23 10:51 |
Constraints on Multi-Field Inflation from the BOSS Galaxy Survey
/ Cabass, Giovanni (Princeton, Inst. Advanced Study) ; Ivanov, Mikhail M. (Princeton, Inst. Advanced Study) ; Philcox, Oliver H.E. (Princeton U., Astrophys. Sci. Dept. ; Princeton, Inst. Advanced Study) ; Simonović, Marko (CERN) ; Zaldarriaga, Matias (Princeton, Inst. Advanced Study)
We use redshift-space galaxy clustering data from the BOSS survey to constrain local primordial non-Gaussianity (LPNG). This is of particular importance due to the consistency relations, which imply that a detection of LPNG would rule out all single-field inflationary models. [...]
arXiv:2204.01781; CERN-TH-2022-055.-
2022-08-03 - 20 p.
- Published in : Phys. Rev. D 106 (2022) 043506
Fulltext: PDF;
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2022-04-07 04:32 |
The eikonal operator at arbitrary velocities I: the soft-radiation limit
/ Di Vecchia, Paolo (Bohr Inst. ; Nordita ; Stockholm U.) ; Heissenberg, Carlo (Nordita ; Stockholm U. ; Uppsala U.) ; Russo, Rodolfo (Queen Mary, U. of London) ; Veneziano, Gabriele (CERN ; College de France)
Observables related to the real part of the gravitational eikonal, such as the deflection angle and time delay, have been found so far to have a smooth post-Minkowskian (PM) expansion whose validity extends from the non-relativistic to the most extreme ultra-relativistic (UR) regime, which smoothly connects with massless particle collisions. To describe gravitational radiation, the eikonal phase has to be promoted to a unitary operator for which we motivate a proposal and start discussing properties in the soft-radiation limit. [...]
arXiv:2204.02378; CERN-TH-2022-058; NORDITA 2022-022; QMUL-PH-22-14; UUITP-20/22.-
2022-07-07 - 31 p.
- Published in : JHEP 2207 (2022) 039
Fulltext: document - PDF; 2204.02378 - PDF;
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2022-04-02 04:37 |
Light-by-Light Scattering at Future $e^+e^-$ Colliders
/ Ellis, John (King's Coll. London ; NICPB, Tallinn ; CERN) ; Mavromatos, Nick E. (King's Coll. London ; Natl. Tech. U., Athens) ; Roloff, Philipp (CERN) ; You, Tevong (CERN ; Cambridge U., DAMTP ; Cambridge U.)
We study the sensitivity of possible CLIC and FCC-ee measurements of light-by-light scattering to old and new physics, including the Heisenberg-Euler Lagrangian in the Standard Model with possible contributions from loops of additional charged particles or magnetic monopoles, the Born-Infeld extension of QED, and effective dimension-8 operators involving four electromagnetic field strengths as could appear in the Standard Model Effective Field Theory. We find that FCC-ee measurements at 365 GeV and CLIC measurements at 350 GeV would be sensitive to new physics scales of half a TeV in the dimension-8 operator coefficients, and that CLIC measurements at 1.4 TeV or 3 TeV would be sensitive to new physics scales {$\sim 2$ TeV or 5 TeV} at 95% CL, corresponding to probing loops of new particles with masses up to $\sim 3.7$ TeV {for large charges and/or multiple species}. [...]
arXiv:2203.17111; KCL-PH-TH/2022-02; CERN-TH-2022-011.-
2022-07-23 - 26 p.
- Published in : Eur. Phys. J. C
Fulltext: document - PDF; 2203.17111 - PDF;
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2022-03-19 08:55 |
Non-minimally assisted chaotic inflation
/ Hyun, Sang Chul (Yonsei U. ; IPAP, Seoul) ; Kim, Jinsu (CERN) ; Park, Seong Chan (Yonsei U. ; Korea Inst. Advanced Study, Seoul) ; Takahashi, Tomo (Saga U., Japan)
Conventional wisdom says that a chaotic inflation model with a power-law potential is ruled out by the recent Planck-BICEP/Keck results. We find, however, that the model can be assisted by a non-minimally coupled scalar field and still provides a successful inflation. [...]
arXiv:2203.09201; YHEP-COS22-01; KIAS-P22015; CERN-TH-2022-040.-
2022-05-31 - 11 p.
- Published in : JCAP 2205 (2022) 045
Fulltext: document - PDF; 2203.09201 - PDF;
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2022-03-17 05:21 |
DarkSUSY 6.3 – Freeze-in, out-of-equilibrium freeze-out, cosmic-ray upscattering and further new features
/ Bringmann, Torsten (Oslo U. ; CERN) ; Edsjö, Joakim (Stockholm U., OKC)
DarkSUSY is a versatile tool for precision calculations of a large variety of dark matter-related signals, ranging from predictions for the dark matter relic density to dark matter self-interactions and rates relevant for direct and indirect detection experiments. In all of these areas significant new code additions have been made in recent years, since the release of DarkSUSY 6 in 2018, which we summarize in this overview. [...]
arXiv:2203.07439; CERN-TH-2022-031.-
2022-07-14 - 17 p.
- Published in : PoS CompTools2021 (2022) 038
Fulltext: 2203.07439 - PDF; document - PDF;
In : Computational Tools for High Energy Physics and Cosmology, Lyon, France, 22 - 26 Nov 2021, pp.038
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2022-03-16 04:13 |
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2022-03-10 04:32 |
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