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1.
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Basis for Anomalous Quartic Gauge Couplings
/ Durieux, Gauthier (Louvain U., CP3) ; Remmen, Grant N. (New York U., CCPP) ; Rodd, Nicholas L. (LBL, Berkeley ; UC, Berkeley) ; Éboli, O.J.P. (Sao Paulo U.) ; Gonzalez-Garcia, M.C. (YITP, Stony Brook ; ICREA, Barcelona ; Barcelona, Autonoma U.) ; Kondo, Dan (Tokyo U., IPMU ; Tokyo U., ICRR) ; Murayama, Hitoshi (LBL, Berkeley ; UC, Berkeley ; Tokyo U., IPMU ; Tokyo U., ICRR) ; Okabe, Risshin (Tokyo U., IPMU ; Tokyo U., ICRR)
In this note, we give a definitive basis for the dimension-eight operators leading to quartic - but no cubic - interactions among electroweak gauge bosons. These are often called anomalous quartic gauge couplings, or aQGCs. [...]
arXiv:2411.02483; CERN-LHCEFTWG-2024-002; CERN-LPCC-2024-002.-
Geneva : CERN, 2024 - 8 p.
- Published in : 10.21468/SciPostPhysCommRep.6
Fulltext: CERN-LHCEFTWG-2024-002 - PDF; 2411.02483 - PDF; arXiv v1: PDF;
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4.
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Graviton detection and the quantization of gravity
/ Rodd, Nicholas Llewellyn (speaker) (CERN)
A key dividing line in the dark matter community is between the wave and particle regimes. This division can be applied to any bosonic state, and for gravitational energy density the boundary cuts right through the ultra-high frequency regime. [...]
2023 - 2242.
TH institutes; Ultra-high frequency gravitational waves: where to next ?
External links: Talk details; Event details
In : Ultra-high frequency gravitational waves: where to next ?
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5.
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Graviton detection and the quantization of gravity
/ Carney, Daniel (LBNL, Berkeley) ; Domcke, Valerie (CERN) ; Rodd, Nicholas L. (CERN)
We revisit a question asked by Dyson: "Is a graviton detectable?" We demonstrate that in both Dyson's original sense and in a more modern measurement-theoretic sense, it is possible to construct a detector sensitive to single gravitons, and in fact a variety of existing and near-term gravitational wave detectors can achieve this. However, while such a signal would be consistent with the quantization of the gravitational field, we draw on results from quantum optics to show how the same signal could just as well be explained via classical gravitational waves. [...]
arXiv:2308.12988; CERN-TH-2023-155.-
2024-02-05 - 7 p.
- Published in : Phys. Rev. D 109 (2024) 044009
Fulltext: Publication - PDF; 2308.12988 - PDF; External link: Quanta Magazine article
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Resurrecting Hitomi for Decaying Dark Matter and Forecasting Leading Sensitivity for XRISM
/ Dessert, Christopher (New York U., CCPP ; Flatiron Inst., New York) ; Ning, Orion (UC, Berkeley ; LBL, Berkeley) ; Rodd, Nicholas L. (CERN) ; Safdi, Benjamin R. (UC, Berkeley ; LBL, Berkeley)
The Hitomi X-ray satellite mission carried unique high-resolution spectrometers that were set to revolutionize the search for sterile neutrino dark matter (DM) by looking for narrow X-ray lines arising from DM decays. Unfortunately, the satellite was lost shortly after launch, and to-date the only analysis using Hitomi for DM decay used data taken towards the Perseus cluster. [...]
arXiv:2305.17160; CERN-TH-2023-088.-
2024-05-24 - 7 p.
- Published in : Phys. Rev. Lett. 132 (2024) 211002
Fulltext: PDF;
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Multifield Positivity Bounds for Inflation
/ Freytsis, Marat (Rutgers U., Piscataway) ; Kumar, Soubhik (UC, Berkeley ; LBL, Berkeley) ; Remmen, Grant N. (Santa Barbara, KITP ; UC, Santa Barbara) ; Rodd, Nicholas L. (CERN)
Positivity bounds represent nontrivial limitations on effective field theories (EFTs) if those EFTs are to be completed into a Lorentz-invariant, causal, local, and unitary framework. While such positivity bounds have been applied in a wide array of physical contexts to obtain useful constraints, their application to inflationary EFTs is subtle since Lorentz invariance is spontaneously broken during cosmic inflation. [...]
arXiv:2210.10791; CERN-TH-2022-160.-
2023-09-07 - 43 p.
- Published in : JHEP 2309 (2023) 041
Fulltext: document - PDF; 2210.10791 - PDF;
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10.
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Sensitivity of Spin-Precession Axion Experiments
/ Dror, Jeff A. (UC, Santa Cruz ; UC, Santa Cruz, Inst. Part. Phys.) ; Gori, Stefania (UC, Santa Cruz ; UC, Santa Cruz, Inst. Part. Phys.) ; Leedom, Jacob M. (DESY) ; Rodd, Nicholas L. (CERN)
A leading direction in the hunt for axion dark matter is to search for its influence on nuclear spins. The detection scheme involves polarizing a sample of nuclei within a strong static magnetic field and then looking for a spin precession induced by the oscillating axion field. [...]
arXiv:2210.06481; CERN-TH-2022-163; DESY 22-155.-
2023-05-01 - 7 p.
- Published in : Phys. Rev. Lett. 130 (2023) 181801
Fulltext: 2210.06481 - PDF; Publication - PDF;
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