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2023-06-02
04:05
Composing arbitrarily many $SU(N)$ fundamentals / Polychronakos, Alexios P. (City Coll., N.Y. ; CUNY, Graduate School - U. Ctr.) ; Sfetsos, Konstantinos (Athens U. ; CERN)
We compute the multiplicity of the irreducible representations in the decomposition of the tensor product of an arbitrary number $n$ of fundamental representations of $SU(N)$, and we identify a duality in the representation content of this decomposition. [...]
CERN-TH-2023-085 ; arXiv:2305.19345. - 23 p.
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2023-05-31
04:49
Limits from the grave: resurrecting Hitomi for decaying dark matter and forecasting leading sensitivity for XRISM / Dessert, Christopher (New York U., CCPP ; Flatiron Inst., New York) ; Ning, Orion ; Rodd, Nicholas L. ; Safdi, Benjamin R.
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. [...]
arXiv:2305.17160 ; CERN-TH-2023-088. - 6 p.
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2023-05-30
04:18
Resurgent Asymptotics of Jackiw-Teitelboim Gravity and the Nonperturbative Topological Recursion / Eynard, Bertrand (IPhT, Saclay ; Stanford U., ITP ; Stanford U., Phys. Dept.) ; Garcia-Failde, Elba (Paris, LPTHE) ; Gregori, Paolo (IPhT, Saclay ; Stanford U., ITP ; Stanford U., Phys. Dept. ; Lisbon, IST Maths) ; Lewanski, Danilo (Zurich U., Inst. Math. ; Trieste U.) ; Schiappa, Ricardo (Lisbon, IST Maths)
Jackiw-Teitelboim dilaton-quantum-gravity localizes on a double-scaled random-matrix model, whose perturbative free energy is an asymptotic series. [...]
arXiv:2305.16940 ; CERN-TH-2021-097. - 63 p.
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2023-05-30
04:17
Two-Loop QCD Corrections for Three-Photon Production at Hadron Colliders / Abreu, Samuel (CERN ; U. Edinburgh, Higgs Ctr. Theor. Phys.) ; De Laurentis, Giuseppe ; Ita, Harald ; Klinkert, Maximillian ; Page, Ben (CERN) ; Sotnikov, Vasily (Zurich U. ; Michigan State U.)
We complete the computation of the two-loop helicity amplitudes for the production of three photons at hadron colliders, including all contributions beyond the leading-color approximation. [...]
arXiv:2305.17056 ; CERN-TH-2023-090 ; PSI-PR-23-16 ; ZU-TH 23/23. - 38 p.
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2023-05-25
04:07
Dark Sectors with Mass Thresholds Face Cosmological Datasets / Allali, Itamar J. (Tufts U.) ; Rompineve, Fabrizio (CERN ; Barcelona, IFAE ; Barcelona, Autonoma U.) ; Hertzberg, Mark P. (Tufts U.)
Interacting dark sectors may undergo changes in the number of their relativistic species during the early universe, due to a mass threshold $m$ (similar to changes in the Standard Model bath), and in doing so affect the cosmic history. [...]
arXiv:2305.14166 ; CERN-TH-2023-084. - 18 p.
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2023-05-25
04:05
Electroweak Loop Contributions to the Direct Detection of Wino Dark Matter / Ellis, John (King's Coll. London ; CERN) ; Nagata, Natsumi ; Olive, Keith A. (Minnesota U.) ; Zheng, Jiaming
Electroweak loop corrections to the matrix elements for the spin-independent scattering of cold dark matter particles on nuclei are generally small, typically below the uncertainty in the local density of cold dark matter. [...]
arXiv:2305.13837 ; KCL-PH-TH/2023-27 ; CERN-PH-TH-2023-083 ; FTPI-MINN-23/08, UMN-TH-4214/23. - 27 p.
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2023-05-24
04:53
Thick Wall from Thin Walls / Espinosa, J.R. (Madrid, IFT ; CERN)
An Euclidean bounce describing vacuum decay can be considered as an infinite stack of concentric thin shells to which a thin-wall action can be assigned. [...]
arXiv:2305.06774 ; CERN-TH-2023-075. - 9 p.
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2023-05-24
04:51
Exploring the viability of pseudo Nambu-Goldstone boson as ultralight dark matter in a mass range relevant for strong gravity applications / Morais, António P. (CERN ; U. Aveiro (main)) ; Oliveira, Vinícius (Paraiba U.) ; Onofre, António (Minho U.) ; Pasechnik, Roman (Lund U.) ; Santos, Rui (Lisbon, ISEL ; Lisbon U., CFTC)
We study a simple extension of the Standard Model featuring a dark sector with an ultralight pseudo Nambu-Goldstone boson as dark matter candidate. [...]
arXiv:2305.03776 ; CERN-TH-2023-070. - 23 p.
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2023-05-17
05:47
Next-to-leading-logarithmic PanScales showers for Deep Inelastic Scattering and Vector Boson Fusion / van Beekveld, Melissa (Oxford U., Theor. Phys.) ; Ferrario Ravasio, Silvia (CERN)
We introduce the first family of parton showers that achieve next-to-leading logarithmic (NLL) accuracy for processes involving a $t$-channel exchange of a colour-singlet, and embed them in the PanScales framework. [...]
arXiv:2305.08645 ; CERN-TH-2023-079 ; OUTP-23-05P. - 34 p.
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2023-05-17
05:47
Two-Real-Singlet Model Benchmark Planes -- A Moriond Update / Robens, Tania (Boskovic Inst., Zagreb ; CERN)
I present an update on the the Benchmark Planes in the Two-Real-Singlet Model (TRSM), a model that enhances the Standard Model (SM) scalar sector by two real singlets, where an additional $\mathbb{Z}$$_{2}$$\otimes$$\mathbb{Z}$$_{2}^{'}$symmetry is imposed. [...]
arXiv:2305.08595 ; RBI-ThPhys-2023-12 ; CERN-TH-2023-081. - 4 p.
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