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TH Preprints

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2023-12-08
04:35
Revisiting the averaged annihilation rate of thermal relics at low temperature / Arbey, A. ; Mahmoudi, N.F. ; Palmiotto, M.
We derive a low-temperature expansion of the formula to compute the average annihilation rate $\langle \sigma v \rangle$ for dark matter in $\mathbb{Z}_2$-symmetric models, both in the absence and the presence of mass degeneracy in the spectrum near the dark matter candidate. [...]
CERN-TH-2023-232 ; arXiv:2312.03695. -
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2023-12-07
04:28
Probing supermassive black hole seed scenarios with gravitational wave measurements / Ellis, John ; Fairbairn, Malcolm ; Urrutia, Juan ; Vaskonen, Ville
The process whereby the supermassive black holes populating the centers of galaxies have been assembled remains to be established, with the relative importance of seeds provided by collapsed Population-III stars, black holes formed in nuclear star clusters via repeated mergers, or direct collapses of protogalactic disks yet to be determined. [...]
KCL-PH-TH/2023-69 ; CERN-TH-2023-227 ; arXiv:2312.02983. - 7 p.
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2023-12-06
04:32
Learning Feynman integrals from differential equations with neural networks / Calisto, Francesco ; Moodie, Ryan ; Zoia, Simone
We present a new approach for evaluating Feynman integrals numerically. [...]
arXiv:2312.02067 ; CERN-TH-2023-225. - 27 p.
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2023-12-02
08:43
A Non-Perturbative Mixed Anomaly and Fractional Hydrodynamic Transport / Davighi, Joe ; Lohitsiri, Nakarin ; Poovuttikul, Napat
We present a new non-perturbative 't Hooft anomaly afflicting a quantum field theory with symmetry group $G=U(1)\times \mathbb{Z}_2$ in four dimensions. [...]
arXiv:2311.18023 ; CERN-TH-2023-213. - 9 p.
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2023-11-30
04:57
Finite Feynman Integrals / Gambuti, Giulio (Oxford U., Theor. Phys.) ; Kosower, David A. (IPhT, Saclay ; CERN) ; Novichkov, Pavel P. (IPhT, Saclay) ; Tancredi, Lorenzo (Munich, Tech. U.)
We describe an algorithm to organize Feynman integrals in terms of their infrared properties. [...]
arXiv:2311.16907 ; TUM-HEP-1483/23 ; OUTP-23-13P ; CERN-TH-2023-218. - 35 p.
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2023-11-30
04:44
ALPs, the on-shell way / Bertuzzo, Enrico (Sao Paulo U. ; Modena U.) ; Grojean, Christophe (DESY ; Humboldt U., Berlin ; CERN) ; Salla, Gabriel M. (Sao Paulo U. ; DESY)
We study how the coupling between axion-like particles (ALPs) and matter can be obtained at the level of on-shell scattering amplitudes. [...]
arXiv:2311.16253 ; CERN-TH-2023-202 ; DESY-23-090 ; HU-EP-23/21. - 50 p.
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2023-11-29
04:27
Precise QCD predictions for W-boson production in association with a charm jet / Gehrmann-De Ridder, A. ; Gehrmann, T. ; Glover, E.W.N. ; Huss, A. ; Garcia, A. Rodriguez ; Stagnitto, G.
The production of a $W$-boson with a charm quark jet provides a highly sensitive probe of the strange quark distribution in the proton. [...]
arXiv:2311.14991 ; ZU-TH 76/23 ; IPPP/23/69 ; CERN-TH-2023-217. - 26 p.
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2023-11-28
08:42
Relating $\beta'_*$ and $\gamma'_{Q*}$ in the ${\cal N}=1$ SQCD Conformal Window / Shifman, Mikhail (Minnesota U., Theor. Phys. Inst.) ; Zwicky, Roman (U. Edinburgh, Higgs Ctr. Theor. Phys. ; CERN)
In this note we show that $\beta'_*$, the $\beta$-function slopes in the electric and magnetic theories are equal at the corresponding infrared fixed points. [...]
arXiv:2310.16449 ; FTPI-MINN-23-19 ; CERN-TH-2023-188 ; UMN-TH-4227/23. - 16 p.
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2023-11-28
08:40
The Stringy S-matrix Bootstrap: Maximal Spin and Superpolynomial Softness / Häring, Kelian (CERN ; Ecole Polytechnique, Lausanne) ; Zhiboedov, Alexander (CERN)
We explore the space of meromorphic amplitudes with extra constraints coming from the shape of the leading Regge trajectory. [...]
arXiv:2311.13631 ; CERN-TH-2023-214. - 63 p.
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2023-11-22
04:08
Probing primordial black holes at high redshift with future gravitational wave detector / Marcoccia, Paolo ; Nardini, Germano ; Pieroni, Mauro
We analyze the detection prospects for potential Primordial Black Hole Binary (PBHB) populations buried in the Stellar-Origin Black Hole Binary (SOBHB) population inferred by the LVK collaboration. [...]
arXiv:2311.11760 ; CERN-TH-2023-211. - 31 p.
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