CERN Accelerating science


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Theory Closing Talk / Giudice, Gian F.
In this talk I make some remarks about the search for the origin of the electroweak scale..
arXiv:2109.07176 ; CERN-TH-2021-134.

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The hadronic contribution to the running of the electromagnetic coupling and electroweak mixing angle / José, Teseo San ; Cè, Marco ; Gérardin, Antoine ; von Hippel, Georg ; Meyer, Harvey B. ; Miura, Kohtaroh ; Ottnad, Konstantin ; Risch, Andreas (NIC, Zeuthen) ; Wilhelm, Jonas ; Wittig, Hartmut
As present and future experiments, on both the energy and precision frontiers, look to identify new physics beyond the Standard Model, we require more precise determinations of fundamental quantities, like the QED and electroweak couplings at various momenta. [...]
arXiv:2109.04537 ; CERN-TH-2021-126 ; DESY-21-137 ; MITP/21-038.
- 9 p.

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Accumulating Evidence for the Associate Production of a Neutral Scalar with Mass around 151 GeV / Crivellin, Andreas (Zurich U. ; PSI, Villigen ; CERN) ; Fang, Yaquan (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS) ; Fischer, Oliver (Liverpool U.) ; Kumar, Abhaya (U. Witwatersrand, Johannesburg, Sch. Phys. ; iThemba LABS) ; Kumar, Mukesh ; Malwa, Elias (U. Witwatersrand, Johannesburg, Sch. Phys. ; iThemba LABS) ; Mellado, Bruce (U. Witwatersrand, Johannesburg, Sch. Phys. ; iThemba LABS) ; Rapheeha, Ntsoko (U. Witwatersrand, Johannesburg, Sch. Phys. ; iThemba LABS) ; Ruan, Xifeng (U. Witwatersrand, Johannesburg, Sch. Phys. ; iThemba LABS) ; Sha, Qiyu (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS ; U. Witwatersrand, Johannesburg, Sch. Phys. ; iThemba LABS)
In recent years, hints for "multi-lepton anomalies" have been accumulated by the analysis of Large Hadron Collider (LHC) data, pointing towards the existence of beyond the Standard Model (SM) Higgs bosons: a new scalar particle $S$ with a mass $m_S$ in the range between $130\,$GeV and $160\,$GeV, produced from the decay of a heavier new scalar particle, $H$ [...]
arXiv:2109.02650 ; ICPP-057 ; PSI-PR-21-21 ; ZU-TH 38/21 ; CERN-TH-2021-129 ; LTH 1267.
- 7 p.

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Gauge-field production during axion inflation in the gradient expansion formalism / Gorbar, E.V. (Taras Shevchenko U. ; BITP, Kiev) ; Schmitz, K. (CERN) ; Sobol, O.O. (Taras Shevchenko U. ; EPFL, Lausanne, LPPC) ; Vilchinskii, S.I. (Taras Shevchenko U. ; EPFL, Lausanne, LPPC)
We study the explosive production of gauge fields during axion inflation in a novel gradient expansion formalism that describes the time evolution of a set of bilinear electromagnetic functions in position space. [...]
arXiv:2109.01651 ; CERN-TH-2021-128.
- 24 p.

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Sterile Neutrinos as Dark Matter Candidates / Kopp, Joachim (CERN ; Mainz U.)
In these brief lecture notes, we introduce sterile neutrinos as dark matter candidates. [...]
arXiv:2109.00767 ; CERN-TH-2021-127.
- 10 p.

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From Minimal Strings towards Jackiw-Teitelboim Gravity: On their Resurgence, Resonance, and Black Holes / Gregori, Paolo (Lisbon, IST Maths) ; Schiappa, Ricardo (Lisbon, IST Maths ; CERN)
Two remarkable facts about JT two-dimensional dilaton-gravity have been recently uncovered: this theory is dual to an ensemble of quantum mechanical theories; and such ensemble is described by a random matrix model which itself may be regarded as a special (large matter-central-charge) limit of minimal string theory [...]
arXiv:2108.11409 ; CERN-TH-2021-096.
- 107 p.

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Geodesics in the extended Kähler cone of Calabi-Yau threefolds / Brodie, Callum R. (IPhT, Saclay) ; Constantin, Andrei (Oxford U., Theor. Phys.) ; Lukas, Andre (Oxford U., Theor. Phys.) ; Ruehle, Fabian (Oxford U., Theor. Phys. ; CERN)
We present a detailed study of the effective cones of Calabi-Yau threefolds with $h^{1,1}=2$, including the possible types of walls bounding the Kähler cone and a classification of the intersection forms arising in the geometrical phases. [...]
arXiv:2108.10323 ; CERN-TH-2021-123.
- 42 p.

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Cosmological Relaxation through the Dark Axion Portal / Domcke, Valerie (CERN ; Ecole Polytechnique, Lausanne) ; Schmitz, Kai (CERN) ; You, Tevong (CERN ; Cambridge U., DAMTP ; Cambridge U.)
The dark axion portal is a coupling of an axion-like particle to a dark photon kinetically mixed with the visible photon. [...]
arXiv:2108.11295 ; CERN-TH-2021-125.
- 33 p.

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Gravitational Wave and CMB Probes of Axion Kination / Co, Raymond T. (Minnesota U., Theor. Phys. Inst.) ; Dunsky, David (UC, Berkeley ; LBL, Berkeley) ; Fernandez, Nicolas (Illinois U., Urbana) ; Ghalsasi, Akshay (Pittsburgh U.) ; Hall, Lawrence J. (UC, Berkeley ; LBL, Berkeley) ; Harigaya, Keisuke (CERN ; Princeton, Inst. Advanced Study) ; Shelton, Jessie (Illinois U., Urbana)
Rotations of an axion field in field space provide a natural origin for an era of kination domination, where the energy density is dominated by the kinetic term of the axion field, preceded by an early era of matter domination. [...]
arXiv:2108.09299 ; UMN-TH-4023/21 ; FTPI-MINN-21-15 ; CERN-TH-2021-124.
- 52 p.

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Prospective Sensitivities of Atom Interferometers to Gravitational Waves and Ultralight Dark Matter / Badurina, Leonardo (King's Coll. London) ; Buchmueller, Oliver (Imperial Coll., London) ; Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Lewicki, Marek (Warsaw U.) ; McCabe, Christopher (King's Coll. London) ; Vaskonen, Ville (Barcelona, IFAE)
We survey the prospective sensitivities of terrestrial and space-borne atom interferometers (AIs) to gravitat- ional waves (GWs) generated by cosmological and astrophysical sources, and to ultralight dark matter. [...]
arXiv:2108.02468 ; AION-REPORT/2021-04 ; KCL-PH-TH/2021-61 ; CERN-TH-2021-116.
- 18 p.

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