CERN Accelerating science

TH Preprints

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2021-05-12
04:00
Exact WKB methods in $SU(2)$$N_f=1$ / Grassi, Alba (U. Geneva (main) ; CERN) ; Hao, Qianyu (Texas U.) ; Neitzke, Andrew (Yale U., Math. Dept.)
We study in detail the Schrödinger equation corresponding to the four dimensional $SU(2)$$\mathcal{N}=2$ SQCD theory with one flavour. [...]
arXiv:2105.03777 ; UTTG 03-2021 ; CERN-TH-2021-071.
- 63 p.
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2021-05-12
04:00
CMB from a Gauss-Bonnet-induced de Sitter fixed point / Kawai, Shinsuke (Sungkyunkwan U.) ; Kim, Jinsu (CERN)
In gravitational effective theories including higher curvature terms, cosmological solutions can have nontrivial de Sitter fixed points. [...]
arXiv:2105.04386 ; CERN-TH-2021-075.
- 12 p.
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2021-05-06
04:13
Axion Dark Matter: What is it and Why Now? / Chadha-Day, Francesca (Durham U., IPPP) ; Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Marsh, David J.E. (King's Coll. London)
The axion has emerged in recent years as a leading particle candidate to provide the mysterious dark matter in the cosmos, as we review here for a general scientific audience. [...]
arXiv:2105.01406 ; KCL-PH-TH/2021-20 ; CERN-TH-2021-045 ; IPPP/20/91.
- 23 p.
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2021-05-05
04:00
Storage Rings and Gravitational Waves: Summary and Outlook / Berlin, A. (New York U.) ; Brüggen, M. (Hamburg U.) ; Buchmueller, O. (Imperial Coll., London) ; Chen, P. (Taiwan, Natl. Taiwan U.) ; D'Agnolo, R.T. (IMCCE, Paris) ; Deng, R. (CAS, SARI, Shanghai) ; Ellis, J.R. (King's Coll. London) ; Ellis, S. (IMCCE, Paris) ; Franchetti, G. (Darmstadt, GSI) ; Ivanov, A. (Vienna U.) et al.
We report some highlights from the ARIES APEC workshop on ``Storage Rings and Gravitational Waves'' (SRGW2021), held in virtual space from 2 February to 18 March 2021, and sketch a tentative landscape for using accelerators and associated technologies for the detection or generation of gravitational waves..
arXiv:2105.00992 ; KCL-PH-TH/2021-28 ; CERN-TH-2021-068.
- 17 p.
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2021-05-01
04:40
Following in Tini's Giant Footsteps / Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn)
This paper describes my personal appreciation of some of Tini Veltman's great research achievements and how my own research career has followed the pathways he opened. [...]
arXiv:2104.14479 ; KCL-PH-TH/2021-27 ; CERN-TH-2021-067.
- 13 p.
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2021-04-24
04:23
Hamiltonian truncation in Anti-de Sitter spacetime / Hogervorst, Matthijs (EPFL, Lausanne, FSL) ; Meineri, Marco (EPFL, Lausanne, FSL ; CERN) ; Penedones, João (EPFL, Lausanne, FSL) ; Salehi Vaziri, Kamran (EPFL, Lausanne, FSL)
Quantum Field Theories (QFTs) in Anti-de Sitter (AdS) spacetime are often strongly coupled when the radius of AdS is large, and few methods are available to study them. [...]
arXiv:2104.10689 ; CERN-TH-2021-065.
- 100 p.
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2021-04-22
11:42
Non-abelian infrared divergences on the celestial sphere / Magnea, Lorenzo (CERN ; INFN, Turin ; Turin U.)
We consider the infrared factorisation of non-abelian multi-particle scattering amplitudes, and we study the form of the universal colour operator responsible for infrared divergences, when expressed in terms of coordinates on the `celestial sphere' intersecting the future light-cone at asymptotic distances. [...]
arXiv:2104.10254 ; CERN-TH-2021-063.
- 23 p.
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2021-04-22
11:42
$S$-matrix approach to general gravity and beyond / Vanhove, Pierre (IPhT, Saclay ; CERN)
In this text we outline the motivation for developping a quantum $S$-matrix approach for the classical gravitational two-body scattering. [...]
arXiv:2104.10148 ; IPhT-T21/019 ; CERN-TH-2021-062.
- 8 p.
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2021-04-15
05:11
Precision Calculation of Dark Radiation from Spinning Primordial Black Holes and Early Matter Dominated Eras / Arbey, Alexandre (IP2I, Lyon ; CERN ; IUF, Paris) ; Auffinger, Jérémy (IP2I, Lyon) ; Sandick, Pearl (Utah U.) ; Shams Es Haghi, Barmak (Utah U.) ; Sinha, Kuver (Oklahoma U.)
We present precision calculations of dark radiation in the form of gravitons coming from Hawking evaporation of spinning primordial black holes (PBHs) in the early Universe. [...]
arXiv:2104.04051 ; CERN-TH-2021-049.
- 20 p.
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2021-04-13
04:41
Classical Gravity from Loop Amplitudes / Bjerrum-Bohr, N. Emil J. (Bohr Inst.) ; Damgaard, Poul H. (Bohr Inst. ; CERN) ; Planté, Ludovic (Unlisted, FR) ; Vanhove, Pierre (IPhT, Saclay ; Higher Sch. of Economics, Moscow ; CERN)
We describe an efficient method for extracting the parts of $D$-dimensional loop integrals that are needed to derive observables in classical general relativity from scattering amplitudes. [...]
arXiv:2104.04510 ; IPhT-t21/015 ; CERN-TH-2021-052.
- 42 p.
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