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CERN Accelerating science

CERN Theory

Latest additions:
2021-04-22
11:42
Non-abelian infrared divergences on the celestial sphere / Magnea, Lorenzo
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. [...]
CERN-TH-2021-063 ; arXiv:2104.10254.
- 23 p.
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2021-04-22
11:42
$S$-matrix approach to general gravity and beyond / Vanhove, Pierre
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 ; Auffinger, Jérémy ; Sandick, Pearl ; Shams Es Haghi, Barmak ; Sinha, Kuver
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. ; Damgaard, Poul H. ; Planté, Ludovic ; Vanhove, Pierre
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.
- 41 p.
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2021-04-13
04:41
Clean single-valued polylogarithms / Charlton, Steven ; Duhr, Claude ; Gangl, Herbert
We define a variant of real-analytic polylogarithms that are single-valued and that satisfy `clean' functional relations that do not involve any products of lower weight functions. [...]
arXiv:2104.04344 ; CERN-TH-2021-048.
- 36 p.
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2021-04-10
04:18
Swampland Conjectures and Infinite Flop Chains / Brodie, Callum R. (IPhT, Saclay) ; Constantin, Andrei (Oxford U., Theor. Phys. ; U. Oxford (main)) ; Lukas, Andre (Oxford U., Theor. Phys.) ; Ruehle, Fabian (CERN ; Oxford U., Theor. Phys.)
We investigate swampland conjectures for quantum gravity in the context of M-theory compactified on Calabi-Yau threefolds which admit infinite sequences of flops. [...]
arXiv:2104.03325 ; CERN-TH-2021-051.
- 9 p.
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2021-04-09
04:02
The Eikonal Approach to Gravitational Scattering and Radiation at $\mathcal O(G^3)$ / Di Vecchia, Paolo (Bohr Inst. ; Nordita ; Royal Inst. Tech., Stockholm) ; Heissenberg, Carlo (Nordita ; Royal Inst. Tech., Stockholm ; Uppsala U.) ; Russo, Rodolfo (Queen Mary, U. of London) ; Veneziano, Gabriele (CERN ; College de France)
Using $\mathcal N=8$ supergravity as a theoretical laboratory, we extract the 3PM gravitational eikonal for two colliding massive scalars from the classical limit of the corresponding elastic two-loop amplitude. [...]
arXiv:2104.03256 ; CERN-TH-2021-046 ; NORDITA 2021-028 ; QMUL-PH-21-17.
- 88 p.
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2021-04-09
04:00
Consequences of chirally enhanced explanations of $(g-2)_\mu$ for $h\to \mu\mu$ and $Z\to \mu\mu$ / Crivellin, Andreas (CERN ; PSI, Villigen ; Zurich U.) ; Hoferichter, Martin (U. Bern, AEC)
With the long-standing tension between experiment and Standard-Model (SM) prediction in the anomalous magnetic moment of the muon $a_\mu$ recently reaffirmed by the Fermilab experiment, the crucial question becomes which other observables could be sensitive to the underlying physics beyond the SM to which $a_\mu$ may be pointing. [...]
arXiv:2104.03202 ; CERN-TH-2021-050 ; PSI-PR-21-04 ; ZU-TH 14/21.
- 10 p.
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2021-04-03
04:25
Characters of irrelevant deformations / Datta, Shouvik (CERN) ; Jiang, Yunfeng (CERN ; Southeast U., Nanjing)
We analyse the $T\bar{T}$ deformation of 2d CFTs in a special double-scaling limit, of large central charge and small deformation parameter. [...]
arXiv:2104.00281 ; CERN-TH-2021-044.
- 20 p.
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2021-04-03
04:25
D-branes and Orbit Average / Yang, Peihe (Tianjin U.) ; Jiang, Yunfeng (CERN ; Southeast U., Nanjing) ; Komatsu, Shota (CERN ; Princeton, Inst. Advanced Study) ; Wu, Jun-Bao (Tianjin U. ; PCFT, Hefei ; Peking U., CHEP)
We study correlation functions of D-branes and a supergravity mode in AdS, which are dual to structure constants of two sub-determinant operators with large charge and a BPS single-trace operator. [...]
arXiv:2103.16580 ; CERN-TH-2021-043 ; USTC-ICTS/PCFT-21-15.
- 52 p.
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