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CERN Theory

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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. ; Constantin, Andrei ; Lukas, Andre ; Ruehle, Fabian
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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2021-04-01
04:35
Three-Point Functions in ABJM and Bethe Ansatz / 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 develop an integrability-based framework to compute structure constants of two sub-determinant operators and a single-trace non-BPS operator in ABJM theory in the planar limit. [...]
arXiv:2103.15840 ; CERN-TH-2021-042 ; USTC-ICTS/PCFT-21-14. - 53 p.
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2021-03-31
04:11
Renormalization of the topological charge density in QCD with dimensional regularization / Lüscher, Martin (CERN ; U. Bern, AEC) ; Weisz, Peter (Munich, Max Planck Inst.)
To all orders of perturbation theory, the renormalization of the topological charge density in dimensionally regularized QCD is shown to require no more than an additive renormalization proportional to the divergence of the flavour-singlet axial current. [...]
arXiv:2103.15440 ; CERN-TH-2021-041 ; MPP-2021-38. - 24 p.
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