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Letzte Einträge:
2021-05-18
08:39
Primordial Black Holes from First-Order Cosmological Phase Transitions / Baker, Michael J. ; Breitbach, Moritz ; Kopp, Joachim ; Mittnacht, Lukas
We discuss the possibility of forming primordial black holes during a first-order phase transition in the early Universe. [...]
arXiv:2105.07481 ; CERN-TH-2021-079 ; MITP-21-023.
- 7 p.
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2021-05-18
08:38
On factorisation schemes for the electron parton distribution functions in QED / Frixione, Stefano
The electron, positron, and photon Parton Distribution Functions (PDFs) of the unpolarised electron have recently been computed at the next-to-leading logarithmic accuracy in QED, by adopting the $\overline{\rm MS}$ factorisation scheme. [...]
arXiv:2105.06688 ; CERN-TH-2021-078.
- 30 p.
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2021-05-15
04:25
The isotropic attractor solution of axion-SU(2) inflation: Universal isotropization in Bianchi type-I geometory / Wolfson, Ira (SISSA, Trieste) ; Maleknejad, Azadeh (CERN) ; Murata, Tomoaki (Rikkyo U.) ; Komatsu, Eiichiro (Garching, Max Planck Inst. ; Tokyo U., IPMU) ; Kobayashi, Tsutomu (Rikkyo U.)
SU(2) gauge fields coupled to an axion field can acquire an isotropic background solution during inflation. [...]
arXiv:2105.06259 ; CERN-TH-2021-076.
- 23 p.
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2021-05-13
09:51
The Amplitude for Classical Gravitational Scattering at Third Post-Minkowskian Order / Bjerrum-Bohr, N.E.J. (Bohr Inst.) ; Damgaard, P.H. (Bohr Inst. ; CERN) ; Planté, L. (Poincare Inst.) ; Vanhove, P. (IPhT, Saclay ; Higher Sch. of Economics, Moscow ; CERN)
We compute the scattering amplitude for classical black-hole scattering to third order in the Post-Minkowskian expansion, keeping all terms needed to derive the scattering angle to that order from the eikonal formalism. [...]
arXiv:2105.05218 ; IPhT-t21/028 ; CERN-TH-2021-073.
- 33 p.
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2021-05-13
09:51
Complete Set of Feynman Rules for Scalar Leptoquarks / Crivellin, Andreas (CERN ; Zurich U. ; PSI, Villigen) ; Schnell, Luc (Paris, LPTHE ; Zurich, ETH ; Ec. Polytech., Palaiseau (main))
Leptoquarks (LQs) have attracted increasing attention within recent years, mainly since they can explain the flavor anomalies found in $R(D^{(*)})$, $b \rightarrow s \ell^+ \ell^-$ transitions and the anomalous magnetic moment of the muon. [...]
arXiv:2105.04844 ; CERN-TH-2021-074 ; PSI-PR-21-08 ; ZU-TH 19/21.
- 131 p.
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2021-05-13
09:51
r-Process Radioisotopes from Near-Earth Supernovae and Kilonovae / Wang, Xilu ; Clark, Adam M. ; Ellis, John ; Ertel, Adrienne F. ; Fields, Brian D. ; Liu, Zhenghai ; Miller, Jesse A. ; Surman, Rebecca
The astrophysical sites where r-process elements are synthesized remain mysterious: it is clear that neutron-star mergers (kilonovae, KNe) contribute, and some classes of core-collapse supernovae (SNe) are also likely sources of at least the lighter r-process species. [...]
arXiv:2105.05178 ; KCL-PH-TH/2021-03 ; CERN-TH-2021-014 ; N3AS-21-007.
- 43 p.
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2021-05-13
09:51
Quantum spectral problems and isomonodromic deformations / Bershtein, Mikhail ; Gavrylenko, Pavlo ; Grassi, Alba
We develop a self-consistent approach to study the spectral properties of a class of quantum mechanical operators by using the knowledge about monodromies of $2\times 2$ linear systems (Riemann-Hilbert correspondence). [...]
arXiv:2105.00985 ; CERN-TH-2021-070.
- 62 p.
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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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