2022-02-22 04:12 |
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2022-01-21 04:06 |
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2022-01-19 08:05 |
Dark radiation constraints on light primordial black holes
/ Auffinger, Jérémy (IP2I, Lyon) ; Arbey, Alexandre (IP2I, Lyon ; CERN ; IUF, Paris) ; Sandick, Pearl (Utah U.) ; Haghi, Barmak Shams Es (Utah U.) ; Sinha, Kuver (Oklahoma U.)
Light black holes could have formed in the very early universe through the collapse of large primordial density fluctuations. These primordial black holes (PBHs), if light enough, would have evaporated by now because of the emission of Hawking radiation; thus they could not represent a sizable fraction of dark matter today. [...]
arXiv:2201.04946; CERN-TH-2021-169.-
2022 - 6 p.
- Published in : PoS EPS-HEP2021 (2022) 147
Fulltext: document - PDF; 2201.04946 - PDF;
In : European Physics Society conference on High Energy Physics 2021, Online, Online, 26 - 30 Jul 2021, pp.147
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2022-01-12 04:16 |
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2022-01-04 04:16 |
Gravitational portals in the early Universe
/ Clery, Simon (IJCLab, Orsay) ; Mambrini, Yann (IJCLab, Orsay ; CERN) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Verner, Sarunas (Minnesota U., Theor. Phys. Inst.)
We consider the production of matter and radiation during reheating after inflation, restricting our attention solely to gravitational interactions. Processes considered are the exchange of a graviton, $h_{\mu \nu}$, involved in the scattering of the inflaton or particles in the newly created radiation bath. [...]
arXiv:2112.15214; UMN-TH-4110/22; FTPI-MINN-22/02; CERN-TH-2021-222.-
2022-04-01 - 15 p.
- Published in : Phys. Rev. D 105 (2022) 075005
Fulltext: PDF;
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2021-12-24 09:18 |
Top-pair production at the LHC with MiNNLO$_{\rm PS}$
/ Mazzitelli, Javier (Munich, Max Planck Inst.) ; Monni, Pier Francesco (CERN) ; Nason, Paolo (INFN, Milan Bicocca) ; Re, Emanuele (INFN, Milan Bicocca ; Annecy, LAPTH) ; Wiesemann, Marius (Munich, Max Planck Inst.) ; Zanderighi, Giulia (Munich, Max Planck Inst. ; Tech. U., Munich (main))
We consider the production of a pair of heavy quarks and illustrate the derivation of the MiNNLO method to match next-to-next-to-leading order calculations with parton showers (NNLO+PS) for this class of processes. As a first application, we construct an event generator for the fully differential simulation of hadronic top-quark pair production at NNLO+PS and discuss all details of its implementation in a parton shower Monte Carlo framework. [...]
arXiv:2112.12135; CERN-TH-2021-220; MPP-2021-211; LAPTH-046/21; CERN-TH-2021-220,MPP-2021-211,LAPTH-046/21.-
2022-04-13 - 55 p.
- Published in : JHEP 2204 (2022) 079
Fulltext: document - PDF; 2112.12135 - PDF;
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2021-12-23 05:12 |
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2021-12-23 04:54 |
Disentangling the Regge cut and Regge pole in perturbative QCD
/ Falcioni, Giulio (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Gardi, Einan (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Maher, Niamh (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Milloy, Calum (INFN, Turin ; Turin U.) ; Vernazza, Leonardo (INFN, Turin ; Turin U. ; CERN)
The high-energy limit of gauge-theory amplitudes features both a Regge pole and Regge cuts. We show how to disentangle these, and hence how to determine the Regge trajectory beyond two loops. [...]
arXiv:2112.11098; CERN-TH-2021-225.-
2022-03-30 - 7 p.
- Published in : Phys. Rev. Lett. 128 (2022) 132001
Fulltext: PhysRevLett.128.132001 - PDF; 2112.11098 - PDF;
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2021-12-21 04:55 |
On-shell Higgsing for EFTs
/ Balkin, Reuven (Technion) ; Durieux, Gauthier (CERN) ; Kitahara, Teppei (Nagoya U., ISEE ; KMI, Nagoya) ; Shadmi, Yael (Technion) ; Weiss, Yaniv (Technion)
We study the on-shell version of the Higgs mechanism in effective theories (EFTs) containing particles of different spins, focusing on contact terms as a simple starting point. We derive the massive contact terms and their coefficients from the massless amplitudes of the EFT above the symmetry breaking scale, by covariantizing the massless contact terms under the massive little group. [...]
arXiv:2112.09688; CERN-TH-2021-212.-
2022-03-21 - 41 p.
- Published in : JHEP 2203 (2022) 129
Fulltext: 2112.09688 - PDF; document - PDF;
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2021-12-16 18:05 |
Implications of LHCb Data for Lepton Flavour Universality Violation
/ Neshatpour, Siavash (INFN, Naples) ; Hurth, Tobias (U. Mainz, PRISMA) ; Mahmoudi, Farvah (CERN ; IP2I, Lyon) ; Martinez Santos, Diego (Santiago de Compostela U.)
We analyse the new physics implications of theoretically clean $b \to s$ observables in a model-independent approach and compare their coherence with the implications of other rare $B$-decays. A statistical comparison is done between the New Physics explanation and hadronic contributions as the source of the anomalies in angular observables of the $B\to K^*\mu\mu$ decay. [...]
arXiv:2112.08343; CERN-TH-2021-180; MITP-21-053.-
2022 - 6 p.
- Published in : PoS: EPS-HEP2021 (2022) , pp. 564
Fulltext: 2112.08343 - PDF; document - PDF;
In : European Physics Society conference on High Energy Physics 2021, Online, Online, 26 - 30 Jul 2021, pp.564
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