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TH Preprints

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2023-09-27
10:02
Three-loop $b\to s\gamma$ vertex with current-current operators / Fael, Matteo (CERN) ; Lange, Fabian (KIT, Karlsruhe, TTP ; KIT, Karlsruhe, IAP) ; Schönwald, Kay (Zurich U.) ; Steinhauser, Matthias (KIT, Karlsruhe, TTP)
We compute three-loop vertex corrections to $b\to s\gamma$ induced by current-current operators. [...]
arXiv:2309.14706 ; CERN-TH-2023-148 ; P3H-23-059 ; TTP23-035 ; ZU-TH 56/23. - 22 p.
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2023-09-20
08:34
Higgs boson pair production at NLO in the POWHEG approach and the top quark mass uncertainties / Bagnaschi, Emanuele (CERN) ; Degrassi, Giuseppe (Rome III U.) ; Gröber, Ramona (Padua U. ; INFN, Padua)
We present a new Monte Carlo code for Higgs boson pair production at next-to-leading order in the POWHEG-BOX Monte Carlo approach. [...]
arXiv:2309.10525 ; CERN-TH-2023-131. - 21 p.
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2023-09-19
07:40
The LHC as a Neutrino-Ion Collider / Cruz-Martinez, Juan M. (CERN) ; Fieg, Max (UC, Irvine) ; Giani, Tommaso (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Krack, Peter (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Mäkelä, Toni (NCBJ, Warsaw) ; Rabemananjara, Tanjona (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Rojo, Juan (Vrije U., Amsterdam ; NIKHEF, Amsterdam)
Proton-proton collisions at the LHC generate a high-intensity collimated beam of neutrinos in the forward (beam) direction, characterised by energies of up to several TeV. [...]
arXiv:2309.09581 ; Nikhef-2023-009 ; CERN-TH-2023-165. - 37 p.
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2023-09-19
07:34
Simulation-based inference for stochastic gravitational wave background data analysis / Alvey, James (U. Amsterdam, GRAPPA) ; Bhardwaj, Uddipta (U. Amsterdam, GRAPPA) ; Domcke, Valerie (CERN) ; Pieroni, Mauro (CERN) ; Weniger, Christoph (U. Amsterdam, GRAPPA)
The next generation of space- and ground-based facilities promise to reveal an entirely new picture of the gravitational wave sky: thousands of galactic and extragalactic binary signals, as well as stochastic gravitational wave backgrounds (SGWBs) of unresolved astrophysical and possibly cosmological signals. [...]
arXiv:2309.07954 ; CERN-TH-2023-167. - 6 p.
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2023-09-08
05:37
QED effects in inclusive semi-leptonic $B$ decays / Bigi, Dante ; Bordone, Marzia (CERN) ; Gambino, Paolo (Turin U. ; Munich, Max Planck Inst. ; Munich, Tech. U.) ; Haisch, Ulrich (Munich, Max Planck Inst.) ; Piccione, Andrea (Turin U.)
We perform a detailed analysis of QED corrections to the total decay width and the electron energy spectrum of the inclusive semi-leptonic $B \to X_c e \nu$ decay. [...]
arXiv:2309.02849 ; CERN-TH-2023-145 ; MPP-2023-186. - 40 p.
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2023-09-02
06:13
Probing Neutral Triple Gauge Couplings with $Z^* \gamma\, (\nu \bar \nu \gamma)$ Production at Hadron Colliders / Ellis, John (King's Coll. London ; CERN ; Shanghai Jiao Tong U.) ; He, Hong-Jian (Shanghai Jiaotong U. ; Tsinghua U., Beijing ; Peking U.) ; Xiao, Rui-Qing (King's Coll. London ; Shanghai Jiao Tong U.)
We study probes of neutral triple gauge couplings (nTGCs) via $Z^*\gamma$ production followed by off-shell decays $Z^*\to\nu\bar{\nu}$ at the LHC and future $pp$ colliders, including both CP-conserving (CPC) and CP-violating (CPV) couplings. [...]
arXiv:2308.16887 ; KCL-PH-TH/2023-39 ; CERN-TH-2023-129. -
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2023-09-01
06:27
From the string vacuum to FLRW or de Sitter via $\alpha'$ corrections / Conzinu, P. (Pisa U. ; INFN, Pisa) ; Fanizza, G. (Lisbon U.) ; Gasperini, M. (Bari U. ; INFN, Bari) ; Pavone, E. (Bari U. ; INFN, Bari) ; Tedesco, L. (Bari U. ; INFN, Bari) ; Veneziano, G. (CERN ; College de France)
We first make more precise a recent "Hamiltonian" reformulation of the Hohm-Zwiebach approach to the tree-level, $O(d,d)$-invariant string cosmology equations at all orders in the $\alpha'$ expansion, and recall how it allows to give a simple characterization of a large class of cosmological scenarios connecting, through a non-singular bounce, two duality-related perturbative solutions at early and late times. [...]
arXiv:2308.16076 ; BA-TH/808-23 ; CERN-TH-2023-163. - 30 p.
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2023-08-29
09:03
Training Neural Networks with Universal Adiabatic Quantum Computing / Abel, Steve (Durham U., IPPP ; CERN) ; Criado, Juan Carlos (Granada U., Theor. Phys. Astrophys.) ; Spannowsky, Michael (Durham U., IPPP)
The training of neural networks (NNs) is a computationally intensive task requiring significant time and resources. [...]
arXiv:2308.13028 ; IPPP/23/46 ; CERN-TH-2023-162. - 14 p.
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2023-08-29
08:05
Graviton detection and the quantization of gravity / Carney, Daniel (LBNL, Berkeley) ; Domcke, Valerie (CERN) ; Rodd, Nicholas L. (CERN)
We revisit a question asked by Dyson: "Is a graviton detectable?" We demonstrate that in both Dyson's original sense and in a more modern measurement-theoretic sense, it is possible to construct a detector sensitive to single gravitons, and in fact a variety of existing and near-term gravitational wave detectors can achieve this. [...]
arXiv:2308.12988 ; CERN-TH-2023-155. - 7 p.
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2023-08-24
04:28
A Survey of Neutrino Flavor Models and the Neutrinoless Double Beta Decay Funnel / Denton, Peter B. (Brookhaven) ; Gehrlein, Julia (Colorado State U., Fort Collins ; CERN ; Brookhaven)
The neutrinoless double beta decay experimental effort continues to make tremendous progress with hopes of covering the inverted neutrino mass hierarchy in coming years and pushing from the quasi-degenerate hierarchy into the normal hierarchy. [...]
arXiv:2308.09737 ; CERN-TH-2023-160 ; CETUP-2023-006. - 42 p.
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