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2025-01-21
04:14
Parton distributions confront LHC Run II data: a quantitative appraisal / Chiefa, Amedeo (Heriot-Watt U. (main) ; Maxwell Inst. Math. Sci., Edinburgh ; U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Costantini, Mark N. (Cambridge U., DAMTP) ; Cruz-Martinez, Juan (CERN) ; Nocera, Emanuele R. (Turin U. ; INFN, Turin) ; Rabemananjara, Tanjona R. (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Rojo, Juan (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Sharma, Tanishq (Turin U. ; INFN, Turin ; Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Stegeman, Roy (Heriot-Watt U. (main) ; Maxwell Inst. Math. Sci., Edinburgh ; U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Ubiali, Maria (Cambridge U., DAMTP)
We present a systematic comparison of theoretical predictions and various high-precision experimental measurements, specifically of differential cross sections performed by the LHC run II for Drell-Yan gauge boson, top-quark pair, single-inclusive jet and di-jet production, and by HERA for single-inclusive jet and di-jet production. [...]
Nikhef 2025-002 ; Edinburgh 2024/10 ; CERN-TH-2024-16 ; arXiv:2501.10359. - 51.
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2025-01-21
04:10
The Two-Loop Lipatov Vertex in QCD / Abreu, Samuel (U. Edinburgh, Higgs Ctr. Theor. Phys. ; CERN) ; De Laurentis, Giuseppe (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Falcioni, Giulio (U. Zurich (main) ; Turin U.) ; Gardi, Einan (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Milloy, Calum (INFN, Turin) ; Vernazza, Leonardo (INFN, Turin)
High-energy factorization of 2 -> 2 amplitudes in QCD has been recently pushed to the next-to-next-to-leading logarithmic order by determining the three-loop gluon Regge trajectory. [...]
CERN-TH-2024-226 ; ZU-TH 68/24 ; arXiv:2412.20578. - 107.
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2025-01-16
04:44
QED$_\text{r}$: a finite-volume QED action with redistributed spatial zero-momentum modes / Di Carlo, Matteo (CERN ; Edinburgh U.) ; Hansen, Maxwell T. (Edinburgh U.) ; Hermansson-Truedsson, Nils (Edinburgh U. ; Lund U., Dept. Theor. Phys.) ; Portelli, Antonin (Edinburgh U.)
We present a novel finite-volume QED action designed to improve the infinite-volume extrapolation of hadronic observables in precision lattice QCD+QED calculations. [...]
CERN-TH-2025-001 ; arXiv:2501.07936. -
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2025-01-15
05:00
Dynamics of Heavy Quarks in Strongly Coupled $\mathcal{N}=4$ SYM Plasma / Rajagopal, Krishna (MIT, Cambridge, CTP) ; Scheihing-Hitschfeld, Bruno (MIT, Cambridge, CTP ; Santa Barbara, KITP) ; Wiedemann, Urs Achim (CERN)
We calculate the probability distribution $P({\bf k})$ for a heavy quark with velocity $v$ propagating through strongly coupled $\mathcal{N}=4$ SYM plasma in the 't Hooft limit at a temperature $T$ to acquire a momentum ${\bf k}$ due to interactions with the plasma. [...]
CERN-TH-2025-008 ; MIT-CTP/5822 ; arXiv:2501.06289. - 43.
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2025-01-14
04:54
On the extraction of $\alpha_\textit{em}(m_Z^2)$ at Tera-$Z$ / Riembau, Marc (CERN)
The current projected sensitivity on the electromagnetic coupling $\alpha_\textit{em}(m_Z^2)$ represents a bottleneck for the precision electroweak program at FCC-ee. [...]
CERN-TH-2025-005 ; arXiv:2501.05508. - 7.
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2025-01-10
04:11
ALPs coupled to gluons in the GeV mass range -- data-driven and consistent / Ovchynnikov, Maksym ; Zaporozhchenko, Andrii
We present a new, fully consistent framework for describing GeV-scale axion-like particles (ALPs) coupled to gluons. [...]
CERN-TH-2025-006 ; arXiv:2501.04525. - 5.
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2025-01-04
04:17
UHECR measurements and physics at man-made accelerators: mutual constraints / Garzelli, Maria Vittoria (Hamburg U., Inst. Theor. Phys. II ; CERN)
Measurements of the products of UHECR interactions with the Earth's atmosphere, as obtained in Extended Air Shower experiments, offer important information concerning hadronic interactions, which for some aspects overlaps and for many others complements the information extracted by measurements of collisions at human-made accelerators. [...]
CERN-TH-2024-227 ; arXiv:2501.00178. - 8.
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2025-01-01
04:35
Precise Determination of the Strong Coupling Constant from Dijet Cross Sections up to the Multi-TeV Range / Ahmadova, Fazila (Garching, Max Planck Inst. ; U. Zurich (main)) ; Britzger, Daniel (Garching, Max Planck Inst.) ; Chen, Xuan (Shandong U.) ; Gäßler, Johannes (KIT, Karlsruhe, ETP) ; Gehrmann-De Ridder, Aude (U. Zurich (main) ; Zurich, ETH) ; Gehrmann, Thomas (U. Zurich (main)) ; Glover, Nigel (U. Zurich (main) ; Durham U., IPPP) ; Gwenlan, Claire (Oxford U.) ; Heinrich, Gudrun (KIT, Karlsruhe, TP) ; Huss, Alexander (CERN) et al.
We determine the value of the strong coupling $\alpha_\text{s}$ and study its running over a wide range of scales as probed by the dijet production process at hadron colliders, based on an NNLO QCD analysis of LHC dijet data. [...]
CERN-TH-2024-224 ; KA-TP-25-2024 ; MPP-2024-260 ; ZU-TH/01/25 ; arXiv:2412.21165. - 12.
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2025-01-01
04:33
Top-quark pole mass extraction at NNLO accuracy / Alekhin, Sergey (Hamburg U., Inst. Theor. Phys. II) ; Garzelli, Maria Vittoria (Hamburg U., Inst. Theor. Phys. II ; CERN) ; Mazzitelli, Javier (PSI, Villigen) ; Moch, Sven-Olaf (Hamburg U., Inst. Theor. Phys. II) ; Zenaiev, Oleksandr (Hamburg U., Inst. Theor. Phys. II)
We describe our recent NNLO QCD extraction of the top-quark pole mass from fits to experimental data on total inclusive and normalized (multi)-differential cross sections for $t\bar{t} + X$ hadroproduction, using as input various modern PDF + $\alpha_s(M_Z)$ sets. We find top-quark mass values compatible among each other and with the PDG 2024 preferred value..
arXiv:2412.20259; CERN-TH-2024-225.- 2024-12-31 - 6 p. - Published in : 10.22323/1.478.0320 Fulltext: 2412.20259 - PDF; document - PDF;
In : 12th Edition of the Large Hadron Collider Physics Conference, Boston, United States, 3 - 7 Jun 2024, pp.

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2025-01-01
04:32
Planar Six-Point Feynman Integrals for Four-Dimensional Gauge Theories / Abreu, Samuel (CERN ; U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Monni, Pier Francesco (CERN) ; Page, Ben (Gent U.) ; Usovitsch, Johann (CERN ; Humboldt U., Berlin (main))
We compute all planar two-loop six-point Feynman integrals entering scattering observables in massless gauge theories such as QCD. [...]
CERN-TH-2024-221 ; HU-EP-24/40-RTG ; arXiv:2412.19884. - 32.
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