2025-01-29
05:07 |
Are Parton Showers Inside a Quark-Gluon Plasma Strongly Coupled? A Theorist's Test
/ Arnold, Peter (Virginia U.) ; Elgedawy, Omar (Virginia U. ; South China Normal U. ; Cape Town U., Dept. Math. ; Guangzhou U.) ; Iqbal, Shahin (Quaid-i-Azam U. ; CERN)
We study whether in-medium showers of high-energy quarks and gluons can be treated as a sequence of individual splitting processes or whether there is significant quantum overlap between where one splitting ends and the next begins. Accounting for the Landau-Pomeranchuk-Migdal (LPM) effect, we calculate such overlap effects to leading order in high-energy $\alpha_s(\mu)$ for the simplest theoretical situation. [...]
arXiv:2501.15115; CERN-TH-2024-163.-
2024-12-17 - 7 p.
- Published in : PoS: ICHEP2024 (2025) , pp. 582
Fulltext: 2501.15115 - PDF; document - PDF;
In : 42nd International Conference on High Energy Physics (ICHEP 2024), Prague, Czech Republic, 18 - 24 Jul 2024, pp.582
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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 : PoS: LHCP2024 (2025) , pp. 320
Fulltext: 2412.20259 - PDF; document - PDF;
In : 12th Edition of the Large Hadron Collider Physics Conference, Boston, United States, 3 - 7 Jun 2024, pp.320
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2024-12-21
04:16 |
NNLO fits of top-quark mass using total, single-differential and double-differential $t\bar{t}+X$ cross-section data
/ Alekhin, Sergey (Hamburg U., Inst. Theor. Phys. II) ; Garzelli, Maria Vittoria (Hamburg U., Inst. Theor. Phys. II ; CERN ; Cagliari U.) ; Mazzitelli, Javier (PSI, Villigen) ; Moch, Sven-Olaf (Hamburg U., Inst. Theor. Phys. II) ; Zenaiev, Oleksandr (Hamburg U., Inst. Theor. Phys. II)
We describe the fits of the top-quark mass value at NNLO using as input the double-differential distributions in rapidity and invariant mass of $t\bar{t}$ pairs obtained by the ATLAS and CMS collaborations from unfolding of their experimental data to the parton level, compared to NNLO theory predictions. We consider different state-of-the-art PDF sets, finding results of the fits compatible among each other within uncertainties. [...]
arXiv:2412.14348; CERN-TH-2024-220.-
2024-12-29 - 4 p.
- Published in : PoS ICHEP2024 (2024) 393
Fulltext: 2412.14348 - PDF; document - PDF;
In : 42nd International Conference on High Energy Physics (ICHEP 2024), Prague, Czech Republic, 18 - 24 Jul 2024, pp.393
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2024-11-01
04:13 |
Event generation with Sherpa 3
/ Sherpa Collaboration
Sherpa is a general-purpose Monte Carlo event generator for the simulation of particle collisions in high-energy collider experiments. We summarise new developments, essential features, and ongoing improvements within the Sherpa 3 release series. [...]
arXiv:2410.22148; IPPP/24/67; LTH-1385; FERMILAB-PUB-24-0748-T; ZU-TH 51/24; MCNET-24-17; CERN-TH-2024-171.-
2024-12-20 - 55 p.
- Published in : JHEP 2412 (2024) 156
Fulltext: 2410.22148 - PDF; ab734587330dddd7c27e53d99cd0646e - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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2024-10-25
12:03 |
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2024-10-22
04:21 |
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2024-10-12
09:15 |
Frozen Generalized Symmetries
/ Cvetič, Mirjam (Pennsylvania U., Dept. Math. ; Pennsylvania U. ; Maribor U.) ; Dierigl, Markus (Munich U., ASC ; CERN) ; Lin, Ling (Bologna U. ; INFN, Bologna) ; Torres, Ethan (CERN) ; Zhang, Hao Y. (Tokyo U., IPMU)
M-theory frozen singularities are (locally) $D$- or $E$-type orbifold singularities with a background fractional $C_3$-monodromy surrounding them. In this paper, we revisit such backgrounds and address several puzzling features of their physics. [...]
arXiv:2410.07318; UPR-1332-T; LMU-ASC 16/24; CERN-TH-2024-145.-
2025-01-15 - 89 p.
- Published in : Phys. Rev. D 111 (2025) 026018
Fulltext: PDF;
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2024-09-26
06:53 |
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2024-09-14
04:38 |
Two-loop amplitudes for $\mathcal{O}(\alpha_s^2)$ corrections to $W\gamma\gamma$ production at the LHCTwo-loop amplitudes for $ \mathcal{O}\left({\alpha}_s^2\right) $ corrections to Wγγ production at the LHC
/ Badger, Simon (INFN, Turin) ; Hartanto, Heribertus Bayu (APCTP, Pohang ; POSTECH) ; Wu, Zihao (HIAS, UCAS, Hangzhou) ; Zhang, Yang (Hefei, CUST ; PCFT, Hefei) ; Zoia, Simone (CERN)
We present the two-loop helicity amplitudes contributing to the next-to-next-to-leading order QCD predictions for W-boson production in association with two photons at the Large Hadron Collider. We derived compact analytic expressions for the two-loop amplitudes in the leading colour limit, and provide numerical results for the subleading colour contributions. [...]
arXiv:2409.08146; CERN-TH-2024-146; USTC-ICTS/PCFT-24-29.-
2024-12-30 - 42 p.
- Published in : JHEP 2512 (2025) 221
Fulltext: 2409.08146 - PDF; document - PDF;
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2024-09-12
04:37 |
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