2025-02-04
04:27 |
From scattering towards multi-hadron weak decays
/ Erben, Felix (CERN)
In this article I provide an overview of the current state of scattering within lattice QCD, along with ongoing projects that examine weak decays involving scattering states as either final or intermediate states. Significant progress has been made in the study of multi-hadron weak decays, opening the door for scattering calculations to make meaningful contributions to flavour physics and further establishing lattice QCD as the key non-perturbative tool for QCD predictions. [...]
arXiv:2501.19302; CERN-TH-2025-031.-
2025-02-01 - 22 p.
- Published in : PoS LATTICE2024 (2025) 016
Fulltext: 2501.19302 - PDF; document - PDF;
In : 41st International Symposium on Lattice Field Theory (Lattice 2024), Liverpool, United Kingdom, 20 Jul - 3 Aug 2024, pp.016
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2025-02-01
04:27 |
Update on two-level sampling for glueball observables in quenched QCD
/ Barca, Lorenzo (NIC, Zeuthen) ; Finkenrath, Jacob (CERN) ; Knechtli, Francesco (Wuppertal U.) ; Peardon, Michael J. (Trinity Coll., Dublin) ; Schaefer, Stefan (NIC, Zeuthen) ; Urrea-Niño, Juan Andrés (Wuppertal U.)
We report our progress in combining a two-level sampling algorithm with distillation techniques for calculations of disconnected diagrams in quenched QCD. The simulations are performed on a single ensemble at $\beta=6.0$ and volume $V=16^3\times 64$, and at a pion mass of $m_\pi\approx 760~\mathrm{MeV}$..
arXiv:2501.17988; DESY-25-014; CERN-TH-2025-025.-
2025-01-29 - 10 p.
- Published in : PoS LATTICE2024 (2025) 062
Fulltext: 2501.17988 - PDF; document - PDF;
In : 41st International Symposium on Lattice Field Theory (Lattice 2024), Liverpool, United Kingdom, 20 Jul - 3 Aug 2024, pp.062
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2025-01-31
05:09 |
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2025-01-31
05:02 |
Is gauge mediation in the swampland?
/ Dalianis, Ioannis (Athens U.) ; Farakos, Fotis (Padua U. ; INFN, Padua) ; Kehagias, Alex (Natl. Tech. U., Athens)
We note that the typical gauge mediation of supersymmetry breaking is in tension with the global limit of the festina lente swampland bound. The alternatives are mediation/breaking schemes that decouple together with gravity, as for example gravity mediation, for which we highlight some basic phenomenological properties. [...]
arXiv:2305.17089; CERN-TH-2023-106.-
2023-07-13 - 7 p.
Fulltext: PDF;
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2025-01-31
04:33 |
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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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2024-12-04
05:09 |
Constraints on the Pre-Big Bang scenario from a cosmological interpretation of the NANOGrav data
/ Conzinu, P. (INFN, Parma ; U. Parma (main)) ; Fanizza, G. (U. Lisbon (main)) ; Gasperini, M. (INFN, Bari ; U. Bari (main)) ; Pavone, E. (INFN, Bari ; U. Bari (main)) ; Tedesco, L. (INFN, Bari ; U. Bari (main)) ; Veneziano, G. (CERN ; College de France)
We discuss a recently proposed fit of the 15-year data set obtained from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) in terms of a relic stochastic background of primordial gravitons, produced in the context of the string cosmology pre-big bang scenario. We show that such interpretation cannot be reconciled with a phenomenologically viable minimal version of such scenario, while it can be allowed if one considers an equally viable but generalised, non-minimal version of pre-big bang evolution. [...]
arXiv:2412.01734; CERN-TH-2024-210; BA-TH/809-24.-
2025-02-18 - 19 p.
- Published in : JCAP 2502 (2025) 039
Fulltext: 2412.01734 - PDF; document - PDF;
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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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