1.
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Two-current correlations in the pion on the lattice
/ Bali, Gunnar S. (Regensburg U. ; TIFR, Mumbai, Dept. Theor. Phys.) ; Bruns, Peter C. (Rez, Nucl. Phys. Inst.) ; Castagnini, Luca (Regensburg U.) ; Diehl, Markus (Hamburg U. ; DESY) ; Gaunt, Jonathan R. (CERN) ; Gläßle, Benjamin (Tubingen U.) ; Schäfer, Andreas (Regensburg U.) ; Sternbeck, André (Jena U.) ; Zimmermann, Christian (Regensburg U.)
We perform a systematic study of the correlation functions of two quark currents in a pion using lattice QCD. We obtain good signals for all but one of the relevant Wick contractions of quark fields. [...]
arXiv:1807.03073; DESY 18-105; CERN-TH-2018-147; DESY-18-105.-
2018-12-11 - 49 p.
- Published in : JHEP 12 (2018) 061
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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2.
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Double parton distributions in the pion from lattice QCD
/ Bali, Gunnar S. (Regensburg U. ; TIFR, Mumbai, Dept. Theor. Phys.) ; Castagnini, Luca (Regensburg U.) ; Diehl, Markus (Hamburg U. ; DESY) ; Gaunt, Jonathan R. (CERN) ; Gläßle, Benjamin (Tubingen U.) ; Schäfer, Andreas (Regensburg U.) ; Zimmermann, Christian (Regensburg U.)
We perform a lattice study of double parton distributions in the pion, using the relationship between their Mellin moments and pion matrix elements of two local currents. A good statistical signal is obtained for almost all relevant Wick contractions. [...]
arXiv:2006.14826; DESY 20-098; DESY-20-098; CERN-TH-2020-086.-
2021-02-08 - 60 p.
- Published in : JHEP 2102 (2021) 067
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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3.
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Sum rule improved double parton distributions in position space
/ Diehl, M. (DESY) ; Gaunt, J.R. (CERN) ; Lang, D.M. (Regensburg U. ; Munich, Tech. U.) ; Plößl, P. (DESY) ; Schäfer, A. (Regensburg U.)
Models for double parton distributions that are realistic and consistent with theoretical constraints are crucial for a reliable description of double parton scattering. We show how an ansatz that has the correct behaviour in the limit of small transverse distance between the partons can be improved step by step, such as to fulfil the sum rules for double parton distributions with an accuracy around 10%..
arXiv:2001.10428; CERN-TH-2020-014; DESY-20-011.-
2020-05-25 - 19 p.
- Published in : Eur. Phys. J. C 80 (2020) 468
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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4.
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$\mathrm{D}$ and $\mathrm{D_s}$ decay constants in $N_{\rm f}=2+1$ QCD with Wilson fermions
/ Kuberski, Simon (CERN ; Mainz U., Inst. Phys. ; Darmstadt, GSI) ; Joswig, Fabian (Edinburgh U.) ; Collins, Sara (Regensburg U.) ; Heitger, Jochen (Munster U., ITP) ; Söldner, Wolfgang (Regensburg U.)
/RQCD Collaboration ; ALPHA Collaboration
We present results for the leptonic decay constants of the D and D$_{\rm s}$ mesons from $N_{\rm f}=2+1$ lattice QCD. We employ a set of 49 high statistics gauge ensembles generated by the Coordinated Lattice Simulations (CLS) effort utilising non-perturbatively improved Wilson fermions and the tree-level Symanzik improved gauge action at six values of the lattice spacing in the range $a = 0.098\,$fm down to $a = 0.039\,$fm, with pion masses varying from around $420\,$MeV down to below the physical point. [...]
arXiv:2405.04506; CERN-TH-2024-052; MITP-24-047; MS-TP-24-09.-
2024-07-10 - 44 p.
- Published in : JHEP 2407 (2024) 090
Fulltext: document - PDF; 2405.04506 - PDF;
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5.
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PDF bias and flavor dependence in TMD distributions
/ Bury, Marcin (Unlisted, PL) ; Hautmann, Francesco (Antwerp U. ; Oxford U. ; CERN) ; Leal-Gomez, Sergio (Vienna U.) ; Scimemi, Ignazio (Madrid U.) ; Vladimirov, Alexey (Regensburg U. ; Madrid U.) ; Zurita, Pia (Regensburg U.)
Transverse momentum dependent (TMD) distributions match collinear parton density functions (PDF) in the limit of small transverse distances, which is accounted for by global extractions of TMD distributions. We study the influence of the collinear PDF value and uncertainties on the determination of unpolarized TMD distributions and the description of Drell-Yan (DY) and Z-boson production measurements at low transverse momenta. [...]
arXiv:2201.07114; UWThPh 2021-29; CERN-TH-2022-126.-
2022-10-18 - 30 p.
- Published in : JHEP 10 (2022) 118
Fulltext: Publication - PDF; 2201.07114 - PDF;
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6.
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Semi-Inclusive Deep Inelastic Scattering in Wandzura-Wilczek-type approximation
/ Bastami, S. (Connecticut U.) ; Avakian, H. (Jefferson Lab) ; Efremov, A.V. (Dubna, JINR) ; Kotzinian, A. (Yerevan Phys. Inst. ; INFN, Turin) ; Musch, B.U. (Regensburg U.) ; Parsamyan, B. (CERN) ; Prokudin, A. (Jefferson Lab ; Penn State U., Berks-Lehigh Valley) ; Schlegel, M. (New Mexico State U.) ; Schnell, G. (Basque U., Bilbao ; IKERBASQUE, Bilbao) ; Schweitzer, P. (Connecticut U. ; Tubingen U.) et al.
We present the complete cross-section for the production of unpolarized hadrons in semi-inclusive deep-inelastic scattering up to power-suppressed ${\cal O}(1/Q^2)$ terms in the Wandzura--Wilczek-type approximation which consists in systematically assuming that $\bar{q}gq$--terms are much smaller than $\bar{q}q$--correlators. We compute all twist-2 and twist-3 structure functions and the corresponding asymmetries, and discuss the applicability of the Wandzura--Wilczek-type approximations on the basis of available data. [...]
arXiv:1807.10606; JLAB-THY-18-2775.-
2019-06-04 - 71 p.
- Published in : EPJ Web Conf.: 204 (2019) , pp. 01013
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; External link: JLab Document Server
In : 24th International Baldin Seminar on High Energy Physics Problems : Relativistic Nuclear Physics and Quantum Chromodynamics, Dubna, Russia, 17 - 22 Sep 2018, pp.01013
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7.
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FLAG Review 2021
/ Flavour Lattice Averaging Group (FLAG) Collaboration
We review lattice results related to pion, kaon, $D$-meson, $B$-meson, and nucleon physics with the aim of making them easily accessible to the nuclear and particle physics communities. More specifically, we report on the determination of the light-quark masses, the form factor $f_+(0)$ arising in the semileptonic $K \to \pi$ transition at zero momentum transfer, as well as the decay constant ratio $f_K/f_\pi$ and its consequences for the CKM matrix elements $V_{us}$ and $V_{ud}$. [...]
arXiv:2111.09849; CERN-TH-2021-191; JLAB-THY-21-3528; FERMILAB-PUB-21-620-SCD-T.-
2022-10-04 - 418 p.
- Published in : Eur. Phys. J. C 82 (2022) 869
Fulltext: fermilab-pub-21-620-scd-t - PDF; 2111.09849 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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8.
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Artificial Intelligence for the Electron Ion Collider (AI4EIC)
/ Allaire, C. (IJCLab, Orsay) ; Ammendola, R. (INFN, Rome2) ; Aschenauer, E.-C. (Brookhaven) ; Balandat, M. (SLAC) ; Battaglieri, M. (INFN, Genoa) ; Bernauer, J. (SUNY, Stony Brook ; Yale U. ; RIKEN BNL) ; Bondì, M. (INFN, Catania) ; Branson, N. (Messiah Coll. ; Drexel U.) ; Britton, T. (Jefferson Lab) ; Butter, A. (LPNHE, Paris) et al.
The Electron-Ion Collider (EIC), a state-of-the-art facility for studying the strong force, is expected to begin commissioning its first experiments in 2028. This is an opportune time for artificial intelligence (AI) to be included from the start at this facility and in all phases that lead up to the experiments. [...]
arXiv:2307.08593; FERMILAB-CONF-23-407-AD.-
2024-02-15 - 27 p.
- Published in : Comput. Softw. Big Sci. 8 (2024) 5
Fulltext: 2307.08593 - PDF; 154e04fa6e7cde7b5961a079c6081ef6 - PDF; Fulltext from Publisher: document - PDF; s41781-024-00113-4 - PDF; External link: Fermilab Library Server
In : Artificial Intelligence for the Electron Ion Collider (AI4EIC), Washington, DC, United States, 28 Nov - 1 Dec 2023, pp.5
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9.
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A Common Tracking Software Project
/ Ai, Xiaocong (DESY) ; Allaire, Corentin (CERN) ; Calace, Noemi (CERN) ; Czirkos, Angéla (Eotvos U.) ; Elsing, Markus (CERN) ; Ene, Irina (UC, Berkeley) ; Farkas, Ralf (Bonn U.) ; Gagnon, Louis-Guillaume (UC, Berkeley) ; Garg, Rocky (Stanford U.) ; Gessinger, Paul (CERN) et al.
The reconstruction of the trajectories of charged particles, or track reconstruction, is a key computational challenge for particle and nuclear physics experiments. While the tuning of track reconstruction algorithms can depend strongly on details of the detector geometry, the algorithms currently in use by experiments share many common features. [...]
arXiv:2106.13593.-
2022-04-13 - 27 p.
- Published in : Comput. Softw. Big Sci. 6 (2022) 8
Fulltext: 2106.13593 - PDF; document - PDF;
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10.
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Flavor dependent $b$-profiles from Drell-Yan spectra at low transverse momenta
/ Bury, M. (Unlisted, PL) ; Hautmann, F. (CERN ; Antwerp U. ; Oxford U. ; U. Antwerp (main) ; U. Oxford (main)) ; Leal-Gomez, S. (Vienna U.) ; Scimemi, I. (Madrid U.) ; Vladimirov, A. (Madrid U. ; Regensburg U.) ; Zurita, P. (Regensburg U.)
We discuss our recent study of the impact of collinear PDFs and their uncertainties on the determination of transverse momentum dependent (TMD) distributions and the description of Drell-Yan (DY) production measurements at low transverse momenta. Using QCD factorization and evolution in transverse coordinate b space, this study takes into account for the first time flavor-dependent non-perturbative b-profiles. [...]
arXiv:2211.05063; CERN-TH-2022-183.-
2022-12-14 - 6 p.
- Published in : PoS: ICHEP2022 (2022) , pp. 834
Fulltext: document - PDF; 2211.05063 - PDF;
In : 41st International Conference on High Energy Physics (ICHEP 2022), Bologna, Italy, 6 - 13 Jul 2022, pp.834
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