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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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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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3.
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Heavy meson hadroproduction: open issues
/ Garzelli, Maria Vittoria (Florence U. ; INFN, Florence) ; Alekhin, Sergey (Hamburg U., Inst. Theor. Phys. II) ; Benzke, Michael (Hamburg U., Inst. Theor. Phys. II) ; Kniehl, Bernd (Hamburg U., Inst. Theor. Phys. II) ; Moch, Sven-Olaf (Hamburg U., Inst. Theor. Phys. II) ; Zenaiev, Oleksandr (CERN)
We discuss open issues in the description of single-inclusive open heavy-meson production in $pp$ and $pA$ collisions, considering different flavour-number schemes. Solving these issues is important for improving the accuracy of PDF fits and of predictions in high-energy astroparticle physics..
SISSA, 2019 - 10 p.
- Published in : PoS RADCOR2019 (2019) 048
Fulltext: PDF;
In : 14th International Symposium on Radiative Corrections : Application of Quantum Field Theory to Phenomenology, Avignon, France, 8 - 13 Sep 2019, pp.048
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4.
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Updated predictions for toponium production at the LHC
/ Garzelli, M.V. (King's Coll. London ; CERN ; Hamburg U., Inst. Theor. Phys. II) ; Limatola, G. (Hamburg U., Inst. Theor. Phys. II ; DESY) ; Moch, S.-O. (Hamburg U., Inst. Theor. Phys. II) ; Steinhauser, M. (KIT, Karlsruhe, TTP) ; Zenaiev, O. (Hamburg U., Inst. Theor. Phys. II)
We provide an update on QCD predictions for top-quark pair production close to threshold including bound state effects at the Large Hadron Collider. [...]
CERN-TH-2024-222 ; DESY 24-207 ; P3H-24-104 ; TTP24-048 ; arXiv:2412.16685.
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High precision fundamental constants at the TeV scale
/ Moch, S. (Hamburg U., Inst. Theor. Phys. II ; DESY, Zeuthen) ; Weinzierl, S. (U. Mainz, PRISMA) ; Alekhin, S. (DESY, Zeuthen ; Serpukhov, IHEP) ; Blumlein, J. (DESY, Zeuthen) ; de la Cruz, L. (UNAM, Mexico) ; Dittmaier, S. (Freiburg U.) ; Dowling, M. (DESY, Zeuthen) ; Erler, J. (U. Mainz, PRISMA ; UNAM, Mexico) ; Espinosa, J.R. (ICREA, Barcelona ; Barcelona, IFAE) ; Fuster, J. (Valencia U., IFIC ; Valencia U.) et al.
This report summarizes the proceedings of the 2014 Mainz Institute for Theoretical Physics (MITP) scientific program on "High precision fundamental constants at the TeV scale". [...]
arXiv:1405.4781 ; DESY-14-081 ; MITP-14-036 ; MITP-14-036.
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2014. - 57 p.
Preprint - Full text
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7.
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New Trends in HERA Physics 2011 Ringberg Workshop - HERA Physics 2011
25 - 28 Sep 2011
- Tegernsee, Germany
/ Grindhammer, Guenter (ed.) (Munich, Max Planck Inst.); Kniehl, Bernd A. (ed.) (Hamburg U., Inst. Theor. Phys. II); Kramer, Gustav (ed.) (Hamburg U., Inst. Theor. Phys. II); Ochs, Wolfgang (ed.) (Munich, Max Planck Inst.)
2012
- Published in : Nucl. Phys. B, Proc. Suppl. 222-224 (2012)
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8.
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Ringberg Workshop: New Trends in HERA Physics 2011
25 - 28 Sep 2011
- Ringberg Castle, Tegernsee, Germany
/ Grindhammer, Guenter (ed.) (Munich, Max Planck Inst.); Kniehl, Bernd A. (ed.) (Hamburg U., Inst. Theor. Phys. II); Kramer, Gustav (ed.) (Hamburg U., Inst. Theor. Phys. II); Ochs, Wolfgang (ed.) (Munich, Max Planck Inst.)
2012
- Published in : Nucl. Phys. B Proc. Suppl.: 222-224 (2012)
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Precision determination of the strong coupling constant within a global PDF analysis
/ Ball, Richard D. (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Carrazza, Stefano (CERN) ; Del Debbio, Luigi (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Forte, Stefano (INFN, Milan ; Milan U.) ; Kassabov, Zahari (Cambridge U.) ; Rojo, Juan (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Slade, Emma (Oxford U., Theor. Phys.) ; Ubiali, Maria (Cambridge U., DAMTP)
/NNPDF Collaboration
We present a determination of the strong coupling constant $\alpha_s(m_Z)$ based on the NNPDF3.1 determination of parton distributions, which for the first time includes constraints from jet production, top-quark pair differential distributions, and the $Z$ $p_T$ distributions using exact NNLO theory. Our result is based on a novel extension of the NNPDF methodology - the correlated replica method - which allows for a simultaneous determination of $\alpha_s$ and the PDFs with all correlations between them fully taken into account. [...]
arXiv:1802.03398; CAVENDISH-HEP-18-02; CERN-TH-2018-024; Edinburgh 2017/19; Nikhef/2017-046; OUTP-17-14P; DAMTP-2018-3; TIF-UNIMI-2018-1; EDINBURGH-2017-19; NIKHEF-2017-046.-
2018-05-24 - 23 p.
- Published in : Eur. Phys. J. C 78 (2018) 408
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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$\alpha_s$(2019) discussions summary
/ Alekhin, Sergey (Hamburg U., Inst. Theor. Phys. II ; Serpukhov, IHEP) ; Barreiro, Fernando (U. Autonoma, Madrid (main)) ; Bethke, Siegfried (Munich, Max Planck Inst.) ; Brambilla, Nora (Munich, Tech. U.) ; Britzger, Daniel (Munich, Max Planck Inst.) ; Brodsky, Stanley J (SLAC) ; Camarda, Stefano (CERN) ; D'Enterria, David (CERN) ; Dalla Brida, Mattia (INFN, Milan Bicocca ; Milan Bicocca U.) ; Golterman, Maarten (San Francisco State U.) et al.
A summary of the main points of discussion raised during the talks and their follow-up questions,as well as in the round table of the last day of the $α_s$ (2019) workshop, is presented. The discussions not only focused on particular issues affecting each one of the individual $α_s$ extractions, but also on the current PDG categorization of $α_s$ measurements and on the methods used to average them into a single $α_s$ ($m_Z$) value. [...]
SISSA, 2019 - 8 p.
- Published in : PoS ALPHAS2019 (2019) 026
Fulltext from publisher: PDF;
In : Workshop on precision measurements of the QCD coupling constant (alphas-2019), Trento, Italy, 11 - 15 Feb 2019, pp.026
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