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1.
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Differential N$^3$LO QCD corrections to charged current production at the LHC
/ Chen, Xuan (KIT, Karlsruhe) ; Gehrmann, Thomas (Zurich U.) ; Glover, Nigel (Durham U., IPPP) ; Huss, Alexander (CERN) ; Yang, Tong-Zhi (Zurich U.) ; Zhu, Hua Xing (Zhejiang U., Inst. Mod. Phys.)
Charged current Drell-Yan production at hadron colliders is a benchmark electroweak process. A recent measurement of the W boson mass by the CDF experiment displays a large deviation from the Standard Model prediction. [...]
arXiv:2207.08584.-
2022-10-20 - 11 p.
- Published in : PoS LL2022 (2022) 004
Fulltext: document - PDF; 2207.08584 - PDF;
In : 16th DESY Workshop on Elementary Particle Physics: Loops and Legs in Quantum Field Theory 2022, Ettal, Germany, 25 - 30 Apr 2022, pp.004
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2.
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Theory uncertainties in the fiducial Drell-Yan cross section and distributions
/ Chen, Xuan (KIT, Karlsruhe, TP ; KIT, Karlsruhe, IAP) ; Gehrmann, Thomas (Zurich U.) ; Glover, Nigel (Durham U., IPPP) ; Huss, Alexander (CERN) ; Monni, Pier Francesco (CERN) ; Re, Emanuele (Milan Bicocca U. ; INFN, Milan Bicocca ; Annecy, LAPTH) ; Rottoli, Luca (Zurich U.) ; Torrielli, Paolo (INFN, Turin ; Turin U.)
In these proceedings we study various sources of theoretical uncertainty in the Drell-Yan $p_T^{{\ell\ell}}$ spectrum focussing on the $p_T^{{\ell\ell}} \lesssim 100\, {\rm GeV}$ region. [...]
arXiv:2206.11059.
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6 p.
Fulltext
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3.
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Transverse Mass Distribution and Charge Asymmetry in W Boson Production to Third Order in QCD
/ Chen, Xuan (KIT, Karlsruhe, TP ; KIT, Karlsruhe, IKP) ; Gehrmann, Thomas (Zurich U.) ; Glover, Nigel (Durham U., IPPP) ; Huss, Alexander (CERN) ; Yang, Tong-Zhi (Zurich U.) ; Zhu, Hua Xing (Zhejiang U., Inst. Mod. Phys.)
Charged gauge boson production at hadron colliders is a fundamental benchmark for the extraction of electroweak parameters and the understanding of the proton structure. To enable precision phenomenology for this process, we compute the third-order (N$^3$LO) QCD corrections to the rapidity distribution and charge asymmetry in W boson production and to the transverse mass distribution of its decay products. [...]
arXiv:2205.11426; IPPP/22/32; ZU-TH 19/22; P3H-22-055; KA-TP-15-2022; CERN-TH-2022-083.-
2023-03-28 - 6 p.
- Published in : Phys. Lett. B 840 (2023) 137876
Fulltext: 2205.11426 - PDF; Publication - PDF;
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4.
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Dilepton Rapidity Distribution in Drell-Yan Production to Third Order in QCD
/ Chen, Xuan (Zurich U. ; KIT, Karlsruhe, IAP ; KIT, Karlsruhe, TP) ; Gehrmann, Thomas (Zurich U.) ; Glover, Nigel (Durham U., IPPP) ; Huss, Alexander (CERN) ; Yang, Tong-Zhi (Zurich U.) ; Zhu, Hua Xing (Zhejiang U., Inst. Mod. Phys.)
We compute for the first time the lepton-pair rapidity distribution in the photon-mediated Drell-Yan process to next-to-next-to-next-to-leading order (N$^3$LO) in QCD. The calculation is based on the qT-subtraction method, suitably extended to this order for quark-antiquark initiated Born processes. [...]
arXiv:2107.09085; KA-TP-17-2021; ZU-TH 33/21; CERN-TH-2021-110; IPPP/21/13.-
2022-02-03 - 7 p.
- Published in : Phys. Rev. Lett. 128 (2022) 052001
Fulltext: Fulltext - PDF; 2107.09085 - PDF;
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5.
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Scale and isolation sensitivity of diphoton distributions at the LHC
/ Gehrmann, Thomas (Zurich U.) ; Glover, Nigel (Durham U., IPPP) ; Huss, Alexander (Durham U., IPPP ; CERN) ; Whitehead, James (Durham U., IPPP)
Precision measurements of diphoton distributions at the LHC display some tension with theory predictions, obtained at next-to-next-to-leading order (NNLO) in QCD. We revisit the theoretical uncertainties arising from the approximation of the experimental photon isolation by smooth-cone isolation, and from the choice of functional form for the renormalisation and factorisation scales. [...]
arXiv:2009.11310; IPPP/20/42; ZU-TH 17/20; CERN-TH-2020-160; CERN-TH-2020-160.-
2021-01-19 - 35 p.
- Published in : JHEP 2101 (2021) 108
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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6.
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Phenomenology of NNLO jet production at the LHC and its impact on parton distributions
/ Abdul Khalek, Rabah (Vrije U., Amsterdam ; Nikhef, Amsterdam) ; Forte, Stefano (INFN, Milan ; Milan U.) ; Gehrmann, Thomas (Zurich U.) ; Gehrmann-De Ridder, Aude (Zurich U. ; Zurich, ETH) ; Giani, Tommaso (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Glover, Nigel (Durham U., IPPP) ; Huss, Alexander (Durham U., IPPP ; CERN) ; Nocera, Emanuele R. (Nikhef, Amsterdam) ; Pires, Joao (CMAF, Lisbon) ; Rojo, Juan (Vrije U., Amsterdam ; Nikhef, Amsterdam) et al.
We present a systematic investigation of jet production at hadron colliders from a phenomenological point of view, with the dual aim of providing a validation of theoretical calculations and guidance to future determinations of parton distributions (PDFs). We account for all available inclusive jet and dijet production measurements from ATLAS and CMS at 7 and 8 TeV by including them in a global PDF determination, and comparing to theoretical predictions at NNLO QCD supplemented by electroweak (EW) corrections. [...]
arXiv:2005.11327; CERN-TH-2020-073; IPPP/20/17; Nikhef/2020-001; TIF-UNIMI-2020-3; ZU-TH 15/20; TIF-UNIMI-2020-3,
ZU-TH 15/20.-
2020-08-31 - 34 p.
- Published in : Eur. Phys. J. C 80 (2020) 797
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Fulltext from Publisher: PDF;
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7.
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Precise predictions for boosted Higgs production
/ Becker, Kathrin (Freiburg U.) ; Caola, Fabrizio (Oxford U., Theor. Phys.) ; Massironi, Andrea (CERN ; INFN, Milan Bicocca) ; Mistlberger, Bernhard (MIT) ; Monni, Pier Francesco (CERN) ; Chen, Xuan (Zurich U.) ; Frixione, Stefano (INFN, Genoa) ; Gehrmann, Thomas (Zurich U.) ; Glover, Nigel (Durham U., IPPP) ; Hamilton, Keith (University Coll. London) et al.
Inclusive Higgs boson production at large transverse momentum is induced by different production channels. We focus on the leading production through gluon fusion, and perform a consistent combination of the state of the art calculations obtained in the infinite-top-mass effective theory at next-to-next-to-leading order (NNLO) and in the full Standard Model (SM) at next-to-leading order (NLO). [...]
arXiv:2005.07762; CERN-TH-2020-074.-
2024-01-04 - 17 p.
- Published in : SciPost Phys. Core 7 (2024) 001
Fulltext: 2005.07762 - PDF; document - PDF; Publication - PDF;
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8.
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NNLO QCD Corrections for Higgs-plus-jet Production in the Four-lepton Decay Mode
/ Chen, Xuan (Zurich U.) ; Gehrmann, Thomas (Zurich U.) ; Glover, Nigel (Durham U.) ; Huss, Alexander (CERN)
We present the computation of Higgs boson production in association with a jet at the LHC including QCD corrections up to NNLO. The calculation includes the subsequent decay of the Higgs boson into four leptons, allowing for the full reconstruction of the final-state kinematics. [...]
arXiv:1912.03560.-
SISSA, 2019-12-07 - 9 p.
- Published in : PoS RADCOR2019 (2019) 003
Fulltext: 1912.03560 - PDF; 351c8c3419a4e4f3e9ca4362d77ba532 - PDF; PoS(RADCOR2019)003 - PDF;
In : 14th International Symposium on Radiative Corrections : Application of Quantum Field Theory to Phenomenology, Avignon, France, 8 - 13 Sep 2019, pp.003
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9.
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The transverse momentum spectrum of weak gauge bosons at N$^3$LL$+$NNLO
/ Bizon, Wojciech (KIT, Karlsruhe, TTP ; KIT, Karlsruhe, IKP) ; Gehrmann-De Ridder, Aude (Zurich, ETH ; Zurich U.) ; Gehrmann, Thomas (Zurich U.) ; Glover, Nigel (Durham U., IPPP) ; Huss, Alexander (CERN) ; Monni, Pier Francesco (CERN) ; Re, Emanuele (CERN ; Annecy, LAPTH) ; Rottoli, Luca (Milan Bicocca U. ; INFN, Milan Bicocca) ; Walker, Duncan M. (Durham U., IPPP)
We present accurate QCD predictions for the transverse momentum pT spectrum of electroweak gauge bosons at the LHC for 13 TeV collisions, based on a consistent combination of a NNLO calculation at large pT and N3LL resummation in the small pT limit. The inclusion of higher order corrections leads to substantial changes in the shape of the differential distributions, and the residual perturbative uncertainties are reduced to the few percent level across the whole transverse momentum spectrum. [...]
arXiv:1905.05171; ZU-TH 21/1; CERN-TH-2019-050; LAPTH-026/19; IPPP/19/38.-
2019-10-22 - 10 p.
- Published in : Eur. Phys. J. C 79 (2019) 868
Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF;
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10.
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Isolated photon and photon+jet production at NNLO QCD accuracy
/ Chen, Xuan (Zurich U.) ; Gehrmann, Thomas (Zurich U.) ; Glover, Nigel (Durham U., IPPP) ; Höfer, Marius (Zurich U.) ; Huss, Alexander (CERN)
We describe the calculation of the next-to-next-to-leading order (NNLO) QCD corrections to isolated photon and photon-plus-jet production, and discuss how the experimental hadron-level photon definition and isolation criteria can be approximated in the theoretical parton-level calculation. The NNLO corrections lead to a considerable reduction of the theory uncertainty on the predictions, typically to less than five per cent, and enable an improved description of experimental measurements from ATLAS and CMS..
arXiv:1904.01044; IPPP-19-23; ZU-TH-13-19; IPPP/19/23; ZU-TH 13/19; CERN-TH-2019-034.-
2020-04-24 - 30 p.
- Published in : JHEP 2020 (2020) 166
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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