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1.
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NNLO Photon Production with Realistic Photon Isolation
/ Schuermann, Robin (Zurich U.) ; Chen, Xuan (Karlsruhe U., ITP ; KIT, Karlsruhe, IAP) ; Gehrmann, Thomas (Zurich U.) ; Glover, E.W.N. (Durham U., IPPP) ; Höfer, Marius (Munich U., ASC) ; Huss, Alexander (CERN)
Isolated photon production at hadron colliders proceeds via direct production and fragmentation processes. Theory predictions for the isolated photon and photon-plus-jet cross section often impose idealised photon isolation criteria, eliminating the fragmentation contribution and introducing a systematic uncertainty in the comparison to data. [...]
arXiv:2208.02669.-
2022-10-20 - 11 p.
- Published in : PoS LL2022 (2022) 034
Fulltext: Publication - PDF; 2208.02669 - PDF;
In : 16th DESY Workshop on Elementary Particle Physics: Loops and Legs in Quantum Field Theory 2022, Ettal, Germany, 25 - 30 Apr 2022, pp.034
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2.
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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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3.
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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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4.
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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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5.
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Automation of antenna subtraction in colour space: gluonic processes
/ Chen, Xuan (KIT, Karlsruhe ; KIT, Karlsruhe, IKP) ; Gehrmann, Thomas (Zurich U.) ; Glover, E.W. N. (Durham U., IPPP) ; Huss, Alexander (CERN) ; Marcoli, Matteo (Zurich U.)
We present the colourful antenna subtraction method, a reformulation of the antenna subtraction scheme for next-to-next-to-leading order (NNLO) calculations in QCD. The aim of this new approach is to achieve a general and process-independent construction of the subtraction infrastructure at NNLO. [...]
arXiv:2203.13531; CERN-TH-2022-047; IPPP/22/15; KA-TP-05-2022; P3H-22-030; ZU-TH 10/22.-
2022-10-14 - 55 p.
- Published in : JHEP 2210 (2022) 099
Fulltext: document - PDF; 2203.13531 - PDF;
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6.
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Third-Order Fiducial Predictions for Drell-Yan Production at the LHC
/ Chen, Xuan (KIT, Karlsruhe ; KIT, Karlsruhe, IKP) ; Gehrmann, Thomas (Zurich U.) ; Glover, E.W.N. (Durham U., IPPP) ; Huss, Alexander (CERN) ; Monni, Pier Francesco (CERN) ; Re, Emanuele (INFN, Milan Bicocca ; Milan Bicocca U. ; Annecy, LAPTH) ; Rottoli, Luca (Zurich U.) ; Torrielli, Paolo (Turin U. ; INFN, Turin)
The Drell-Yan process at hadron colliders is a fundamental benchmark for the study of strong interactions and the extraction of electro-weak parameters. The outstanding precision of the LHC demands very accurate theoretical predictions with a full account of fiducial experimental cuts. [...]
arXiv:2203.01565; CERN-TH-2022-023; IPPP/22/08; LAPTH-009/22; KA-TP-03-2022,
P3H-22-022; ZU-TH 07/22.-
2022-06-21 - 9 p.
- Published in : Phys. Rev. Lett. 128 (2022) 252001
Fulltext: 2203.01565 - PDF; PhysRevLett.128.252001 - PDF;
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7.
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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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8.
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9.
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Second order QCD corrections to the g+g → H +H four-point amplitude
/ Banerjee, Pulak ; Borowka, Sophia ; Dhani, Prasanna ; Gehrmann, Thomas ; Ravindran, Vajravelu
In this contribution we compute the two loop massless QCD corrections to the four-point ampli- tude g + g → H + H . We work in the effective theory where the Higgs boson interact with gluons in the infinite top quark mass limit. [...]
CERN-TH-2020-194.-
Geneva : CERN, 2019 - 10.
- Published in : PoS RADCOR2019 (2019) 011
Fulltext: PDF;
In : 14th International Symposium on Radiative Corrections : Application of Quantum Field Theory to Phenomenology, Avignon, France, 8 - 13 Sep 2019, pp.011
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10.
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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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