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Novel tools and observables for jet physics in heavy-ion collisions
/ Andrews, Harry Arthur (Birmingham U.) ; d'Enterria, David (CERN) ; Apolinario, Liliana (CMAF, Lisbon ; Lisbon, IST) ; Bertens, Redmer Alexander (Tennessee U.) ; Bierlich, Christian (Lund U. ; Bohr Inst.) ; Cacciari, Matteo (Diderot U., Paris ; Paris, LPTHE) ; Chen, Yi (CERN) ; Chien, Yang-Ting (MIT, Cambridge, CTP) ; Mendez, Leticia Cunqueiro (Oak Ridge ; Tennessee U.) ; Deak, Michal (Cracow, INP) et al.
Studies of fully-reconstructed jets in heavy-ion collisions aim at extracting thermodynamical and transport properties of hot and dense QCD matter. Recently, a plethora of new jet substructure observables have been theoretically and experimentally developed that provide novel precise insights on the modifications of the parton radiation pattern induced by a QCD medium. [...]
arXiv:1808.03689; CERN-TH-2018-186; LU-TP 18-14; IFJPAN-IV-2018-8; MCNET-18-19.-
2020-04-29 - 29 p.
- Published in : J. Phys. G 47 (2020) 065102
Fulltext: PDF; Fulltext from Publisher: PDF;
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Small-radius jets to all orders
/ Cacciari, Matteo (Diderot U., Paris ; Paris, LPTHE) ; Dreyer, Frederic (Paris, LPTHE ; UPMC, Paris (main)) ; Soyez, Gregory (IPhT, Saclay) ; Salam, Gavin (CERN) ; Dasgupta, Mrinal (Manchester U.)
With hadron colliders continuing to push the boundaries of precision, it is becoming increas ingly important to have a detailed understanding of the subtleties appearing at smaller values of the jet radius R. We present a method to resum all leading logarithmic terms, a'.; Inn R, using a generating functional approach, as was recently discussed in Ref. [...]
2015 - 5 p.
- Published in : , pp. 169
Fulltext: PDF;
In : 50th Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 21 - 28 Mar 2015, pp.169
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A note on the fate of the Landau–Yang theorem in non-Abelian gauge theories
/ Cacciari, Matteo (CERN ; Diderot U., Paris ; Paris, LPTHE ; UPMC, Paris (main)) ; Del Debbio, Luigi (CERN ; U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Espinosa, José R. (Barcelona, IFAE ; ICREA, Barcelona) ; Polosa, Antonio D. (INFN, Rome ; Rome U.) ; Testa, Massimo (INFN, Rome ; Rome U.)
Using elementary considerations of Lorentz invariance, Bose symmetry and BRST invariance, we argue why the decay of a massive color-octet vector state into a pair of on-shell massless gluons is possible in a non-Abelian SU(N) Yang-Mills theory, we constrain the form of the amplitude of the process and offer a simple understanding of these results in terms of effective-action operators..
arXiv:1509.07853; CERN-PH-TH-2015-173; CERN-PH-TH-2015-173.-
Geneva : CERN, 2016-02-10 - 6 p.
- Published in : Phys. Lett. B 753 (2016) 476-481
Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; External link: Preprint
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Gluon PDF constraints from the ratio of forward heavy quark production at the LHC at $\sqrt{S}$ = 7 and 13 TeV
/ Cacciari, Matteo (CERN ; Diderot U., Paris ; Paris, LPTHE ; UPMC, Paris (main)) ; Mangano, Michelangelo L. (CERN) ; Nason, Paolo (INFN, Milan Bicocca)
We discuss production of charm and bottom quarks at forward rapidity in pp collisions at the LHC, updating the QCD predictions for the run at $\sqrt{S}$ = 13 TeV. We show that, while the absolute rates suffer from large theoretical systematics, dominated by scale uncertainties, the increase relative to the rates precisely measured at 7 TeV can be predicted with an accuracy of a few percent, sufficient to highlight the sensitivity to the gluon distribution function..
arXiv:1507.06197; CERN-PH-TH-2015-171; CERN-PH-TH-2015-171.-
Geneva : CERN, 2015-12-22 - 21 p.
- Published in : Eur. Phys. J. C 75 (2015) 610
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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Fully differential VBF Higgs production at NNLO
/ Cacciari, Matteo (Diderot U., Paris ; Paris, LPTHE ; CERN) ; Dreyer, Frédéric A. (Paris, LPTHE ; CERN) ; Karlberg, Alexander (Oxford U., Theor. Phys.) ; Salam, Gavin P. (CERN) ; Zanderighi, Giulia (CERN ; Oxford U., Theor. Phys.)
We calculate the fully differential next-to-next-to-leading-order (NNLO) corrections to vector-boson fusion (VBF) Higgs production at proton colliders, in the limit in which there is no cross-talk between the hadronic systems associated with the two protons. We achieve this using a new "projection-to-Born" method that combines an inclusive NNLO calculation in the structure-function approach and a suitably factorised next-to-leading-order (NLO) VBF Higgs plus 3-jet calculation, using appropriate Higgs plus 2-parton counter events. [...]
CERN-PH-TH-2015-127; OUTP-15-12P; arXiv:1506.02660; CERN-PH-TH-2015-127.-
Geneva : CERN, 2015-08-21 - 5 p.
APS Open Access article: PDF; Preprint: PDF; External link: Preprint
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SoftKiller, a particle-level pileup removal method
/ Cacciari, Matteo (Diderot U., Paris ; UPMC, Paris (main) ; Paris, LPTHE) ; Salam, Gavin P. (CERN) ; Soyez, Gregory (IPhT, Saclay)
Existing widely-used pileup removal approaches correct the momenta of individual jets. In this article we introduce an event-level, particle-based pileup correction procedure, SoftKiller. [...]
arXiv:1407.0408; CERN-PH-TH-2014-116; CERN-PH-TH-2014-116.-
2015-02-06 - 16 p.
- Published in : Eur. Phys. J. C 75 (2015) 59
Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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On the use of charged-track information to subtract neutral pileup
/ Cacciari, Matteo (Diderot U., Paris ; Paris, LPTHE ; Paris U., IV) ; Salam, Gavin P. (CERN) ; Soyez, Gregory (IPhT, Saclay)
The use of charged pileup tracks in a jet to predict the neutral pileup component in that same jet could potentially lead to improved pileup removal techniques, provided there is a strong local correlation between charged and neutral pileup. In Monte Carlo simulation we find that the correlation is however moderate, a feature that we attribute to characteristics of the underlying non-perturbative dynamics. [...]
arXiv:1404.7353; CERN-PH-TH-2014-052; CERN-PH-TH-2014-052.-
2015-07-06 - 18 p.
- Published in : Phys. Rev. D 92 (2015) 014003
APS Open Access article: PDF; Fulltext: PDF; External link: Preprint
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Pileup subtraction for jet shapes
/ Soyez, Gregory (Saclay, SPhT) ; Salam, Gavin P. (CERN ; Princeton U. ; Paris, LPTHE) ; Kim, Jihun (Saclay, SPhT) ; Dutta, Souvik (Indian Inst. Tech., Mumbai) ; Cacciari, Matteo (Paris, LPTHE ; Diderot U., Paris)
Jet shapes have the potential to play a role in many LHC analyses, for example in quark-gluon discrimination or jet substructure analyses for hadronic decays of boosted heavy objects. Most shapes, however, are significantly affected by pileup. [...]
arXiv:1211.2811; CERN-PH-TH-2012-300.-
2013 - 5 p.
- Published in : Phys. Rev. Lett. 110 (2013) 162001
APS Published version, local copy: PDF; Fulltext: PDF; External link: Preprint
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