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1.
Theoretical developments in the SMEFT at dimension-8 and beyond / Alioli, Simone (INFN, Milan Bicocca) ; Boughezal, Radja (Argonne) ; Cao, Weiguang (Tokyo U., IPMU ; Tokyo U.) ; Chala, Mikael (Granada U., Theor. Phys. Astrophys.) ; Díaz-Carmona, Álvaro (Granada U., Theor. Phys. Astrophys.) ; Bakshi, Supratim Das (Granada U., Theor. Phys. Astrophys.) ; Durieux, Gauthier (CERN) ; Gráf, Lukáš (UC, Berkeley ; UC, San Diego) ; Guedes, Guilherme (Granada U., Theor. Phys. Astrophys.) ; Henning, Brian Quinn (EPFL, Lausanne, LPTP) et al.
In this contribution to the Snowmass 2021 process we review theoretical developments in the Standard Model Effective Field Theory (SMEFT) with a focus on effects at the dimension-8 level and beyond. [...]
arXiv:2203.06771.
- 37.
eConf - Fulltext
2.
LHC limits on axion-like particles from heavy-ion collisions / Knapen, Simon (LBL, Berkeley ; UC, Berkeley) ; Lin, Tongyan (UC, San Diego ; LBL, Berkeley ; UC, Berkeley) ; Lou, Hou Keong (LBL, Berkeley ; UC, Berkeley) ; Melia, Tom (Tokyo U., IPMU ; LBL, Berkeley ; UC, Berkeley)
In these proceedings we use recent LHC heavy-ion data to set a limit on axion-like particles coupling to electromagnetism with mass in the range 10-100 GeV. We recast ATLAS data as per the strategy proposed in 1607.06083, and find results in-line with the projections given there..
arXiv:1709.07110.- 2018-12-20 - 4 p. - Published in : CERN Conf. Proc. 1 (2018) 65 Fulltext: fulltext1624686 - PDF; 557-3760-1-PB - PDF; Preprint: PDF;
In : Proceedings of the PHOTON-2017 Conference, pp.65
3.
US Cosmic Visions: New Ideas in Dark Matter 2017: Community Report / Battaglieri, Marco (INFN, Genoa) ; Belloni, Alberto (Maryland U.) ; Chou, Aaron (Fermilab) ; Cushman, Priscilla (Minnesota U.) ; Echenard, Bertrand (Caltech) ; Essig, Rouven (SUNY, Stony Brook) ; Estrada, Juan (Fermilab) ; Feng, Jonathan L. (UC, Irvine) ; Flaugher, Brenna (Fermilab) ; Fox, Patrick J. (Fermilab) et al.
This white paper summarizes the workshop "U.S. [...]
arXiv:1707.04591 ; FERMILAB-CONF-17-282-AE-PPD-T.
- 2017 - 113.
Fermilab Library Server (fulltext available) - Symmetry Magazine article - Full text - Fulltext
4.
Exclusive hadronic $W$ decay: $W \to \pi \gamma$ and $W \to \pi^+ \pi^+ \pi^-$ / Melia, Tom (CERN)
In this talk I will present results which assess the possibility of the LHC observing the decays W→πγ and W→π+π+π− . No exclusive hadronic decay of a fundamental standard model boson has ever been observed before and, at the LHC, the huge QCD background and trigger challenges present serious difficulties in making such measurements. [...]
2016 - 5 p. - Published in : Nucl. Part. Phys. Proc. 273-275 (2016) 2102-2106 Fulltext: PDF;
In : 37th International Conference on High Energy Physics, Valencia, Spain, 2 - 9 Jul 2014, pp.2102-2106
5.
Merging WW and WW+jet with MINLO / Hamilton, Keith (University Coll. London) ; Melia, Tom (UC, Berkeley (main) ; LBNL, Berkeley) ; Monni, Pier Francesco (Oxford U., Theor. Phys.) ; Re, Emanuele (Annecy, LAPTH) ; Zanderighi, Giulia (Oxford U., Theor. Phys. ; CERN)
We present a simulation program for the production of a pair of W bosons in association with a jet, that can be used in conjunction with general-purpose shower Monte Carlo generators, according to the POWHEG method. We have further adapted and implemented the MINLO' method on top of the NLO calculation underlying our WW+jet generator. [...]
arXiv:1606.07062; CERN-TH-2016-146; LAPTH-031-16; OUTP-16-17P; CERN-TH-2016-146; LAPTH-031-16; OUTP-16-17P.- 2016-09-12 - 23 p. - Published in : JHEP 09 (2016) 057 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
6.
Rare exclusive hadronic W decays in a $t\bar{t}$ environment / Mangano, Michelangelo (CERN) ; Melia, Tom (CERN)
The large cross section for t-tbar production at the LHC and at any future hadron collider provides a high-statistics and relatively clean environment for a study of W boson properties: after tagging on a leptonic decay of one of the Ws and the two b-jets, an additional W still remains in the event. We study the prospect of making the first exclusive hadronic decay of a fundamental boson of the standard model, using the decay modes W to pi gamma and W to pi pi pi, and other related decays. [...]
arXiv:1410.7475.- 2015-06-11 - 9 p. - Published in : Eur. Phys. J. C 75 (2015) 258 Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF;
7.
Getting more flavour out of one-flavour QCD / Melia, Tom (CERN)
We argue that no notion of flavour is necessary when performing amplitude calculations in perturbative QCD with massless quarks. We show this explicitly at tree-level, using a flavour recursion relation to obtain multi-flavoured QCD from one-flavour QCD. [...]
arXiv:1312.0599; CERN-PH-TH-2013-290; TH-2013-290.- 2014 - 27 p. - Published in : Phys. Rev. D 89 (2014) 074012 APS published version, local copy: PDF; External link: Preprint
8.
Dyck Words and Multi-Quark Primitive Amplitudes / Melia, Tom (CERN)
I study group theory (Kleiss-Kuijf) relations between purely multi-quark primitive amplitudes at tree level, and prove that they reduce the number of independent primitives to (n-2)!/(n/2)!, where n is the number of quarks plus antiquarks, in the case where quark lines have different flavours. I give an explicit example of an independent basis of primitives for any n which is of the form A(1,2,sigma), where sigma is a permutation based on a Dyck word..
arXiv:1304.7809; CERN-PH-TH-2013-088; CERN-PH-TH-2013-088.- 2013-07-15 - 8 p. - Published in : Phys. Rev. D 88 (2013) 014020 APS published version, local copy: PDF; Fulltext: PDF; External link: Preprint

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