Top Physics Group

• Contact Info
• Relevant studies in top group

Contact Info

e-group: FCC-PED-PhysicsGroup-Top@cern.ch

mattermost: https://mattermost.web.cern.ch/signup_user_complete/?id=pkx3zdzc4pbj3yb4qeibiyr6rc&md=link&sbr=su

Conveners:

Gauthier Durieux (gauthier.durieux@uclouvain.be)
Christian Schwanenberger (christian.schwanenberger@cern.ch)
Juergen Reuter (juergen.reuter@cern.ch)
Xunwu Zuo (xunwu.zuo@cern.ch)

Relevant studies in top group

Legend (status): 🟢 available · 🔵 ongoing · 🟡 to start · 🟣 idle / paused / to resume · ⚪ unspecified

status	Title	contact	material	other refs	physics goal	publication plan
🟢 available	top threshold scan: mass, width, Yukawa, alphaS	Matteo Defranchis	https://arxiv.org/abs/2503.18713	https://cds.cern.ch/record/2651294/files/CERN-ACC-2018-0056.pdf#page=73	measure top mass, width, yukawa, alpha_s from threshold scan
🟡 to start	mass extraction from top decays
🔵 ongoing	top threshold: simulation improvements	Juergen Reuter
🟡 to start	top threshold: scan/run optimisation
🟡 to start	top threshold: mass+width vs. SMEFT interplay			EPJC 79 (2019) 474, JHEP 02 (2018) 125
🟡 to start	spin entanglement: more refined projections?			https://arxiv.org/abs/2404.08049 https://arxiv.org/abs/2601.09558 https://arxiv.org/abs/2602.02719 https://arxiv.org/abs/2604.16268 https://arxiv.org/abs/2604.21332
🟡 to start	spin measurements, ³S¹ toponium, heavy resonances	Christian Schwanenberger		https://arxiv.org/abs/2511.01994 https://arxiv.org/abs/2506.14552 https://arxiv.org/abs/2511.01994
🟡 to start	ttbar continuum precision simulation (NNLO, QCD, EW, off-shell effects,…)		NNLO QCD, also for AFB	Martin Beneke, Andreas Maier, Thomas Rauh, Pedro Ruiz-Femenia https://arxiv.org/abs/1711.10429 (NNLO QCD + NNLO EW bwbw)
🟡 to start	ttbar continuum run optimisation
🟣 Vts done/idle/to resume	Vts and Vtb from t->Ws/Wb	Xunwu Zuo	https://doi.org/10.17181/1hcpd-hfx74	strange tagging in https://arxiv.org/abs/2003.09517	measure Vts and Vtb	paper, including Vtb, hopefully within 2026
🔵 ongoing	top SMEFT interactions (shift in SM EW couplings, dipole moments, and four-fermion operators)	Jacopo De Piccoli, Gauthier Durieux, Sergio Sanchez Cruz, Michele Selvaggi	https://indico.cern.ch/event/1588696/timetable/#24-top-ewk-couplings	Patrick Janot https://arxiv.org/abs/1503.01325 Gauthier Durieux, Martín Perelló, Marcel Vos, Cen Zhang https://arxiv.org/abs/1807.02121 Snowmass 2022 https://arxiv.org/abs/2205.02140	top EFT constraints
🟡 to start	CP-odd top SMEFT interactions			included in https://arxiv.org/abs/1807.02121 linked above
🟡 to start	CP-odd Yukawa coupling from the threshold?
🟣 idle	top FCNC production (and decay)	Hamzeh Khanpour, Mojtaba Mohammadi Najafabadi, Seddigheh Tizchang, with P. Azzi and E. Perez, and D. d’Enterria	https://indico.cern.ch/event/1299294/#17-top-flavor-changing-neutral	Liaoshan Shi, Cen Zhang (CEPC) https://arxiv.org/abs/1906.04573 ILC https://arxiv.org/pdf/2203.07622#page=212 CLIC https://arxiv.org/pdf/1812.02093#page=74 HL-LHC https://arxiv.org/pdf/1812.07638#page=155 FCC-hh https://cds.cern.ch/record/2651294/files/CERN-ACC-2018-0056.pdf#page=78	FCNC coupling constraints
🟢 available	untagged exotic top decays	Barbara Mele, Dibyashree Sengupta, Gennaro Corcella	https://arxiv.org/abs/2508.06954
🟢 available	FCNC top decays in RS models	Sagar Airen, Roberto Franceschini	https://arxiv.org/abs/2601.14966
🟢 available	2-loop RGE sensitivity to top Yukawa operator from EW precision	Lukas Born, Admir Greljo, Anders Eller Thomsen	https://arxiv.org/abs/2604.26817
🟢 available	1-loop-squared RGE sensitivity to four-top operator from EW precision	Ben Stefanek	https://arxiv.org/abs/2407.09593
🟢 available	impact of eett operators on Higgs processes	Luigi Bellafronte, Sally Dawson, Pier Paolo Giardino, Hongkai Liu	https://arxiv.org/abs/2507.02039
🟢 available	impact of eett operators on Higgs self coupling extraction	Lukas Allwicher, Christophe Grojean, Lucine Tabatt	https://arxiv.org/abs/2512.06916