number	topic	authors	status	# pages	communication	emails of authors
1	ttH main section (NLO+PS)	MG5_aMC@NLO (Frixione, Hirschi, Pagani, Shao, Zaro)	done		Laura, Stefano	marco.zaro@gmailNOSPAMPLEASE.com, davide.pagani@uclouvainNOSPAMPLEASE.be, frixione@mailNOSPAMPLEASE.cern.ch, valentin.hirschi@gmailNOSPAMPLEASE.com, erdissshaw@gmailNOSPAMPLEASE.com
1		Sherpa+OpenLoops (Moretti,Pozzorini,Schoenherr, Siegert, Hoeche, Krauss)	done		Laura, Stefano	marek.schoenherr@durhamNOSPAMPLEASE.ac.uk, shoeche@slacNOSPAMPLEASE.stanford.edu, frank.krauss@durhamNOSPAMPLEASE.ac.uk, moretti@physikNOSPAMPLEASE.uzh.ch, pozzorin@physikNOSPAMPLEASE.uzh.ch, frank.siegert@cernNOSPAMPLEASE.ch
1		Powhel (Trocsanyi, Kardos, Garzelli)	done		Laura, Stefano	garzelli@toNOSPAMPLEASE.infn.it, kardos.adam@scienceNOSPAMPLEASE.unideb.hu, zoltan.trocsanyi@cernNOSPAMPLEASE.ch
1		Powheg (Hartanto, Honeywell, Jaeger, Reina, Wackeroth)	done		Laura, Stefano	hartanto@physikNOSPAMPLEASE.rwth-aachen.de, shoneywell2600@gmailNOSPAMPLEASE.com, jaeger@itpNOSPAMPLEASE.uni-tuebingen.de, reina@hepNOSPAMPLEASE.fsu.edu, dow@ubphenoNOSPAMPLEASE.physics.buffalo.edu
1		Herwig7 (Gieseke, Plaetzer, Podskubka, Reuschle)	done		Laura, Stefano	stefan.gieseke@kitNOSPAMPLEASE.edu, simon.platzer@durhamNOSPAMPLEASE.ac.uk, radek.podskubka@kitNOSPAMPLEASE.edu, creuschle@hepNOSPAMPLEASE.fsu.edu
2	ttH NLO EW	MG5_aMC@NLO (Frixione, Hirschi, Pagani, Shao, Zaro)	done		Laura, Stefano	marco.zaro@gmailNOSPAMPLEASE.com, davide.pagani@uclouvainNOSPAMPLEASE.be, frixione@mailNOSPAMPLEASE.cern.ch, valentin.hirschi@gmailNOSPAMPLEASE.com, erdissshaw@gmailNOSPAMPLEASE.com
2		Sherpa+OpenLoops (cross check)	done		Laura, Stefano
3	NLO QCD WWbb	Denner, Feger	done		Stefano	denner@physikNOSPAMPLEASE.uni-wuerzburg.de, robert.feger@physikNOSPAMPLEASE.uni-wuerzburg.de
4	LO lnjjbbbb	Denner, Feger	done		Stefano	idem
5a	NLO+NLL ttH	Kulesza, Motyka, Stebel, Theeuwes	done		Laura	anna.kulesza@uni-muensterNOSPAMPLEASE.de, leszekm@thNOSPAMPLEASE.if.uj.edu.pl, tomasz.stebel@ujNOSPAMPLEASE.edu.pl, vthee_01@uni-muensterNOSPAMPLEASE.de
5b	NLO+NNLL ttH	Broggio, Ferroglia, Pecjak, Signer, Yang	done		Laura	alessandro.broggio@tumNOSPAMPLEASE.de, AFerroglia@citytechNOSPAMPLEASE.cuny.edu, ben.pecjak@durhamNOSPAMPLEASE.ac.uk, adrian.signer@psiNOSPAMPLEASE.ch, yanglilin@pkuNOSPAMPLEASE.edu.cn
6	NLO tH	Demartin, Maltoni, Mawatari, Zaro	done		Laura	federico.demartin@uclouvainNOSPAMPLEASE.be, kentarou.mawatari@vubNOSPAMPLEASE.ac.be, fabio.maltoni@uclouvainNOSPAMPLEASE.be, marco.zaro@gmailNOSPAMPLEASE.com
7a	NLO QCD ttV	Powhel (Garzelli, Kardos, Trocsanyi)	finalizing		Laura	garzelli@toNOSPAMPLEASE.infn.it, kardos.adam@scienceNOSPAMPLEASE.unideb.hu, zoltan.trocsanyi@cernNOSPAMPLEASE.ch
7b	NLO QCD+EW ttV	MG5_aMC@NLO (Frixione, Hirschi, Pagani, Shao, Zaro)	finalizing		Laura	marco.zaro@gmailNOSPAMPLEASE.com, davide.pagani@uclouvainNOSPAMPLEASE.be, frixione@mailNOSPAMPLEASE.cern.ch, valentin.hirschi@gmailNOSPAMPLEASE.com, erdissshaw@gmailNOSPAMPLEASE.com
8	NLO QCD ttVV	MG5_aMC@NLO (Frixione, Hirschi, Pagani, Shao, Zaro)	finalizing		Laura	marco.zaro@gmailNOSPAMPLEASE.com, davide.pagani@uclouvainNOSPAMPLEASE.be, frixione@mailNOSPAMPLEASE.cern.ch, valentin.hirschi@gmailNOSPAMPLEASE.com, erdissshaw@gmailNOSPAMPLEASE.com
9	NLO+PS ttbb - HXSWG studies	MG, Sherpa+OpenLoops, Powhel with ATLAS+CMS	done		Stefano	see https://twiki.cern.ch/twiki/bin/view/LHCPhysics/ProposalTtbb

(0) Introduction

• Mandate of this working group, how we worked, what has been accomplished so far.
• Outline of the section, logical development of topics.
• Future plans.

Tentative number of pages: ~2

(1) NLO QCD+EW predictions for tTH production

• Introduction to cross-section Tables and summary of state-of-the-art NLO QCD+EW calculations (refs).
• Additional plots and informations that cannot be directly deduced from the tables of results.
• In particular: breakdown of various sources of EW LO and NLO effects.

Tentative number of pages: ~4

(2) Comparison of NLO QCD+PS simulations for tTH(bB) signal

• Brief overview of existing implementations of NLO QCD calculation of tTH in various NLO PS Monte Carlo.
• Comparisons have been performed in YR2 and YR3. Now more tools are available and there is urgent need for validation since tTH is being aggressively studied by the experiments for Run 2 physics.
• Details of the comparison
• Results

Tentative number of pages: ~4

(3) NLO WWbbH (ttH production with off-shell top decays)

Proposal by authors of <a href="http://arxiv.org/abs/1412.5290" rel="noreferrer" target="_blank">http://arxiv.org/abs/1412.5290 </a>(Denner, Feger)

• Scale dependence of LO and NLO cross section: table 1 and Figure 3 of 1412.5290
• Off-shell top-quark effects on cross section: numerical results plus Figure 4 if space allows.
• NLO corrections for differential distributions: 2-4 distributions from Figures 6 and 7

Tentative number of pages: ~4

(4) LO lnjjbbbb (irreducible backgrounds to tTH production)

Proposal by the authors of <a href="http://arxiv.org/abs/1412.5290" rel="noreferrer" target="_blank">http://arxiv.org/abs/1412.5290</a> (Denner, Feger)

• Irreducible background and interference effects based on tables 1-3 of 1412.5290
• Irreducible background for M_bb and \phi_bb distributions: Figure 2b and Figure 3a
• depending on space 2 more distributions
• Interference effects for M_bb and \phi_bb distributions Figure 4c and d

Tentative number of pages: ~4

(5a) NLO+NLL threshold resummation for tTH

• Brief description of the most important features of the method used to calculate the resummed tTH cross section.
• Results for 13 and 14 TeV.
• Discussion of the theoretical uncertainties due to scale variation and PDF.

Tentative page number: ~4

(5b) NLO+NNLL SCET-threshold resummation for tTH

• Brief description of the implementation of SCET-threshold resummation for tTH production beyond NLO.
• Discussion of renormalization/factorization scale choice.
• Numerical analysis and results for both total cross sections and differential distributions at 13 and 14 TeV.

Tentative number of pages: ~4

(6) NLO QCD tH

• Brief description of the pp->tH process, in particular the separation of single-top plus Higgs as t-channel, s-channel and tWH associated production.
• t-channel subsection:
  • flavour-scheme dependence, choice of scale mu0=(mt+mh)/4 and definition of the scale + flavour-scheme envelope;
  • PDF+as uncertainties;
  • short comment about other minor sources of uncertainty, like mt and mb.
• s-channel subsection: very short since it's a subdominant channel.

Tentative number of pages: ~4

(7-1) NLO QCD+EW tTV

• short introduction of EW corrections
• Total cross sections (13 and 14 TeV) at NLO QCD+EW for V=Z,W+,W- (no photons): study of fixed vs dynamical scale, test agreement between different calculations.
• detailed setup see https://twiki.cern.ch/twiki/bin/view/LHCPhysics/CrossSectionYR4
• contributing groups and contact persons: MG5_aMC@NLO (Hirschi, Pagani, Shao), Sherpa+OpenLoops (Pozzorini, Lindert)

(7-2) NLO QCD tTV fixed-order predictions for differential distributions (tool comparison)

• for V=Z,W+,W- (no photons) without decays at 13TeV
• detailed setup see https://twiki.cern.ch/twiki/bin/view/LHCPhysics/ProposaltTV
• contributors: MG5_aMC@NLO (Pagani); Sherpa+OpenLoops (Pozzorini, Moretti); Powhel (Trocsanyi)

(7-3) Optional: NLO EW tTV fixed-order predictions for differential distributions

• Option A: examples of 2-3 distributions at 13 TeV taken from http://arxiv.org/abs/1504.03446
• OptionB: setup and distributions as in https://twiki.cern.ch/twiki/bin/view/LHCPhysics/ProposaltTV (plus NLO EW setup as in 7.1)
• Option B allows for merging of 7-2 and 7-3
• contributors: MG5_aMC@NLO (Hirschi, Shao)

(7-4) NLO QCD ttVV

• only V=W+,W^-,Z
• contributors : MG5_aMC@NLO (Pagani)

(8) NLO+PS tT+b-jets

• see https://twiki.cern.ch/twiki/bin/view/LHCPhysics/ProposalTtbb

-- StefanoPozzorini - 2015-11-04