# B11 – Top-quark Physics at the LHC

### Project Leaders

Sven-Olaf Moch (e-mail | group homepage)

Jürgen Reuter (e-mail | group homepage)

### Abstract

This project is concerned with the heaviest known elementary particle, the top quark. The major part of the project aims at increasing the precision of the theoretical predictions of the top quark within the Standard Model of Particle Physics, particularly its mass and its production cross section and distributions at hadron colliders. Especially the top quark mass is of great interest due to its influence on the stability of the ground state of the electroweak theory and the lifetime of the universe. For these very accurate predictions, second and third order calculations in perturbation theory with massive degrees of freedom at the forefront of theoretical calculations are needed.

In the second part of the project, making use of the precise predictions of the first
part, possible deviations in the properties of the top quark from those in the
Standard Model are investigated. It is studied whether such deviations can be accessed
at the Large Hadron Collider or future colliders, and how such deviations can be
translated to possible new physics scenarios.

### Researchers

### Former members

Fabian Bach

Bijan Chokoufe Nejad

Thomas Lübbert

Christian Weiss

### Publications

Get these publications as bibtex-file

**"NLO QCD predictions for off-shell t t and t t H production and decay at a linear collider"**

Chokoufé Nejad, Bijan and Kilian, Wolfgang and Lindert, Jonas M. and Pozzorini, Stefano and Reuter, Jürgen and Weiss, Christian

JHEP 12, 075 (2016)

doi: 10.1007/JHEP12(2016)075

eprint: 1609.03390 [hep-ph]

**"Determination of the top-quark mass from hadro-production of single top-quarks"**

Alekhin, S. and Moch, S. and Thier, S.

Phys. Lett. B763, 341-346 (2016)

doi: 10.1016/j.physletb.2016.10.062

eprint: 1608.05212 [hep-ph]

**"Calibration of the Top-Quark Monte Carlo Mass"**

Kieseler, Jan and Lipka, Katerina and Moch, Sven-Olaf

Phys. Rev. Lett. 116, 162001 (2016)

doi: 10.1103/PhysRevLett.116.162001

eprint: 1511.00841 [hep-ph]

**"Top pair threshold production at a linear collider with WHIZARD"**

Bach, Fabian and Stahlhofen, Maximilian

Proceedings, 7th International Workshop on Top Quark Physics TOP2014: Cannes, France, September 28-October 3, 2014 (2014)

eprint: 1411.7318 [hep-ph]

**"Anomalous top charged-current contact interactions in single top production at the LHC"**

Bach, Fabian and Ohl, Thorsten

Phys.Rev. D90, 074022 (2014)

doi: 10.1103/PhysRevD.90.074022

eprint: 1407.2546 [hep-ph]

**"A new observable to measure the top-quark mass at hadron colliders"**

Alioli, Simone and Fernandez, Patricia and Fuster, Juan and Irles, Adrian and Moch, Sven-Olaf and others

Eur.Phys.J. C73, 2438 (2013)

doi: 10.1140/epjc/s10052-013-2438-2

eprint: 1303.6415 [hep-ph]

**"The top quark and Higgs boson masses and the stability of the electroweak vacuum"**

Alekhin, S. and Djouadi, A. and Moch, S.

Phys.Lett. B716, 214-219 (2012)

doi: 10.1016/j.physletb.2012.08.024

eprint: 1207.0980 [hep-ph]

**"On top-pair hadro-production at next-to-next-to-leading order"**

Moch, S. and Uwer, P. and Vogt, A.

Phys.Lett. B714, 48-54 (2012)

doi: 10.1016/j.physletb.2012.06.048

eprint: 1203.6282 [hep-ph]

**"Hadronic top-quark pair-production with one jet and parton showering"**

Alioli, Simone and Moch, Sven-Olaf and Uwer, Peter

JHEP 1201, 137 (2012)

doi: 10.1007/JHEP01(2012)137

eprint: 1110.5251 [hep-ph]

**"HATHOR: HAdronic Top and Heavy quarks crOss section calculatoR"**

Aliev, M. and Lacker, H. and Langenfeld, U. and Moch, S. and Uwer, P. and others

Comput.Phys.Commun. 182, 1034-1046 (2011)

doi: 10.1016/j.cpc.2010.12.040

eprint: 1007.1327 [hep-ph]

**"WHIZARD: Simulating Multi-Particle Processes at LHC and ILC"**

Kilian, Wolfgang and Ohl, Thorsten and Reuter, Jürgen

Eur.Phys.J. C71, 1742 (2011)

doi: 10.1140/epjc/s10052-011-1742-y

eprint: 0708.4233 [hep-ph]

**"AutoDipole: Automated generation of dipole subtraction terms"**

Hasegawa, K. and Moch, S. and Uwer, P.

Comput.Phys.Commun. 181, 1802-1817 (2010)

doi: 10.1016/j.cpc.2010.06.044

eprint: 0911.4371 [hep-ph]

**"Measuring the running top-quark mass"**

Langenfeld, U. and Moch, S. and Uwer, P.

Phys.Rev. D80, 054009 (2009)

doi: 10.1103/PhysRevD.80.054009

eprint: 0906.5273 [hep-ph]

**"Theoretical status and prospects for top-quark pair production at hadron colliders"**

Moch, Sven and Uwer, Peter

Phys.Rev. D78, 034003 (2008)

doi: 10.1103/PhysRevD.78.034003

eprint: 0804.1476 [hep-ph]