- Invited presentation at the conference “LHC -- The first part of the journey”, KITP, Santa Barbara, July 2013.
- Invited plenary talk at the 2013 Lepton Photon Conference, San Francisco, June 2013.
- Invited presentation at the conference Loopfest 2013, Florida State University, May 2013.
- Theoretical Physics Seminar, CERN, April 2013.
- Colloquium at the University of Hawaii, March 2013.
- Invited talk at “Rencontres de Physique de la Vallee d'Aoste”, Aosta, Italy, Feb 2013.
- Invited talk at the University of Sussex, UK, Dec. 2012.
- Invited plenary talk on top physics at “HCP 2012”, Kyoto, Japan, November 2012.
- Invited seminar at the University of Gottingen, Germany, Nov. 2012
- Invited talk at the “CKM 2012” workshop, Cincinnati, Ohio, USA, September, 2012.
- Theoretical physics seminar, University of Buffalo, Sep 2012.
- Invited Colloquium speaker, Fordham University, New York City, Sep. 2012.
- Theoretical physics seminar, Brookhaven National Lab, Sep, 2012.
- Invited talk at the workshop “QCD @ LHC 2012”, Michigan State University, August 2012.
- Invited talk at the workshop "Tools for precision and discovery physics with top quarks", CERN, July 2012.
- Theoretical physics seminar, University of Freiburg, Germany, July 2012.
- Two lectures at the summer school and workshop “Trends in Particle Physics, Primorsko 2012”, Primorsko, Bulgaria, June 2012.
- Invited plenary talk “Top Physics theory” at the PLHC 2012 Conference, Vancouver, Canada, May 2012.
- Invited talk on “Top-pair production at NNLO QCD” at Loopfest 2012, Pittsburgh, Pennsylvania, USA, May 2012.
- Invited presentation on "NNLO corrections to qqbar -> ttbar" at the CERN workshop "Top physics: from charge asymmetry to the boosted regime", CERN, May, 2012
- Invited presentation on "Precision top physics at hadron colliders" at the conference Loops and Legs in Quantum Field Theory, Wernigerode, Gemany, April 2012.
- Invited seminar on "Progress in precision top physics" at the MPI, Munich, Germany, April 2012.
- Invited talk on "Latest theoretical developments in top physics at hadron colliders" at the DIS 2012 conference, Bonn Germany, March 2012.
- Invited talk on "Theoretical developments in top physics at hadron colliders" at the Winter conference Moriond QCD 2012, March 2012.
- Invited seminar on "Precision physics: the road to discoveries at the LHC", the University of Edinburgh, March 2012.
- Talk on current challenges and future prospects in collider physics, CERN, 27 May 2011.
- “Two-loop effects in heavy flavor processes at hadron colliders”, invited talk at Loopfest 2010. June 2010.
- “Current and future elementary particle colliders: challenges we face in the quest for discoveries”, Colloquium at Texas Tech University Department of Physics. April 2010.
- “Massive gauge theory amplitudes and application to LHC physics”, invited seminar at INRNE, Sofia, Bulgaria, Dec. 2009.
- “Adding precision to top physics at hadron colliders”, talk at the LHC Theory Initiative meeting, Fermilab, Oct 2009.
- “New developments in the structure of massive gauge amplitudes and application to precision top physics at the LHC”, Invited seminar at Johns Hopkins University, Oct. 2009.
- “The top and QCD“, invited plenary talk at ”LHC@BNL: Joint Theory/Experiment Workshop on Early Physics at the LHC” Brookhaven National Lab, June 2009.
- “The top quark mass“, Theory Institute on Top Quark Physics, CERN, May 2009.
- “Resummation and top pair production“, Loopfest 2009, Madison, May 2009.
- Invited overview talk “Top (pair) cross section calculations for the LHC” at the workshop “Standard model discoveries with early LHC data”, University College London, March 30 - April 01, 2009.
- Invited seminar “Precision Phenomenology at the heart of the LHC”, Stony Brook University, March 2009.
- “Top pair production at Hadron Colliders: newest developments”, Invited presentation for the CTEQ collaboration, Feb. 2009.
- “Top pair production at hadron colliders“, Fermilab theory seminar, Jan. 2009.
- “Top pair production at Hadron Colliders: new developments you need to know about”, Invited presentation for DØ collaboration, Fermilab, Jan. 2009.
- “The LHC Revolution”, Florida State University, Jan. 2009.
- “Top pair production at Hadron Colliders: a critical review”, Brookhaven National Lab, Dec. 2008.
- “(Some) New stuff for top-pair production at Hadron Colliders“, talk at Loopfest 7, Buffalo, May 2008.
- “Top Physics: a window to the Terascale”, University of Hawaii, Honolulu, March 2008.
- “New developments in top physics”, Southern Methodist University, Dallas, Feb. 2007.
- “Challenges in Top Physics”, CEA-Saclay, France, December 2007.
- “News in Top Physics”, Humboldt University - Berlin, Jan. 2008.
- “Top Physics at the Terascale” University of Göttingen, Germany, Dec. 2007.
- “Perturbative QCD with heavy flavors: theoretical advances and LHC challenges” seminar at CEA-Saclay, France, December 2007.
- “Precision theoretical predictions for heavy quark production at the new generation of elementary particle collider experiments”, Emmy Noether Fellowship Program Meeting, Frankfurt, Germany, Nov.2007.
- “QCD processes with massive fermions: advances and challenges” University of Milano, Nov. 2007.
- Invited plenary talk on “Differential Cross Sections at NNLO” at the DESY Theory Workshop 2007 “String Theory meets Collider Physics” September 2007.
- “Heavy flavor production at the LHC: towards the NNLO QCD corrections“, KET workshop on QCD and electroweak physics at the LHC, MPI-Munich, July 2007.
- “QCD at higher loops and legs” seminar at the University of Mainz, June 2007.
- “What to expect at the future elementary particle experiments”, University of Edinburgh, May 2007.
- “The singular behavior of massive QCD amplitudes”, SFB/TR-9 meeting, Aahen, February 2007.
- “Precision in the heavy flavor sector: why it is needed and how to achieve it”, seminar at the University of Liverpool, January 2007.
- “Higher-order corrections to heavy-flavor processes”, seminar at IPPP Durham, January 2007.
- “Recent developments towards NNLO precision in the heavy flavor sector”, seminar at the University of Hamburg, December 2006.
- “Precision studies in the heavy flavor sector”, seminar at CERN, November 2006.
- “Factorization and evolution for PDFs and fragmentation functions”, DESY LHC standard model workshop, DESY-Zeuthen, October 2006
- Invited overview talk on “Structure functions and parton densities for LHC“, KET workshop on QCD and electroweak physics at the LHC, DESY-Hamburg, October 2006.
- “On the IR singularities of massive QCD amplitudes beyond one loop“, HP2 workshop, ETH, Zurich, September 2006.
- “Heavy quark fragmentation at NNLO: questions and answers with LHC in mind”, University of Freiburg, July 2006.
- “Heavy quark fragmentation at NNLO: from LEP to the Tevatron and LHC”, Fermilab, June 2006.
- “Three-loop time-like splitting functions in Mellin space and NNLO fragmentation”, Loopfest V, SLAC, June 2006.
- “Progress towards b-fragmentation at NNLO”, HERA-LHC workshop, CERN, June 2006.
- “Higher order calculations in Mellin space and application to time-like processes”, invited talk at “Loops and Legs in Quantum Field Theory”, April 23-28, 2006, Eisenach, Germany.
- “Analytical evaluation of differential distributions in Mellin space”, Rencontres de Moriond workshop on “QCD and High Energy Hadronic Interactions”, La Thuile, Italy, March 18-25, 2006.
- “Higher order perturbative calculations in Mellin space”, University of Zurich, Switzerland, Feb. 2006.
- “Perturbative aspects of light- and heavy-flavor fragmentation in NNLO QCD”, DESY, Zeuthen, October 2005.
- “The photon spectrum in B->s+gamma in NNLO QCD”, Theory workshop DESY, Hamburg, Sep. 2005.
- “B-> s+gamma: the photon spectrum at NNLO”, SLAC, June 2005.
- “The photon spectrum in B->s+gamma at NNLO”, PHENO 2005, Wisconsin, Madison, May 2005.
- “Heavy Quark Fragmentation Function”, DIS 2005, Madison, Wisconsin, April 2005.
- “Soft gluon resummation for heavy quark production”, DIS 2005, Madison, Wisconsin, April 2005.
- “Standard Model Uncertainties in B->s+gamma Branching Fraction and Spectrum”, SuperB Factory Workshop, University of Hawaii, April 2005.
- “Heavy Quark Fragmentation Function at NNLO”, LCWS2005, Stanford University, March 2005
- “Top mass determination from b+lepton invariant mass at the LHC and ILC”, Workshop on LHC/ILC Synergies,SLAC, March 2005.
- “Heavy Quark Perturbative Fragmentation Function at NNLO”, PHENO2004, Madison, Wisconsin,April 2004.
- “Heavy Quark Perturbative Fragmentation Function at NNLO”, Fermilab, April 2004.
- “Heavy Quark Perturbative Fragmentation Function at NNLO”. Talk at Loopfest III (KITP, UCSB), April 2004.
- “Soft-gluon Resummation for Heavy Quark Production in CC DIS”, PHENO 2003, Madison, May 2003.
- “Bottom Quark Fragmentation in Top Quark Decay”, Argonne National Laboratory, Argonne, Illinois, February 2003.
- “Bottom Quark Fragmentation in Top Quark Decay”, Southern Methodist University, Dallas, Feb. 2003.
- “The Radion in the Randall-Sundrum Model”, Oklahoma State University, Stillwater, Oklahoma,November 2002.
- “Top Decay and Bottom Fragmentation in NLO QCD”, DPF 2002, College of William and Mary, Williamsburg, Virginia, May 2002.
- “Top Decay and Bottom Fragmentation in NLO QCD”, PHENO 2002, Madison, Wisconsin, April2002.
- “Hierarchy problem and extra dimensions”, Particle Physics Seminar, University of Rochester, Rochester, New York, April 2002.
- “Bound States in a Model of QFT with Higher Derivatives”, Regular Seminar in Theoretical High Energy Physics, INRNE, Sofia, Bulgaria, September 1997.