Vincent Theeuwes (University of Goettingen)
7/16/19, 2:00 PM
The production processes of top quark pair in association to a heavy boson are important studies at the LHC. These types of processes are important in order to directly study the interaction between the top quark and the massive boson. Therefore increased theoretical accuracy is of vital importance. In this talk recent precision theoretical predictions at NLO+NNLL accuracy for these processes...
Prof. Cai-Dian Lu (IHEP, Beijing)
7/16/19, 2:25 PM
All B decays are electroweak decays, but their QCD calculations are very complicated, due to large non-perturbative effects. Since the b quark mass is heavy, we can use a perturbative expansion of 1/m_b to prove factorization. After many years development, theory of hadronic B decays has been developed well using factorization. I will summarize the current situation and recent progress...
Prof. Pekka Sinervo (University of Toronto)
7/16/19, 2:50 PM
Measurements of inclusive and differential cross-sections of top-quark production in proton-proton collisions at centre-of-mass energy of 13 TeV with the ATLAS detector at the Large Hadron Collider are presented. Single top-quark and top-quark pair final states as well as top-quark production in association with heavy flavor jets, vector bosons and a photon are discussed.The measurements...
Mr Robert Vallance (University of Birmingham)
7/16/19, 3:15 PM
The top quark is the heaviest known fundamental particle. As it is the only quark that decays before it hadronizes, this gives the unique opportunity to probe the properties of bare quarks. This talk will focus on a few recent precision measurements of top quark properties in top-quark pair and single top-quark events by the ATLAS Collaboration. Among these is the measurement of...
Keping Xie (Southern Methodist University)
7/16/19, 3:40 PM
We develop Simplified-ACOT scheme with Massive Phase Space (SACOT-MPS), which is a general-mass variable flavor number scheme (GM-VFNS), to deal with heavy-flavor production at hadron colliders. By following the idea of Simplified-ACOT-chi scheme in the deep inelastic scattering (DIS), we categorize the open heavy-flavor diagrams into Flavor Excitation (FE) and Flavor Creation (FC). The...
Mr Paolo Gunnellini (Hamburg University)
7/16/19, 4:30 PM
Herschel Chawdhry (University of Cambridge)
7/16/19, 4:55 PM
In perturbative Quantum Chromodynamics calculations, theoretical uncertainties are ascribed to ambiguities over the choice of the renormalisation scale, $\mu_R$. The BLM/PMC scale-setting procedure is one proposed method to remove this ambiguity. In this work, three ambiguities are identified in the BLM/PMC procedure itself and their numerical impact is studied using the example of the...
Dr WEIMIN SONG (Rutherford Appleton Laboratory)
7/16/19, 5:20 PM
The associated production of vector boson with quarkonia is a key observable for understanding the quarkonium production mechanisms, including the separation of single and double parton scattering components. This talk will present the latest measurements from ATLAS on quarkonium production, including associated production. In addition, searches for, and measurements of exotic states are...