Conveners
Heavy Quarks: Joint with EW, Higgs and BSM
- Thorsten Kuhl (Deutsches Elektronen-Synchrotron (DE))
- Pietro Govoni (Universita & INFN, Milano-Bicocca (IT))
- Jonas Lindert (University of Durham (GB))
- Guido Bell (University of Siegen)
Heavy Quarks
- There are no conveners in this block
Heavy Quarks
- There are no conveners in this block
Heavy Quarks
- There are no conveners in this block
Measurements of the inclusive and differential cross-sections for top-quark pair and single top production cross sections in proton-proton collisions with the ATLAS detector at the Large Hadron Collider are presented at center-of-mass energies of 8 TeV and 13 TeV. The inclusive measurements reach high precision and are compared to the best available theoretical calculations. These...
Precise measurements of Higgs boson production in association with top-quark pairs
allow for constraints on the top-quark Yukawa coupling, which in turn is crucial to fully
characterise the scalar sector of the Standard Model and could also open a window on
Beyond-the-Standard-Model interactions. At the Large Hadron Collider, searches for
$t\bar{t}H$ production in the dominant $H \to b...
The investigation of the $pp \rightarrow t {\overline t} H$ process is among the highest priorities of the current LHC physics program. Correspondingly, improvements in precision with which theoretical predictions for this process are known are of central importance. In this talk the recent progress concerning theoretical predictions for the signal will be reviewed.
The total top-antitop production cross section at hadron colliders is
one of the key observables of the Standard Model. Comparisons of LHC
measurements with theoretical calculations are being used to determine
the top-quark mass and the strong coupling and are included in global
PDF fits. These applications are currently based on calculations at
the next-to-next-to-leading order (NNLO) in QCD...
The top quark is unique among the known quarks in that it decays before it has an opportunity to form hadronic bound states. This makes measurements of its properties particularly interesting as one can access directly the properties of a bare quark. The latest measurements of these properties with the ATLAS detector at the LHC are presented using 8 TeV and 13 TeV data. Limits on the rate of...
We present a complete description of top quark pair production in association with a hard photon in the dilepton channel. Our calculation is accurate to NLO in QCD. It is based on matrix elements for e+νeμ−ν¯μbb¯γ production and includes all resonant and non-resonant diagrams, interferences, and off-shell effects of the top quarks and the W gauge bosons. This calculation constitutes the first...
Rare decays are powerful probes for Physics beyond the Standard Model
(SM), as new particles can have a large impact on physics observables.
Recent results on lepton universality tests and measurements of
branching fractions and angular distributions of rare b->sll decays have
shown tensions with the SM predictions. The LHCb experiment is ideally
suited for the study of the these flavour...
I will discuss recent developments regarding long-distance effects in B->K(*)l+ l- decays.
Precise knowledge of these effects is needed for the interpretation of the present anomaly seen in the experimental results. The approach I discuss relies on the analytic properties of the hadronic matrix elements. It combines the available theory information beyond the physical phase space with...
The search for CP violation is a large part of the flavour programs at LHCb and the B factories, with pure hadronic decays as the key players. Three-body decays, which form a large part of the B meson branching fraction, contain much more information than two-body decays, because of their non-trivial kinematic structure. Recently, these decays were described using a QCD factorization framework...
We present color planar and complete light quark QCD contributions to the three loop heavy quark form factors in the case of vector, axialvector, scalar and pseudoscalar currents. We evaluate the master integrals applying a new method based on differential equations for general bases, which is applicable for all first order factorizing systems. The analytic results are expressed in terms of...
The Belle II experiment, now operating at the KEK laboratory in Japan, is a substantial upgrade of both the Belle detector and the KEKB $e^+ e^-$accelerator. It aims to collect 50 times more data than existing B-Factory samples. Belle II is uniquely capable to study the so-called "XYZ" particles: heavy exotic hadrons consisting of more than three quarks. First discovered by Belle, these now...
Measurements of CP violation are a core part of the LHCb physics
programme and provide sensitivity to angles of the CKM matrix as well as
probing our understanding of the differences between matter and
antimatter. A summary of recent LHCb results are presented, including
the time-dependent B0->Dpi analysis which profits from the largest
flavour tagged sample analysed by LHCb, the world's first...
In this study, we calculate the mass spectrum, weak decay constants, two photon decay widths, and two gluon decay widths of ground (1S), and radially excited (2S, 3S, 4S) states of pseudoscalar charmoniuum and bottomonium such as η_cand η_b, as well as the mass spectrum, leptonic decay constants and radiative decay widths of ground state (1S) and excited (2S, 1D, 3S, 2D, 4S,3D, 5S, 5D) states...
