Mr
Johannes Michel
(DESY)
26/09/2018, 16:30
Particle Phenomenology
We present work on analytically resummed predictions
for two classes of multi-differential observables at the LHC,
namely (1) the simultaneous measurement of the transverse momentum
of a Drell-Yan pair with event shapes like beam thrust
and (2) 0-jet cross sections with realistic jet selection criteria
that are relaxed beyond a certain jet rapidity cut.
Common to both observables is...
Mr
Riccardo Nagar
(DESY)
26/09/2018, 16:45
Particle Phenomenology
Multi-parton interactions in proton-proton scattering are processes in which two or more pairs of partons undergo a hard interaction. In order to rigorously describe multi-parton scattering in perturbative QCD, one needs to prove a factorization theorem that allows one to separate the hard interactions from the collinear and soft ones, in a similar way as has already been done for...
Mr
Gherardo Vita
(MIT)
26/09/2018, 17:00
Particle Phenomenology
In this talk I will present some recent developments in the computation of LHC observables at next to leading power in SCET. I will explain why the analytical computation of power corrections are important for fixed order calculations via subtraction methods and show the first all order resummation of logarithms at subleading power for an event shape.
Dr
Ze Long Liu
(Johannes Gutenberg University Mainz)
26/09/2018, 17:18
Particle Phenomenology
We report on a fully differential next-to-next-to-leading order (NNLO) calculation of s-channel single top (anti-)quark production with a semi-leptonic decay at the LHC, neglecting the color correlation between the light and heavy quark lines and in the narrow width approximation. The NNLO corrections can increase the cross section by about 10% in the low transverse momentum region of the top...
Mr
Daniel Schwartländer
(Institut für theoretische Physik, Universität Münster)
26/09/2018, 17:36
Particle Phenomenology
The measurements of associated production of a vector boson with a top-antitop
quark pair provide an important test for the Standard
Model at the LHC. These are not only key processes to measure the top quark
properties but also are very relevant in searches for new
physics, both as being directly sensitive to it and as providing an
important background. While NNLO calculations for this...
Dr
Robert Szafron
(Technical University of Munich)
26/09/2018, 17:51
Particle Phenomenology
Measurements of lepton magnetic moments provide important tests of the Standard Model and may lead to an indirect discovery of new physics. In my talk, I will discuss bound electron g-factor and recent progress in the computation of the higher order corrections to the magnetic moment of an electron in hydrogen-like ions. I demonstrate a modern effective field theory approach to bound state QED...
Dr
Goutam Das
(DESY)
26/09/2018, 18:09
Particle Phenomenology
We study the resummed transverse momentum spectrum for Drell-Yan production including the bottom mass effect.
The pt-distribution of DY or Z boson is very important observable at the LHC, particularly to the ratio of W boson
and Z boson spectrum to precisely measure of the W boson mass.
The presence of an extra mass scale namely the bottom mass along with the Hard scale and the pt-scale...
Markus Ebert
(MIT)
26/09/2018, 18:27
Particle Phenomenology
Transverse-momentum dependent PDFs (TMDPDFs) are an important ingredient for high-precision measurements of transverse momentum distributions, e.g. of the Higgs boson, and an interesting probe of the proton structure itself. So far, they have only been poorly extracted from measurement. Recently, much progress has been made in calculating PDFs from lattice QCD using the so-called quasi PDF...
Mr
Sebastian Jaskiewicz
(Technische Universität München)
26/09/2018, 18:45
Particle Phenomenology
In the last few years, the resummation of large logarithmic contributions up to next-to-next-to-next-to-leading logarithm has been performed for a number of observables within Soft Collinear Effective Theory (SCET). This formalism has been successful at improving theoretical predictions for several important observables in collider physics. One of the first examples is threshold resummation in...