Igor Cherednikov
(University of Antwerp)
08/12/2014, 11:00
Opening address and introduction to philosophy of the meeting
Andrea Signori
(VU University Amsterdam - Nikhef)
08/12/2014, 11:10
Federico Alberto Ceccopieri
(Universita & INFN, Milano-Bicocca (IT))
08/12/2014, 11:20
We solve recently proposed TMD evolution equations for unpolarised quark
in a particular limit which is suitable for comparison with other
results in the literature.
Ignazio Scimemi
(Universidad Complutense (ES))
08/12/2014, 11:45
In this talk I would like to point out the importance of evolution and resummations in the extraction of TMDs. I will make the case of unpolarized TMDPDF and discuss recent results.
I will point out how the knowledge of TMDs can affect the interpretation of the LHC outcomes is some relevant cases.
Igor Cherednikov
(University of Antwerp)
08/12/2014, 13:30
Marco Radici
(urn:Google)
08/12/2014, 14:35
We calculate the transverse momentum dependence in the production of two back-to-back hadrons in electron-positron annihilations at 100 GeV^2. We use the parameters of the transverse-momentum-dependent (TMD) fragmentation functions that we recently extracted from the HERMES multiplicity data at 2.4 GeV^2. We apply TMD evolution according to two different approaches and using different...
Mariaelena Boglione
(University of Turin)
09/12/2014, 09:35
TMD resummation for SIDIS processes is studied in the framework of the original Collins-Soper-Sterman formalism, with special attention to the interplay between perturbative QCD and non-perturbative contributions. Phenomenological implementations of the TMD formalism to SIDIS processes will be discussed with practical examples, exploring different kinematical configurations of SIDIS experiments.
Krzysztof Kutak
(Instytut Fizyki Jadrowej Polskiej Akademii Nauk)
09/12/2014, 11:00
We propose a method to introduce Sudakov effects to unintegrated gluon density promoting it to be hard scale dependent. The advantage of the approach is that it guarantees that the gluon density is positive definite and that on integrated level the Sudakov effects cancel. Besides that the method to introduce the Sudakov effects is convenient since it does not need evaluation of cross section...
José Daniel Madrigal Martínez
09/12/2014, 14:00
We introduce Lipatov's effective action, which displays high-energy factorization in a gauge invariant way through the inclusion of reggeon fields, and show several computational applications of this approach, including the gluon Regge trajectory at two loops and the NLL effective jet vertices for semi-inclusive forward jet production and jet-gap-jet configurations.
Giancarlo Ferrera
(University of Milan)
10/12/2014, 09:30
We consider the transverse-momentum distribution of generic high-mass systems of non-strongly interacting particles (lepton pairs, vector bosons, Higgs particles, ...) produced in hadronic collisions.
The logarithmically-enhanced contributions at small transverse momentum are treated to all perturbative orders by a universal resummation formula that depends on a single process-dependent hard...
Rene angeles martinez
(urn:Google)
10/12/2014, 10:30
Recent developments (JHEP07 (2012) 026) have shown that is not always possible to factorize all collinear singularities into process independent and universal functions. This breakdown of collinear factorization was anticipated using an algorithm to compute the leading soft gluon corrections to a hard process (JHEP08(2006)059). Such algorithm is base on the assumption that the successive...
Miguel Echevarría
(VU/Nikhef)
10/12/2014, 13:30
Francesco Hautmann
(Institute of Theoretical Physics)
10/12/2014, 14:00
Gennady Lykasov
(Joint Inst. for Nuclear Research (RU))
10/12/2014, 14:30
We present new results on the unintegrated TMD (transverse momentum dependent)
gluon density (u.g.d.) at low $x$, which based on our previous study [1].
We match this u.g.d. at low transverse momenta $\mid k_T\mid$ and starting scale $Q_0^2 = 1-3$~GeV$^2$
to the exact solution of the BFKL equation outside of the saturation region at large $\mid k_T\mid$
obtained in [2], which includes all...
Jean-Philippe Lansberg
(IPN Orsay, Paris Sud U. / IN2P3-CNRS)
11/12/2014, 09:25
In this talk, I discuss how the study of quarkonium production in unpolarised and polarised proton-proton collisions can provide important insights on the gluon TMDs. The study of back-to-back production of quarkonium + isolated photon provides a unique way to extract the gluon TMDs f1^g and h1^perp,g at the LHC [1] and at a proposed Fixed-Target ExpeRiment at the LHC (AFTER@LHC). Although...
Hans Van Haevermaet
(University of Antwerp (BE))
11/12/2014, 09:50
In the forthcoming high luminosity phase of the LHC many of the most interesting measurements for precision QCD studies are affected by large pile-up conditions. However, with the recently discovered Higgs boson, which couples in the heavy top limit directly to gluons, we have access to a novel production process to probe QCD by a colour-singlet current. In this study we compare observables in...
Alexey Vladimirov
(urn:Google)
11/12/2014, 10:15
We present the description of the exponentiated diagrams in terms of generating function within the universal diagrammatic technique. In particular, we show the exponentiation of the gauge theory amplitudes involving products of an arbitrary number of Wilson lines of arbitrary shapes, which generalizes the concept of web diagrams. The presented method gives a new viewpoint on the web diagrams...
