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<div>CEBAF Center, Room F224<br>
Wednesday, January 6th<br>
<br>
10.00am - Daniele Paolo Anderle (Tubingen U.)</div>
<div>Higher order effects in lepton-hadron production processes</div>
<div>Abstract: With the ever increasing amount of precise data
available for lepton-hadron processes, the perturbative QCD
framework can be extended to explore effects and corrections that
go beyond the next-to-leading order (NLO) accuracy. We have
investigated some of those corrections such as threshold
resumption of soft gluon emission for hadron multiplicities and
spin asymmetries, Hadron Mass Corrections (HMC) and their
interplay for Deep-Inelastic Scattering (DIS) and Semi-Inclusive
e+ e- Annihilation, and next-to-next-to leading order (NNLO)
corrections to the longitudinal structure function for
Semi-Inclusive DIS (SIDIS). We also present our study towards a
global NNLO fit of Fragmentation Functions together with the
extension to the small x-region which we are currently working on.<br>
<br>
10.45am - Andrea Signori (Vrije U.)</div>
<div>A path into TMD phenomenology</div>
<div>Abstract: I will review some aspects of phenomenology of
Transverse-Momentum-Dependent distributions (TMDs) that I have
been investigating during my PhD and which are potentially
interesting for the 12 GeV physics program at Jefferson Lab. In
particular, I will address the flavor dependence of intrinsic
transverse momentum in unpolarized TMDs, focusing on its
extraction from Semi-Inclusive Deep-Inelastic Scattering (SIDIS)
data and its impact on electron-positron annihilation and
proton-proton collisions. Moreover, I will describe the TMD
factorization theorem for the qT-spectrum of quarkonium produced
in proton-proton collisions and the possibility to extract from it
precise information on (un)polarized gluon TMD PDFs. Finally, I
will present some new TMD structures and discuss their link to
small-x physics.<br>
<br>
11.30am - Xiaonu Xiong (INFN Pavia)<br>
</div>
<div>Hadron Structure: A Large Momentum Effective field Theory
Approach</div>
<div>Abstract: The light-cone parton distributions can be accessed
by a large momentum limit (Large Momentum Effective field Theory,
LaMET) of space-like correlation functions (quasi distribution)
which can be directly simulated on lattice. The perturbative
matching conditions between light-cone and quasi PDF and GPD are
discussed. We present a test of LaMET performed with heavy meson
distribution amplitudes which are perturbatively calculable
through NRQCD refactorization. Recently, A non-perturbative test
using 2-D large Nc QCD is performing. I will also discuss the
parton orbital angular momentum and twist-3 GPD measurement
through hard exclusive processes which can potentially performed
on JLab and future EIC .</div>
<div><br>
12.15pm - Federico Alberto Ceccopieri (Liege U.)</div>
<div>
<div>Particle production in the DIS target fragmentation region </div>
<div>Abstract: After a brief overview of my personal background
and recent research activities, I will discuss particle
production in the target fragmentation region of Semi-Inclusive
Deep Inelastic Scattering (SIDIS) within the framework of
fracture functions. Such distributions simultaneously encode
information both on the parton partecipating the hard scattering
and on the fragmentation of the spectator system into the
observed hadron. Their scale dependence is calculable within
perturbative QCD an a dedicated factorisation theorem guarantees
that they are universal distributions, at least in the context
of SIDIS. Focusing on Lambda hyperons, which are predominantly
produced in the SIDIS target fragmentation region, I present a
recently obtained set of Lambda fracture functions obtained by
performing a QCD fit to a variety of Semi-Inclusive Lambda
production data collected in lepton-nucleon scattering. By using
this set, we present predictions for Lambda observables in the
target fragmentation region of neutral current DIS in CLAS@12
GeV kinematics and discuss the physics potential of such
measurements at this facility. </div>
<br>
-----------------------------<br>
</div>
<br>
CEBAF Center, Room F224<br>
Friday, January 8th<br>
<br>
10:00am - Jeremy Green (Mainz U.)<br>
Nucleon strange electromagnetic form factors from lattice QCD <br>
Abstract: We report a direct lattice QCD calculation of the strange
nucleon electric and magnetic form factors. By using high statistics
and a variance reduction technique called hierarchical probing, we
obtain a clear nonzero signal for both form factors for the first
time. We fit the Q<sup class="moz-txt-sup"><span
style="display:inline-block;width:0;height:0;overflow:hidden">^</span>2</sup>-dependence
and determine the strange magnetic moment as well as the strange
electric and magnetic radii. We compare our results to data from
parity-violating electron-proton scattering and to other theoretical
studies. <br>
<br>
10:45am - Padmanath Madanagopalan (Graz U.)<br>
Excited heavy hadrons from lattice QCD<br>
Abstract: As per the invitation I got, for the first five minutes I
will discuss my biography, preferably focussing details beyond what
is discussed in my CV. During the remaining 20 minutes I will
discuss: my research experience and achievements, emphasizing heavy
hadron (mesons, baryons and tetra-quarks) spectroscopy from lattice
QCD, till now and the current calculations that I am involved in.
Emphasis will be given on calculations involving the usage of
state-of-the-art lattice technologies like derivative-based operator
construction, distillation and variational method.<br>
<br>
11:30am - Bipasha Chakraborty (Glasgow U.)
<div>
<div class="page" title="Page 1">
<div class="layoutArea">High precision tests of the Standard
Model using lattice QCD<br>
<div class="column">Abstract: In this talk, I will briefly
discuss my research to test the Standard Model (SM) of
particle physics with high precision and look for signs of
new physics using first principle lattice QCD calculations,
particularly, in the low energy (~ 1 GeV) regime of QCD, the
SU(3) component of the SM. The anomalous magnetic moment of
the muon (a_μ), measured with an impressive accuracy of 0.54
parts per million in experiment, provides one of the most
stringent tests of the SM. Intriguingly, the experimentally
measured anomaly disagrees by around 3 standard deviations
with the calculated value from the SM. The current
theoretical uncertainty is dominated by that from the
calculation of the lowest order "hadronic vacuum
polarisation (HVP)". Improvements in the experimental
uncertainty by a factor of 4 in the upcoming experiments at
Fermilab and J-PARC are expected and improvements in the
theoretical determination would make the discrepancy (if it
remains) really compelling. I will present my results for
improving the theoretical calculation of the HVP
contribution to the anomaly using our (HPQCD) new lattice
QCD method (Phys.Rev. D89 (2014) 11, 114501;
arXiv:1511.05870; arXiv:1512.03270).<br>
The quark flavour sector of the SM is also known to be
potentially very sensitive to new physics effects. Studying
different flavour-changing processes like leptonic and
semi-leptonic decays of mesons and over-constraining the
elements of the Cabibbo-Kobayashi-Maskawa (CKM) unitary
matrix may lead to an internal inconsistency signalling
beyond Standard Model (BSM) physics. In the second part of
this talk I will focus on the progress of my calculation of
V_cs, the central CKM matrix element, by comparing the
lattice QCD results for the scalar and vector form factors
associated with D → Klν semi-leptonic decay and the
experimental decay rate. <br>
<br>
12:15pm - Ben Hoerz (Trinity College)<br>
TBA<br>
<br>
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