BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Staying in Academia: Fellowship\, Grants & More to Know
DTSTART:20231017T113000Z
DTEND:20231017T123000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14457@indico.scc.kit.edu
DESCRIPTION:Speakers: Malgorzata Worek (RWTH Aachen University)\n\nhttps:/
/indico.scc.kit.edu/event/3705/contributions/14457/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14457/
END:VEVENT
BEGIN:VEVENT
SUMMARY:News from the Outreach Team
DTSTART:20231018T080000Z
DTEND:20231018T083000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14458@indico.scc.kit.edu
DESCRIPTION:Speakers: Anastasia Boushmelev\, Magnus Schaaf (RWTH Aachen Un
iversity)\, Anton Olsson (Karlsruhe Institute of Technology)\, Alexander L
enz (Siegen University)\, Tilman Plehn\, Zachary Wüthrich (Siegen)\, Mari
e Hein (RWTH Aachen University)\, Felix Kahlhoefer (KIT)\, Robert Harlande
r (RWTH Aachen University)\n\nhttps://indico.scc.kit.edu/event/3705/contri
butions/14458/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14458/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Numerical Multi-Loop Calculations with pySecDec
DTSTART:20231017T133000Z
DTEND:20231017T140000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14528@indico.scc.kit.edu
DESCRIPTION:Speakers: Stephen Jones (Durham University)\, Gudrun Heinrich
(KIT)\, Vitaly Magerya\, Johannes Schlenk ( University of Zurich)\, Anton
Olsson (Karlsruhe Institute of Technology)\, Matthias Kerner (KIT)\n\nWe p
resent a new version of pySecDec\, a program to calculate multi-loop integ
rals numerically. The main theory and underlying algorithms will be explai
ned\, along with an overview of new features from the latest release. In a
ddition\, examples and timings for multi-loop integrals needed for LHC pre
cision physics will be provided.\n\nhttps://indico.scc.kit.edu/event/3705/
contributions/14528/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14528/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The current status of flavour physics - Theory challenges and pros
pects for the LHC
DTSTART:20231016T094500Z
DTEND:20231016T104500Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14613@indico.scc.kit.edu
DESCRIPTION:Speakers: Thomas Mannel (Siegen University)\n\nhttps://indico.
scc.kit.edu/event/3705/contributions/14613/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14613/
END:VEVENT
BEGIN:VEVENT
SUMMARY:How to be a Kind and Happy Researcher
DTSTART:20231016T141500Z
DTEND:20231016T161500Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14428@indico.scc.kit.edu
DESCRIPTION:Speakers: Emma Geoffray (Heidelberg University)\n\nhttps://ind
ico.scc.kit.edu/event/3705/contributions/14428/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14428/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Linear power corrections to hadron collider processes with top-qua
rks
DTSTART:20231017T093000Z
DTEND:20231017T100000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14538@indico.scc.kit.edu
DESCRIPTION:Speakers: Kirill Melnikov (TTP KIT)\, Paolo Nason ( INFN\, Sez
ione di Milano-Bicocca\, and Universita di Milano-Bicocca)\, Sergei Makaro
v (TTP KIT)\, Melih A. Ozcelik (Universite Paris-Saclay\, CNRS\, IJCLab)\n
\nIn this talk the $\\mathcal{O}(\\Lambda_{QCD})$ corrections to processes
with top-quarks will be discussed. A general method to compute these cor
rections based on renormalon calculus and the Low-Burnett-Kroll theorem
will be discussed. We will show that linear power corrections vanish for t
he total cross-section. We also compute such corrections to top-quark kine
matic distributions and show that they can be as large as a percent in cer
tain kinematic regions.\n\nhttps://indico.scc.kit.edu/event/3705/contribut
ions/14538/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14538/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Phenomenological Aspects of Flavoured Majorana Dark Matter
DTSTART:20231017T153000Z
DTEND:20231017T160000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14524@indico.scc.kit.edu
DESCRIPTION:Speakers: Lena Rathmann\n\nAs the non-observation of simple WI
MP candidates puts these models under severe pressure\, we introduce an ex
tended dark sector with a non-trivial flavor structure. The model extends
the Standard Model by a Majorana flavor triplet and a scalar mediator whic
h couples Dark Matter to right-handed up-type quarks. This allows for a si
ngle new source of flavor and CP violation. The rich phenomenology of this
model can be studied by combining constraints of various probes. Furtherm
ore\, we explore the possibility of a conversion-driven freeze-out. This c
an enhance the relic abundance and therefore open up new regions in the pa
rameter space.\n\nhttps://indico.scc.kit.edu/event/3705/contributions/1452
4/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14524/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Top-quark loops for precision Higgs physics
DTSTART:20231018T070000Z
DTEND:20231018T073000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14526@indico.scc.kit.edu
DESCRIPTION:Speakers: Marco Vitti (Karlsruhe Institute of Technology)\n\nT
heoretical calculations for Higgs-related processes at the LHC have reache
d an impressive level of accuracy. One of the technical challenges that st
ill need to be addressed is the computation of two-loop box diagrams with
massive internal lines\, e.g. those arising in the NLO QCD corrections for
$gg \\to ZH$ and $gg \\to ZZ$.\nIn this talk I will present a method for
approximating these diagrams analytically\, via an expansion in terms of a
small transverse momentum. Combining this approximation with a complement
ary expansion in the high-energy limit\, the two-loop amplitude can be eff
iciently evaluated over the complete phase space.\n\nhttps://indico.scc.ki
t.edu/event/3705/contributions/14526/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14526/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Axion-like particle reconstruction and experimental design with si
mulation-based inference
DTSTART:20231018T100000Z
DTEND:20231018T103000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14534@indico.scc.kit.edu
DESCRIPTION:Speakers: Torben Ferber (KIT ETP)\, Alessandro Morandini (KIT\
, IAP)\, Felix Kahlhoefer (KIT)\n\nAxion-like particles (ALPs) arise in BS
M theories with global symmetry breaking. Beam-dump experiments have been
constructed and proposed to look for them at the sub-GeV scale. Given a su
ccessful signal observation\, would we be able to reconstruct the ALP prop
erties even from inaccurate detectors? We use a simulation-based inference
approach to reconstruct the posterior probability of the ALP parameters.
The derived posterior is both narrow and reliable. Moreover\, the neural n
etwork can be quickly trained for different detector properties\, making i
t an ideal framework for optimizing experimental design\n\nhttps://indico.
scc.kit.edu/event/3705/contributions/14534/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14534/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Higgs Production With Full Quark Mass Dependence
DTSTART:20231016T124500Z
DTEND:20231016T131500Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14535@indico.scc.kit.edu
DESCRIPTION:Speakers: Felix Eschment (RWTH Aachen - TTK)\, Tom Schellenber
ger (RWTH Aachen)\, Michal Czakon (RWTH Aachen)\n\nWe present new results
for the Higgs production cross section in the gluon fusion channel at NNLO
in QCD with the inclusion of top\, bottom and charm mass effects. With th
ese results one of the largest remaining uncertainties on the Higgs produc
tion cross section is eliminated.\n\nhttps://indico.scc.kit.edu/event/3705
/contributions/14535/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14535/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Inclusive $B\\to X_c\\ell\\bar{\\nu}$ to order 1/m^5 and the pre
cision determination of Vcb
DTSTART:20231017T070000Z
DTEND:20231017T073000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14533@indico.scc.kit.edu
DESCRIPTION:Speakers: Keri Vos (University of Maastricht)\, Ilija Milutin
(University of Siegen)\, Thomas Mannel (Siegen University)\n\nThe Heavy Qu
ark Expansion has become the major tool for precision calculations for inc
lusive heavy hadron decays. The HQE is an expansion in $1/m_b$. Recently\,
moments of the dilepton spectrum of inclusive $B\\to X_c\\ell\\bar{\\nu}$
were used to precisely extract the CKM matrix element $V_{cb}$. Usually\,
one assumes that the charm quark is heavy\, leading to $\\Lambda_{\\rm{QC
D}}^n/m_c^n$-contributions. A consistent power counting therefore needs to
be set up. Numerically\, we find that $m_c^2\\sim m_b\\Lambda_{\\rm{QCD}}
$. Therefore\, $m_c^2$ should be counted as one power of $m_b$. Consequent
ly\, we need to include $1/m_b^3\\cdot1/m_c^2$-contributions to complete t
he existing calculation at $\\mathcal{O}(1/m_b^4)$\, which we will present
here.\n\nhttps://indico.scc.kit.edu/event/3705/contributions/14533/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14533/
END:VEVENT
BEGIN:VEVENT
SUMMARY:NLO QCD predictions for off-shell $t\\bar{t}W$ production in asso
ciation with a light jet at the LHC
DTSTART:20231017T140000Z
DTEND:20231017T143000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14530@indico.scc.kit.edu
DESCRIPTION:Speakers: Minos Reinartz (RWTH Aachen University)\n\nWe presen
t full off-shell NLO QCD results for $pp \\to t\\bar{t}W^+\\\, j+X$. We co
ncentrate on the multi-lepton decay channel at the LHC with $\\sqrt{s}= 13
$ TeV. In our calculation off-shell top quarks and gauge bosons are descri
bed by Breit-Wigner propagators\, furthermore\, double-\, single- as well
as non-resonant top-quark contributions along with all interference effect
s are consistently incorporated at the matrix element level. We present re
sults for both integrated and differential fiducial cross sections for var
ious renormalisation and factorization scales and different PDF sets. Last
ly we investigate the effects of the additional jet activity by comparing
$pp\\to e^+\\nu_e\\\,\\mu^-\\bar{\\nu}_\\mu\\\,\\tau^+\\nu_\\tau\\\,b\\bar
{b}\\\,j+X$ and $pp\\to e^+\\nu_e\\\,\\mu^-\\bar{\\nu}_\\mu\\\,\\tau^+\\nu
_\\tau\\\,b\\bar{b}+X$.\n\nhttps://indico.scc.kit.edu/event/3705/contribut
ions/14530/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14530/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Looking for Massive ALPs from SN1987A with Cherenkov Detectors
DTSTART:20231018T093000Z
DTEND:20231018T100000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14536@indico.scc.kit.edu
DESCRIPTION:Speakers: Tim Kretz (Karlsruher Institut für Technologie (KIT
- TTP))\, Robert Ziegler (KIT)\n\nIn this talk I present new constraints
on the axion-nucleon coupling $g_{aNN}$ for massive ALPs using SN1987A. S
tandard arguments that restrict the energy loss of core-collapse supernova
e are used\, and novel bounds from modern water Cherenkov detectors are de
rived for axion masses in the MeV range. Recasting the invisible nucleon d
ecay data of SNO+\, a new exclusion limit can be found in the range of $7.
7 \\times 10^{-7} \\\, \\mathrm{GeV}^{-1}$ to $5.0 \\times 10^{-4} \\\, \\
mathrm{GeV}^{-1}$ for masses between 170 keV and 400 keV. Thus\, water Che
renkov detectors allow to extend the constraints by roughly three addition
al orders of magnitude.\n\nhttps://indico.scc.kit.edu/event/3705/contribut
ions/14536/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14536/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Back to the Roots: Tree-Based Algorithms for Weakly Supervised Ano
maly Detection
DTSTART:20231018T113000Z
DTEND:20231018T120000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14532@indico.scc.kit.edu
DESCRIPTION:Speakers: Manuel Sommerhalder (Universität Hamburg)\, David S
hih (Rutgers University)\, Parada Prangchaikul (Universität Hamburg)\, Ma
rie Hein (RWTH Aachen University)\, Thorben Finke (RWTH Aachen University)
\, Tobias Quadfasel (Universität Hamburg)\, Gregor Kasieczka (Universitä
t Hamburg)\, Michael Krämer (RWTH Aachen University)\, Alexander Mück (R
WTH Aachen University)\n\nWeakly supervised methods have emerged as a powe
rful tool for model agnostic anomaly detection at the LHC. While these met
hods have shown remarkable performance on specific signatures such as di-j
et resonances\, their application in a more model-agnostic manner requires
dealing with a larger number of potentially noisy input features. We show
that neural networks struggle with noisy input features and that this iss
ue can be solved by using boosted decision trees. Overall\, boosted decisi
on trees have a superior performance in the weakly supervised setting than
neural networks. Additionally\, we significantly improve the performance
by using an extended set of features.\n\nhttps://indico.scc.kit.edu/event/
3705/contributions/14532/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14532/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Top-quark pair production with two isolated photons at NLO QCD
DTSTART:20231017T090000Z
DTEND:20231017T093000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14527@indico.scc.kit.edu
DESCRIPTION:Speakers: Daniel Stremmer (RWTH Aachen University)\n\nIn this
talk we present the calculation of NLO QCD corrections to $pp\\to t\\bar{t
}\\gamma\\gamma$ in the dilepton and lepton+jet decay channel. The top-qua
rk and W-boson decays are performed in the narrow width approximation pres
erving spin correlations. We discuss the size of NLO QCD corrections at th
e integrated and differential fiducial level. In addition\, we investigate
the distribution of photon bremsstrahlung in $t\\bar{t}$ production and i
ts decays\, as well as the mixed contribution in which photons occur simul
taneously in the production and decays of the top-quark pair.\n\nhttps://i
ndico.scc.kit.edu/event/3705/contributions/14527/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14527/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Four top final states with NLO accuracy in perturbative QCD: 4 lep
ton decay channel
DTSTART:20231017T100000Z
DTEND:20231017T103000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14531@indico.scc.kit.edu
DESCRIPTION:Speakers: Nikolaos Dimitrakopoulos (RWTH Aachen University)\,
Malgorzata Worek (RWTH Aachen University)\n\nIn this talk\, I will present
NLO QCD results for the process $pp\\rightarrow tt\\overline{t}\\overline
{t}$\, focusing on the 4-lepton channel at the LHC with $\\sqrt{s}=13.6$ T
eV. In our calculation\, the top quark and the W boson are treated in the
Narrow Width Approximation (NWA). We are analyzing our findings in two dis
tinct situations: a full one where we have incorporated QCD corrections du
ring both the production and decay processes of the top quarks\, and anoth
er where we have only considered QCD corrections at the production stage\,
assuming that all unstable particles decay with LO accuracy.\n\nhttps://i
ndico.scc.kit.edu/event/3705/contributions/14531/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14531/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Using Gradient Flow to Renormalise Matrix Elements for Meson Mixin
g and Lifetimes
DTSTART:20231016T114500Z
DTEND:20231016T121500Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14542@indico.scc.kit.edu
DESCRIPTION:Speakers: Matthew Black (University Siegen)\n\nNeutral meson m
ixing and meson lifetimes are theory-side parametrised in terms four-quark
operators which can be determined by calculating weak decay matrix elemen
ts using lattice QCD.\nWhile calculations of meson mixing matrix elements
are standard\, determinations of lifetimes typically suffer from complicat
ions in renormalisation procedures because dimension-6 four-quark operator
s can mix with operators of lower mass dimension and\, moreover\, quark-li
ne disconnected diagrams contribute.\n\nWe present work detailing the idea
to use fermionic gradient flow to non-perturbatively renormalise matrix e
lements describing meson mixing or lifetimes\, which later is to be combin
ed with a perturbative calculation to match to the $\\overline{\\rm MS}$ s
cheme.\n\nhttps://indico.scc.kit.edu/event/3705/contributions/14542/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14542/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Higgsstrahlung and Higgs production beyond the Standard Model
DTSTART:20231018T073000Z
DTEND:20231018T080000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14537@indico.scc.kit.edu
DESCRIPTION:Speakers: Sven Yannick Klein (TTK - RWTH Aachen University)\n\
nThe status of Higgsstrahlung and single Higgs production cross-section pr
edictions with the program SusHi is presented. It includes predictions in
the Standard Model but also other models like the MSSM. A discussion of th
e calculation of total cross sections is followed by a description of the
calculation of the invariant mass distribution of the Higgsstrahlung cross
section. Lastly\, methods for the implementation of the calculation of fu
lly differential cross sections as a possible upcoming feature of SusHi is
elaborated which results in a short introduction to subtraction schemes.\
n\nhttps://indico.scc.kit.edu/event/3705/contributions/14537/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14537/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Precision tests of the Standard Model in global SMEFT analyses: Fi
tting with a CLEW
DTSTART:20231018T130000Z
DTEND:20231018T133000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14548@indico.scc.kit.edu
DESCRIPTION:Speakers: Tom Tong (University of Siegen)\n\nRecent examinatio
ns of the semileptonic charged-current have underscored discrepancies with
the Standard Model\, particularly in the Cabibbo Angle Anomaly\, which de
monstrates a 3-sigma deviation. We undertake a rigorous analysis using SME
FT to shed light on potential BSM sources of the Cabibbo anomaly. By integ
rating Collider processes\, Low-energy processes\, and EWPO\, we establish
a holistic CLEW framework\, dedicated to a flavor-assumption-independent
analysis sidelining severe phenomenological constraints. We have also inco
rporated the Akaike Information Criterion\, which promotes a model that no
t only aligns well with experimental data but also circumvents unnecessary
complexities\, accentuating the challenges and prospective avenues for mo
del-independent global analyses.\n\nhttps://indico.scc.kit.edu/event/3705/
contributions/14548/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14548/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dimension-6 HQET Sum Rules for Beyond the Standard Model
DTSTART:20231016T131500Z
DTEND:20231016T134500Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14545@indico.scc.kit.edu
DESCRIPTION:Speakers: Zachary Wüthrich (Siegen)\, Alexander Lenz (Siegen
University)\, Matthew Black (University Siegen)\n\nPrecise determination o
f hadronic matrix elements is crucial for interpreting possible deviations
from the Standard Model observed in flavor physics experiments. While lat
tice QCD provides first-principles calculations\, current results are stil
l limited to a subset of the operators that may appear in theories of new
physics. The sum rule approach employed here allows for a complementary de
termination of matrix elements directly from QCD\, with theoretical uncert
ainties that can be systematically improved order-by-order in perturbation
theory. The Standard Model hadronic matrix elements of dimension-six $\\D
elta F=0\,2$ operators have previously been determined\, and have been sho
wn to be competitive with lattice results. We intend to extend these resul
ts to include the full set of four-quark QCD operators which may appear Be
yond the Standard Model\, and for which no lattice results exist yet. We t
hus include operators with Dirac structures which have not previously been
considered in a sum rules analysis reported in the literature. This will
provide for the first time bag parameter results which can increase the pr
ecision of a wide variety of new physics theories. The bag parameter resul
ts will be determined using HQET sum rules for three-point correlators\, w
hich requires a three-loop computation. In addition there is a one-loop co
mputation of the QCD-HQET matching required.\n\nhttps://indico.scc.kit.edu
/event/3705/contributions/14545/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14545/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Subleading effects in soft-gluon emission at one-loop in QCD
DTSTART:20231017T130000Z
DTEND:20231017T133000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14525@indico.scc.kit.edu
DESCRIPTION:Speakers: Tom Schellenberger (RWTH Aachen)\, Felix Eschment (R
WTH Aachen - TTK)\, Michal Czakon (RWTH Aachen)\n\nWhile the knowledge of
the leading-power behaviour of QCD amplitudes in the soft limit is crucial
for the construction of subtraction schemes\, next-to-leading power (NLP)
results can be used to increase precision\, which has successfully been a
pplied to QED calculations. In this talk\, I will present a universal expr
ession for the soft limit of one-loop QCD amplitudes at NLP\, that is\, an
extension of the LBK theorem to the loop level. The calculation was done
with the Expansion by Regions method. An NLP collinear expression for gene
ral tree-level amplitudes was obtained along the way while analysing the c
ollinear region.\n\nhttps://indico.scc.kit.edu/event/3705/contributions/14
525/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14525/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Progress in N3LO zero-jettiness soft functions calculation
DTSTART:20231016T121500Z
DTEND:20231016T124500Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14543@indico.scc.kit.edu
DESCRIPTION:Speakers: Andrey Pikelner (TTP KIT)\n\nThe increasing accuracy
of measurements at the LHC requires a transition from NNLO to N3LO in QCD
theory predictions. The growing complexity of the IR-divergencies structu
re at N3LO order requires developing new schemes for treating IR-divergenc
ies. One of the promising solutions is the N-jettiness slicing scheme.\nOn
e of the last missing ingredients for applying this scheme at N3LO order i
s a 0-jettiness soft function defined as phase-space integral with the int
egration domain constrained by several theta functions.\nThe complexity of
the analytical calculation of the 0-jettiness soft function due to the pr
esence of integrals with theta functions requires the development of new c
alculation methods. \nIn this talk\, we will discuss the application of mo
dern techniques of multi-loop calculations to integrals with Heaviside the
ta functions and report recent progress in calculating both triple-real an
d real-virtual corrections to N3LO zero-jettiness soft-function in QCD.\n\
nhttps://indico.scc.kit.edu/event/3705/contributions/14543/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14543/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Implications of the B-Mesogenesis on the Phenomenological Observab
les of B Mesons
DTSTART:20231017T150000Z
DTEND:20231017T153000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14540@indico.scc.kit.edu
DESCRIPTION:Speakers: Aleksey Rusov (University of Siegen)\, Ali Mohamed (
Siegen University)\, Maria Laura Piscopo (University of Siegen)\, Alexande
r Lenz (Siegen University)\, Zachary Wüthrich (Siegen university )\n\nThe
aim of our work is to explore the implications of the Baryogenesis model\
,\nwhich is based on the B-Mesogenesis paradigm proposed by G. Elor\, M. E
scudero\, and A. E. Nelson\, on the phenomenological observables of the Bm
eson. Specifically\, we focus on analyzing the non-standard decay channels
of the B-meson into a SM baryon and a dark sector antibaryon\, which were
proposed by the model to address the problems of matter-antimatter asymme
try and the origin of dark matter in the Universe. Building upon recent wo
rk by Alonso-Álvarez\, G. Elor\, M.Escudero [PRD 104\, 035028 (2021)\,arX
iv:2101.02706]\, where the model is further scrutinized\, we employ the He
avy Quark Expansion (HQE) framework to investigate the contributions of th
ese new decay channels to the ratio $τ (B+)/τ (Bd)$ as well as to mixing
observables\, such as $∆M\, ∆Γ\,$ and $a_{sl}$\, in the B systems.\n
\nhttps://indico.scc.kit.edu/event/3705/contributions/14540/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14540/
END:VEVENT
BEGIN:VEVENT
SUMMARY:NLO electroweak corrections to gg -> HH
DTSTART:20231017T073000Z
DTEND:20231017T080000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14523@indico.scc.kit.edu
DESCRIPTION:Speakers: Hantian Zhang (Karlsruhe Institute of Technology)\,
Kay Schoenwald (KIT)\, Matthias Steinhauser (KIT)\, Joshua Davies (KIT)\n\
nWe consider the next-to-leading order electroweak corrections to the Higg
s boson pair productions in gluon fusion. This requires the computation of
two-loop four-point amplitudes with massive internal particles such as to
p quarks\, Higgs and gauge bosons. We perform analytic calculations both i
n the high-energy and large top-quark mass limits. In particular\, we show
that our high energy expansion can even yield precise results above $p_t
≈120$ GeV. The technical challenges are described and results for the vi
rtual corrections are presented.\n\nhttps://indico.scc.kit.edu/event/3705/
contributions/14523/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14523/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Non-factorizable corrections to Higgs production in Vector Boson F
usion
DTSTART:20231017T080000Z
DTEND:20231017T083000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14529@indico.scc.kit.edu
DESCRIPTION:Speakers: Mingming Long (KIT-TTP)\n\nIn this talk\, I will pre
sent two improvements in the understanding of the non-factorizable correct
ions to Higgs production in VBF. One is to go beyond eikonal approximation
and obtain the first power correction. Another is to address the problem
of strong dependence on the renormalization scale of the leading eikonal c
orrections. The new sub-leading contribution will change the current estim
ate of the non-factorizable corrections to VBF cross section by about 20 p
ercent. Furthermore\, including the effects of the running coupling consta
nt reduces the scale dependence in cross section and kinematic distributio
ns.\n\nhttps://indico.scc.kit.edu/event/3705/contributions/14529/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14529/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Anomalies\, Representations and Self-Supervision
DTSTART:20231018T120000Z
DTEND:20231018T123000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14541@indico.scc.kit.edu
DESCRIPTION:Speakers: Tanmoy Modak\, Luigi Favaro (ITP Heidelberg)\, Feide
n Friedrich\, Tilman Plehn\, Barry DIllon\n\nAutoencoders are an effective
analysis tool for model-agnostic searches at the LHC. Unfortunately\, it
is known that their OOD detection performance is not robust and heavily de
pends on the compressibility of the signals. Even if a neural network can
learn the physical content of the low-level data\, the gain in sensitivity
to features of interest can be hindered by redundant information already
explainable in terms of known physics. This poses the problem of construct
ing a representation space where known physical symmetries are manifest an
d discriminating features are retained. I will present ideas in both direc
tions. I will introduce a Machine Learning framework\, known as Contrastiv
e Learning\, that allows for the definition of observables invariant to tr
ansformations and show how to use them for Autoencoders-based anomaly dete
ction.\n\nhttps://indico.scc.kit.edu/event/3705/contributions/14541/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14541/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Diagrammatic resummation of double logarithms in $B_c \\to \\eta_c
$ form factors
DTSTART:20231018T123000Z
DTEND:20231018T130000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14539@indico.scc.kit.edu
DESCRIPTION:Speakers: Philipp Böer (JGU Mainz)\, Vladyslav Shtabovenko (U
niversity of Siegen)\, Thorsten Feldmann (Siegen University)\, Guido Bell
(University of Siegen)\, Dennis Horstmann (Siegen University)\n\nExclusive
$B$-decays are sensitive to contributions from new physics and can thus b
e used to test the Standard Model. At large hadronic recoil Soft-Collinear
Effective Theory is the appropriate theory to describe the QCD dynamics a
nd to resum logarithmic corrections to all orders in perturbation theory.
However\, since the relevant hadronic matrix elements are power suppressed
\, the factorisation of soft and collinear contributions is spoilt by endp
oint divergences. We therefore resort to diagrammatic resummation techniqu
es to derive the double-logarithmic series of the “soft-overlap” contr
ibution to $B_c \\to \\eta_c$ transition form factors\, assuming the scale
hierarchy $m_b \\gg m_c\\gg \\Lambda_{\\rm QCD}$. We find that the leadin
g double logarithms arise from a peculiar interplay of soft-quark “endpo
int logarithms” from ladder diagrams with energy-ordered spectator-quark
propagators\, as well as standard Sudakov-type soft-gluon corrections. We
elucidate the all-order systematics\, and show that their resummation pro
ceeds via a novel type of integral equations.\n\nhttps://indico.scc.kit.ed
u/event/3705/contributions/14539/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14539/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Rare $B_s \\rightarrow l^+ l^-$ decays in a two-Higgs-doublet mode
l with Three Spurions
DTSTART:20231018T090000Z
DTEND:20231018T093000Z
DTSTAMP:20241008T212700Z
UID:indico-contribution-14544@indico.scc.kit.edu
DESCRIPTION:Speakers: Martin Lang (Department of Physics)\, Ulrich Nierste
(Institut fuer Theoretische Teilchenphysik\, KIT CS)\n\nLeptonic decays o
f neutral B mesons provide an excellent probe of physics beyond the Standa
rd Model\, due to the absence of tree-level flavour-changing neutral curre
nts in the Standard Model and the corresponding smallness of the branching
ratio. We present a two-Higgs-doublet model in which flavour-changing neu
tral Higgs couplings to up-type quarks can lift part of the SM suppression
. The model contains three Yukawa spurions\, allowing to systematically su
ppress FCNC couplings in the down-type quark sector. Within this model\, t
he leading contributions to the scalar and pseudoscalar Wilson coefficient
s are calculated through next-to-leading order in QCD. Several experimenta
l constraints from other $|\\Delta B| = 1$ and $|\\Delta B| = 2$ processes
are discussed.\n\nhttps://indico.scc.kit.edu/event/3705/contributions/145
44/
LOCATION:Seminarzentrum (Campus Unteres Schloss | University of Siegen)
URL:https://indico.scc.kit.edu/event/3705/contributions/14544/
END:VEVENT
END:VCALENDAR