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SUMMARY:Quantum Vacuum: Renormalization Group and Anomalies in Cosmology
DTSTART;VALUE=DATE-TIME:20190923T060000Z
DTEND;VALUE=DATE-TIME:20190927T165000Z
DTSTAMP;VALUE=DATE-TIME:20191016T150200Z
UID:indico-event-187@indico.mitp.Uni-Mainz.DE
DESCRIPTION:The standard cosmological model is ΛCDM\, in which the domina
nt dark energy component of the energy density of the universe is assumed
to be a cosmological constant term\, which is of the same form as quantum
vacuum energy. This suggests that quantum effects may be relevant at cosmo
logical scales\, and leads to possible viable alternative models\, which m
ay soon be testable with increasingly more detailed data. At the same time
the direct detection of gravitational waves by LIGO has ushered in the er
a of gravitational wave and multi-messenger astronomy\, which allow Einste
in’s classical General Relativity to be put through more stringent tests
in strong gravitational fields and finally probe possible quantum effects
in extreme compact stars and black holes.The subject of the one-week topi
cal workshop will be quantum effects in gravitation and cosmology\, in par
ticular\, focusing on the following issues:\n\n\n Conformal Invariance\, t
he Conformal Anomaly\, and Applications of the Effective Action of the Tra
ce Anomaly to Cosmology\;\n The a and c Theorems and Application of Renorm
alization Group Methods to Gravity and Cosmology\;\n Gravitational Condens
ates\, Dynamical Vacuum Energy and Tests of the ΛCDM Model\;\n Quantum Ef
fects in Black Holes\, Quantum Information\, and Prospects for Observation
al Tests of Black Hole Physics with Gravitational Waves by aLIGO\;\n Gravi
tational Stability of the Standard Model Higgs Field at High Energies and
in Inflation.\n\n\nThe following are Confirmed Participants at the Worksho
p:\n\n\n Bartelmann\, Matthias
\n Barvinsky\, Andrei
\n Coriano\, Claudio \n Dvali\, Giorgi
\n Emelyanov\, Slava \n Glavan\, Drazen \n Ketov\,
Sergey\n Lopez Nacir\, Diana\n Maglio\, Matteo Maria
\n Modesto\, Leonardo\n Oshita\, Naritaka\n Peter\, Patrick\n Pirozhenk
o\, Irina\n Popov\, Fedor\n Prokopec\, Tomislav\n Rachwal\, Leslaw\n Ramos
\, Rudnei\n Reuter\, Martin\n Skenderis\, Kostas\n Starobinsky\, Alexei\n
Stergiou\, Andreas\n Theisen\, Stefan\n Turok\, Neil\n Zanusso\, Omar\n\nh
ttps://indico.mitp.uni-mainz.de/event/187/
LOCATION:02.430 (Mainz Institute for Theoretical Physics\, Johannes Gutenb
erg University)
URL:https://indico.mitp.uni-mainz.de/event/187/
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SUMMARY:The Evaluation of the Leading Hadronic Contribution to the Muon g-
2: Toward the MUonE Experiment
DTSTART;VALUE=DATE-TIME:20200330T060000Z
DTEND;VALUE=DATE-TIME:20200403T160000Z
DTSTAMP;VALUE=DATE-TIME:20191016T150200Z
UID:indico-event-195@indico.mitp.Uni-Mainz.DE
DESCRIPTION:The aim of the topical workshop is to assess the state of the
art of the theoretical determination of the muon anomalous magnetic moment
\, aμ \, in view of the anticipated new measurement of the E989 Muon g-2
experiment in Fermilab\, which is expected to improve the present precisio
n by a factor of four\, and the new approach to measure aμ under developm
ent by the E34 collaboration at J-PARC. The workshop will focus on aμHLO
\, the leading hadronic contribution to the muon g-2\, both analyzing the
most recent experimental and theoretical results for its determination\, a
s well as taking into consideration the most recent dedicated lattice calc
ulations. Particular attention will be devoted to MUonE\, a recently propo
sed experiment at CERN which aims at measuring the running of the electrom
agnetic coupling constant in the spacelike region by scattering high-energ
y muons on atomic electrons of a low-Z target through the process μe →
μe. The differential cross section of this process provides the direct me
asurement of aμHLO and\, therefore\, an independent determination of the
theoretical prediction for aμ competitive with the timelike dispersive ap
proach. \nhttps://indico.mitp.uni-mainz.de/event/195/
LOCATION:02.430 (Mainz Institute for Theoretical Physics\, Johannes Gutenb
erg University)
URL:https://indico.mitp.uni-mainz.de/event/195/
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SUMMARY:Precision Tests with Neutral-Current Coherent Interactions with Nu
clei
DTSTART;VALUE=DATE-TIME:20200615T060000Z
DTEND;VALUE=DATE-TIME:20200619T160000Z
DTSTAMP;VALUE=DATE-TIME:20191016T150200Z
UID:indico-event-196@indico.mitp.Uni-Mainz.DE
DESCRIPTION:The MESA facility at Mainz will test the Standard Model (SM) a
nd beyond with low-energy polarized electron scattering. One of the corner
stones of the experimental program at MESA\, the P2 experiment\, is a ~1.8
% measurement of the proton’s weak charge via elastic parity-violating e
lectron scattering (PVES)\, resulting in a ~0.15% determination of the wea
k mixing angle. PVES on C-12 is under discussion as an additional avenue f
or several reasons. First of all\, such a measurement will serve as a cali
bration measurement to study the performance of the P2 experimental appara
tus. Moreover\, a measurement on C-12 is expected to enhance the physics o
utput of PVES@MESA as it will probe a different isospin combination of eff
ective 4-fermion operators. \n\nThe workshop is dedicated to presenting re
sults of presently ongoing studies and to identify those open problems whi
ch will have to be solved to ensure a successful C-12 physics program at M
ESA. \n\nThe physics case of PVES on C-12 will be discussed in a more gene
ral context: the coherent scattering of charged leptons and neutrinos with
nuclei\, that is scattering without exciting the nuclei or producing new
particles. Such coherent interactions involving conserved currents provide
a framework for setting up precision tests of the Standard Model at low e
nergies\, e.g. by measuring weak charges of hadrons. Strong interaction ef
fects cannot renormalize charges associated with conserved currents. Howev
er\, precision requirements of modern experiments are such that generally
small effects due to non-conserved currents appearing at higher order in t
he fine structure constant 𝛼\, and symmetry breaking effects have to be
taken into account when extracting those conserved charges from actual ex
perimental measurements. The challenges arising in precision calculations
of the observables\, experimental techniques\, exposure to possible effect
s due to non-standard particles and interactions allow us to cluster the m
ain focus of the workshop\, the physics case of PVES on C-12.\nhttps://ind
ico.mitp.uni-mainz.de/event/196/
LOCATION:02.430 (Mainz Institute for Theoretical Physics\, Johannes Gutenb
erg University)
URL:https://indico.mitp.uni-mainz.de/event/196/
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