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SUMMARY:Precision Tests with Neutral-Current Coherent Interactions with Nu
clei
DTSTART;VALUE=DATE-TIME:20210607T060000Z
DTEND;VALUE=DATE-TIME:20210611T160000Z
DTSTAMP;VALUE=DATE-TIME:20210622T080300Z
UID:indico-event-196@indico.mitp.uni-mainz.de
DESCRIPTION:IMPORTANT NOTICE: This workshop has been cancelled due to COVI
D-19 \nFor more information\, please contact: CARBON2020@uni-mainz.de\n\
nThe MESA facility at Mainz will test the Standard Model (SM) and beyond w
ith low-energy polarized electron scattering. One of the cornerstones of t
he experimental program at MESA\, the P2 experiment\, is a ~1.8% measureme
nt of the proton’s weak charge via elastic parity-violating electron sca
ttering (PVES)\, resulting in a ~0.15% determination of the weak mixing an
gle. PVES on C-12 is under discussion as an additional avenue for several
reasons. First of all\, such a measurement will serve as a calibration mea
surement to study the performance of the P2 experimental apparatus. Moreov
er\, a measurement on C-12 is expected to enhance the physics output of PV
ES@MESA as it will probe a different isospin combination of effective 4-fe
rmion operators. \n\nThe workshop is dedicated to presenting results of pr
esently ongoing studies and to identify those open problems which will hav
e to be solved to ensure a successful C-12 physics program at MESA. \n\nTh
e physics case of PVES on C-12 will be discussed in a more general context
: the coherent scattering of charged leptons and neutrinos with nuclei\, t
hat is scattering without exciting the nuclei or producing new particles.
Such coherent interactions involving conserved currents provide a framewor
k for setting up precision tests of the Standard Model at low energies\, e
.g. by measuring weak charges of hadrons. Strong interaction effects canno
t renormalize charges associated with conserved currents. However\, precis
ion requirements of modern experiments are such that generally small effec
ts due to non-conserved currents appearing at higher order in the fine str
ucture constant 𝛼\, and symmetry breaking effects have to be taken into
account when extracting those conserved charges from actual experimental
measurements. The challenges arising in precision calculations of the obse
rvables\, experimental techniques\, exposure to possible effects due to no
n-standard particles and interactions allow us to cluster the main focus o
f the workshop\, the physics case of PVES on C-12.\nhttps://indico.mitp.un
i-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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SUMMARY:Elliptic Integrals in Fundamental Physics
DTSTART;VALUE=DATE-TIME:20210614T060000Z
DTEND;VALUE=DATE-TIME:20210618T160000Z
DTSTAMP;VALUE=DATE-TIME:20210622T080300Z
UID:indico-event-212@indico.mitp.uni-mainz.de
DESCRIPTION:IMPORTANT NOTICE: This workshop has been cancelled due to COVI
D-19 \nFor more information\, please contact: ELLIPT2020@uni-mainz.de\n\
nScattering amplitudes are the building blocks that allow us to compute pr
edictions for high-energy experiments like the Large Hadron Collider (LHC)
at CERN. Despite their importance\, the computation of scattering amplitu
des is a very complex task. As the number of particles and/or the precisio
n of the prediction increases\, one faces an exponential growth in complex
ity and computations quickly become intractable. At the same time\, the ma
thematical theory of the functions describing generic scattering amplitude
s needed for high precision is insufficiently developed. Novel and powerfu
l techniques are required in order to make precise predictions for collide
r experiments.\n\nWhile there was a lot of progress over the last couple o
f years in understanding the mathematics of the functions that appear in s
cattering amplitude computations\, it is known that new classes of functio
ns show up that are poorly understood even from the mathematical side. The
refore\, these so-called ”elliptic functions” are currently an active
area of research not only in collider physics\, but also in seemingly disc
onnected areas like string theory and pure mathematics.\n\nThe aim of the
topical workshop is to bring together particle physicists\, string theoris
ts and mathematicians working on elliptic functions\, with the grand goal
of advancing our understanding of elliptic functions required to make prec
ise predictions for future particle physics experiments.\nhttps://indico.m
itp.uni-mainz.de/event/212/
LOCATION:
URL:https://indico.mitp.uni-mainz.de/event/212/
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