Venue: PHYS 02.116
Time: Thursday, February 09, 2023, 2:15 pm
Contact: hees@itp.uni-frankfurt.de
In a recent work from the ALICE
collaboration an excess of relatively soft dilepton pairs was reported
in p+p collisions at 13 TeV. In the report no satisfactory explanation
was found via standard bremsstrahlung computations. I will show in this
presentation how anomalous dilepton pairs are produced
non-perturbatively from the back-reaction of the vacuum to a
$\text{q}\bar{\text{q}}$ pair. The dilepton spectrum is computed by
folding this rate with the cross-section for the process $\text{p}+\text{p}
\rightarrow \text{q}+\bar{\text{q}}$ which is computed using the
framework of the Color Glass Condensate Effective Field Theory (CGC EFT)
in the $k$-factorized limit. The resulting spectra are compatible within
uncertainties with the data, and moreover, provide exciting insight into
the non-perturbative phenomena that ultra-soft electromagnetic radiation
can probe.