Speaker
Description
Low-mass dielectrons present an exceptional tool to deepen our understanding of the particle production in hadronic collisions. As they are produced during all stages and are unaffected by the strong interaction, they keep the information of their original production mechanism. This allows dielectrons to probe the soft regime of QCD which is often inaccessable otherwise.\
At the Intersecting Storage Rings (ISR) at CERN, an excess of dielectron pairs over the expectation from know dielectron sources had been measured by the AFS experiment at low invariant mass and small pair momenta in pp collisions at $\sqrt{s} = $ 63 GeV. A similar kinematic regime can be accessed with ALICE by reducing the magnetic field of the central barrel solenoid. First results from Run 2 indicate an excess also at LHC energies, but the limited precision of the data did not allow for a final conclusion. With the upgrade of the ALICE detector for Run 3 much higher data-taking rates can be achieved increasing the event statistics by a factor of about 400 compared to Run 2.\
In this poster, a first look at pp collisions at $\sqrt{s}=$ 13.6 TeV taken with reduced magnetic field of $B=0.2$ T will be presented and their potential to address the excess observed in Run 2 and at the ISR will be discussed.
| Is this an experimental talk? | Yes |
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| Is this on behalf of a collaboration? | Yes |
| Which collaboration? | ALICE Collaboration |
| Are you willing to present as a poster if it is not selected for oral presentation? | Yes |