SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 74: Poster
HK 74.46: Poster
Donnerstag, 23. März 2023, 17:30–19:00, HSZ EG
pp correlation in e+e− collisions at Belle to study the particle emitting source — •Maria Leibelt1, Laura Serksnyte1, Umberto Tamponi2, and Laura Fabbietti1 — 1TU München, Garching, Germany — 2INFN, Sezione di Torino, Turin, Italy
The light antinuclei cosmic rays are considered as a promising probe for the searches of Weakly Interacting Massive Particles (WIMPs) - one of the dark matter candidates. The antinuclei can be produced in dark matter annihilations and detected by experiments near Earth. Understanding the antinuclei fluxes requires knowledge about how light antinuclei are formed. One of the available models is coalescence which suggests that first antinucleons are formed as degrees of freedom and then they coalesce to antinuclei. The probability for the antinucleons to create a bound state depends on the relative momentum in the pair rest frame and the distance at which they are produced. The latter can be constrained with femtoscopic correlation measurements, currently available only for pp and heavy-ion collisions. As a proxy to constrain the source for antinuclei production in the dark matter annihilation, e+e− collisions are preferred since electrons are point-like particles and do not interact strongly. In this poster, we will show the first results on femtoscopic p-p correlations in e+e− collisions measured by Belle at the KEKB collider. The obtained correlation function is then modeled using well known interaction potentials and the size of the source for nucleon pairs is extracted.