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SUMMARY:Dark photon production in pion-proton collisions: bremsstrahlung v
 s Drell–Yan mechanisms
DTSTART;VALUE=DATE-TIME:20261030T151500Z
DTEND;VALUE=DATE-TIME:20261030T153000Z
DTSTAMP;VALUE=DATE-TIME:20261026T010236Z
UID:indico-contribution-6173@cern.ch
DESCRIPTION:Speakers: Ekaterina Kriukova (INR RAS\, ITMP MSU)\nThe study i
 nvestigates the production of dark photons in pion-proton collisions throu
 gh two mechanisms: inelastic pion bremsstrahlung and Drell–Yan-like proc
 ess in the mass range 0.4–3.5 GeV.\n\nThe factorization method\, previou
 sly applied to proton bremsstrahlung processes\, is adapted for pion beams
  to overcome the limitations of chiral perturbation theory at high energie
 s. The splitting function for pion bremsstrahlung is derived\, linking the
  dark photon production cross section to the inclusive inelastic pion-prot
 on scattering cross section.\n \nFor the Drell–Yan process\, both leadin
 g- and next-to-leading-order contributions within perturbative QCD are con
 sidered.\n\nThe results show that pion bremsstrahlung dominates dark photo
 n production for masses 0.4–1.3 GeV\, while the Drell–Yan process beco
 mes dominant in the 1.3–3.5 GeV range. Mean energies of produced dark ph
 otons are estimated for pion momenta relevant to T2K\, DUNE\, and SHiP exp
 eriments.\n\nThese findings provide crucial inputs for dark photon searche
 s in fixed-target experiments\, particularly NA64h at CERN SPS.\n\nhttps:/
 /indico.particle.mephi.ru/event/626/contributions/6173/
LOCATION: Conference Hall 3
URL:https://indico.particle.mephi.ru/event/626/contributions/6173/
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