Speaker
Description
In the talk, I will review the production of dark photons with masses 0.4-1.8 GeV in pp-collisions. First, I will briefly summarize the existing approaches to calculating the cross sections of both elastic and inelastic proton bremsstrahlung. Next, I will consider the non-zero momentum transfer between the protons during elastic bremsstrahlung and show that our results agree well with the Weizsacker-Williams approximation for proton beams. Additionally, I will present our results on the factorization of the inelastic proton bremsstrahlung cross section. In our recent work we have included an earlier overlooked contribution to the ppA' vertex related to the Pauli form factor, and thus obtained two new splitting functions. To illustrate the importance of these corrections, I will show the updated sensitivity of the T2K, DUNE and SHiP experiments to visible decays of dark photons. The talk is based on arXiv preprints 2306.15800, 2409.11089 and 2409.11386.
