RT info:eu-repo/semantics/article
T1 Bounding elastic photon-photon scattering at s≈1 MeV using a laser-plasma platform
A1 Watt, R.
A1 Kettle, B.
A1 Gerstmayr, E.
A1 King, B.
A1 Alejo, A.
A1 Astbury, S.
A1 Baird, C.
A1 Bohlen, S.
A1 Campbell, M.
A1 Colgan, C.
A1 Dannheim, D.
A1 Gregory, C.
A1 Harsh, H.
A1 Hatfield, P.
A1 Hinojosa, J.
A1 Hollatz, D.
A1 Katzir, Y.
A1 Morton, J.
A1 Murphy, C.D.
A1 Nurnberg, A.
A1 Osterhoff, J.
A1 Põder, K.
A1 Rajeev, P.P.
A1 Roedel, C.
A1 Roeder, F.
A1 Salgado, F.C.
A1 Samarin, G.M.
A1 Sarri, G.
A1 Seidel, A.
A1 Spindloe, C.
A1 Steinke, S.
A1 Streeter, M.J.V.
A1 Thomas, A.G.R.
A1 Underwood, C.
A1 Wu, W.
A1 Zepf, M.
A1 Rose, S.J.
A1 Mangles, S.P.D.
A1 Pérez Callejo, Gabriel
AB We report on a direct search for elastic photon-photon scattering using x-ray and 𝛾 photons from a laser-plasma based experiment. A 𝛾 photon beam produced by a laser wak­efield accelerator provided a broadband 𝛾 spectrum extending to above 𝐸𝛾=200MeV. These were collided with a dense x-ray field produced by the emission from a laser heated germanium foil at 𝐸𝑥≈1.4keV, corresponding to an invariant mass of √𝑠=1.22±0.22MeV. In these asymmetric collisions elastic scattering removes one x-ray and one high-energy 𝛾 photon and outputs two lower energy 𝛾 photons. No changes in the 𝛾 photon spectrum were observed as a result of the collisions allowing us to place a 95% upper bound on the cross section of 1.5e15 μb. Although far from the QED prediction, this represents the lowest upper limit obtained so far for √𝑠≲1MeV.
PB Elsevier
SN 0370-2693
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/74172
UL https://uvadoc.uva.es/handle/10324/74172
LA eng
NO Physics Letters B, Febrero 2024, vol. 861, p. 139247
NO Producción Científica
DS UVaDOC
RD 24-ene-2025