A search for the effects of nuclear matter in backward pion-deuteron quasielastic scattering by <sup class="a-plus-plus">6</sup>Li

Results of a kinematically complete experiment on backward $\pi^-d$ quasielastic scattering by $^6$Li are presented. The experiment was carried out at the ITEP 3-m magnetic spectrometer with pion beams of momenta $0.72$, $0.88$, and $1.28$ GeV/c. The Fermi-motion parameters of a quasideuteron cluster and the effective number of quasideuterons in $^6$Li are determined for the $^6Li$($\pi^-,\pi^- d)^4$H reaction. These values agree well with the proton-and electron-beam measurements. The possibility of observation of the effects of deuteron wave-function modification in nuclear matter is discussed for this reaction.