Browsing by Author "Kailas S."

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    Search for η-mesic nuclei in a recoil-free transfer reaction
    (2009-01-05) Budzanowski A.; Chatterjee A.; Hawranek P.; Jahn R.; Jain B.K.; Jha V.; Kailas S.; Kilian K.; Kliczewski S.; Kirillov D.; Kirillov D.; Kolev D.; Kravcikova M.; Lesiak M.; Lieb J.; Liu L.C.; MacHner H.; Magiera A.; Maier R.; Martinska G.; Nedev S.; Piskunov N.; Protić D.; Ritman J.; Von Rossen P.; Roy B.J.; Shukla P.; Sitnik I.; Siudak R.; Tsenov R.; Urban J.; Vankova G.
    We have studied the reaction p+Al27 → He3+p+π-+X at recoil-free kinematics. An η meson possibly produced in this reaction would be thus almost at rest in the laboratory system and could therefore be bound with high probability, if nuclear η states exist. The decay of such a state through the N*(1535) resonance would lead to a proton-π- pair emitted in opposite directions. For these conditions we find some indication of such a bound state. An upper limit of ≈0.5 nb is found. © 2009 The American Physical Society.