Search

The underground Large Volume Detector (LVD) has been in operation at the Gran Sasso National Laboratory since 1992. The research program includes a search for neutrino bursts from stellar core colapses, studies of the cosmic ray penetrating component, and investigations of background sources at detecting rare events. In this work, the low-energy background (E > 0.5 MeV) in the LVD experiment is analyzed.

A maximally complete set of differential cross section has been obtained in Born approximation for pair production of exotic particles with various spinsJ=0,1/2, 1 and quantum numbers (colored and colorless) both inq $$\bar q$$ - andgg-collisions. For vector boson processes we systematically use the connection of the unitary of their interaction with gauge invariance, factorization properties of nonabelian gauge amplitudes and the presence of kinematic zeros. Besides, the problem of admissibility of massless limit for these processes is being discussed. The, yields of exotic particle pairs at $$\mathop p\limits^{( - )} $$ p colliding beams in TeV energy range have been calculated and limits for the accessible mass range have been found.