Supersymmetric signatures at an e gamma collider

Apr, 1996
14 pages
Published in:
  • Phys.Lett.B 381 (1996) 177-184
e-Print:
Report number:
  • TRI-PP-96-9

Citations per year

1996200120062011201501234567
Abstract:
High energy electron-photon colliders provide unique opportunities for probing physics beyond the standard model. We have studied the experimental signatures for two supersymmetric scenarios, with the lightest supersymmetric particle (LSP) being either the lightest neutralino or the gravitino. In the ``neutralino LSP'' scenario favored by the minimal supersymmetric standard model (MSSM), it is found that some basic parameters of the model, μ\mu, tanβ\tan\beta, M1M_1 and M2M_2, may be uniquely determined from the outgoing electron energy spectrum without assuming high scale unification of the masses or couplings. In the ``gravitino LSP'' scenario which occurs naturally in models of low energy dynamical supersymmetry breaking, it is possible to have background-free signatures if the next-to-lightest supersymmetric particle (NLSP) has a long decay length. In cases that the NLSP decays quickly, ways to distinguish among the experimental signatures of the two scenarios and of the standard model (SM) background are discussed.
Note:
  • 14 pages, LaTex file, 3 figures Report-no: TRI-PP-96-9
  • photon electron: exclusive reaction
  • supersymmetry: symmetry breaking
  • sparticle: photoproduction
  • photoproduction: sparticle
  • sparticle: decay modes
  • decay modes: sparticle
  • sparticle: neutral particle
  • postulated particle: LSP
  • postulated particle: gravitino
  • sparticle: mass