Inelastic reactions induced by pions on4He at 68, 120, 135, 156, 174 and 208 MeV

Reheating temperature and gauge mediation models of supersymmetry breaking

“…There are also solutions for Λ 3 , Λ 2 < 0, for which a negative contribution from ξ (8,3,0) to Λ 2 dominates over negative ξ (8,1,0) and partially cancels the contribution from ξ (6,2,5) . Similarly as in model (ii), desired parameters can be obtained easily, since there are two representations with zero hypercharge in 75, though in this case we are more restricted by the SU (2) sector, since all representations charged under SU (2) also carry SU (3) charge.…”

“…With this messenger sector it is straightforward to get κ 2 ranging in value from 0.052 to 0.16, covering what is needed to reproduce Table 3. The smallness of Λ 3 is achieved mainly thanks to a large negative value of ξ (8,1,0) which partially cancels the contribution of ξ (8,3,0) and ξ (6,2,5) , and the latter, having the largest d i , are constrained by the required values of Λ 2 .…”

“…The question of reconciling supersymmetric dark matter scenarios with the standard evolution of the Universe from very high temperatures was raised long ago [1,2,3,4,5,6,7,8] and addressed by many authors since (see, e.g., [9] for a review). It is well known that with unstable gravitinos we face the so-called gravitino problem, as for example in generic gravity mediation scenarios of supersymmetry breaking with neutralino lightest supersymmetric partner (LSP).…”

Supersymmetric mass spectra for gravitino dark matter with a high reheating temperature

“…NLSP decays taking place during or after BBN, can alter its successful predictions if the relic abundance of the NLSP and/or the hadronic branching fraction in the NLSP decay is large enough [30][31][32][33][34][35][36][37][38][39][40][41]. Furthermore, if the NLSP is charged, it can bind with nuclei, which facilitates the production of 6 Li [42][43][44].…”