A Comparative Study Of Dark Matter In The NMSSM Model Extended By The Seesaw Mechanisms

Although the status of standard model(SM)in the field of particle physics is undoubted,it can not solve the problem of dark matter(DM)candidate.A large number of cosmological and astrophysical observations(i.e.galaxy rotation curves,behaviors of x-ray gases in galaxy clusters,gravitational lensing,red-shift and cosmic microwave background)have established the fact that there are lots of DM in universe;moreover,neutrino oscillation experiment indicates teeny but non-vanishing neutrino masses.The existence of DM and neutrino masses problem indicate the emergence of new physics beyond the SM.Supersymmetry(SUSY)is one of the most popular new physical models,and it includes different theoretical form such as the minimal supersymmetric standard model(MSSM),the next-to-minimal supersymmetric standard model(NMSSM),the -SUSY,and so on.Once imposed with R-parity at low scale,NMSSM has two WIMP-like DM candidates in the form of sneutrino or neutralino.However,sneutrino DM annihilate too rapidly,leading to a very small relic abundance and final ruling out.The constraints of neutralino DM is becoming increasingly strict with the continuous accumulation data of DM direct detection experiment such as PandaX-II,LUX and XENON-1T.We expect to structure a new physical model,which could solve both the problem of DM candidate and neutrino masses at the same time.Seesaw mechanism could settle the trouble of non-vanishing neutrino masses by adding right-handed neutrino fields.Both NMSSM with Type-I Seesaw and Inverse Seesaw can provide sneutrino as the lightest supersymmetric particle(LSP)for DM candidate and give neutrino masses simultaneously.Type-I Seesaw adds a right-handed neutrino field N,but the Yukawa coupling coefficient in it is too small to produce the observable amount of the heavy neutrinos at the high energy colliders.Inverse Seesaw adds two right-hand neutrino field ^,^(3,then it avoid this problem due to the sizable mixture of the right-handed neutrino and the SM neutrino.In this paper,we studied the phenomenological properties of sneutrino DM in NMSSM with Type-I and Inverse Seesaw mechanism comparatively,and the conclusions are as follows:Sneutrino dark matter in two models both have a large area of survival under the limits of LUX-2017 and XENON-1T experimental results,also few points are excluded after adding FermiLAT restriction,so they successfully avoided the harsh restrictions of dark matter detection experiments.Comparatively,the ISS-NMSSM model has more advantages than the Type-I Seesaw model.It not only inherits all the merits of NMSSM and Inverse Seesaw,but also easily to escape the limitations of dark matter direct detection experiments.Simultaneously,we also find that the interactions between the sneutrino and the singlet Higgs field can illuminate the measured relic density,and predict cross sections accepted by both direct and indirect dark matter detection experiments.