Khan, Sarif

[["dc.bibliographiccitation.artnumber","193"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Journal of High Energy Physics"],["dc.bibliographiccitation.volume","2019"],["dc.contributor.author","Biswas, Anirban"],["dc.contributor.author","Choubey, Sandhya"],["dc.contributor.author","Covi, Laura"],["dc.contributor.author","Khan, Sarif"],["dc.date.accessioned","2021-11-22T14:31:46Z"],["dc.date.available","2021-11-22T14:31:46Z"],["dc.date.issued","2019"],["dc.description.abstract","In this work, we explain three beyond standard model (BSM) phenomena, namely neutrino masses, the baryon asymmetry of the Universe and Dark Matter, within a single model and in each explanation the right handed (RH) neutrinos play the prime role. Indeed by just introducing two RH neutrinos we can generate the neutrino masses by the Type-I seesaw mechanism. The baryon asymmetry of the Universe can arise from thermal leptogenesis from the decay of lightest RH neutrino before the decoupling of the electroweak sphaleron transitions, which redistribute the B − L number into a baryon number. At the same time, the decay of the RH neutrino can produce the Dark Matter (DM) as an asymmetric Dark Matter component. The source of CP violation in the two sectors is exactly the same, related to the complex couplings of the neutrinos. By determining the comoving number density for different values of the CP violation in the DM sector, we obtain a particular value of the DM mass after satisfying the relic density bound. We also give prediction for the DM direct detection (DD) in the near future by different ongoing DD experiments."],["dc.identifier.doi","10.1007/JHEP05(2019)193"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16224"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/93401"],["dc.language.iso","en"],["dc.notes.intern","Migrated from goescholar"],["dc.relation","info:eu-repo/grantAgreement/EC/H2020/690575/EU//InvisiblesPlus"],["dc.relation","info:eu-repo/grantAgreement/EC/H2020/674896/EU//ELUSIVES"],["dc.relation.eissn","1029-8479"],["dc.rights","CC BY 4.0"],["dc.rights.access","openAccess"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject","Cosmology of Theories beyond the SM; Neutrino Physics"],["dc.subject.ddc","530"],["dc.title","Common origin of baryon asymmetry, Dark Matter and neutrino mass"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","37"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Journal of High Energy Physics"],["dc.bibliographiccitation.volume","2022"],["dc.contributor.author","Biswas, Anirban"],["dc.contributor.author","Khan, Sarif"],["dc.date.accessioned","2022-08-04T12:00:08Z"],["dc.date.available","2022-08-04T12:00:08Z"],["dc.date.issued","2022-07-06"],["dc.date.updated","2022-07-25T11:18:47Z"],["dc.description.abstract","The quest for new physics beyond the Standard Model is boosted by the recently observed deviation in the anomalous magnetic moments of muon and electron from their respective theoretical prediction. In the present work, we have proposed a suitable extension of the minimal Lμ − Lτ model to address these two experimental results as the minimal model is unable to provide any realistic solution. In our model, a new Yukawa interaction involving first generation of leptons, a singlet vector like fermion (χ±) and a scalar (either an SU(2)L doublet Φ 4 ′ $ {\\Phi}_4^{\\prime } $ or a complex singlet Φ 4 ′ $ {\\Phi}_4^{\\prime } $ ) provides the additional one loop contribution to ae only on top of the usual contribution coming from the Lμ − Lτ gauge boson (Zμτ) to both electron and muon. The judicious choice of Lμ − Lτ charges to these new fields results in a strongly interacting scalar dark matter in O $ \\mathcal{O} $ (MeV) range after taking into account the bounds from relic density, unitarity and self interaction. The freeze-out dynamics of dark matter is greatly influenced by 3 → 2 scatterings while the kinetic equilibrium with the SM bath is ensured by 2 → 2 scatterings with neutrinos where Zμτ plays a pivotal role. The detection of dark matter is possible directly through scatterings with nuclei mediated by the SM Z bosons. Moreover, our proposed model can also be tested in the upcoming e+e− colliders by searching opposite sign di-electron and missing energy signal i.e. at the final state."],["dc.identifier.citation","Journal of High Energy Physics. 2022 Jul 06;2022(7):37"],["dc.identifier.doi","10.1007/JHEP07(2022)037"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/112642"],["dc.language.iso","en"],["dc.rights","CC BY 4.0"],["dc.rights.holder","The Author(s)"],["dc.subject","Cosmology of Theories BSM"],["dc.subject","Early Universe Particle Physics"],["dc.subject","Particle Nature of Dark Matter"],["dc.subject","Specific BSM Phenomenology"],["dc.title","(g − 2)e, μ and strongly interacting dark matter with collider implications"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","002"],["dc.bibliographiccitation.issue","02"],["dc.bibliographiccitation.journal","Journal of Cosmology and Astroparticle Physics"],["dc.bibliographiccitation.lastpage","002"],["dc.bibliographiccitation.volume","2018"],["dc.contributor.author","Biswas, Anirban"],["dc.contributor.author","Choubey, Sandhya"],["dc.contributor.author","Covi, Laura"],["dc.contributor.author","Khan, Sarif"],["dc.date.accessioned","2020-12-10T18:15:49Z"],["dc.date.available","2020-12-10T18:15:49Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1088/1475-7516/2018/02/002"],["dc.identifier.eissn","1475-7516"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74962"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Explaining the 3.5 keV X-ray line in a L μ − L τ extension of the inert doublet model"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]