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Exploring Dark Matter and Neutrino Dynamics in MSSM x U(1)B-L Framework

This work investigates the interplay between dark matter candidates and neutrinos within the MSSM x U(1)B-L model. Notably, we explore the role of sneutrinos as potential dark matter constituents and their annihilation channels leading to various final states, including neutrinos detectable by IceCube. We also examine the implications of Majorana versus Dirac neutrino types and their associated flavor violations within the lepton sector. Our conclusions suggest that the interplay of neutrino mass mechanisms and dark matter provides insights into fundamental symmetries in physics.

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Exploring Dark Matter and Neutrino Dynamics in MSSM x U(1)B-L Framework

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  1. Dark Matter and neutrinos BhaskarDutta Texas A&M University Allahverdi, Campbell, Dutta, Phys.Rev. D85 (2012) 035004 Allahverdi, Bornhauser, Dutta, Richardson-McDanielPhys.Rev. D80 (2009) 055026 Allahverdi, Dutta, Richardson-McDaniel, Santoso, Phys.Lett. B677 (2009) 172

  2. MSSM x U(1)B-L are MSSM singlets Fields: Q Qc L Lc QB-L : 1/6 -1/6 -1/2 1/2 1 -1 + SUSY partners The new sneutrino: (inside ) can be a dark matter candidate of this model W = WMSSM + lNcHuL + R. Allahverdi, B. Dutta, K. Richardson-Mcdaniel, Y. Santoso Phys.Rev.D79:075005,2009 Non-zero neutrino masses are well accommodated in U(1)B-L Only left-handed neutrinos have charges under SM Under MSSM x U(1)B-L : Lc contains ec and NcNc: Right Handed Neutrino We have a new gauge boson: +SUSY partner 2 2

  3. MSSM x U(1)B-L and Unification The B-L symmetry is broken: between EW scale to GUT scale The gauge couplings unify => gB-L (TeV) ~ 0.4: Low scale breaking We use the spectrum (from the previous page) : The unification holds with QB-L for Higgs=3/2, -3/2 or (1, -1) R. Allahverdi, B. Dutta, K. Richardson-Mcdaniel, Y. Santoso Phys.Lett.B677:172,2009 MSSM x U(1)B-L can be unified in SO(10) GUT Dutta, Mimura, Mohapatra; Phys.Rev. D87 (2013) 075008 3 3

  4. MSSM x U(1)B-L and Dark Matter Sneutrino annihilate into new Higgs/fermions S-channel Z’, Higgs’ T channel Z’-ino S-channel Z’, Higgs’ F, A: Heavy Higgs final states are also there, but are mostly kinematically suppressed The annihilation cross-sections involving Higgs are governed by the D terms interactions involving MZ’ 4 4

  5. MSSM x U(1)B-L and ICECUBE Case1: Sneutrinosannihilate to produce mostly taus, b’s All these final states produce neutrinosIceCube From Sun • taus, b’s produce left handed neutrino in 3 body decay processes m neutrino flux from Sun mrates detection 5 5

  6. MSSM x U(1)B-L and ICECUBE From Sun Case 2: Sneutrinosannihilate to produce mostlyRight-handed neutrinos which then decay into left handed neutrinos via Dirac coupling mSUGRA:Hyperbolic branch/Focus point. Best case for mSUGRA at the IceCube R. Allahverdi, S. Bornhauser, B. Dutta, K. Richardson-Mcdaniel 6 6

  7. Annihilation to Neutrinos All-sky event rates for 150 GeVsneutrinoDM scatters into 135 GeVRH neutrinos each of which decays to a light neutrino and SM Higgs • All-sky event rates for • 150 GeVNeutralino DM • tt (blue), WW (blue), bb (red) Allahverdi, Campbell, Dutta

  8. Majoranavs Dirac Can we see the difference between Majorana – Dirac type neutrino? Light Neutrino mass: 1) lnL <v> : Dirac type (l is very small) 2) : Majorana type (l is large, MR is 1 TeV or larger) LHC? Any signal ? Indirect Detection? Any Signal Also Neutrino mixing matrix introduces PMNS matrix flavor violation in the slepton sector: LHC signal? LFV In the context of mSUGRA: Allahverdi, Dutta, KamonKrislockPhys.Rev. D86 (2012) 015026

  9. Majoranavs Dirac Dirac Case: Nc does not decay due to small l, DNeff > 0, current Planck: 0:48+0.48-0.45 Majorana case: Nc decays into n + Higgs Higgs decays into bs, t’s: Photon signal (Fermi) and neutrino signal (IceCube) Indirect Detection Allahverdi, Campbell, Dutta, Gao, In preparation

  10. Conclusion • Neutrino mass differences and mixing angles are well measured • Models which explain neutrino masses require new symmetry • These models can have new DM candidate, e.g., spin 0 sneutrino • The origin of neutrino mass can be distinguished indirect detection • The Lepton flavor violation arising in this model can be • investigated at the LHC

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