Cosmology of long-lived stau scenarios in the light of the LHC results

Transcription

1 Cosmology of long-lived stau scenarios in the light of the LHC results Jan Heisig Hamburg University SUSY 2013, ICTP, Trieste August 30, 2013

2 Introduction If supersymmetry fundamental symmetry: supergravity gravitino G Production of G in the early universe Ω G T R [Bolz, Buchmüller, Plümacher 98; Bolz, Brandenburg, Buchmüller 00; Pradler, Steffen 07] Accommodate Leptogenesis: T R 10 9 GeV [Davidson, Ibarra 02; Buchmüller, Di Bari, and Plümacher 04] Link Leptogenesis Supersymmetry Via two cosmological observations BBN predictions DM abundance Jan Heisig 1 / 11 SUSY 2013

3 The gravitino puzzle Phenomenological wide range Ω G T R Decays of G XX or X GX suppressed, long-lived = DM Leptogenesis > 2 kev m soft? m soft m soft Jan Heisig 2 / 11 SUSY 2013

4 The gravitino puzzle Phenomenological wide range Ω G T R Decays of G XX or X GX suppressed, long-lived = DM Leptogenesis > 2 kev m soft? m soft m soft To avoid BBN constraints small NLSP freeze-out abundance Y = n s Ωh 2 GeV m Jan Heisig 2 / 11 SUSY 2013

5 Looking for small NLSP yields Consider NLSP = τ 1 Possible values for Y τ1 in MSSM? Implications from LHC for Y τ1 Higgs around 125 GeV Direct SUSY searches: Long-lived τ 1 HSCP searches Completely different signatures! Jan Heisig 3 / 11 SUSY 2013

6 pmssm Monte Carlo scan Monte Carlo scan over 17-dim. pmssm A t, A b, A τ ; µ, tan β, m A ; M 1, M 2, M 3 ; θ τ, m τ1 ; θ t, m t 1, m b1 ; m L1,2, mẽ1,2, m Q1,2 = mũ1,2 = m d1,2 Interprete Higgs discovery in MSSM: 123 GeV < m h/h < 128 GeV [ATLAS, CMS 12] Used tools: Spectrum, Higgs decays and precision observables: SuSpect, FeynHiggs Decay tables: SDecay, Whizard Cross sections: Fast XS estimation based on Prospino and NLL Fast, Whizard Stau yield and flavor observables: micromegas Jan Heisig 4 / 11 SUSY 2013

7 pmssm scan constraints Interpretation of the HSCP search at the 7 and 8 TeV LHC Consider all SUSY xs (also pp h/h τ 1 τ 1 ) Estimated σlimit obs for each point from [CMS Collaboration 13] MSSM Higgs searches at the LHC, Tevatron and LEP via HiggsBounds Flavor and precision observables M W = ± % C.L. (Exp.+Theo. error) [TEW Group 12; Bechtle, Heinemeyer, Stål, Stefaniak, Weiglein Zeune 12] BR(B X s γ) = (3.43 ± 0.56) 10 95% C.L. [Heavy Flavor Averaging Group 12] BR(Bs 0 µ + µ ) = ( ) 10 95% C.L. [LHCb Collaboration 12] Constraints from vacuum (meta-)stability (CCB) Constraints on µ tan β [Kitahara, Yoshinaga 13] Constraints on A τ, A b, A t [Casas, Lleyda, Muñoz 96] Jan Heisig 5 / 11 SUSY 2013

8 pmssm scan dedicated regions Dedicated scan Systematically look at combinations of: Co-annihilation regions Resonances (with H) Large Higgs-sfermion couplings H-resonance: τ 1 H τ 1 m H 2m τ1 b, t b, t [Ratz, Schmidt-Hoberg, Winkler 08; Pradler, Steffen 08] Jan Heisig 6 / 11 SUSY 2013

9 Results stau yield after LHC 7/8 Y τ1 Y τ1 Effect of constraints Effect of constraints m τ1 [ GeV ] m H/m τ1 no constraints [JH Thesis 13; JH, J. Kersten, B. Panes, T. Robens, in preparation] Jan Heisig 7 / 11 SUSY 2013

10 Results stau yield after LHC 7/8 Y τ1 Y τ1 Effect of constraints Effect of constraints m τ1 [ GeV ] m H/m τ1 no constraints passed HSCP search [JH Thesis 13; JH, J. Kersten, B. Panes, T. Robens, in preparation] Jan Heisig 7 / 11 SUSY 2013

11 Results stau yield after LHC 7/8 Y τ1 Y τ1 Effect of constraints Effect of constraints m τ1 [ GeV ] m H/m τ1 [JH Thesis 13; JH, J. Kersten, B. Panes, T. Robens, in preparation] no constraints (additionally) passed FP+HB passed HSCP search Jan Heisig 7 / 11 SUSY 2013

12 Results stau yield after LHC 7/8 Y τ1 Y τ1 Effect of constraints Effect of constraints m τ1 [ GeV ] m H/m τ1 [JH Thesis 13; JH, J. Kersten, B. Panes, T. Robens, in preparation] no constraints passed HSCP search (additionally) passed FP+HB (additionally) passed CCB bounds Jan Heisig 7 / 11 SUSY 2013

13 Search for low stau yields Yields Y only close to a resonant pole m A 2m τ1 No stau left-right mixing: Stop/sbottom co-annihilation: Y EWino co-annihilation: Y Stau left-right mixing: Y Jan Heisig 8 / 11 SUSY 2013

14 What about Leptogenesis? = DM Leptogenesis > 2 kev m soft? m soft m soft So far independent of LSP Clarify the? specify LSP = G Jan Heisig 9 / 11 SUSY 2013

15 Implications for T R Extend param. space by (17+1)-dim. pmssm scan Compute τ τ1, BRs, apply BBN bounds [Jedamzik 08] Require Ω G = Ω Planck DM [JH Thesis 13] Y τ1 TR [ GeV ] no constraints τ τ1 [ sec ] passed HSCP search [ GeV ] (additionally) passed FP+HB+CCB (additionally) passed BBN bounds Jan Heisig 10 / 11 SUSY 2013

16 Conclusion Supersymmetry and Thermal leptogenesis Puzzle Gravitino DM well motivated Long-lived stau NLSP phenomenologically interesting Low-energy approach: pmssm scan Stau yields Y τ only close to a resonant pole m A 2m τ1 (w/ or w/o co-annihilation) Smallest yields: Y τ Leptogenesis? Jan Heisig 11 / 11 SUSY 2013

17 Conclusion Supersymmetry and Thermal leptogenesis Puzzle Gravitino DM well motivated Long-lived stau NLSP phenomenologically interesting Low-energy approach: pmssm scan Stau yields Y τ only close to a resonant pole m A 2m τ1 (w/ or w/o co-annihilation) Smallest yields: Y τ Leptogenesis Jan Heisig 11 / 11 SUSY 2013

18 Conclusion Supersymmetry and Thermal leptogenesis Puzzle Gravitino DM well motivated Long-lived stau NLSP phenomenologically interesting Low-energy approach: pmssm scan Stau yields Y τ only close to a resonant pole m A 2m τ1 (w/ or w/o co-annihilation) Smallest yields: Y τ Leptogenesis Jan Heisig 11 / 11 SUSY 2013

19 Thank you for your attention!