Abstract
We develop a bottom-up approach to studying SUSY with light stops and sbottoms, but with other squarks and sleptons heavy and beyond reach of the LHC. We discuss the range of squark, gaugino and Higgsino masses for which the electroweak scale is radiatively stable over the “little hierarchy” below 10TeV. We review and expand on indirect constraints on this scenario, in particular from flavor and CP tests. We emphasize that in this context, R-parity violation is very well motivated. The phenomenological differences between Majorana and Dirac gauginos are also discussed. Finally, we focus on the light subsystem of stops, sbottom and neutralino with R-parity, in order to probe the current collider bounds. We find that 1/fb LHC bounds are mild and large parts of the motivated parameter space remain open, while the 10/fb data can be much more decisive.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
S. Dimopoulos and H. Georgi, Softly Broken Supersymmetry and SU(5), Nucl. Phys. B 193 (1981) 150 [INSPIRE].
N. Sakai, Naturalness in Supersymmetric Guts, Z. Phys. C 11 (1981) 153 [INSPIRE].
S. Dimopoulos and G. Giudice, Naturalness constraints in supersymmetric theories with nonuniversal soft terms, Phys. Lett. B 357 (1995) 573 [hep-ph/9507282] [INSPIRE].
A.G. Cohen, D. Kaplan and A. Nelson, The More minimal supersymmetric standard model, Phys. Lett. B 388 (1996) 588 [hep-ph/9607394] [INSPIRE].
R. Sundrum, SUSY Splits, But Then Returns, JHEP 01 (2011) 062 [arXiv:0909.5430] [INSPIRE].
R. Barbieri, E. Bertuzzo, M. Farina, P. Lodone and D. Pappadopulo, A Non Standard Supersymmetric Spectrum, JHEP 08 (2010) 024 [arXiv:1004.2256] [INSPIRE].
N. Craig, D. Green and A. Katz, (De)Constructing a Natural and Flavorful Supersymmetric Standard Model, JHEP 07 (2011) 045 [arXiv:1103.3708] [INSPIRE].
K.S. Jeong, J.E. Kim and M.-S. Seo, Gauge mediation to effective SUSY through U(1)s with a dynamical SUSY breaking and string compactification, Phys. Rev. D 84 (2011) 075008 [arXiv:1107.5613] [INSPIRE].
H. Baer, J. Sender and X. Tata, The Search for top squarks at the Fermilab Tevatron Collider, Phys. Rev. D 50 (1994) 4517 [hep-ph/9404342] [INSPIRE].
H. Baer, P. Mercadante and X. Tata, Searching for bottom squarks at luminosity upgrades of the Fermilab Tevatron, Phys. Rev. D 59 (1999) 015010 [hep-ph/9808361] [INSPIRE].
H. Baer, S. Kraml, A. Lessa, S. Sekmen and X. Tata, Effective Supersymmetry at the LHC, JHEP 10 (2010) 018 [arXiv:1007.3897] [INSPIRE].
G.L. Kane, E. Kuflik, R. Lu and L.-T. Wang, Top Channel for Early SUSY Discovery at the LHC, Phys. Rev. D 84 (2011) 095004 [arXiv:1101.1963] [INSPIRE].
J. Alwall, J.L. Feng, J. Kumar and S. Su, Dark Matter-Motivated Searches for Exotic 4th Generation Quarks in Tevatron and Early LHC Data, Phys. Rev. D 81 (2010) 114027 [arXiv:1002.3366] [INSPIRE].
J. Alwall, J.L. Feng, J. Kumar and S. Su, B’s with Direct Decays: Tevatron and LHC Discovery Prospects in the \(b\overline b\) + MET Channel, Phys. Rev. D 84 (2011) 074010 [arXiv:1107.2919] [INSPIRE].
N. Bhattacharyya, A. Choudhury and A. Datta, Low mass neutralino dark matter in mSUGRA and more general models in the light of LHC data, Phys. Rev. D 84 (2011) 095006 [arXiv:1107.1997] [INSPIRE].
Y. Kats, P. Meade, M. Reece and D. Shih, The Status of GMSB After 1/fb at the LHC, JHEP 02 (2012) 115 [arXiv:1110.6444] [INSPIRE].
R. Essig, E. Izaguirre, J. Kaplan and J.G. Wacker, Heavy Flavor Simplified Models at the LHC, JHEP 01 (2012) 074 [arXiv:1110.6443] [INSPIRE].
M. Papucci, J.T. Ruderman and A. Weiler, Natural SUSY Endures, arXiv:1110.6926 [INSPIRE].
M. Dine, N. Seiberg and S. Thomas, Higgs physics as a window beyond the MSSM (BMSSM), Phys. Rev. D 76 (2007) 095004 [arXiv:0707.0005] [INSPIRE].
R. Barbieri, L.J. Hall, Y. Nomura and V.S. Rychkov, Supersymmetry without a Light Higgs Boson, Phys. Rev. D 75 (2007) 035007 [hep-ph/0607332] [INSPIRE].
L. Cavicchia, R. Franceschini and V.S. Rychkov, Supersymmetry without a light Higgs boson at the CERN LHC, Phys. Rev. D 77 (2008) 055006 [arXiv:0710.5750] [INSPIRE].
A. Delgado, C. Kolda, J. Olson and A. de la Puente, Solving the Little Hierarchy Problem with a Singlet and Explicit μ Terms, Phys. Rev. Lett. 105 (2010) 091802 [arXiv:1005.1282] [INSPIRE].
G.G. Ross and K. Schmidt-Hoberg, The fine-tuning and phenomenology of the generalised NMSSM, arXiv:1108.1284 [INSPIRE].
B.A. Dobrescu and P.J. Fox, Uplifted supersymmetric Higgs region, Eur. Phys. J. C 70 (2010) 263 [arXiv:1001.3147] [INSPIRE].
M. Ibe, A. Rajaraman and Z. Surujon, Does Supersymmetry Require Two Higgs Doublets?, arXiv:1012.5099 [INSPIRE].
R. Davies, J. March-Russell and M. McCullough, A Supersymmetric One Higgs Doublet Model, JHEP 04 (2011) 108 [arXiv:1103.1647] [INSPIRE].
J. Espinosa and M. Quirós, On Higgs boson masses in nonminimal supersymmetric standard models, Phys. Lett. B 279 (1992) 92 [INSPIRE].
J. Espinosa and M. Quirós, Upper bounds on the lightest Higgs boson mass in general supersymmetric Standard Models, Phys. Lett. B 302 (1993) 51 [hep-ph/9212305] [INSPIRE].
J.R. Espinosa and M. Quirós, Gauge unification and the supersymmetric light Higgs mass, Phys. Rev. Lett. 81 (1998) 516 [hep-ph/9804235] [INSPIRE].
G.F. Giudice, M. Nardecchia and A. Romanino, Hierarchical Soft Terms and Flavor Physics, Nucl. Phys. B 813 (2009) 156 [arXiv:0812.3610] [INSPIRE].
J.A. Bagger, K.T. Matchev and R.-J. Zhang, QCD corrections to flavor changing neutral currents in the supersymmetric standard model, Phys. Lett. B 412 (1997) 77 [hep-ph/9707225] [INSPIRE].
K. Agashe and M. Graesser, Supersymmetry breaking and the supersymmetric flavor problem: An Analysis of decoupling the first two generation scalars, Phys. Rev. D 59 (1999) 015007 [hep-ph/9801446] [INSPIRE].
R. Contino and I. Scimemi, The Supersymmetric flavor problem for heavy first two generation scalars at next-to-leading order, Eur. Phys. J. C 10 (1999) 347 [hep-ph/9809437] [INSPIRE].
R. Barbieri, E. Bertuzzo, M. Farina, P. Lodone and D. Zhuridov, Minimal Flavour Violation with hierarchical squark masses, JHEP 12 (2010) 070 [Erratum ibid. 1102 (2011) 044] [arXiv:1011.0730] [INSPIRE].
G. Isidori, Y. Nir and G. Perez, Flavor Physics Constraints for Physics Beyond the Standard Model, Ann. Rev. Nucl. Part. Sci. 60 (2010) 355 [arXiv:1002.0900] [INSPIRE].
C. Hamzaoui, M. Pospelov and R. Roiban, Constrained MSSM and the electric dipole moment of the neutron, Phys. Rev. D 56 (1997) 4295 [hep-ph/9702292] [INSPIRE].
Y. Li, S. Profumo and M. Ramsey-Musolf, A Comprehensive Analysis of Electric Dipole Moment Constraints on CP-violating Phases in the MSSM, JHEP 08 (2010) 062 [arXiv:1006.1440] [INSPIRE].
A. Pomarol, Grand unified theories without the desert, Phys. Rev. Lett. 85 (2000) 4004 [hep-ph/0005293] [INSPIRE].
K. Agashe, R. Contino and R. Sundrum, Top compositeness and precision unification, Phys. Rev. Lett. 95 (2005) 171804 [hep-ph/0502222] [INSPIRE].
Y. Kawamura, Triplet doublet splitting, proton stability and extra dimension, Prog. Theor. Phys. 105 (2001) 999 [hep-ph/0012125] [INSPIRE].
L.J. Hall and Y. Nomura, Grand unification in higher dimensions, Annals Phys. 306 (2003) 132 [hep-ph/0212134] [INSPIRE].
R. Barbier, C. Berat, M. Besancon, M. Chemtob, A. Deandrea, et al., R-parity violating supersymmetry, Phys. Rept. 420 (2005) 1 [hep-ph/0406039] [INSPIRE].
R. Mohapatra, Neutron-Anti-Neutron Oscillation: Theory and Phenomenology, J. Phys. G 36 (2009) 104006 [arXiv:0902.0834] [INSPIRE].
L. Hall and L. Randall, U(1)-R symmetric supersymmetry, Nucl. Phys. B 352 (1991) 289 [INSPIRE].
L. Randall and N. Rius, The Minimal U(1)-R symmetric model revisited, Phys. Lett. B 286 (1992) 299 [INSPIRE].
P.J. Fox, A.E. Nelson and N. Weiner, Dirac gaugino masses and supersoft supersymmetry breaking, JHEP 08 (2002) 035 [hep-ph/0206096] [INSPIRE].
C. Kilic and S. Thomas, Signatures of Resonant Super-Partner Production with Charged-Current Decays, Phys. Rev. D 84 (2011) 055012 [arXiv:1104.1002] [INSPIRE].
G.F. Giudice, B. Gripaios and R. Sundrum, Flavourful Production at Hadron Colliders, JHEP 08 (2011) 055 [arXiv:1105.3161] [INSPIRE].
J. Hisano, M. Nagai, T. Naganawa and M. Senami, Electric Dipole Moments in PseudoDirac Gauginos, Phys. Lett. B 644 (2007) 256 [hep-ph/0610383] [INSPIRE].
G.D. Kribs, E. Poppitz and N. Weiner, Flavor in supersymmetry with an extended R-symmetry, Phys. Rev. D 78 (2008) 055010 [arXiv:0712.2039] [INSPIRE].
D0 collaboration, V.M. Abazov et al., Search for scalar bottom quarks and third-generation leptoquarks in p p-bar collisions at sqrt(s) = 1.96 TeV, Phys. Lett. B 693 (2010) 95 [arXiv:1005.2222] [INSPIRE].
D0 collaboration, V.M. Abazov et al., Search for pair production of the scalar top quark in the electron+muon final state, Phys. Lett. B 696 (2011) 321 [arXiv:1009.5950]. Long author list - awaiting processing [INSPIRE].
CDF collaboration, T. Aaltonen et al., Search for Production of Heavy Particles Decaying to Top Quarks and Invisible Particles in pp collisions at \(\sqrt {s} = 1.96\,\,TeV\), Phys. Rev. Lett. 106 (2011) 191801 [arXiv:1103.2482] [INSPIRE].
CDF collaboration, T. Aaltonen et al., Search for New T ′ Particles in Final States with Large Jet Multiplicities and Missing Transverse Energy in ppbar Collisions at sqrt(s) = 1.96 TeV, Phys. Rev. Lett. 107 (2011) 191803 [arXiv:1107.3574] [INSPIRE].
Y. Kats and D. Shih, Light Stop NLSPs at the Tevatron and LHC, JHEP 08 (2011) 049 [arXiv:1106.0030] [INSPIRE].
CMS collaboration, S. Chatrchyan et al., Search for Supersymmetry at the LHC in Events with Jets and Missing Transverse Energy, Phys. Rev. Lett. 107 (2011) 221804 [arXiv:1109.2352] [INSPIRE].
CMS collaboration, Search for supersymmetry in all-hadronic events with missing energy, PAS-SUS-11-004.
CMS collaboration, Search for new physics in events with b-quark jets and missing transverse energy in proton-proton collisions at 7 TeV, PAS-SUS-11-006.
ATLAS collaboration, Search for supersymmetry in pp collisions at sqrt(s) = 7TeV in final states with missing transverse momentum, b-jets and no leptons with the ATLAS detector, ATLAS-CONF-2011-098 (2011).
CMS collaboration, Search for new physics with single-leptons at the LHC, PAS-SUS-11-015.
CMS collaboration, Search for new physics in events with opposite-sign dileptons and missing transverse energy, PAS-SUS-11-011.
ATLAS collaboration, Search for supersymmetry in pp 1 collisions at s = 7 TeV in final states with missing transverse momentum, b-jets and one lepton with the ATLAS detector, ATLAS-CONF-2011-130 (2011).
ATLAS collaboration, G. Aad et al., Search for supersymmetry in final states with jets, missing transverse momentum and one isolated lepton in sqrts = 7 TeV pp collisions using 1 f b−1 of ATLAS data, Phys. Rev. D 85 (2012) 012006 [arXiv:1109.6606] [INSPIRE].
ATLAS collaboration, G. Aad et al., Search for squarks and gluinos using final states with jets and missing transverse momentum with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions, arXiv:1109.6572 [INSPIRE].
CMS collaboration, Search for supersymmetry in all-hadronic events with MT2, PAS-SUS-11-005.
J. Alwall, M. Herquet, F. Maltoni, O. Mattelaer and T. Stelzer, MadGraph 5 : Going Beyond, JHEP 06 (2011) 128 [arXiv:1106.0522] [INSPIRE].
T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 Physics and Manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].
M. Cacciari and G.P. Salam, Dispelling the N 3 myth for the k t jet-finder, Phys. Lett. B 641 (2006) 57 [hep-ph/0512210] [INSPIRE].
W. Beenakker, R. Hopker and M. Spira, PROSPINO: A Program for the production of supersymmetric particles in next-to-leading order QCD, hep-ph/9611232 [INSPIRE].
ATLAS collaboration, G. Aad et al., Search for New Phenomena in ttbar Events With Large Missing Transverse Momentum in Proton-Proton Collisions at sqrt(s) = 7 TeV with the ATLAS Detector, Phys. Rev. Lett. 108 (2012) 041805 [arXiv:1109.4725] [INSPIRE].
T. Yamagata, Y. Takamori and H. Utsunomiya, Search for anomalously heavy hydrogen in deep sea water at 4000-m, Phys. Rev. D 47 (1993) 1231 [INSPIRE].
J. Kang, M.A. Luty and S. Nasri, The Relic abundance of long-lived heavy colored particles, JHEP 09 (2008) 086 [hep-ph/0611322] [INSPIRE].
CMS collaboration, Search for Heavy Stable Charged Particles in pp collisions at \(\sqrt {s} = 7\,\,TeV\), CMS PAS EXO-11-022.
W. Beenakker, S. Brensing, M. Krämer, A. Kulesza, E. Laenen, et al., Supersymmetric top and bottom squark production at hadron colliders, JHEP 08 (2010) 098 [arXiv:1006.4771] [INSPIRE].
CMS collaboration, S. Chatrchyan et al., Search for Three-Jet Resonances in pp Collisions at sqrt(s) = 7 TeV, Phys. Rev. Lett. 107 (2011) 101801 [arXiv:1107.3084] [INSPIRE].
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1110.6670
Rights and permissions
About this article
Cite this article
Brust, C., Katz, A., Lawrence, S. et al. SUSY, the Third Generation and the LHC. J. High Energ. Phys. 2012, 103 (2012). https://doi.org/10.1007/JHEP03(2012)103
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP03(2012)103