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Some other specialized searches Like-Charge Dileptons +E miss T Exploit the fact mentioned earlier that gluinos decay into leptons of either charge: Multi-b-jets +E miss T pp → ˜g˜g → (jets)+ℓ ± ℓ ± +E miss T . Produce gluons that decay into bottom quark and bottom squark: pp → ˜g˜g → (t˜t1)(¯t˜t ∗ 1) → (t¯tÑ1)(t¯tÑ1) → bbbb+jets+leptons+E miss T . Light Top Squarks Top squarks withm˜t1 < Min[m Ñ1 +mb +mW,m˜ C1 +mb,mb +m˜ν] have only suppressed flavor-violating decays: pp → ˜t1 ˜t ∗ 1 → (c Ñ1)(¯c Ñ1) → jj +E miss T pp → ˜t1 ˜t ∗ 1 → (bW ∗ Ñ1)( ¯ bW ∗ Ñ1) → b ¯ b+jjjj +E miss T , etc. 118
Kinematically allowed decays of lighter top squark˜t1, for unified gaugino masses (including mSUGRA)M1 = 0.5M2 at the TeV scale: LSP mass [GeV] 500 450 400 350 300 250 200 150 100 tN 1 bC 1 bC 1 and tN 1 bWN 1 bff’N 1 and cN 1 cN 1 50 100 150 200 250 300 350 400 450 500 Lighter Stop Mass (GeV) Red, yellow, orange = 2-body Blue = 3-body Green = competition between 2-body flavor violating, 4-body decays An aside: in green and blue regions, the top squark hadronizes before it decays, and forms bound states. 119
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Supersymmetry and the LHC ICTP Summ
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Lecture 1: Motivation and Introduct
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An analogy: Coulomb self-energy cor
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This “reason” for the positron
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Contributions tom 2 H Dirac fermion
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The Hierarchy Problem We already kn
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Indirect couplings of the Higgs to
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Supersymmetry A SUSY transformation
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How do the Standard Model quarks an
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Why do we need two Higgs supermulti
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Recall that if supersymmetry were a
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The effective Lagrangian has the fo
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Is there any good reason why the su
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Notations for two-component (Weyl)
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Two LH Weyl spinors ξ,χ can form
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To have any chance,δψ should be l
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The auxiliary fieldF does not affec
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Covered in Lecture 1: • The Hiera
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Recall: the Wess-Zumino model Lagra
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From the conserved supercurrents on
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Masses and Interactions for Chiral
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The superpotential W = 1 2 Mij φi
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The auxiliary fieldD a is again nee
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Soft SUSY-breaking Lagrangians It h
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The Superpotential for the Minimal
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Actually, the most general possible
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Consequences if R-parity is conserv
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Is R-parity inevitable? No! MaybeB
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The soft SUSY-breaking Lagrangian o
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Define mass-eigenstate Higgs bosons
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Radiative corrections to the Higgs
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Neutralinos The neutral higgsinos (
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Charginos Similarly, the charged hi
Page 67 and 68: A typical mass hierarchy for the ne
Page 69 and 70: Squarks and Sleptons To treat these
Page 71 and 72: Diagonalizing the top squark mass 2
Page 73 and 74: Lecture 3: Experimental Signatures
Page 75 and 76: Hints of an Organizing Principle Fo
Page 77 and 78: Similarly: TheD 0 ,D 0 system const
Page 79 and 80: The Flavor-Preserving Minimal Super
Page 81 and 82: A reason to be optimistic that this
Page 83 and 84: In SUSY, the potential energy can b
Page 85 and 86: F -term breaking (continued) If you
Page 87 and 88: Spontaneous Breaking of SUSY requir
Page 89 and 90: The O’Raifeartaigh model has the
Page 91 and 92: Planck-scale Mediated SUSY Breaking
Page 93 and 94: Renormalization Group Running for a
Page 95 and 96: Impact of the discoveryMh = 125.5 G
Page 97 and 98: Computer programs can generate the
Page 99 and 100: Superpartner decays: 1) Neutralino
Page 101 and 102: 2) Chargino Decays Charginos ˜Ci h
Page 103 and 104: An important feature of gluino deca
Page 105 and 106: 5) Slepton Decays When Ñ1 is the L
Page 107 and 108: SUSY Limits from LEP2e + e − coll
Page 109 and 110: The LHC vs. Supersymmetric Models,
Page 111 and 112: LHC Signals for SUSY inpp collision
Page 113 and 114: Typical ATLAS cuts for a jets +E mi
Page 115 and 116: A better way of showing the same li
Page 117: For simplified model with ˜g, ˜ Q
Page 121 and 122: Electroweak SUSY production at Hadr
Page 123 and 124: Why has SUSY not been discovered ye
Page 125 and 126: Natural SUSY (continued) This is ac
Page 127 and 128: LSP mass [GeV] 800 700 600 500 400
Page 129 and 130: However, a group of theorists (Kris
Page 131 and 132: Stoponium A spin-0˜t1 ˜t ∗ 1 bo
Page 133 and 134: Split SUSY Arkani-Hamed, Dimopoulos
Page 135 and 136: R-parity violating results from CMS
Page 137 and 138: Compressed SUSY: the limits from je
Page 139 and 140: The LHC will eventually reach √ s
Page 141 and 142: Direct top-squark pair production p
Page 143 and 144: Why I am still optimistic about the
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