Photini in the UV Photini in the IR Photini at the LHC Supersymmetry in the shadow of photini Ken Van Tilburg August 24, 2012 In collaboration with: Masha Baryakhtar (Stanford), Nathaniel Craig (Rutgers, IAS) Reference: arXiv:1206.0751; JHEP 1207 (2012) 164 Arvanitaki et al: arXiv:0909:5440; Phys.Rev.D81 (2010) 075018 1/6 Photini in the UV Photini in the IR Photini at the LHC Table of contents 1 Photini in the UV 2 Photini in the IR 3 Photini at the LHC 2/6 Photini in the UV Photini in the IR Photini at the LHC Photini in the UV Main features of string theory: 1 supersymmetry assume broken at low energy to solve hierarchy problem 2 extra dimensions (6) assume small size generically complex compactification manifold to get SM very simple manifold: 6-torus ! six 1- and 5-cycles, fifteen 2- and 4-cycles, twenty 3-cycles IIB string theory: 4-form gauge field integrated over 3-cycle i R ! 4D vector gauge field without charged matter Aµ = C4 Σi string theory ! SUSY SM many extra \photon" superfields without any charged matter can in principle mix with U(1) hypercharge and among each other 3/6 Photini in the UV Photini in the IR Photini at the LHC Photini in the IR in SUSY limit, no observable effect: Z 2 L ⊃ d θ WaWa + WbWb − 2WaWb shift away mixing: W ! W − W and g ! p ga b b a a 1−2 physical effects from SUSY breaking, when gauginos get mass y µ δL ⊃ zijλi iσ @µλj − mijλi λj expect sizeable number of photini to be lighter than the bino bino-photino + interphotini cascade via emissions of h; Z; γ 4/6 gluino-bino model gluino-squark-bino model drastically weakened hadronic search limits: slightly enhanced leptonic search sensitivity: Photini in the UV Photini in the IR Photini at the LHC Photini at the LHC reduction of missing ET 1.0 bino 150 GeV L . 0.8 +photino Z u . a +photino H H 0.6 0.4 H L H L 0.2 Occurence 0.0 0 200 400 600 800 Missing ET GeV H L 5/6 gluino-bino model gluino-squark-bino model drastically weakened hadronic search limits: slightly enhanced leptonic search sensitivity: Photini in the UV Photini in the IR Photini at the LHC Photini at the LHC reduction of missing ET 1.0 bino 150 GeV L . 0.8 +1 photino Z u . a +2 photini Z H 0.6 0.4 H L H L 0.2 Occurence 0.0 0 200 400 600 800 Missing ET GeV H L 5/6 gluino-squark-bino model slightly enhanced leptonic search sensitivity: Photini in the UV Photini in the IR Photini at the LHC Photini at the LHC CMS Jets+MET 1.1 fb-1 700 reduction of missing ET bino HCMSL bino HMCL drastically weakened hadronic +photino 5 GeV HZL search limits: 600 +photino 5 GeV HhL gluino-bino model Hsquarks decoupledL 500 L GeV H 400 0 c m 300 200 100 400 500 600 700 800 900 mG HGeVL 5/6 gluino-squark-bino model slightly enhanced leptonic search sensitivity: Photini in the UV Photini in the IR Photini at the LHC Photini at the LHC -1 CMS aT 1.1 fb 700 reduction of missing ET bino HCMSL bino HMCL drastically weakened hadronic +photino 5 GeV HZL search limits: 600 +photino 5 GeV HhL gluino-bino model Hsquarks decoupledL 500 L GeV H 400 0 c m 300 200 100 400 500 600 700 800 900 mG HGeVL 5/6 slightly enhanced leptonic search sensitivity: Photini in the UV Photini in the IR Photini at the LHC Photini at the LHC ATLAS Jets+MET 4.7 fb-1 reduction of missing ET 2000 drastically weakened hadronic search limits: gluino-bino model gluino-squark-bino model 1500 L GeV H S m 1000 bino 0 GeV ATL bino 195 GeV MC +photino Z 5 GeV 500 +photino h 5 GeV H L 500 1000 H L 1500 2000 HmL GeV H LG 5/6 H L Photini in the UV Photini in the IR Photini at the LHC Photini at the LHC CMS SS dilepton 4.7fb-1 reduction of missing ET 500 bino CMS cMSSM drastically weakened hadronic bino MC search limits: photinoH 5 GeVL 450 1250 H L gluino-bino model GeV gluino-squark-bino model 1000 GeV g q L 400 slightly enhanced leptonic GeV H 2 search sensitivity: 1 350 m 750 GeV g 300 1000 750 GeV GeV q q 250 500 600 700 800 900 1000 m0 GeV H L 5/6 Photini in the UV Photini in the IR Photini at the LHC Conclusions IF supersymmetry exists at a low scale, then photini could be another signature of stringy origins; the \IF" above becomes more of an \if" if you believe there are generically many light U(1) gauginos associated with realistic SUSY models 6/6.