Physics Beyond the y y Standard Model Standard Model David Toback David Toback Texas A&M University For the Physics Beyond the Standard Model APS April Meeting CDF and DØ collaborations 1 David Toback, Texas A&M University Mini-Symposium May, 2009
Mini-Symposia on Searches Exciting New Search Results from the Tevatron E iti N S h R lt f th T t Our speakers will show a fun subset today, including • The Dijet Mass Spectrum and a Search for Quark Compositeness at CDF C it t CDF • Search for charged massive long-lived particles at DØ • Search for scalar top decaying into charm and neutralino at CDF CDF • Setting Limits on Gauge Mediated Supersymmetry Breaking Models with Photons at CDF • Search for trilepton SUSY signal at CDF In this talk I’ll provide an overview for these searches to place them in context Also, see Dave Hedin’s Plenary in Session T2 at y 3 30PM 3:30PM today where lots of other, similar, topics d h l f h i il i will be covered The experiments Results pages – contain many more – http://www-d0.fnal.gov/Run2Physics/WWW/results/np.htm – http://www-cdf.fnal.gov/physics/exotic/exotic.html Physics Beyond the Standard Model APS April Meeting 2 David Toback, Texas A&M University Mini-Symposium May, 2009
Tevatron Searches: Looking Back and Looking Forward Looking Back and Looking Forward The LHC era has started but the Tevatron is still collecting data g “Don't look back Don t look back and leading the search for d l di h h f — something Supersymmetry and Beyond the might be gaining Standard Model Physics y on you." It’s been 10 years since the -Satchel Paige Fermilab SUSY-Higgs Workshop take time to look back and take time to look back and remind ourselves what we focused on back then Use this as a context for today’s U thi t t f t d ’ searches to provide insight about what things might look g g lik 10 like 10 years from now f Most results today with between 1 and 4 fb -1 Physics Beyond the Standard Model APS April Meeting of data 3 David Toback, Texas A&M University Mini-Symposium May, 2009
Run II SUSY-Higgs Workshop View The SUSY-Higgs workshop • mSUGRA: Still at the forefront of our searches benchmark model our searches benchmark model was held in 1998 to h ld i 1998 t for SUSY study the prospects for • GMSB: Came into vogue after the the Tevatron Run I CDF ee +Met candidate 5 m in t pi 5 main topics: : event. Still popular today t Still l t d 1.mSUGRA • RPV: Harder to decide what versions are important 2.GMSB • BSM: Many of these models have BSM: Many of these models have 3.RPV been searched for in great detail, (W’, Z’, leptoquarks, etc) 4.BSM (Extra Dimensions) • Notable exceptions: Extra 5.Higgs 5 Higgs Dimensions which has taken on Dimensions which has taken on Clearly envisioned much of prominence since 1998 the very broad and deep • Long-lived heavy particles Tevatron search program Tevatron search program • Higgs: Compelling as it ever was gg p g Omissions? Not envisioned? What’s different in our • No model-independent search thinking? methods What’s the same? What s the same? • Precision Cosmology data P i i C l d t “There are some theories that are so compelling that it’s worth doing a comprehensive and systematically deep set of searches to see if they are Physics Beyond the Standard Model APS April Meeting 4 realized in nature” – Anonymous David Toback, Texas A&M University Mini-Symposium May, 2009
What is Supersymmetry? S Supersymmetry (SUSY) is a theory that t (SUSY) i th th t postulates a symmetry between fermions and bosons Q|Boson> = |Fermion> Q|Fermion> = |Boson> Q|Fermion> = |Boson> Minimal Supersymmetric Standard Model (MSSM) Quarks Squarks Gauge Bosons Gauginos The gaugino states mix L pt n Sl pt n Leptons Sleptons Refer to them as f h Charginos and Neutralinos Physics Beyond the Standard Model APS April Meeting 5 David Toback, Texas A&M University Mini-Symposium May, 2009
Dark Matter? G l Galaxy structure and t t d rotations well explained by lots of explained by lots of “Dark Matter” we can’t see directly Mostly clumped at the center due to gravity gravity Lots of it in a “halo” around the entire around the entire galaxy Physics Beyond the Standard Model APS April Meeting 6 David Toback, Texas A&M University Mini-Symposium May, 2009
Evidence for Dark Matter as Particles Colliding Galaxies Colliding Galaxies Galaxy Galaxy Galaxy Blue is the part from Red part from x-ray lensing only observations light “Fast Dark Matter” “Slow Stars” Light from a Galaxy Li ht f m G l x Stars and Stars and D Dark Matter k M tt D Dark Matter k M tt Physics Beyond the Standard Model APS April Meeting 7 David Toback, Texas A&M University Mini-Symposium May, 2009
Particle Physics solution to an Astronomy problem? • Good: Predict massive stable particles that can collect in the p galaxy and have an impact on the way it rotates y • Better: Provide both a model of particle physics and cosmology that particle physics and cosmology that gets the Early Universe Physics correct and correctly predicts the correct and correctly predicts the Dark Matter Relic Density Physics Beyond the Standard Model APS April Meeting 8 David Toback, Texas A&M University Mini-Symposium May, 2009
Dark Matter = Supersymmetric Particles? Supersymmetric Particles? SUSY provides a Not good enough to simply provide a candidate, need to describe full calculation early Universe physics and l h d correctly predict the Dark of SUSY DM Physics Beyond the Standard Model APS April Meeting Matter relic density 9 David Toback, Texas A&M University Mini-Symposium May, 2009
Cosmology and Particle Physics? Mi i Minimal Solution with l S l ti ith N Non-Minimal Solution Mi i l S l ti Non-Minimal Solution N M l l with Warm Dark with Cold Dark Matter Cold Dark Matter Matter • Many non-Minimal • Minimal Solution A Warm Dark Matter also solutions to the Dark particle produced in consistent with consistent with Matter we observe M tt b th the early Universe is l U i i Astronomical data and today stable and weakly inflation models interacting still • Example: Long-lived here today Charged particles E x a m p le : G a ug e (CHAMPS) that decay (CHAMPS) that decay • CDM favored by CDM favored by M Md e d i ia t e d d S S U U S S Y Y i h w it h to the Dark Matter most Cosmological ~ ~ 0 χ G models 1 E x a m p le : C H A M P • Lots of ~ ~ Supersymmetry Supersymmetry 0 0 χ Dark Matter is more 1 models have a complicated or has lightest particle that nothing to do with fits this description SUSY • The minimal SUSY The minimal SUSY Stable on Stable on Stable on Stable on • Axions? model that the the incorporates Look for the most timescale timescale supergravity grand general models of of the age unification is known including R-Parity inflation of the as mSUGRA our SUGRA violating scenarios i l ti i Universe baseline Cold Dark Matter search model Physics Beyond the Standard Model APS April Meeting 10 David Toback, Texas A&M University Mini-Symposium May, 2009
Outline of the Searches • The Tevatron and the Th T t d th Detectors • mSUGRA Searches – Squarks & Gluinos Squarks & Gluinos – Gaugino Pair Production Production – Indirect Searches • Gauge Mediated Searches • Conclusions Physics Beyond the Standard Model APS April Meeting 11 David Toback, Texas A&M University Mini-Symposium May, 2009
The Fermilab Tevatron Protons and anti Protons and anti- protons collide with s = 1.96TeV • The Tevatron is the high Energy Frontier until LHC turn-on until LHC turn on • Rumours of running until 2012 to be complementary to LHC complementary to LHC Data coming in very nicely and getting nicely and getting better all the time Delivered: ~6.5 fb Delivered: ~6.5 fb -1 1 Acquired: ~5.5 fb -1 Acquired: ~5.5 fb 1 Analyzed: ~2 Analyzed: ~2- -4 fb 4 fb -1 1 Physics Beyond the Standard Model APS April Meeting (depending on the analysis) (depending on the analysis) 12 David Toback, Texas A&M University Mini-Symposium May, 2009
The CDF and DØ Detectors Powerful multi-purpose detectors High quality identification for electrons High quality identification for electrons, muons, taus, jets, Missing Energy, photons, b’s etc . Physics Beyond the Standard Model APS April Meeting 13 David Toback, Texas A&M University Mini-Symposium May, 2009
Aside for our LHC Friends Most analyses will look M t l ill l k “It’s a lot of like they were easy work to make it look this easy look this easy” Nota Bene: It’s 2009 Nota Bene: It s 2009 – Joe DiMaggio and we’re 8 years into running g This is a lot harder than it looks and it takes a lot longer than it l t l th it “In Theory, should theory and practice are the practice are the I’ll try to comment I ll try to comment same. In periodically on lessons practice, they’re for LHC different” different – Yogi Berra Physics Beyond the Standard Model APS April Meeting 14 David Toback, Texas A&M University Mini-Symposium May, 2009
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