Theoretical particle physics at the LHC Era

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1 Theoretical particle physics at the LHC Era Department of Physics University of Arizona S. Su BRC visit 1

2 Welcome! I am Shufang Su. S. Su BRC visit 2

3 What s hot in particle physics today? S. Su BRC visit 3

4 Particles and Forces Building blocks of matter -- elementary particles smaller distance : higher energy Fundamental interactions forces Gravity Electromagnetic force Weak interaction burning of the sun Strong interaction holds proton and neutron S. Su BRC visit 4

5 Standard Model of Particle Physics - S. Su BRC visit 5

6 Standard Model of Particle Physics - Strong interactions S. Su BRC visit 5

7 Standard Model of Particle Physics - Strong interactions S. Su BRC visit 5

8 Standard Model of Particle Physics - Strong interactions Origin of mass S. Su BRC visit 5

9 Standard Model of Particle Physics - Strong interactions Origin of mass S. Su BRC visit 5

10 Standard Model of Particle Physics - Strong interactions Origin of mass +gravity Unification S. Su BRC visit 5

11 Standard Model of Particle Physics - Strong interactions Origin of mass +gravity Unification S. Su BRC visit 5

12 LEP (-2000) - e + e - S. Su BRC visit 6

13 LEP (-2000) Tevatron (now) - e + e - p S. Su BRC visit 6

14 LEP (-2000) Tevatron (now) - e + e - p LHC (2008) S. Su BRC visit 6 p p

15 LEP (-2000) Tevatron (now) - e + e - p LC LHC (2008) S. Su BRC visit 6 p p

16 LEP (-2000) Tevatron (now) - e + e - p We live in an exciting era when rich data is / will become available LC LHC (2008) S. Su BRC visit 6 p p

17 Group S. Su BRC visit 7

18 Group Members - Faculty: Zackaria Chacko Keith Dienes Ina Sarcevic Shufang Su Doug Toussaint S. Su BRC visit 8

19 Group Members - Postdocs (for Dienes, Su and Toussaint) Current: Alexei Bazavov (2007) FSU UA Brooks Thomas (2007) Michigan UA Previous: Dru Renner ( ) MIT UA DESY Hock-Seng Goh ( ) Maryland UA Berkeley Sabine Hossenfelder ( ) Germany UA Santa Barbara S. Su BRC visit 9

20 Students (for Dienes, Su and Toussaint) Sky Bauman Dienes Steve Bildstein Toussaint (2005) Chris Krenke Chacko Ethan Dolle Su Walter Freeman Toussaint Mike Lennek Dienes (2007) Xinyu Miao Su Baran Nosratpour Chacko Menika Sharma Dienes S. Su BRC visit 10 Vaibhav Wasnik Dienes

21 Students (for Dienes, Su and Toussaint) Sky Bauman Dienes Steve Bildstein Toussaint (2005) Chris Krenke Chacko Ethan Dolle Su Walter Freeman Toussaint Mike Lennek Dienes (2007) Xinyu Miao Su Baran Nosratpour Chacko Menika Sharma Dienes S. Su BRC visit 10 Vaibhav Wasnik Dienes

22 Close research connections to other groups - Nuclear physics Barrett, Fleming, van Kolck Heavy Ion Rafelski, Thews Experimental high energy Rutherfoord, Shupe, Johns, Cheu, Varnes Theoretical astrophysics group Fang, Melia, Ozel, Psaltis S. Su BRC visit 11

23 Research S. Su BRC visit 12

24 theor Pheno Model-analyzers Model-builders LHC Physics Energy S. Su BRC visit 13

25 theor Pheno Model-analyzers Model-builders 10-3 GeV LHC Physics Energy S. Su BRC visit 13

26 theor Pheno Model-analyzers Model-builders Toussaint 10-3 GeV LHC Physics Energy S. Su BRC visit 13

27 theor Pheno Model-analyzers Model-builders Toussaint LHC Physics Energy 10-3 GeV 10 3 GeV q l g h S. Su BRC visit 13

28 theor Pheno Model-analyzers Su Model-builders Toussaint LHC Physics Energy 10-3 GeV 10 3 GeV q l g h S. Su BRC visit 13

29 theor Pheno Model-analyzers Su Model-builders Toussaint Chacko LHC Physics Energy 10-3 GeV 10 3 GeV q l g h S. Su BRC visit 13

30 theor Pheno Model-analyzers Su Model-builders Toussaint Chacko LHC Physics Energy 10-3 GeV 10 3 GeV q l g h GeV S. Su BRC visit 13

31 theor Pheno Model-analyzers Su Model-builders Toussaint Chacko Dienes LHC Physics Energy 10-3 GeV 10 3 GeV q l g h GeV S. Su BRC visit 13

32 Lattice QCD at U. of A. - D. Toussaint Calculations including dynamical quarks The MILC Collaboration 14 Physicists, 9 institutions at Arizona: Doug Toussaint, Alexei Bazavov, Walter Freeman The Fermilab/MILC Collaboration add the Fermilab group The HotQCD Collaboration High temperature QCD, using the Livermore machines The USQCD Collaboration Collaboration of collaborations - hardware and software for lattice work S. Su BRC visit 14

33 - 1. Demonstrate control of QCD calculations by calculating known things 2. Calculate matrix elements needed to find standard model parameters for experiments 3. or maybe beyond the standard model? 4. Understand the workings of QCD (confinement) 5. Hadronic phenomenology, for example low energy constants in chiral perturbation theory 6. Development of techniques for better simulations S. Su BRC visit 15

34 - Lattice QCD can now compute some things with accuracy of a few percent. Ratios of lattice results to experimental values for gold plated things. S. Su BRC visit 16

35 Electroweak Physics at U. of A - Z. Chacko, S. Su Standard Model: a successful model Many open questions requires new physics beyond the SM S. Su BRC visit 17

36 Electroweak Physics at U. of A - Z. Chacko, S. Su Standard Model: a successful model We work on physics beyond the SM that could potentially be discovered in the current and upcoming experiments. Many open questions requires new physics beyond the SM S. Su BRC visit 17

37 Electroweak Physics at U. of A - Z. Chacko Supersymmetry: boson fermion, extension of Lorentz symmetry Extra dimension: D > 4? Grand unification: weak, strong and electromagnetic forces a single grand unifying force? Neutrino physics: origin of neutrino masses? Cosmology: past history / future of the universe? Modification of Einstein gravity: modifications possible? experimental constraints? S. Su BRC visit 18

38 Electroweak Physics at U. of A - Working on similar stuff as Chacko. However, focus on S. Su Theory Experiments S. Su BRC visit 19

39 Electroweak Physics at U. of A - Working on similar stuff as Chacko. However, focus on S. Su Theory Experiments Particle physics Astrophysics S. Su BRC visit 19

40 Electroweak Physics at U. of A - Working on similar stuff as Chacko. However, focus on S. Su Theory Experiments Particle physics Astrophysics Dark matter, dark energy CMB, BBN Baryongenesis S. Su BRC visit 19

41 String Phenomenology at U. of A K. Dienes - String Phenomenology S. Su BRC visit 20

42 String Phenomenology at U. of A K. Dienes - the interplay or meeting-ground between Planck-scale physics and TeV-scale physics the art of using the new insights from string theory in order to understand, explain, and predict what physics at next energy scale is going to look like String Phenomenology S. Su BRC visit 20

43 String Phenomenology at U. of A K. Dienes - String Phenomenology S. Su BRC visit 20

44 String Phenomenology at U. of A K. Dienes - String Phenomenology Standard Model choice of gauge group number of generations masses mixings, etc S. Su BRC visit 20

45 String Phenomenology at U. of A K. Dienes - String Phenomenology Standard Model choice of gauge group number of generations masses Extensions to SM: SUSY GUT s hidden sectors mixings, etc technicolor S. Su BRC visit 20

46 String Phenomenology at U. of A Formal Issues: string vacuum selection non-pert. dynamics string duality K. Dienes - new mathematical structure String Phenomenology Standard Model choice of gauge group number of generations masses Extensions to SM: SUSY GUT s hidden sectors mixings, etc technicolor S. Su BRC visit 20

47 String Phenomenology at U. of A K. Dienes - Formal Issues: string vacuum selection non-pert. dynamics string duality new mathematical structure String Cosmology: role of dilaton effects of light d.o.f. s extra dimensions CC problem String Phenomenology Standard Model choice of gauge group number of generations masses Extensions to SM: SUSY GUT s hidden sectors mixings, etc technicolor S. Su BRC visit 20

48 Research related Activities S. Su BRC visit 21

49 Research related Activities Seminars, colloquiua and Visitors - Group meetings journal club (with nuclear theory group) brown bag lunch (with nuclear theory group) discussion group on dark energy and early universe (with theoretical astrophysics group and astronomy dept.) Summer schools and conferences lecture at summer schools, etc. plenary talks at conferences/workshops organize conferences/workshops SUSY03, LATTICE06, Rethinking Gravity, string landscape workshop... S. Su BRC visit 22

50 Urgent Need S. Su BRC visit 23

51 Urgent Need Replacement of Chacko! S. Su BRC visit 23

52 LHC Era LHC (2008) LHC (2008): golden era for particle physics p p Theoretical particle physics: critical - what to expect? - How to interpret? For Arizona to maintain its influence and impact in the overall LHC enterprise a strong HEP theory group! S. Su BRC visit 24

53 theor Pheno Su Model-analyzers Model-builders Toussaint Chacko Dienes LHC Physics 10-3 GeV 10 3 GeV Energy GeV S. Su BRC visit 25

54 theor Pheno Sarcevic Su Model-analyzers Model-builders Toussaint Chacko Dienes LHC Physics 10-3 GeV 10 3 GeV Energy GeV S. Su BRC visit 25

55 theor Pheno Sarcevic Su Model-analyzers Model-builders Toussaint Chacko Dienes LHC Physics 10-3 GeV 10 3 GeV Energy GeV HEP theory group has been highly successful by any measure of excellence! S. Su BRC visit 25

56 theor Pheno Sarcevic Su Model-analyzers Model-builders Toussaint LHC-energy model builder Dienes LHC Physics 10-3 GeV 10 3 GeV Energy GeV HEP theory group has been highly successful by any measure of excellence! S. Su BRC visit 25

57 This can not wait! Imminent turn on of LHC (finally!) Remain competitive with other universities Danger of further external raid, melt-down of HEP theory group Minimal start-up, immense payoff Sustain current grant support Aggressive, smart hiring over past decade Department-wide agreement: top priority S. Su BRC visit 26

58 This can not wait! Imminent turn on of LHC (finally!) Remain competitive with other universities Danger of further external raid, melt-down of HEP theory group Minimal start-up, immense payoff Sustain current grant support Aggressive, smart hiring over past decade Department-wide agreement: top priority Need to move aggressively right now. S. Su BRC visit 26

59 Thanks! S. Su BRC visit 27

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