Agenda. ATLAS. DØ. n , p decay, DUSEL. Mariachi. The Stony Brook Group makeup – three NSF grants, two DOE tasks: Seen from within, the boundaries between grants are highly permeable. We are one unified HEP group.
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n, p decay, DUSEL
Stony Brook Grant support (approximate yearly totals):
Current base grants:
ATLAS MoU support: ~$80K
K2K MoU suppport: ~$80K
Evolution of Stony Brook experiments
K2K – T2K
AGS Direct electrons
FNAL Dileptons/ dihadrons
Some notable Stony Brook physics achievements:
FNAL E605: Discovery of Upsilon (Upsilon’ and ’’)
CUSB: Upsilon 4S discovery, bottomonium spectroscopy
ISR: rising total pp and ppbar cross sections, high pTp0
AGS E650: anomalous high pT e- and e+e- production
DØ: top discovery, cross section & mass; W boson mass; high pTg, W/Z; high pT jet production; BS mixing; trilinear gauge boson coupling; BFKL pomeron …
SuperK: atmospheric neutrino mass and mixing discovery
K2K: mixing in accelerator neutrinos
Some major Stony Brook hardware fabrication:
CUSB: crystal calorimeter electronics, DAQ
E605: first ring imaging Cerenkov detector
ISR: p0 spectrometer
AGS electrons: electron/photon calorimeters
DØ: central drift chamber, LAr calorimeter electronics, forward preshower, level 1 preshower trigger, Layer 0 silicon strips
SuperK: outer detector PM testing
K2K: near detector scintillating strips
ATLAS: calorimeter HV feedthroughs
*Ties Behnke – Central drift chamber tests (faculty, Univ. Hamburg/DESY)
*Domenic Pizzuto – drift chamber performance (financial industry)
Jim Cochran – top cross section (em channel) (faculty, Iowa State)
Joey Thompson – top cross section (m+jets channel) (Photo-optics industry)
*Terry Heuring – electrons in central calorimeter (Defense Dept)
Marc Paterno – squark gluino search (Fermilab staff)
*Paul Rubinov – direct photon angular dist. (Fermilab staff)
*Dhiman Chakraborty – top production (faculty, No. Illinois Univ.)
*Jaehoon Yu – jet production/aS (faculty, Univ Texas Arlington)
*Scott Snyder – top quark mass (BNL staff physicist)
Hailin Li -- W→ t and lepton universality (software industry)
*Ting Hu – W width (software industry)
*John Jiang – pT distribution of Z’s (SLAC/industry in CA)
*Greg Landsberg – Trilinear ZZg, Zgg couplings (faculty, Brown Univ.)
*Wei Chen – direct diphoton production
Dennis Shpakov – WZ mass ratio (Fermilab staff)
*Slava Kulik – W mass (financial industry)
Marian Zdrazil – doubly charged Higgs search (postdoc LBNL)
*Zarah Casilum – Z+jets production (via SUNY Buffalo)
Abid Patwa – forward preshower and J/y trigger (BNL staff)
Zhong Min Wang – jet production
*Yildirim Mutaf – Zb production (Mayo clinic postdoc)
*Satish Desai – technicolor search in W(m)bb (Fermilab postdoc)
Where do our students go?
An example - Stony Brook PhDs from DØ
(* = NSF support)
23 PhDs – 12 now in HEP
NSFa Group profile:
Jun Guo – DØ calorimeter, W mass in electron channel
Emanuel Strauss – DØ, calorimeter calibrations
Katy Tschann-Grimm – ATLAS calorimeter, g production
Mustapha Thioye – ATLAS calorimeter (shared with DOE)
Jet Goodson – ATLAS calorimeter, missing ET
Yuan Hu – DØ preshower, t trigger, ttbb final states
Dmitri Tsybychev – DØ Si Vtx leader, B physics
Adam Yurkewicz – ATLAS calibrations, DØ W mass
New (replacement for N. Parua) – ATLAS
Physics goals of the NSFa group
Our colleagues in DOEb group are addressing many of these questions; we benefit from our close interactions. See talks by Jung and McGrew.
Those of us in the NSFa group have primarily focussed on the last two questions for the past 20 years, and see great opportunity to make substantial progress in the coming years. The prospect for significant new fundamental understanding is great.
The DØ Program
Tevatron should run through FY2009; goal is 8 fb-1 accumulated by end of run. Now have ~2 fb-1. Tevatron is performing very well.
Mean initial luminosity
Integrated luminosity (fb-1)
FY04 FY05 FY06 FY07 FY08 FY09
Primary goals for remaining DØ run: Search for Higgs; constrain SM through top and W mass; evidence for new physics; explore the heavy b-quark states and rare decays.
Dean Schamberger, John Hobbs will discuss in more detail.
SM Higgs boson search
From 2006 summer conferences: within factor ~5 of SM rate.
95% confidence exclusion at Higgs mass:
< 185 GeV
By end of run, DØ/CDF combined can rule out (95% CL) Higgs up to 185 GeV. 5s discovery for mH < 120 GeV.
< 160 GeV
Discover Higgs at 115 GeV
SB involvement in Higgs search will continue – Grannis, Hobbs, Hu, students.
First definitive breakdown of EW Standard Model?
Measure W mass to 40 MeV in each experiment (McCarthy, J. Guo, Hobbs, Zhu, F. Guo). Expect each experiment to measure top mass to 2.5 GeV. (Note that improvement on dmW is even more important than dmt.)
The combination of decreasing errors on W and top masses, and extending the Higgs mass exclusion to higher mass can lead to a clear violation of the SM.
Observing the Higgs would be even better!
b-quark states – heavy systems, rare decays, Bs mixing
D. Tsybychev is a primary player in B physics studies.
New b state spectroscopy
First limit on Bs mixing (CDF did better)
Bs → mm search
DØ strengths are in lepton decay modes, larger acceptance, forward decays.
Bob McCarthy, Rod Engelmann, Michael Rijssenbeek will discuss in more detail.
Stony Brook now in CERN to commission, ATLAS – Rijssenbeek, Yurkiewicz, Tschann-Grimm, Thioye (Goodson) + 1 new postdoc. Weekly meetings by video.
International Linear Collider
We expect that the Tevatron and LHC will make dramatic discoveries that extend our understanding of the Electroweak scale and its connection to the GUT/Planck scales. We should also expect that these discoveries require more precise studies to understand what they mean. The ILC can provide new discoveries and illuminate those from LHC.
e.g. LHC will not measure Higgs branching ratios accurately. Deviations of these BRs from SM prediction can tell us whether it is SM Higgs or some other model. ILC can achieve the required precision.
Coupling to Higgs →
Ratios of Higgs BRs to SM
Another example of LHC – ILC synergy: LHC sees a heavy Z state decaying to dileptons. It could be Kaluza Klein state or any of many variants of new strong coupling models. ILC can determine its character through accurate measurement of V and A couplings.
ILC detectors are challenging in complementary ways to LHC; need to identify quarks (high quality pixel vertex detectors) and give very good resolution for jet energy (goal is dE/E = 30%/√E). This requires ‘particle flow calorimetry’ with very fine segmentation, new pattern recognition algorithms for clustering deposits.
These calorimetric techniques have not yet been demonstrated – need test beam validation, software development, benchmarking of full simulation Monte Carlos. We expect to contribute to this program with supplemental funding from ILC detector funds.
Mike Marx, Bob McCarthy will talk more on educational outreach efforts. We have also given numerous talks to describe our science to public audiences.
Proposed disposition of effort
Individual postdocs may leave; replacements fill in as shown.
Grad students now 50% DØ, 50% ATLAS; will become predominantly ATLAS at end of 3 yr period. Expect new students to work on ILC R&D during first two years while taking courses.
NSFa 3 year budget proposal
Salaries, fringe and associated overheads are xx%, yy%, zz%
Maintenance, software licenses, miscellaneous: xx%, yy%, zz%
n, p decay, DUSEL