Top Physics at CDF ++

1. Top Physics at CDF ++ Top Quark and New Physics with an eye toward the LHC • Work completed and in progress • Top dilepton cross-section (Hill, Incandela, Mills) • Ported Stuart’s Phoenix electrons to top group as a dowry • Dileptons benefit the most • Dilepton cross-section and events in Run I were curiosities and new data was important here • UCSB (Hill and Mills) played a major role here, beyond expectations • Published result based on ~ twice Run I sample – no curiosities to speak of • Mills, now a seasoned veteran, leading the effort to repeat and improve the analysis with a larger data sample (factor 2.5) • A new method to measure top mass (Hill, Incandela, Lamb) • Critical SM parameter • esp. because of top’s potential relationship to Higgs and new physics • New method based on simple idea – but not simple to apply • Studied application at Tevatron and LHC

2. Progress and Plans • Near term • Complete Dilepton cross-section with ~500 pb-1 of data this year (Mills, Incandela) • First measure of Top mass using new method (Hill, Incandela) • A first measure of top+jets (Affolder, Incandela, Lamb) • Crucial to understand as background to many LHC studies • Follow up an interest in ttH • Set limits on production at CDF • Prepare for a search at LHC on CMS • Other activities (will likely have some linkage with Campagnari and Stuart in tool development, expertise) • Involved in CMS tracking group • Will be crucial to be prepared to really search for new physics with multiple leptons in first weeks of running • Black Holes and other extravagant aspects of gravity.... (Hill, Incandela, Koay)

3. CMS Physics • What we’ve done • Top mass at LHC (J. Lamb)– we have now exercised the machinery • More can be done for LHC study – (one student to get involved here) • LPC tracking group (J.I.)– US is responsible for tracking algorithm in absence of Pixels (could be the case if running begins as scheduled) : I attend these meetings • Bring experience with silicon tracking, for the moment • Next two years: Two pronged attack • Early running: SUSY/New physics search in multi-leptons • Involves building up our effort in the CMS tracking software group with involvement of a post-doc (search underway now) + 1 student • First 10 fb-1 of data: Search for Higgs in ttH channel • Developed tools for such a search at Tevatron – we believe we may have a method that will be more sensitive than others • Students to work directly with me and Chris Hill on this (Koay, Lamb) • PRS work: • Our goal would be to have top mass and ttH work in the physics TDR

4. CMS Physics • 2006 Onward • UCSB will have 3-4 faculty on CMS • Responsibilities for tracker will drop off dramatically • US construction complete • CERN installation underway but involves more shared effort • Already in 2005 we are putting in place the best possible personnel to handle the commissioning and M&O • N. Bacchetta on board now – • UCSB will be involved in M&O but far from principal player here • Group at CERN of 1+ faculty + 2-3 PDs + 2-3 student with 50% M&O responsibilities will be able to mount major analyses • Group at UCSB will work with CERN and LPC (How this will work is being defined as we go) • Fully expect to be ready for physics at CMS • Early new physics search (key will be our group at CERN) • Beginning to look into things like black holes as well as the standard culprits • 1-2 y data to establish ttH (could have US based effort play larger role) • EWK and other measurements – could be US entirely

5. Squarks and Gluinos ~ ~ • SUSY could be discovered in one good month of operation … The figure shows the q, g mass reach for various luminosities in the inclusive ET + jets channel.

6. Gluino reconstruction ~ (26 %) p p g b b   (35 %) ~ (0.2 %) c 0 1 ~ ~ (60 %) 0 - + + - c l l l l  1 + - l l p - l b ~ + l + l b p ~ • Event final state: •  2 high pt isolated leptons OS •  2 high pt b jets • missing Et M. Chiorboli UCSB could play a significant role here…

7. Ideas at September CMS Week • Add top mass method to Physics TDR • Do real blind search (e.g. SUSY) to develop methods to disentangle non-SM signals • Existing studies appear very model dependent • Translate knowledge of why jets fake leptons at CDF (e.g. 0+ coincidence) to CMS • Combine w/ parallel effort on b-tagging, add to all analyses, specifically ttH as an example for TDR • Black holes • Signatures that do not depend on ETmiss • Integration of generators (service?) • Study inclusive dilepton+MET analysis a la Duke for application at LHC • Phoenix muons?

8. Talks Today • Top Dileptons • Corrinne Mills • Top Mass – A new method and its application at CDF • Chris Hill • Top Mass – Application of a new method at the LHC • Jim Lamb

9. Timeline (ca. 2001)

10. Timeline (ca. 2004)